A servo walking lifting type feeding machine and feeding method for square tube printing

Abstract

The application relates to a feeding technology field, in particular to a servo walking lifting type feeding machine and a feeding method for square tube lettering, which comprise a first conveying wheel assembly and a turnover rod installed on the right side of the first conveying wheel assembly, a bearing slide is arranged below the right side of the turnover rod, a turnover assembly for conveying the square tube on the first conveying wheel assembly to the bearing slide is installed on the outer side of the turnover rod, an adjusting surface assembly for adjusting the lettering surface of the square tube is arranged on the right side of the bearing slide, support frames are symmetrically arranged on the right side of the bearing slide, and a chain wheel assembly is installed on the inner side of the support frame. The servo walking lifting type feeding machine and the feeding method for square tube lettering make the square tube be turned over by 90 degrees when the lifting feeding mechanism feeds the square tube to the first bearing block, so that the square tube does not need to be turned over in the first bearing block, the precision of the turnover position is improved, and manual turnover assistance is not needed.

Description

Technical Field

[0001] This invention relates to the field of material feeding technology, specifically to a servo-driven walking lifting type material feeding machine and method for printing characters on square tubes. Background Technology

[0002] After the square tubes are manufactured, a printing machine is used to print logos and fonts onto their surface. Because the wider side of the square tube has weld seams, the logos and fonts must be printed on the narrower side. During this process, a feeding machine is used to load batches of square tubes onto the printing machine. If the square tubes were fed directly with the narrower side facing upwards, the feeding would be unstable, causing the tubes to tip over. This would not only result in collisions but also require flipping the tubes back so that the narrower side faces upwards. Therefore, to ensure feeding stability, square tubes are currently fed with the wider side facing upwards. Then, when the tubes reach the printing machine, they are flipped, allowing the printing machine to continuously print on the narrower side of batches of square tubes. Currently, the feeding machines on the market use a flipping arm to flip the square tubes. During the flipping process, the square tubes are prone to getting stuck on the pipe distributor if they are not flipped in place. At this time, manual assistance is required to flip them. In addition, the square tubes are also prone to collisions with the equipment, causing damage to the tube surface.

[0003] The prior art patent with publication number "CN223534195U" is entitled "A Lifting-Type Pipe Feeding Device". It discloses that a large-diameter pipe to be processed is placed on a support seat. A motor drives a first chain to rotate, causing the feeding seat to move along the guide rail to the position of the nearest pipe. Then, the piston rod of the cylinder extends, causing the lifting frame to rise and lift the pipe, thus detaching it from the support seat. Then, the motor drives the first chain to rotate in the opposite direction, causing the feeding seat to lift the pipe to the front position of the feeding frame. A follow-up support device is set at the position corresponding to the feeding seat on the pipe cutting machine. The follow-up support device lifts the pipe held by the feeding seat and is clamped by a chuck and transported to the position of the laser head for cutting. After the pipe cutting machine completes the cutting of the first pipe, the first chain drives the feeding seat to move to the position of the second pipe, and the above operation is repeated to realize the feeding of pipes.

[0004] The existing feeding machines described above, while capable of lifting and feeding pipes using a support frame to reduce jamming and impact, can only provide simple support. When printing on the narrow surface of square tubes, the feeding machine cannot simultaneously feed the tube and adjust the printing surface, thus failing to meet diverse processing requirements. Therefore, this invention proposes a servo-driven, lifting feeding machine and method for printing on square tubes, to address the aforementioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a servo-driven walking lifting type feeder and feeding method for printing on square tubes, so as to solve the problem mentioned in the background art that the feeders on the market cannot feed square tubes at the same time and adjust the printing surface of the square tubes at the same time, thus making the feeders unable to meet different processing and usage needs.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A servo-driven, lifting-type feeding machine for printing on square tubes includes a first conveying wheel assembly and a tilting rod mounted on its right side. A bearing carriage is provided below the right side of the tilting rod, and a tilting component for conveying the square tubes on the first conveying wheel assembly to the bearing carriage is installed on the outside of the tilting rod. A surface adjustment component for adjusting the printing surface of the square tubes is provided on the right side of the bearing carriage, and a support frame is symmetrically arranged on the right side of the bearing carriage. A sprocket assembly is installed inside the support frame, and a movable frame is installed outside the sprocket assembly. A first electric push rod is installed through the movable frame, and a lifting feeding mechanism is installed at the top of the first electric push rod. A support conveying assembly is installed on the right side of the support frame.

[0008] Preferably, the material turning assembly includes a turning plate and a receiving plate installed at equal intervals on the outside of the turning rod. The receiving plate is arranged in an "L" shape, and one end of the turning plate and one end of the receiving plate form a "V" shape structure. The length of the turning plate is greater than the length of the receiving plate. The bearing carriage is inclined, and the length of the turning plate is greater than the longest distance between the turning rod and the first conveying wheel assembly.

[0009] Preferably, the mixing assembly includes a chain plate conveying mechanism disposed on the right side of the bearing carriage, and a material distribution plate and baffles are installed at equal intervals on the outer side of the chain plate conveying mechanism. A row of baffles is disposed on one side of the material distribution plate, the height of the material distribution plate is greater than the height of the baffles, and the outer side of the material distribution plate is chamfered.

[0010] Preferably, the lifting and feeding mechanism includes two first lifting and feeding blocks installed above the first electric push rod, and the upper part of the first lifting and feeding block is U-shaped, and the upper inner sidewall of the first lifting and feeding block is inclined.

[0011] Preferably, the support conveying assembly includes a first bearing block and a second conveying wheel assembly installed on the right side of the support frame. The first bearing block is provided in two sets, with four in each set. The second conveying wheel assembly is provided in the space between the two sets of first bearing blocks. The first bearing block and the first lifting and feeding block have the same shape and size. The inner side of the support frame is slidably connected to the moving frame through a guide rail.

[0012] Preferably, a guide rod is installed in the groove on one side of the flipping plate near the receiving plate. A counterweight slider is slidably connected to one end of the guide rod, and a reset spring is nested on the other end of the guide rod. A temporary plate in the shape of a mirror "L" is fixed on the top of the counterweight slider.

[0013] Preferably, the lifting and feeding mechanism includes a second lifting and feeding frame installed above the first electric push rod, and the upper part of the second lifting and feeding frame is U-shaped, and the upper inner wall of the second lifting and feeding frame is inclined.

[0014] The support and conveying assembly includes a second bearing block and a third conveying wheel assembly installed on the right side of the support frame. There are two sets of second bearing blocks, with two in each set. The space between the two sets of second bearing blocks is provided with the third conveying wheel assembly. The second bearing block is arranged in a "mountain" shape, and the upper inner sidewall of the second bearing block is inclined. There are two slots on the upper part of the second bearing block for placing the square tube.

[0015] Preferably, the mixing assembly includes a second electric push rod installed in a slot inside the second lifting and feeding frame, and a top block is fixed at the upper output end of the second electric push rod. The vertical center line of the top block coincides with the vertical center line of the second lifting and feeding frame, and the upper part of the top block is a rounded isosceles triangle shape, while the lower part of the top block is rectangular.

[0016] Preferably, pressure sensors are installed in symmetrical slots on the upper inner sidewall of the second lifting and feeding frame.

[0017] Another technical solution provided by the present invention is a servo-driven walking lifting feeding method for printing characters on square tubes, comprising the following steps:

[0018] S1: The tipping rod drives the outer tipping plate and the receiving plate to rotate, so that the tipping plate and the receiving plate cooperate to stably transport the square tube on the first conveying wheel assembly to the bearing carriage, reducing the collision force;

[0019] S2: The inclined bearing carriage conveys the square tube to the right. Then, the chain conveyor mechanism drives the multi-group material distribution plates and baffles that are evenly distributed on the outside to rotate together. The material distribution plates and baffles cooperate to lift and flip a square tube on the upper right side of the bearing carriage.

[0020] S3: The sprocket assembly first drives the moving frame, the first electric push rod, and the two first lifting loading blocks to move to the left. Then the first electric push rod drives the two first lifting loading blocks to move upward. Next, the sprocket assembly drives the moving frame, the first electric push rod, and the two first lifting loading blocks to move to the right. The first electric push rod drives the two first lifting loading blocks to move downward. The two first lifting loading blocks then move to the left. This operation is repeated so that the two first lifting loading blocks lift the flipped square tubes on the chain plate conveyor mechanism into the first bearing block and the second conveyor wheel assembly inside the support conveyor assembly.

[0021] S4: Finally, the second conveyor wheel assembly rotates to convey the square tube, and the printing assembly above performs the printing operation.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] This servo-driven, lifting-type feeding machine and method for printing on square tubes allows the square tube to be rotated 90° by the time it is placed on the first support block, eliminating the need for flipping within the first support block. This improves the accuracy of the flipping position. Details are as follows:

[0024] (1) The adjustment assembly includes a chain plate conveyor mechanism, a distribution plate and a stop column. When the chain plate conveyor mechanism rotates, the distribution plate and the stop column in a set can be used together to flip multiple square tubes on the bearing carriage by 90° in sequence and place them in the space between the distribution plate and the stop column. This allows the square tubes to be flipped by 90° when the lifting and feeding mechanism feeds them onto the first bearing block. There is no need to use the flipping arm to flip them in the first bearing block. This improves the accuracy of the flipping position, avoids jamming, and eliminates the need for manual assistance in flipping. At the same time, rubber pads are installed on the outer side of the chain plate conveyor mechanism, the lifting and feeding mechanism and the inner side wall of the first bearing block to prevent the square tubes from colliding with the chain plate conveyor mechanism, the lifting and feeding mechanism and the first bearing block, thus preventing damage to the square tubes. This ensures that the flipped square tubes are stably placed in the first bearing block for printing operations, which can meet different usage requirements.

[0025] (2) When the tipping bar rotates, the square tube on the tipping plate falls onto the receiving plate. Then, the outer protrusion of the receiving plate, which is in the shape of an "L", blocks the square tube, preventing it from separating from the receiving plate before it comes into contact with the bearing carriage. This avoids the square tube from being damaged by a large impact when it falls onto the bearing carriage, and further protects the square tube.

[0026] (3) By setting up a temporary plate in the shape of a mirror “L”, the square tube is placed on the temporary plate. When the flipping plate rotates later, the counterweight slider drives the temporary plate and the square tube to move together in the direction of the flipping rod. During this process, the square tube and the temporary plate are in a relatively stationary state. Therefore, the square tube can avoid friction with the flipping plate when it moves, which can further protect the square tube.

[0027] (4) The adjustment component includes a top block installed inside the second lifting and feeding frame, which allows the second lifting and feeding frame to lift the square tube above the right side of the bearing slide upward, and then drive the top block, which is in the shape of an isosceles triangle, to rise through the second electric push rod. This allows the top block with rounded corners to flip the two square tubes without having to flip them inside the second bearing block, thus improving the accuracy of the flipping position and eliminating the need for manual assistance in flipping.

[0028] (5) By installing a pressure sensor on the inner wall of the second lifting and feeding frame, one side of the flipped square tube will contact the pressure sensor and generate pressure, while the other side of the unflipped square tube will not contact the pressure sensor. Therefore, the pressure sensor can be used to further intelligently detect whether the square tube has been successfully flipped. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0030] Figure 2 This is a schematic diagram of the main structure of the present invention;

[0031] Figure 3 This is a schematic diagram of the three-dimensional structure of the material turning rod of the present invention;

[0032] Figure 4 This is a schematic diagram of the three-dimensional structure of the flipping plate after rotation according to the present invention;

[0033] Figure 5 This is a schematic diagram of the main structure of the flipping plate of the present invention;

[0034] Figure 6 This is a top view schematic diagram of the chain plate conveyor mechanism of the present invention;

[0035] Figure 7 This is a schematic diagram of the three-dimensional structure of the support frame of the present invention;

[0036] Figure 8 This is a three-dimensional structural diagram of the first lifting and feeding block of the present invention;

[0037] Figure 9 This is a schematic diagram of the three-dimensional structure of the flipping plate in Embodiment 2 of the present invention;

[0038] Figure 10This is a schematic cross-sectional view of the material-turning plate in Embodiment 2 of the present invention;

[0039] Figure 11 This is a schematic diagram of the three-dimensional structure of the support frame in Embodiment 3 of the present invention;

[0040] Figure 12 This is a three-dimensional structural diagram of the second lifting and feeding frame of the present invention;

[0041] Figure 13 This is a schematic diagram of the three-dimensional structure of the second bearing block of the present invention;

[0042] Figure 14 This is a schematic cross-sectional view of the second lifting and feeding frame of the present invention;

[0043] Figure 15 This is a schematic diagram of the three-dimensional structure of the top block after it has been raised according to the present invention;

[0044] Figure 16 This is a schematic diagram of the moving trajectory structure of the material distribution plate of the present invention, which lifts and flips the square tube.

[0045] Figure 17 This is a schematic diagram of the upward trajectory structure of the top block in this invention.

[0046] In the diagram: 1. First conveyor wheel assembly; 2. Tilting rod; 3. Tilting plate; 301. Receiving plate; 302. Temporary plate; 303. Guide rod; 304. Return spring; 305. Counterweight slider; 4. Bearing carriage; 5. Chain conveyor mechanism; 501. Distributing plate; 502. Stop post; 6. Support frame; 61. Sprocket assembly; 7. First lifting and feeding block; 8. First bearing block; 9. Second conveyor wheel assembly; 10. Moving frame; 11. First electric push rod; 12. Second lifting and feeding frame; 13. Second bearing block; 14. Third conveyor wheel assembly; 15. Second electric push rod; 16. Top block; 17. Pressure sensor. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] Please see Figures 1-17 The present invention provides the following technical solution:

[0049] Example 1: In this example, a servo-driven, lifting-type feeding machine for printing on square tubes is described. When the lifting-feeding mechanism feeds the square tube onto the first support block 8, the tube has already rotated 90°, eliminating the need for further flipping on the first support block 8. This improves the accuracy of the flipping position, prevents jamming, and eliminates the need for manual assistance in flipping. See attached diagram for the specific structure. Figures 1-8 and Figure 16 As shown, the assembly includes a first conveyor wheel assembly 1 and a tilting rod 2 installed on its right side. A bearing carriage 4 is provided on the lower right side of the tilting rod 2, and a tilting component for conveying the square tube on the first conveyor wheel assembly 1 to the bearing carriage 4 is installed on the outside of the tilting rod 2. The tilting component includes a tilting plate 3 and a receiving plate 301 installed at equal intervals on the outside of the tilting rod 2. The receiving plate 301 is arranged in an "L" shape. One end of the tilting plate 3 and one end of the receiving plate 301 form a "V" shape structure, and the length of the tilting plate 3 is greater than the length of the receiving plate 301. The bearing carriage 4 is inclined, and the length of the tilting plate 3 is greater than the longest distance between the tilting rod 2 and the first conveyor wheel assembly 1.

[0050] In the above technical solution, multiple square tubes are first sequentially conveyed onto a row of first conveyor wheel assemblies 1 via an external conveying mechanism. Then, the front end of the tilting rod 2 is connected to an external motor, which drives the tilting rod 2 to rotate slowly clockwise. The tilting rod 2 drives multiple sets of tilting plates 3 and receiving plates 301 on the outside to rotate. When one of the tilting plates 3 rotates, it causes the square tubes on the first conveyor wheel assembly 1 to move upwards, separating the square tubes from the first conveyor wheel assembly 1. The square tubes then slide on the tilting plate 3 towards the tilting rod 2. Next, the tilting plate 3 flips the square tubes onto the shorter receiving plate 301, where they slide. The outer protrusion of the "L"-shaped receiving plate 301 blocks the square tubes, preventing them from sliding before contacting the bearing carriage 4. When the square tube on the receiving plate 301 separates from the bearing slide 4 and comes into contact with the upper left side of the bearing slide 4, the bearing slide 4 supports and blocks the square tube on the receiving plate 301, preventing the square tube from rotating and moving with the receiving plate 301. The turning rod 2 continues to drive the three sets of turning plates 3 on the outside and the receiving plate 301 to rotate. Then the square tube separates from the receiving plate 301 and slides to the right on the inclined bearing slide 4. This avoids the square tube from being damaged by a large impact when it falls on the bearing slide 4, and further protects the square tube. If the square tube on the bearing slide 4 is conveyed with the narrower side facing up during conveying, it will cause unstable conveying and the square tube will automatically flip over. Therefore, the square tube conveyed on the bearing slide 4 is conveyed with the wider side facing up.

[0051] Multiple rows of rolling bearings are installed on the bearing carriage 4, which can reduce the friction between the square tube and the bearing carriage 4. The right side of the bearing carriage 4 is set in a mirror "L" shape, so the square tube can be blocked by the protruding surface on the right side of the bearing carriage 4, thus preventing the square tube from separating from the bearing carriage 4.

[0052] The right side of the bearing carriage 4 is provided with a surface adjustment assembly for adjusting the printed surface of the square tube. The surface adjustment assembly includes a chain plate type conveyor mechanism 5 located on the right side of the bearing carriage 4. The chain plate type conveyor mechanism 5 is equipped with a material distribution plate 501 and a stop post 502 at equal intervals on the outer side. A row of stop posts 502 is provided on one side of the material distribution plate 501. The height of the material distribution plate 501 is greater than the height of the stop post 502. The outer side of the material distribution plate 501 is chamfered.

[0053] In the above technical solution, the chain conveyor mechanism 5 is simultaneously controlled by a PLC controller to rotate. When the chain conveyor mechanism 5 rotates, it drives the multiple distribution plates 501 and baffles 502, which are evenly spaced on the outer side, to rotate together. The height of the distribution plates 501 is greater than the height of the baffles 502. Due to the chamfered edges on the outer side of the distribution plates 501, when the corresponding distribution plate 501 rotates with the chain conveyor mechanism 5, it can separate the two square tubes at the upper right end of the bearing carriage 4. This allows the corresponding distribution plate 501 to lift one of the square tubes at the upper right end of the bearing carriage 4. Then, the corresponding distribution plate 501 continues to rotate with the chain conveyor mechanism 5. At this time, the square tube slides along the surface of the distribution plate 501 into the space between the distribution plate 501 and the baffle 502. The entire lifting and flipping trajectory is shown in the attached figure. Figure 16 As shown, the material distribution plate 501 lifts and flips a square tube above the right end of the bearing carriage 4, so that the flipped square tube falls into the space between the material distribution plate 501 and the stop post 502 in a set. At this time, the side with the smaller width of the square tube is facing up. The stop post 502 can limit the flipped square tube, so that the flipped square tube is stably placed on the chain plate conveyor mechanism 5 at equal intervals. The chain plate conveyor mechanism 5 conveys the square tube to the right.

[0054] Furthermore, a support frame 6 is symmetrically arranged on the right side of the bearing carriage 4. A sprocket assembly 61 is installed on the inner side of the support frame 6, and a movable frame 10 is installed on the outer side of the sprocket assembly 61. A first electric push rod 11 is installed through the interior of the movable frame 10, and a lifting and feeding mechanism is installed at the top of the first electric push rod 11. A support conveying assembly is installed on the right side of the support frame 6. The lifting and feeding mechanism includes two first lifting and feeding blocks 7 installed above the first electric push rod 11. The upper part of the first lifting and feeding block 7 is U-shaped, and the inner side wall of the upper part of the first lifting and feeding block 7 is inclined. The support conveying assembly includes a first bearing block 8 and a second conveying wheel assembly 9 installed on the right side of the support frame 6. There are two sets of first bearing blocks 8, with four in each set. The second conveying wheel assembly 9 is arranged in the space between the two sets of first bearing blocks 8. The first bearing blocks 8 and the first lifting and feeding blocks 7 have the same shape and size. The inner side of the support frame 6 is slidably connected to the movable frame 10 through a guide rail.

[0055] In the above technical solution, the motor on the outside of the support frame 6 is started to drive the sprocket assembly 61 to rotate. The sprocket assembly 61 first drives the moving frame 10, the first electric push rod 11, and the two first lifting loading blocks 7 to move to the left. At this time, the moving frame 10 slides stably on the guide rail installed on the inside of the support frame 6. When the two first lifting loading blocks 7 move to the corresponding positions below the two square tubes on the upper right side of the chain plate conveyor mechanism 5, the rotation of the sprocket assembly 61 is stopped, and the first electric push rod 11 is started to drive the two first lifting loading blocks 7 to move upward. The two first lifting and loading blocks 7 lift the two square tubes upwards. The inner sidewall of the upper part of the first lifting and loading blocks 7 is inclined, so that the two square tubes can stably enter the slots opened above the two first lifting and loading blocks 7. Then, the sprocket assembly 61 rotates in the opposite direction, driving the moving frame 10, the first electric push rod 11 and the two first lifting and loading blocks 7 to move to the right. When the two first lifting and loading blocks 7 move to the position between the two adjacent sets of first bearing blocks 8, the rotation of the sprocket assembly 61 stops, and the first electric push rod is activated. 11 drives the two first lifting and loading blocks 7 to move downwards, causing the square tubes on the first lifting and loading blocks 7 to fall into the groove opened above the first bearing block 8 and into the second conveyor wheel assembly 9. Then, the chain drives a row of second conveyor wheel assemblies 9 to rotate, causing the second conveyor wheel assemblies 9 to transport the square tubes. At this time, the printing assembly above moves downwards through the cylinder to print on the narrower side of the square tube. This operation is repeated, so that the first lifting and loading blocks 7 continuously transport the square tubes that have been flipped between the dividing plate 501 and the stop post 502. The tube is fed by a lifting mechanism, eliminating the need for subsequent flipping within the first support block 8. This improves the accuracy of the flipping position, prevents jamming, and eliminates the need for manual assistance in flipping. Rubber pads are installed on the outer side of the chain conveyor mechanism 5, the inner sidewalls of the first lifting block 7 and the first support block 8 to prevent the square tube from colliding with these components and causing damage. This ensures that the flipped square tube is stably placed within the first support block 8 for printing operations, meeting various usage requirements.

[0056] To better demonstrate the servo-driven lifting and feeding method for printing characters on square tubes, this embodiment discloses a servo-driven lifting and feeding method for printing characters on square tubes, including the following steps:

[0057] Step 1: The tipping rod 2 drives the outer tipping plate 3 and the receiving plate 301 to rotate, so that the tipping plate 3 and the receiving plate 301 cooperate to stably transport the square tube on the first conveying wheel assembly 1 to the bearing carriage 4, reducing the collision force;

[0058] Step 2: The inclined bearing carriage 4 conveys the square tube to the right. Then, the chain plate conveyor 5 drives the multi-group material distribution plates 501 and the baffles 502, which are evenly distributed on the outside, to rotate together. The material distribution plates 501 and the baffles 502 cooperate to lift and flip a square tube on the upper right side of the bearing carriage 4.

[0059] Step 3: The sprocket assembly 61 first drives the moving frame 10, the first electric push rod 11 and the two first lifting loading blocks 7 to move to the left. Then the first electric push rod 11 drives the two first lifting loading blocks 7 to move upward. Then the sprocket assembly 61 drives the moving frame 10, the first electric push rod 11 and the two first lifting loading blocks 7 to move to the right. The first electric push rod 11 drives the two first lifting loading blocks 7 to move downward. The two first lifting loading blocks 7 then move to the left. This operation is repeated so that the two first lifting loading blocks 7 lift the flipped square tubes on the chain plate conveyor mechanism 5 into the first bearing block 8 and the second conveyor wheel assembly 9 in the support conveyor assembly.

[0060] Step 4: Finally, the second conveyor wheel assembly 9 rotates to convey the square tube, and the printing assembly above performs the printing operation.

[0061] Example 2: Based on Example 1, this example also provides another servo-driven walking lifting-type feeding machine for printing on square tubes. It discloses a different structure for the flipping plate 3, which avoids friction between the square tube and the flipping plate 3 when the flipping plate 3 rotates, further protecting the square tube. See attached diagram for the specific structure. Figures 9-10 As shown, a guide rod 303 is installed in the groove on one side of the flipping plate 3 near the receiving plate 301. A counterweight slider 305 is slidably connected to one end of the guide rod 303. A reset spring 304 is nested on the other end of the guide rod 303. A temporary plate 302 in the shape of a mirror "L" is fixed on the top of the counterweight slider 305.

[0062] In the above technical solution, when the tipping rod 2 drives the three sets of tipping plates 3 and the receiving plate 301 on the outside to rotate, the rotation of one of the tipping plates 3 causes the square tube on the first conveying wheel assembly 1 to move upward together, so that the square tube separates from the first conveying wheel assembly 1. At this time, the square tube is on the mirror-shaped "L" temporary plate 302. When the tipping plate 3 rotates from a horizontal state to a vertical state, the gravity of the counterweight slider 305 causes the temporary plate 302 and the square tube above it to slide together towards the tipping rod 2. The counterweight slider 305 slides on the outside of the guide rod 303. The return spring 304 is compressed and stored, so when the square tube slides on the flipping plate 3 towards the flipping rod 2, the square tube and the temporary plate 302 are in a relatively stationary state during this process. Therefore, the square tube can avoid friction with the flipping plate 3 when it moves, which can further protect the square tube. Then the flipping plate 3 flips the square tube onto the shorter receiving plate 301, and the square tube slides on the receiving plate 301. At this time, the outer protrusion of the "L"-shaped receiving plate 301 blocks the square tube, preventing the square tube from separating from the receiving plate 301 before it contacts the bearing slide 4.

[0063] Example 3: Based on Examples 1 and 2, this example also provides another servo-driven walking lifting and feeding machine for printing on square tubes, disclosing a different structure of the lifting and feeding mechanism and the surface adjustment component. For details, please refer to the attached document. Figures 11-15 and Figure 17 As shown, the lifting and feeding mechanism includes a second lifting and feeding frame 12 installed above the first electric push rod 11. The upper part of the second lifting and feeding frame 12 is U-shaped, and the inner sidewall of the upper part of the second lifting and feeding frame 12 is inclined. The support and conveying assembly includes a second bearing block 13 and a third conveying wheel assembly 14 installed on the right side of the support frame 6. There are two sets of second bearing blocks 13, with two in each set. The space between the two sets of second bearing blocks 13 is provided with the third conveying wheel assembly 14. The second bearing block 13 is a "mountain" shaped structure, and the inner sidewall of the upper part of the second bearing block 13 is inclined. Two slots for placing the parallel tubes are opened on the upper part of the second bearing block 13.

[0064] In this embodiment, the chain conveyor mechanism 5, the material distribution plate 501, and the stop column 502 are not required. This not only simplifies the feeding process but also reduces the area occupied by the entire feeding machine and the manufacturing cost. In this embodiment, in order to match and adapt to the shape and size of the second lifting feeding frame 12, the shape and size of the first bearing block 8 in Embodiment 1 are adapted to the shape and size of the second bearing block 13, and the shape and size of the second conveying wheel assembly 9 are adapted to the shape and size of the third conveying wheel assembly 14.

[0065] In the above technical solution, the motor on the outside of the support frame 6 drives the sprocket assembly 61 to rotate. The sprocket assembly 61 first drives the moving frame 10, the first electric push rod 11, and the second lifting and loading frame 12 to move to the left. When the second lifting and loading frame 12 moves to the position corresponding to the two square tubes on the upper right side of the bearing slide 4, the rotation of the sprocket assembly 61 stops, and the first electric push rod 11 is started to drive the second lifting and loading frame 12 to move upward. At this time, the triangular part on the top left side of the second lifting and loading frame 12 is inserted into the upper right side of the bearing slide 4 from right to left. Separate the second and third square tubes from the left. Then, the first and second square tubes from the right slide down the inclined surface of the inner side wall above the second lifting and feeding frame 12 into the groove opened above the second lifting and feeding frame 12, so that the second lifting and feeding frame 12 can lift two square tubes at a time. At this time, the wider side of the two square tubes in contact faces upward. Then, the sprocket assembly 61 rotates in the opposite direction, and the sprocket assembly 61 drives the moving frame 10, the first electric push rod 11 and the second lifting and feeding frame 12 to move to the right.

[0066] The mixing assembly includes a second electric push rod 15 installed in a slot inside the second lifting and feeding frame 12, and a top block 16 is fixed at the upper output end of the second electric push rod 15. The vertical center line of the top block 16 coincides with the vertical center line of the second lifting and feeding frame 12, and the upper part of the top block 16 is a rounded isosceles triangle, while the lower part of the top block 16 is rectangular.

[0067] In the above technical solution, the second electric push rod 15 inside the second lifting and feeding frame 12 is activated simultaneously. The output end of the second electric push rod 15 drives the top block 16, which is an isosceles triangle with rounded corners, to move upward. At this time, the top of the top block 16 pushes the two square tubes above, causing the two square tubes to rotate 90° synchronously. At this time, the narrower side of the square tube faces upward. Then, when the second lifting and feeding frame 12 moves to the position between the two adjacent sets of second bearing blocks 13, the rotation of the sprocket assembly 61 is stopped. At this time, the first electric push rod 11 is activated to drive the second lifting and feeding frame 12 to move downward, so that the second lifting... The square tubes on the feeding frame 12 fall into the two slots opened above the second support block 13 and into the third conveyor wheel assembly 14. The second support block 13 is set in a "mountain" shape. The upper inner side wall of the second support block 13 is set as an inclined surface. Rollers can also be installed inside the upper inner side wall of the second support block 13, so that the second support block 13 can well support and place the two square tubes after flipping. Then, the chain drives a row of third conveyor wheel assemblies 14 to rotate, so that the third conveyor wheel assembly 14 transports the square tubes. At this time, the printing assembly above moves downward through the cylinder to print on the narrower side of the square tube.

[0068] Pressure sensors 17 are installed in symmetrical slots on the inner side wall above the second lifting and feeding frame 12.

[0069] By installing a pressure sensor 17 on the inner wall of the second lifting and feeding frame 12, the side of the flipped square tube will contact the pressure sensor 17 and generate pressure, while the side of the unflipped square tube will not contact the pressure sensor 17. Therefore, the pressure sensor 17 can be used to further intelligently detect whether the square tube has been successfully flipped.

[0070] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A servo-driven, lifting-type feeding machine for printing characters on square tubes, comprising a first conveyor wheel assembly (1) and a tilting bar (2) mounted on its right side, characterized in that: A bearing carriage (4) is provided on the lower right side of the tipping rod (2), and a tipping assembly for conveying the square tube on the first conveying wheel assembly (1) to the bearing carriage (4) is installed on the outside of the tipping rod (2). A face adjustment assembly for adjusting the printed surface of the square tube is provided on the right side of the bearing carriage (4), and a support frame (6) is symmetrically provided on the right side of the bearing carriage (4). A sprocket assembly (61) is installed on the inner side of the support frame (6), and a moving frame (10) is installed on the outer side of the sprocket assembly (61). A first electric push rod (11) is installed through the inside of the moving frame (10), and a lifting and feeding mechanism is installed at the top of the first electric push rod (11). A support conveying assembly is installed on the right side of the support frame (6). The material turning assembly includes a turning plate (3) and a receiving plate (301) installed at equal intervals on the outside of the turning rod (2). The receiving plate (301) is set in an "L" shape. One end of the turning plate (3) and one end of the receiving plate (301) form a "V" shape structure. The length of the turning plate (3) is greater than the length of the receiving plate (301). The length of the turning plate (3) is greater than the longest distance between the turning rod (2) and the first conveying wheel assembly (1). The bearing slide (4) is set at an inclination. Multiple rows of rolling bearings are installed on the bearing slide (4). The right side of the bearing slide (4) is set in a mirror "L" shape. The mixing assembly includes a chain plate conveying mechanism (5) located on the right side of the bearing carriage (4), and a material distribution plate (501) and a baffle (502) are installed at equal intervals on the outer side of the chain plate conveying mechanism (5). A row of baffles (502) is provided on one side of the material distribution plate (501). The height of the material distribution plate (501) is greater than the height of the baffles (502). The outer side of the material distribution plate (501) is chamfered. The flipping plate (3) has a guide rod (303) installed in the groove on one side near the receiving plate (301). A counterweight slider (305) is slidably connected through one end of the guide rod (303). A reset spring (304) is nested on the other end of the guide rod (303). A temporary plate (302) in the shape of a mirror "L" is fixed on the top of the counterweight slider (305). The lifting and feeding mechanism includes a second lifting and feeding frame (12) installed above the first electric push rod (11), and the upper part of the second lifting and feeding frame (12) is U-shaped, and the upper inner wall of the second lifting and feeding frame (12) is inclined. The support conveying assembly includes a second bearing block (13) and a third conveying wheel assembly (14) installed on the right side of the support frame (6). The second bearing block (13) is provided in two sets, with two in each set. The third conveying wheel assembly (14) is provided in the space between the two sets of second bearing blocks (13). The second bearing block (13) is provided in a "mountain" shaped structure. The upper inner sidewall of the second bearing block (13) is provided as an inclined surface. Two slots for placing the square tube are opened on the upper part of the second bearing block (13). The mixing assembly includes a second electric push rod (15) installed in a slot inside the second lifting and feeding frame (12), and a top block (16) is fixed at the upper output end of the second electric push rod (15). The vertical center line of the top block (16) coincides with the vertical center line of the second lifting and feeding frame (12), and the upper part of the top block (16) is a rounded isosceles triangle, and the lower part of the top block (16) is rectangular.

2. The servo-driven walking lifting feeding machine for printing on square tubes according to claim 1, characterized in that: The lifting and feeding mechanism includes two first lifting and feeding blocks (7) installed above the first electric push rod (11), and the upper part of the first lifting and feeding block (7) is set in a "U" shape, and the upper inner side wall of the first lifting and feeding block (7) is set as an inclined surface.

3. A servo-driven, lifting-type feeding machine for printing characters on square tubes according to claim 2, characterized in that: The support conveying assembly includes a first bearing block (8) and a second conveying wheel assembly (9) installed on the right side of the support frame (6). The first bearing block (8) is provided in two sets, with four in each set. The second conveying wheel assembly (9) is provided in the space between the two sets of first bearing blocks (8). The first bearing block (8) and the first lifting and feeding block (7) have the same shape and size. The inner side of the support frame (6) is slidably connected to the moving frame (10) through a guide rail.

4. A servo-driven walking lifting feeder for printing on square tubes according to claim 3, characterized in that: Pressure sensors (17) are installed in symmetrical slots on the upper inner side wall of the second lifting and feeding frame (12).

5. A servo-driven, lifting-type feeding method for printing characters on square tubes, applied to the servo-driven, lifting-type feeding machine according to any one of claims 2-3, characterized in that: Includes the following steps: S1: The tipping rod (2) drives the outer tipping plate (3) and the receiving plate (301) to rotate, so that the tipping plate (3) and the receiving plate (301) cooperate to stably transport the square tube on the first conveying wheel assembly (1) to the bearing carriage (4) and reduce the collision force; S2: The inclined bearing carriage (4) feeds the square tube to the right. Then the chain plate conveyor (5) drives the multi-group material distribution plates (501) and the baffle (502) distributed at equal intervals on the outside to rotate together. The material distribution plates (501) and the baffle (502) cooperate to lift and flip a square tube on the upper right side of the bearing carriage (4). S3: The sprocket assembly (61) first drives the moving frame (10), the first electric push rod (11) and the two first lifting loading blocks (7) to move to the left. Then the first electric push rod (11) drives the two first lifting loading blocks (7) to move upward. Then the sprocket assembly (61) drives the moving frame (10), the first electric push rod (11) and the two first lifting loading blocks (7) to move to the right. The first electric push rod (11) drives the two first lifting loading blocks (7) to move downward. Then the two first lifting loading blocks (7) move to the left. This operation is repeated so that the two first lifting loading blocks (7) lift the flipped square tube on the chain plate conveyor (5) into the first bearing block (8) and the second conveyor wheel assembly (9) in the support conveyor assembly. S4: Finally, the second conveyor wheel assembly (9) rotates to convey the square tube, and the printing assembly above performs the printing operation.

Images