A two-dimensional code laser engraving device

Abstract

The utility model provides a two -dimensional code laser engraves device relates to two -dimensional code engraving technical field, including base, the top of base is fixedly connected with the bottom plate, the top of bottom plate is fixedly connected with the support plate, the top of support plate is provided with laser printing equipment, the top of base is fixedly connected with the support frame, and the support frame is located below the bottom plate, the bottom of support frame is fixedly connected with the mounting plate, the top of mounting plate is fixedly connected with the rotary motor, the output of rotary motor is fixedly connected with the cross bar, and the end of cross bar is rotatably connected with the connecting rod, through the cooperation of base, support frame, mounting plate, rotary motor, cross bar, connecting rod, moving frame, limit rod and slide rod, make every product that flows in advance all be corrected to the predetermined center line when entering laser printing station, avoid the problem that two -dimensional code printing position is not uniform because of initial position deviation, greatly improved the consistency of product mark and the reading efficiency of subsequent automatic process.

Description

Technical Field

[0001] This utility model relates to the field of QR code engraving technology, specifically a QR code laser engraving device. Background Technology

[0002] In modern industrial production, especially on automated production lines, rapid and accurate product marking is a key link in achieving product traceability, quality control, and information management. Laser printing technology, with its advantages of permanent marking, high precision, no consumables, and non-contact operation, is widely used to print serial numbers, production dates, batch numbers, and QR codes on the surfaces of various products. Products are usually placed on a continuously running bottom conveyor belt and pass through the laser printing station one by one to complete the marking.

[0003] However, in actual production applications, the placement of products on the bottom conveyor belt before entering the laser printing station is uncertain. Due to errors in the feeding process, vibrations of the conveyor belt itself, or slight collisions between products, the lateral position of the products on the conveyor belt, i.e., perpendicular to the conveying direction, may be uneven, making it impossible to guarantee that all products are precisely on the same center line. This random deviation in position directly causes the laser spot to fall on the product surface to change accordingly, resulting in inconsistent positions of the printed QR codes or other markings on the products. This not only affects the appearance consistency of product batches, but more seriously, for subsequent processes that rely on automatic recognition by a vision system, QR codes with unfixed positions will significantly reduce the success rate of reading, and may even cause production line interruptions, severely impacting overall production efficiency. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a QR code laser engraving device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: It includes a base, a bottom plate fixedly connected to the top of the base, a support plate fixedly connected to the top of the bottom plate, a laser printing device mounted on the top of the support plate, a support frame fixedly connected to the top of the base, the support frame located below the bottom plate, a mounting plate fixedly connected to the bottom of the support frame, a rotary motor fixedly connected to the top of the mounting plate, a crossbar fixedly connected to the output end of the rotary motor, a connecting rod rotatably connected to the end of the crossbar, a movable frame rotatably connected to the end of the connecting rod away from the crossbar, and a limit rod fixedly connected to the top of the movable frame.

[0006] Preferably, a sliding rod is fixedly connected to the top of the support frame, and a slot is provided at the top of the sliding rod. The bottom of the movable frame is slidably connected to the sliding rod through the slot. By setting the slot and the sliding rod, a stable and torsion-resistant linear guide pair is formed, ensuring that the movable frame will not lift or deviate during the sliding process, making the centering action more stable and accurate.

[0007] Preferably, the movable frame is fixedly connected to a first conveyor plate via a limiting rod, and the movable frame is slidably connected to a second conveyor plate via the limiting rod. The bottom of the second conveyor plate has a slot, and the second conveyor plate is slidably connected to the limiting rod via the slot. The top of the first conveyor plate is rotatably connected to a threaded rod, and the outer wall of the threaded rod is threadedly connected to the top of the second conveyor plate. By setting the first conveyor plate, the second conveyor plate, the threaded rod, and the slot, it is convenient to adjust the distance between the first conveyor plate and the second conveyor plate.

[0008] Preferably, the top of the second conveyor plate is provided with a groove, and the second conveyor plate is slidably connected to a limit block through the groove. The end of the threaded rod away from the first conveyor plate is rotatably connected to the limit block. By setting the groove and the limit block, it is convenient to limit the movement angle of the second conveyor plate, so that the second conveyor plate and the threaded rod are always in a parallel state.

[0009] Preferably, a column is fixedly connected to the end of the second conveyor plate away from the first conveyor plate, and a roller is rotatably connected to the outer wall of the column. A belt is fitted to the outer wall of the roller. By setting up the column, roller, and belt, the friction between the first and second conveyor plates and the outer wall of the equipment can be reduced, thus avoiding damage to the outer wall of the equipment.

[0010] Preferably, a clamp is attached to the top of the end of the second conveyor plate near the column to limit the belt. By setting the clamp, the belt can be restricted and prevented from detaching from the first and second conveyor plates during rotation.

[0011] This invention provides a QR code laser engraving device. It has the following beneficial effects: By using the base, support frame, mounting plate, rotary motor, crossbar, connecting rod, moving frame, limit rod and sliding rod in combination, each product that flows through is corrected to the predetermined center line before entering the laser printing station, avoiding the problem of inconsistent QR code printing position caused by initial position deviation, and greatly improving the consistency of product identification and the reading efficiency of subsequent automated processes.

[0012] By setting up a first conveyor plate, a second conveyor plate, columns, rollers, and a belt, while the two limit rods adjust the product's centering, the product's sides do not directly contact the rigid rods, but rather the flexible belt. When the product moves laterally under the push of the limit rods, the interaction force between it and the belt causes the belt to roll on the rollers, reducing the risk of scratches and wear on the product's outer wall. Attached Figure Description

[0013] Figure 1 A schematic diagram of the overall structure of a QR code laser engraving device provided by this utility model; Figure 2 A schematic diagram of the support frame and related parts of a QR code laser engraving device provided by this utility model; Figure 3 A schematic diagram of the crossbar and related parts of a QR code laser engraving device provided by this utility model; Figure 4 A schematic diagram of the first conveyor plate and related parts of a QR code laser engraving device provided by this utility model.

[0014] Legend: 1. Base; 2. Base plate; 3. Support plate; 4. Laser printing equipment; 5. Support frame; 6. Mounting plate; 7. Rotary motor; 8. Crossbar; 9. Connecting rod; 10. Moving frame; 11. Limiting rod; 12. Sliding rod; 13. First conveyor plate; 14. Second conveyor plate; 15. Threaded rod; 16. Slot; 17. Slide groove; 18. Limiting block; 19. Column; 20. Roller; 21. Clamp; 22. Belt. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figure 1 Figure 2 and Figure 3As shown, a QR code laser engraving equipment includes a base 1, which is welded from high-strength carbon structural steel profiles and undergoes stress relief treatment. A base plate 2, milled from steel plate, is fixedly connected to the top of the base 1 using high-strength internal hexagonal head bolts, providing a precise installation reference for the upper structure. A support plate 3, vertically arranged thick steel plate, is fixedly connected to the top of the base plate 2 by welding. Triangular stiffeners can be welded to its back to further enhance its rigidity and prevent the micro-vibrations of the laser printing device 4 during operation from being transmitted to the support structure. The laser printing device 4 is mounted on the top of the support plate 3 via an adjustable mounting bracket, which typically includes a multi-dimensional adjustment slide and a locking mechanism for precise adjustment of the laser printing device 4's focal length and initial marking position. A support frame 5, constructed from welded rectangular steel tubing, is also fixedly connected to the other side of the top of the base 1 by bolts. The support frame 5 is located below the base plate 2, resulting in a compact overall structure and a reasonable center of gravity distribution. A mounting plate 6 is bolted to the bottom of the support frame 5. The mounting plate 6 is a hardened alloy steel plate, providing a sturdy base 1 to withstand the torque and vibration generated during motor operation. A rotary motor 7 is fixedly connected to the top of the mounting plate 6 via a flange connection. This rotary motor 7 is preferably a servo motor or stepper motor with braking function to achieve precise angular displacement control. A crossbar 8 is fixedly connected to the output end of the rotary motor 7 via a key connection. A connecting rod 9 is rotatably connected to the end of the crossbar 8 via a spherical bearing with a needle roller bearing. The end of the connecting rod 9 away from the crossbar 8 is also rotatably connected to a movable frame 10 via a spherical bearing. A limit rod 11 is fixedly connected to the top of the movable frame 10 via screws. The limit rod 11 is a hard chrome-plated optical shaft with high hardness, wear resistance, and corrosion resistance, ensuring that it is not easily worn during long-term use.

[0017] like Figure 1 Figure 2 and Figure 3 As shown, the top of the support frame 5 is bolted to a slide rod 12, the surface of which is ground to a mirror finish. A precise T-shaped slot is formed along the length of the top of the slide rod 12. The bottom of the movable frame 10 is formed by precision casting or machining into a T-shaped slider that perfectly fits the T-shaped slot. A self-lubricating composite material bushing can be embedded inside this slider, allowing the bottom of the movable frame 10 to form a high-precision sliding connection with the slide rod 12 through this T-shaped interface.

[0018] like Figure 3 and Figure 4As shown, the movable frame 10 is fixedly connected to the first conveyor plate 13 via a limiting rod 11 passing through its top. The movable frame 10 is slidably connected to the second conveyor plate 14 via the same pair of limiting rods 11. The bottom of the second conveyor plate 14 has a precisely milled groove 16, which is slidably connected to the limiting rod 11 via the groove 16. The fit clearance between the groove 16 and the limiting rod 11 must be strictly controlled to ensure smooth sliding while avoiding excessive clearance that could cause shaking. The top of the first conveyor plate 13 is rotatably connected to a threaded rod 15 via a pair of deep groove ball bearings. The outer wall of the threaded rod 15 is threadedly connected to the top of the second conveyor plate 14 via a matching trapezoidal threaded hole.

[0019] like Figure 3 and Figure 4 As shown, the top of the second conveyor plate 14 is machined with a groove 17 by wire cutting. The groove 17 is a rectangular through groove. The second conveyor plate 14 is slidably connected to the limit block 18 through the groove 17. The end of the threaded rod 15 away from the first conveyor plate 13 is rotatably connected to the limit block 18 through a pair of angular contact ball bearings. This bearing configuration can withstand bidirectional axial loads.

[0020] like Figure 4 As shown, a column 19 is fixedly connected to the end of the second conveyor plate 14 away from the first conveyor plate 13 by welding. The column 19 is a solid stainless steel bar. Rollers 20 are rotatably connected to the outer wall of the column 19 via a pair of precision rolling bearings. The rollers 20 are made of nylon or polyurethane coated material, ensuring sufficient friction without scratching the belt 22. The belt 22 is fitted against the outer wall of the rollers 20.

[0021] like Figure 4 As shown, the top of the second conveyor plate 14 near the column 19 is fitted with a clamp 21 by an interference fit or a snap-fit ​​structure. The opening of the clamp 21 is designed with a guide slope for easy installation, so that the clamp 21 can effectively limit the axial movement of the belt 22.

[0022] Working principle: During operation, the product moves to the laser printing station of the equipment via the main conveyor belt at the bottom, and the rotary motor 7 is activated. The rotary motor 7 rotates at a precise angle according to a preset program, causing the crossbar 8 to rotate synchronously. The rotation of the crossbar 8 is converted into two moving frames 10 moving in opposite directions along the T-shaped slide bar 12 via connecting rods 9 at both ends, realizing the conversion from rotational motion to precise linear motion. The moving frames 10 drive the two parallel limiting rods 11 at their top to move inward synchronously, clamping, straightening, and centering the product from both sides, ensuring that the product is precisely adjusted to the predetermined center line. This process is completed automatically, with a rapid response, replacing manual intervention and ensuring the uniformity of the position of each product before marking.

[0023] During the alignment process, the side of the product does not directly slide against the rigid limit rod 11, but first contacts the flexible belt 22 supported by the first conveyor plate 13 and the second conveyor plate 14. When the product needs to move laterally under the push of the limit rod 11, the static friction between its side and the belt 22 drives the belt 22 to roll around the roller 20 supported by the column 19. This ingenious design eliminates the harmful and damaging sliding friction that exists in traditional alignment mechanisms. The resistance of rolling friction is much smaller than that of sliding friction, making the alignment action smoother and less labor-intensive. Most importantly, it greatly reduces or even completely eliminates the risk of scratches and wear on the outer wall of the finished product, perfectly resolving the contradiction between alignment adjustment and product protection in automated production.

[0024] The equipment is adjustable for products of different widths. By rotating the threaded rod 15, the second conveyor plate 14 moves relative to the first conveyor plate 13 due to the action of the threaded pair and the guidance of the limiting block 18 in the slide groove 17, thereby changing the spacing between the two sets of belts 22 to accommodate different product sizes and expand the application range of the equipment.

[0025] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. 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 QR code laser engraving device, comprising a base (1), characterized in that, The base (1) is fixedly connected to a base plate (2), the base plate (2) is fixedly connected to a support plate (3), the support plate (3) is provided with a laser printing device (4), the base (1) is fixedly connected to a support frame (5), the support frame (5) is located below the base plate (2), the support frame (5) is fixedly connected to a mounting plate (6) at the bottom, the mounting plate (6) is fixedly connected to a rotary motor (7) at the top, the output end of the rotary motor (7) is fixedly connected to a crossbar (8), the end of the crossbar (8) is rotatably connected to a connecting rod (9), the end of the connecting rod (9) away from the crossbar (8) is rotatably connected to a movable frame (10), and the top of the movable frame (10) is fixedly connected to a limit rod (11).

2. The QR code laser engraving device according to claim 1, characterized in that: The top of the support frame (5) is fixedly connected to a slide rod (12), and the top of the slide rod (12) is provided with a slot. The bottom of the movable frame (10) is slidably connected to the slide rod (12) through the slot.

3. The QR code laser engraving device according to claim 1, characterized in that: The movable frame (10) is fixedly connected to the first conveyor plate (13) via the limiting rod (11). The movable frame (10) is slidably connected to the second conveyor plate (14) via the limiting rod (11). The bottom of the second conveyor plate (14) is provided with a slot (16). The second conveyor plate (14) is slidably connected to the limiting rod (11) via the slot (16). The top of the first conveyor plate (13) is rotatably connected to a threaded rod (15). The outer side wall of the threaded rod (15) is threadedly connected to the top of the second conveyor plate (14).

4. The QR code laser engraving device according to claim 3, characterized in that: The top of the second conveyor plate (14) is provided with a slide groove (17), and the second conveyor plate (14) is slidably connected to the limit block (18) through the slide groove (17). The end of the threaded rod (15) away from the first conveyor plate (13) is rotatably connected to the limit block (18).

5. The QR code laser engraving device according to claim 4, characterized in that: The second conveyor plate (14) is fixedly connected to a column (19) at one end away from the first conveyor plate (13). A roller (20) is rotatably connected to the outer side wall of the column (19), and a belt (22) is fitted to the outer side wall of the roller (20).

6. The QR code laser engraving device according to claim 5, characterized in that: The second conveyor plate (14) has a clamp (21) attached to the top of one end near the column (19) so that the clamp (21) limits the belt (22).

Images