A license plate stamping machine convenient to maintain

Abstract

The application discloses a license plate hot stamping machine convenient to maintain, which comprises a workbench (1), an automatic feeding and discharging system (2), a split type conveying system (3), a self-cleaning mechanism (4) and a hot stamping assembly (5) are sequentially arranged on the workbench (1) along a license plate processing flow, the automatic feeding and discharging system (2) is arranged at the feeding end and the discharging end of the split type conveying system (3) and is used for realizing automatic feeding and discharging of the license plate. Through the split type conveying system and the adjustable hot stamping assembly, the components can be conveniently disassembled and maintained, and the equipment maintenance cost is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of license plate hot stamping equipment, and in particular to a license plate hot stamping machine that is easy to maintain. Background Technology

[0002] A license plate hot stamping machine heats an upper rubber roller using a heating unit, and then transfers and fixes the hot stamping film onto the license plate surface using the rolling action between the upper rubber roller and the lower steel roller, thus achieving hot stamping. One existing hot stamping machine, for example, Chinese utility model patent CN223187218U, discloses a manual hot stamping mechanism, including a worktable, an unwinding roller, a rewinding roller, and a hot stamping assembly. The hot stamping assembly is located between the unwinding roller and the rewinding roller, both of which are rotatably connected to the worktable. It also includes a conveyor belt. A first conveyor roller and a second conveyor roller are rotatably connected to both ends of the worktable, and the conveyor belt is tensioned by the first and second conveyor rollers. A support plate is fixedly connected to the worktable, supporting the conveyor belt and located between the conveyor belt and the hot stamping assembly.

[0003] However, existing hot stamping mechanisms have maintenance pain points. As the core execution components of hot stamping processing, the conveyor mechanism and hot stamping roller assembly are among the components with the highest wear frequency and require frequent maintenance due to long-term dynamic friction and high-temperature working environment. However, the existing structure has shortcomings in terms of maintenance requirements: On the one hand, the conveyor mechanism mainly adopts an integral long conveyor belt structure. If there is a problem with the conveyor belt, the entire conveyor mechanism needs to be disassembled, which is cumbersome, difficult to disassemble and assemble, and time-consuming. On the other hand, for the hot stamping roller assembly, the fixed support plate cannot be flexibly adjusted according to the wear of the conveyor belt or the conveying requirements of license plate substrates of different thicknesses. After long-term use, if gaps appear between the conveyor belt and the support plate, it is easy to cause shaking during the conveying of the license plate substrate, affecting the accuracy of the hot stamping position. It may be necessary to replace some vulnerable parts regularly, increasing the later maintenance costs. Summary of the Invention

[0004] The purpose of this invention is to provide a license plate hot stamping machine that is easy to maintain. This invention utilizes a split-type transmission system and adjustable hot stamping components, enabling convenient disassembly and maintenance of parts and effectively reducing equipment maintenance costs.

[0005] The technical solution of the present invention: a license plate hot stamping machine that is easy to maintain, including a worktable, wherein an automatic loading and unloading system, a split-type transmission system, a self-cleaning mechanism and a hot stamping component are arranged sequentially along the license plate processing flow on the worktable. The automatic loading and unloading system is set at the feeding end and the discharging end of the split-type transmission system to realize the automatic loading and unloading of license plates.

[0006] The split-type transmission system includes a feeding rack, a hot stamping rack, and an unloading rack arranged sequentially on the workbench according to the license plate transmission direction. A self-cleaning mechanism is arranged above the feeding rack, and a hot stamping component is arranged above the hot stamping rack. The feeding rack receives the license plate grabbed by the automatic loading and unloading system and transmits the license plate sequentially through the self-cleaning mechanism and the hot stamping component until it is sent to the unloading rack.

[0007] The self-cleaning mechanism includes a license plate cleaning roller and an adhesive roller. The adhesive roller relies on its own weight to stick tightly to the license plate cleaning roller to achieve real-time self-cleaning.

[0008] The hot stamping assembly includes a fixed bracket located at the rear of the split-type transport system. The fixed bracket is equipped with a movable hot stamping component. Film material assemblies for mounting the hot stamping film are located on both sides of the fixed bracket. The fixed bracket is equipped with a mechanical adjustment assembly for adjusting the working height of the hot stamping frame. The hot stamping component is equipped with a rotatable and openable roller protective cover.

[0009] In the aforementioned easy-to-maintain license plate hot stamping machine, the automatic loading and unloading system includes a loading component and an unloading component with identical structures. Both the loading component and the unloading component include a mechanism fixing frame located on the rear side of the split-type transmission system. The mechanism fixing frame is equipped with a rodless cylinder. The translation end of the rodless cylinder is equipped with a lifting cylinder. The lifting end of the lifting cylinder is equipped with a suction cup component for adsorbing the license plate.

[0010] In the aforementioned easy-to-maintain license plate hot stamping machine, the feeding frame is equipped with a drawer-type feeding conveyor belt unit, the hot stamping frame is equipped with an auxiliary transmission roller that cooperates with the hot stamping component, and the discharging frame is equipped with an discharging conveyor belt. The conveying surfaces of the feeding conveyor belt unit, the auxiliary transmission roller, and the discharging conveyor belt are flush with and higher than the upper surface of the corresponding frame.

[0011] In the aforementioned easy-to-maintain license plate hot stamping machine, the hot stamping component includes a longitudinally movable roller seat connected to a fixed bracket via an elastic element. The roller seat is provided with a main plate and a secondary plate. A hot stamping motor support is provided on one side of the secondary plate. A drive motor is provided on the hot stamping motor support. The output end of the drive motor is connected to a rotating shaft. A first bearing seat is installed on one side of the main plate. A second bearing seat passes through the main plate and the secondary plate. One end of the second bearing seat is in close contact with one end of the first bearing seat. The rotating shaft passes through the first bearing seat and the second bearing seat. One end of the rotating shaft is connected to the hot stamping roller via a key.

[0012] In the aforementioned easy-to-maintain license plate hot stamping machine, the hot stamping roller includes a roller body disposed at one end of a rotating shaft, and a balancing component located inside the roller body is provided on the end face of the rotating shaft.

[0013] In the aforementioned easy-to-maintain license plate hot stamping machine, the film material assembly includes a feeding rod group and a receiving rod group located on the rear side of the split-type transmission system. The receiving rod group includes a main support frame connected to the split-type transmission system. A receiving motor is provided on the main support frame, and the output end of the receiving motor is connected to a receiving rod that passes through the main support frame.

[0014] In the aforementioned easy-to-maintain license plate hot stamping machine, the mechanical adjustment assembly includes a main adjustment assembly and a right-angle seat located on the front side of the fixed bracket, a fine adjustment support plate located on the rear side of the fixed bracket, a fine adjustment mechanism located on the fine adjustment support plate, a steering assembly located at the transmission end of the fine adjustment mechanism, a transmission self-locking assembly located at the driven end of the steering assembly, the upper end of the driven part of the transmission self-locking assembly being connected to the end of the main adjustment assembly via a thread, and the lower end of the self-locking assembly abutting against the right-angle seat.

[0015] In the aforementioned easy-to-maintain license plate hot stamping machine, the main adjustment component includes a main adjustment bracket disposed on the front side of the fixed bracket. A linkage block is hinged to the upper end of the main adjustment bracket, an adjustment lever is hinged to one end of the linkage block, and a linkage rod is connected to the end of the linkage block. An internal threaded sleeve connected to the transmission self-locking component is passed through the lower end of the main adjustment bracket, and the upper end of the internal threaded sleeve is hinged to the linkage rod.

[0016] In the aforementioned easy-to-maintain license plate hot stamping machine, the fine-tuning mechanism includes a fine-tuning limit block connected to the fine-tuning support plate, a fine-tuning main rod connected to the fine-tuning limit block via a bearing, and a fixing knob for locking the fine-tuning main rod on the fine-tuning limit block; one end of the fine-tuning main rod is connected to the steering assembly via a universal joint.

[0017] In the aforementioned easy-to-maintain license plate hot stamping machine, the transmission self-locking assembly includes a square frame, within which a main gear shaft and a secondary gear shaft are arranged at 90° angles. The main gear shaft is provided with a main drive gear, and the secondary gear shaft is provided with a secondary drive gear. The main drive gear and the secondary drive gear mesh with each other. The upper end of the secondary gear shaft is connected to an internal threaded sleeve via a thread, and the lower end of the secondary gear shaft abuts against a right-angle seat.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. This invention divides the license plate conveying mechanism into an infeed rack, a hot stamping rack, and an outfeed rack. When a section of the conveying structure malfunctions, only the faulty section needs to be disassembled and maintained, without disassembling the entire conveying system, greatly simplifying maintenance procedures. When maintaining the hot stamping components, the rotatable roller guard can be quickly opened without disassembly, allowing workers to directly access the hot stamping parts for inspection and replacement. The mechanical adjustment components on the fixed bracket can flexibly adjust the working height of the hot stamping rack, compensating for height according to conveyor belt wear to prevent license plate conveying sway from affecting hot stamping accuracy, and adapting to license plate substrates of different thicknesses. Compared to existing equipment that requires frequent replacement of conveyor belts and rollers due to non-adjustable support plates, this invention reduces the frequency of replacement of vulnerable parts and significantly lowers subsequent maintenance costs.

[0020] 2. The automatic loading and unloading system is correspondingly set at the feeding end and the discharging end of the split-type transmission system. The rodless cylinder and the lifting cylinder control the direction of license plate movement, and the suction cup assembly adsorbs the license plate. On the one hand, it realizes the automated coordination of license plate transmission and loading and unloading, improves the automation level of license plate loading and unloading, and ensures the accuracy of license plate positioning. On the other hand, it reduces the damage to components caused by human error, and indirectly reduces the frequency of equipment failure and maintenance requirements.

[0021] 3. The self-cleaning mechanism, through the design of the adhesive roller relying on its own weight to adhere tightly to the license plate cleaning roller, can simultaneously remove dust and impurities adsorbed on the surface of the cleaning roller, without the need to stop the machine to disassemble the cleaning roller for manual cleaning, thus realizing the cleaning roller's maintenance while working. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 A schematic diagram of a split-type transmission system;

[0024] Figure 3 This is a schematic diagram of the feed conveyor belt unit;

[0025] Figure 4 This is a schematic diagram of the auxiliary drive roller;

[0026] Figure 5 This is a schematic diagram of a self-cleaning mechanism;

[0027] Figure 6 This is a schematic diagram of an automatic loading and unloading system;

[0028] Figure 7 This is a schematic diagram of the suction cup assembly;

[0029] Figure 8 This is a schematic diagram of a hot stamping part;

[0030] Figure 9 This is a schematic diagram of the motherboard;

[0031] Figure 10 This is a schematic diagram of the rotating shaft;

[0032] Figure 11 This is a schematic diagram of the balancing component;

[0033] Figure 12 This is a schematic diagram of the membrane material assembly;

[0034] Figure 13 A schematic diagram of the mechanical adjustment components;

[0035] Figure 14 A schematic diagram of the main component;

[0036] Figure 15 This is a schematic diagram of the fine-tuning mechanism;

[0037] Figure 16 This is a schematic diagram of a transmission self-locking assembly.

[0038] Explanation of markings in the attached diagram: 1-Workbench, 2-Automatic loading and unloading system, 3-Separate conveyor system, 4-Self-cleaning mechanism, 5-Hot stamping assembly, 6-Feeding rack, 7-Hot stamping rack, 8-Discharge rack, 9-License plate cleaning roller, 10-Adhesive roller, 11-Fixed bracket, 12-Hot stamping part, 13-Film material assembly, 14-Mechanical adjustment assembly, 15-Roller protective cover, 16-Feeding assembly, 17-Discharge assembly, 1 8-Mechanism fixing frame, 19-Rodless cylinder, 20-Lifting cylinder, 21-Suction cup assembly, 211-Intermediate block, 212-Suction cup fixing plate, 213-Suction cup rod, 214-Suction cup head, 22-Feeding conveyor belt unit, 221-Transverse plate, 222-I-beam frame, 223-Side plate, 224-Feeding conveyor belt, 225-Rib seat, 226-Support shaft, 23-Auxiliary transmission roller, 24-Output Material conveyor belt, 25-roller seat, 26-main board, 27-sub-board, 28-hot stamping motor support, 29-drive motor, 30-shaft, 31-first bearing seat, 32-second bearing seat, 33-hot stamping roller, 34-roller body, 35-balance component, 36-feeding rod assembly, 37-receiving rod assembly, 38-main support frame, 39-receiving motor, 40-receiving rod, 41-main adjustment assembly, 42-right angle seat, 43- 44-Fine adjustment support plate, 45-Fine adjustment mechanism, 46-Steering assembly, 47-Transmission self-locking assembly, 48-Main adjustment bracket, 49-Linkage block, 50-Adjusting swing arm, 51-Linkage rod, 52-Internal threaded sleeve, 53-Fine adjustment limit block, 54-Fine adjustment main rod, 55-Fixing knob, 56-Square frame, 57-Main gear shaft, 58-Secondary gear shaft, 59-Main transmission gear, 60-Side upright plate. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0040] Example: A maintenance-friendly license plate hot stamping machine includes a worktable 1. Along the license plate processing flow, an automatic loading and unloading system 2, a separate conveyor system 3, a self-cleaning mechanism 4, and hot stamping components 5 are sequentially installed on the worktable 1, as shown in the attached diagram. Figure 1 As shown, the automatic loading and unloading system 2 is installed at the inlet and outlet ends of the split-type transmission system 3, as per the attached diagram. Figure 6 As shown, the automatic loading and unloading system 2 is used to realize the automatic loading and unloading of license plates. The automatic loading and unloading system 2 includes a loading component 16 and an unloading component 17 with the same structure. Both the loading component 16 and the unloading component 17 include a mechanism fixing frame 18 set on the rear side of the split transmission system 3. The mechanism fixing frame adopts a trapezoidal main body design. The trapezoidal structure has both excellent load-bearing performance and anti-deformation ability. The bottom folded edge is firmly connected to the side of the license plate conveying mechanism through multiple sets of bolts. The top folded edge provides a horizontal installation reference for the rodless cylinder, ensuring the stability of the cylinder's translation and lifting actions during the loading and unloading process and avoiding the displacement of the license plate. A rodless cylinder 19 is installed on the mechanism fixing frame 18. A lifting cylinder 20 is installed on the translation end of the rodless cylinder 19. A suction cup component 21 for adsorbing the license plate is installed on the lifting end of the lifting cylinder 20. The rodless cylinder enables precise lateral translation of the license plate along the conveying mechanism, while the lifting cylinder completes the vertical lifting and placement of the license plate. The suction cup assembly 21 includes an intermediate block 211 connected to the lifting end of the lifting cylinder, as shown in the attached figure. Figure 7 As shown, a suction cup fixing plate 212 is connected to the bottom of the middle block 211. The middle block 211 is connected to the suction cup fixing plate 212 by screws. The suction cup fixing plate 212 is connected to a suction cup rod 213 by bolts. The end of the suction cup rod 213 has a suction cup head 214. There are a pair of suction cup rods, and each suction cup rod has a suction cup head at its end. There are four sets in total, corresponding to the four corners of the license plate. The upper end of the suction cup head has a nut. Tightening the nut will make the nut fit tightly against the suction cup rod, thereby fixing the suction cup head. The adjusting horizontal grooves on both sides of the suction cup fixing plate can slide to adjust the lateral spacing of the suction cup rods as needed. The spacing between the suction cup heads is effectively adjusted. This structure can adapt to license plates of different widths. The long through groove on the suction cup rod can adjust the position of the suction cup head in the length direction of the license plate. This structure can adapt to license plates of different lengths. The dual adjustment structure can adapt to different specifications of license plates. To better ensure stable loading and unloading of license plates, support platforms are installed on the workbench next to the infeed and discharge ends of the split-type transmission system 3, respectively, to facilitate the placement of license plates.

[0041] The split-type transmission system 3 includes a feeding rack 6, a hot stamping rack 7, and an output rack 8, arranged sequentially on the workbench 1 according to the license plate transmission direction, as shown in the attached diagram. Figure 2As shown, the self-cleaning mechanism 4 is located above the feeding rack 6, and the hot stamping assembly 5 is located above the hot stamping rack 7. The feeding rack 6 receives the license plate grabbed by the automatic loading and unloading system 2 and sequentially transfers the license plate through the self-cleaning mechanism 4 and the hot stamping assembly 5 until it is delivered to the unloading rack 8. A drawer-type feeding conveyor belt unit 22 is installed inside the feeding rack 6, as shown in the attached diagram. Figure 3 As shown, it includes a pair of transverse plates 221 disposed inside the feed rack 6. The transverse plates 221 are provided with I-beams 222. The I-beams 222 are mounted with symmetrically arranged side plates 223. The side plates 223 are mounted with a feed conveyor belt 224. The inner transverse plates 221 are mounted with symmetrical rib seats 225. The outer side of the side plates is mounted with a support shaft 226 passing through the rib seats. When the feeding conveyor belt unit is running, the tension of the conveyor belt itself, the weight of the license plate, and the vibration of operation will generate multi-directional loads. The I-beam can evenly transfer these loads to the transverse plate below, avoiding local stress concentration that could lead to deformation of the support structure and ensuring that the feeding conveyor belt unit always maintains a stable installation posture. When the feeding conveyor belt is running, the conveyor belt will generate outward lateral tension on the side plate. If the connection between the I-beam and the bottom of the side plate is relied on, the side plate is prone to tilting outward or shifting to the left or right, causing the conveyor belt to loosen and deviate. The support shaft is connected through the outer side of the side plate and the rib seat, which is equivalent to providing a transverse positioning pin for the side plate, limiting the displacement of the side plate in the transverse direction (perpendicular to the transmission direction), ensuring that the side plate is always parallel to the transmission direction, and avoiding conveyor belt problems caused by side plate deviation. An auxiliary drive roller 23, which cooperates with the hot stamping assembly 5, is installed inside the hot stamping frame 7. The auxiliary drive roller is installed in the hot stamping frame using a longitudinally adjustable structure. The side of the hot stamping frame has a longitudinal adjustment groove, which is designed as a long strip, providing adjustment space for the bearing seat of the auxiliary drive roller to slide longitudinally (in the height direction). When processing license plates of different thicknesses, changing the type of hot stamping film, or adjusting the hot stamping pressure, the operator can precisely adjust the rolling gap between the auxiliary drive roller and the hot stamping roller in the hot stamping assembly by moving the bearing seat along the adjustment groove. An output conveyor belt 24 is installed inside the output frame 8. The transmission surfaces of the feed conveyor belt unit 22, the auxiliary drive roller 23, and the output conveyor belt 24 are flush with and higher than the corresponding upper surface of the frame, as shown in the attached diagram. Figure 4 As shown; the bottom of the three frames has bent edges with fixing holes. Fixing bolts are installed in the fixing holes to ensure a stable connection with the worktable. The feeding rack, hot stamping rack and the discharging rack fit together in sequence. Connecting plates are installed between the frames to ensure the stability of the connection between the frames.

[0042] The specific operating state of the split-type transmission system is as follows: The license plate to be hot-stamped is placed at the beginning of the feeding conveyor belt unit by the feeding component. The feeding conveyor belt unit, driven by the drive component, transports the license plate along the transmission direction. After the license plate enters the hot-stamping frame, the transmission responsibility is transferred from the feeding conveyor belt unit to the auxiliary drive roller. After the hot-stamped license plate is removed from the hot-stamping frame outlet, it enters the coverage area of ​​the discharge conveyor belt. Then, the unloading component removes the hot-stamped license plate.

[0043] The self-cleaning mechanism 4 includes a license plate cleaning roller 9 and an adhesive roller 10, as shown in the attached figure. Figure 5 As shown, the license plate cleaning roller mainly consists of a shaft and a sponge sleeve. The adhesive roller 10 relies on its own weight to adhere tightly to the license plate cleaning roller 9 to achieve real-time self-cleaning. The self-cleaning mechanism 4 also includes two side plates 60, which are set on the side of the feed rack. The side plates have L-shaped grooves, and the end of the shaft of the license plate cleaning roller is locked in the L-shaped groove. When the license plate is conveyed forward, the sponge sleeve contacts the license plate and wipes the dirt on the surface of the license plate. The structure of the L-shaped groove allows for quick disassembly or adjustment of the fit between the cleaning roller and the conveying surface, facilitating the maintenance or replacement of the cleaning roller. The upper end of the side plate has a shaft slot. The adhesive roller includes a fixed shaft set in the shaft slot. A removable glue roll is sleeved on the fixed shaft, and the glue roll is tightly attached to the license plate cleaning roller. The shaft bayonet is a longitudinal groove structure. The fixed shaft is mounted inside the shaft bayonet. The adhesive roller itself has a certain weight. When a new roll of adhesive is added to the fixed shaft, the end of the fixed shaft is located at the top of the shaft bayonet. When the adhesiveness of the roll decreases, the adhesiveness can be restored simply by peeling off the surface layer. As the diameter of the roll decreases, the fixed shaft will descend along the shaft bayonet, but the surface of the roll of adhesive will always be in contact with the surface of the license plate cleaning roller. The adhesive surface of the adhesive roller will always be in close contact with the license plate cleaning roller, and the adhesive roller is used to clean the license plate cleaning roller.

[0044] The hot stamping assembly 5 includes a fixed bracket 11 disposed on the rear side of the split-type transmission system 3, and a movable hot stamping element 12 is mounted on the fixed bracket 11, as shown in the attached figure. Figure 8 As shown, film material assemblies 13 for mounting hot stamping film are installed on both sides of the fixed bracket 11; a mechanical adjustment assembly 14 for adjusting the working height of the hot stamping frame 7 is installed on the fixed bracket 11, and a rotatable roller protective cover 15 is installed on the hot stamping part 12.

[0045] The hot stamping component 12 includes a longitudinally movable roller seat 25 connected to a fixed bracket 11 via an elastic element. A spring is provided between the rear side of the fixed bracket and the rear side of the roller seat. The roller seat 25 is provided with a main plate 26 and a secondary plate 27, as shown in the attached figure. Figure 9 As shown, a hot stamping motor support 28 is provided on one side of the sub-plate 27, and a drive motor 29 is provided on the hot stamping motor support 28. The output end of the drive motor 29 is connected to a rotating shaft 30, as shown in the attached figure. Figure 10As shown; a first bearing seat 31 is installed on one side of the main board 26, and a second bearing seat 32 is installed inside the main board 26 and the sub-board 27, with one end of the second bearing seat 32 in close contact with one end of the first bearing seat 31; a rotating shaft 30 is installed inside the first bearing seat 31 and the second bearing seat 32, and one end of the rotating shaft 30 is connected to a hot stamping roller 33 via a key. The hot stamping component forms a double-plate support structure through the main board and the sub-board, with bearing seats correspondingly installed inside the double plates. The rotating shaft is installed in the bearing seats, effectively enhancing the support rigidity and overall load-bearing capacity of the hot stamping roller assembly; the first bearing seat and the second bearing seat are in close contact, increasing the support area for the rotating shaft, effectively offsetting the torque generated by the long roller surface hot stamping roller due to its own weight and hot stamping pressure, avoiding the deflection deformation problem that is prone to occur in single-plate support, ensuring that the axis of the hot stamping roller always remains stable, and ensuring the uniformity of ultra-wide license plates during hot stamping. One end of the roller body protective cover is rotatably connected to the roller seat via a shaft, and the other end of the roller body protective cover is hinged to a cylinder. The fixed end of the cylinder is located at the rear of a fixed bracket. When the hot stamping roller is running, the cylinder retracts, causing the roller body protective cover to flip down and cover the hot stamping roller. The high temperature and high-speed rotation of the hot stamping roller during operation pose a double safety hazard to the operator: firstly, direct contact with the high-temperature roller body can easily cause burns; secondly, if clothing, gloves, or other items are caught in the rotating roller body, it may cause mechanical injury. The roller body protective cover can form a full-coverage isolation, blocking high-temperature radiation and preventing operators from accidentally touching and burning themselves. The hot stamping roller 33 includes a roller body 34 disposed at one end of a rotating shaft 30. A balance component 35 located inside the roller body 34 is provided on the end face of the rotating shaft 30. Figure 11 As shown; the balancing component includes a positioning pin set on the end face of the rotating shaft. The positioning pin is connected to the end face of the rotating shaft by threads. A radial block is fixed on the positioning pin. The radial block has an adjustment groove. A movable and adjustable balance rod is installed in the adjustment groove. The balance rod has a fixing nut. After the position of the balance rod is determined, the fixing nut is tightened to fix the balance rod. The balancing component can flexibly adjust the balance according to the running state of the long roller hot stamping roller. By moving the balance rod along the adjustment groove to different positions, the centrifugal force deviation when the roller rotates at high speed is effectively offset, reducing bearing wear and roller shaking caused by imbalance, and significantly extending the service life of core components such as hot stamping roller and bearing seat.

[0046] The film material assembly 13 includes a feeding rod group 36 and a receiving rod group 37 disposed on the rear side of the split-type conveying system 3, as shown in the attached figure. Figure 12As shown, the take-up rod assembly 37 includes a main support frame 38 connected to the split-type transmission system 3. A take-up motor 39 is mounted on the main support frame 38, and the output end of the take-up motor 39 is connected to a take-up rod 40 that passes through the main support frame 38. To ensure that the hot stamping film remains taut, tension rollers are installed on the front side of the fixed bracket and near the feed rod assembly, as well as on the front side of the support frame and below the take-up rod. The support bodies of the feed rod assembly and the take-up rod assembly are mainly located on the rear side of the hot stamping frame. The hot stamping film is rolled onto the shaft of the feed rod assembly, pulled out, passes over the two tension rollers, and finally wrapped around the take-up rod, with the hot stamping film adhering to the hot stamping roller.

[0047] The mechanical adjustment assembly 14 includes a main adjustment assembly 41 and a right-angle seat 42 disposed on the front side of the fixed bracket 11, a fine adjustment support plate 43 disposed on the rear side of the fixed bracket 11, a fine adjustment mechanism 44 disposed on the fine adjustment support plate 43, a steering assembly 45 disposed on the transmission end of the fine adjustment mechanism 44, and a transmission self-locking assembly 46 disposed on the driven end of the steering assembly 45. The upper end of the driven part of the transmission self-locking assembly 46 is connected to the end of the main adjustment assembly 41 by a thread, and its lower end abuts against the right-angle seat 42. Because the fixed bracket and the roller seat are connected by a spring, the lower end of the driven part of the transmission self-locking assembly always abuts against the right-angle seat. The main adjustment assembly 41 includes a main adjustment bracket 47 disposed on the front side of the fixed bracket 11, as shown in the attached figure. Figure 14 As shown, a linkage block 48 is hinged to the upper end of the main adjustment bracket 47. An adjusting swing rod 49 is hinged to one end of the linkage block 48, and a linkage rod 50 is connected to the end of the linkage block 48. An internal threaded sleeve 51 connected to the transmission self-locking assembly 46 is inserted through the lower end of the main adjustment bracket 47. The upper end of the internal threaded sleeve 51 is hinged to the linkage rod 50. When the main adjustment assembly is in use, the adjusting swing rod will swing, which will drive the linkage block to swing. Through the transmission of the linkage rod, the internal threaded sleeve will move up or down, which will drive the transmission self-locking assembly connected to the internal threaded sleeve to move up and down, thereby realizing the adjustment of the hot stamping roller. This allows for a wide range of coarse adjustment of the height of the hot stamping roller, adapting to different types of license plates that need to be hot stamped.

[0048] The fine-tuning mechanism 44 includes a fine-tuning limiting block 52 connected to the fine-tuning support plate 43, as shown in the attached figure. Figure 15As shown, a fine-tuning main rod 53 is connected to the fine-tuning limit block 52 via a bearing. The fine-tuning limit block 52 has a fixing knob 54 for locking the fine-tuning main rod 53. When the fine-tuning main rod is positioned after rotational adjustment, rotating the fixing knob causes its inner end to contact the surface of the fine-tuning main rod. One end of the fine-tuning main rod 53 is connected to the steering assembly 45 via a universal joint. The steering assembly includes a right-angle block containing a drive shaft and a driven shaft arranged at an angle. The drive shaft and driven shaft are connected via bevel gear transmission. One end of the drive shaft is connected to the fine-tuning main rod via a universal joint, and one end of the driven shaft is connected to the drive end of the transmission self-locking assembly. In the fine-tuning mechanism, rotating the fine-tuning main rod causes the drive shaft to rotate via an outward joint. The drive shaft and driven shaft are connected via bevel gear meshing. The rotation of the driven shaft transmits power to the transmission self-locking assembly, enabling its operation.

[0049] The transmission self-locking assembly 46 includes a square frame 55, as shown in the attached figure. Figure 16As shown, the square frame 55 contains a main gear shaft 56 and a secondary gear shaft 57 arranged at 90° angles. The main gear shaft 56 has a main drive gear 58, and the secondary gear shaft 57 has a secondary drive gear 59. The main drive gear 58 and the secondary drive gear 59 mesh with each other. The upper end of the secondary gear shaft 57 is threaded to an internal threaded sleeve 51, and the lower end of the secondary gear shaft 57 abuts against a right-angle seat 42. In the transmission self-locking assembly, the main gear shaft receives power from the driven shaft to rotate. The main drive gear on the main gear shaft meshes with the secondary drive gear on the secondary gear shaft, and the meshing has self-locking properties. After the secondary gear shaft rotates, its upper end connects to the internal threaded sleeve, and its lower end abuts against the right-angle seat. The rotation of the secondary gear shaft causes relative displacement to the fixed internal threaded sleeve, pushing the right-angle seat to move, thereby moving the roller seat. Simultaneously, the entire square frame moves accordingly. The transmission self-locking assembly uses the 90° staggered meshing of the main gear shaft and the auxiliary gear shaft, combined with the threaded connection structure between the auxiliary gear shaft and the internal threaded sleeve, to form a two-way self-locking mechanism: on the one hand, the reverse locking characteristic of the gear meshing can prevent the auxiliary gear shaft from rotating due to vibration during the hot stamping operation; on the other hand, the self-locking effect of the threaded connection can stably maintain the relative position of the internal threaded sleeve and the auxiliary gear shaft, ensuring the stability of the hot stamping roller height during continuous operation. When adapting to license plates of different thicknesses, the height of the hot stamping roller can be coarsely adjusted over a wide range using the main adjustment component. The operator holds the adjustment lever and swings it clockwise or counterclockwise. The adjustment lever is hinged to the linkage block, and the swinging motion causes the linkage block to rotate around the hinge point at the upper end of the main adjustment bracket. The other end of the linkage block is fixedly connected to the linkage rod, and the rotational motion is converted into the longitudinal pushing and pulling motion of the linkage rod. The lower end of the linkage rod is hinged to the internal threaded sleeve, and the pushing and pulling motion causes the internal threaded sleeve to move up and down along the longitudinal channel of the main adjustment bracket. The internal threaded sleeve causes the secondary gear shaft to move, and the displacement of the secondary gear shaft is indirectly transmitted to the roller seat. Combined with the elastic support force of the spring, the roller seat and the hot stamping roller move up and down synchronously, achieving a certain range of coarse adjustment and quickly reducing the initial distance between the hot stamping roller and the license plate surface to adapt to the basic height requirements of license plates of different thicknesses. For further fine-tuning, the operator observes the scale strip around the fine-tuning main rod on the outside of the fine-tuning limit block and rotates the fine-tuning main rod. The fine-tuning limit block is fixed to the fine-tuning support plate. One end of the fine-tuning main rod is connected to the drive shaft of the steering assembly via a universal joint. Inside the right-angle block of the steering assembly, the drive shaft and driven shaft are arranged at a 90° angle and mesh with bevel teeth to achieve vertical steering of the power direction, transmitting the rotation of the drive shaft to the driven shaft. The driven shaft is connected to the main gear shaft of the transmission self-locking assembly, driving the main gear shaft to rotate. The main drive gear on the main gear shaft and the secondary drive gear on the secondary gear shaft are interleaved at a 90° angle, converting the rotation of the main gear shaft into a slow rotation of the secondary gear shaft. Since the secondary gear shaft is threadedly connected to the internal threaded sleeve, and the lower end of the secondary gear shaft abuts against the right-angle seat and cannot move longitudinally, the rotation of the secondary gear shaft will drive the internal threaded sleeve to produce a slight rise and fall along the axial direction of the secondary gear shaft.Compared with hot stamping equipment on the market, this invention has the following advantages: 1. This invention can effectively improve the hot stamping quality, make operation more convenient, and make maintenance simpler. For the current situation of hot stamping equipment on the market, such as unstable hot stamping quality, complex equipment maintenance, and flammable hot stamping rollers, this invention adopts a brand-new mechanism to prevent and deal with the risk of hot stamping rollers overheating and burning; 2. The split belt, quick-connect heating connector, hot stamping roller pull-out disassembly, self-cleaning device, and hot stamping film are all fixed with a self-rotating expansion shaft (a shaft used to fix the hot stamping film roll and realize the tension adjustment of the film roll through its own rotation), which facilitates the maintenance of the equipment in the later stage.

[0050] The working principle of this invention is as follows: The rodless cylinder 19 of the feeding component 16 moves laterally along the mechanism fixing frame 18, and the lifting cylinder 20 drives the suction cup component 21 to rise and fall vertically. After adsorption, the suction cup component 21 is accurately delivered to the feeding rack 6. Similarly, the unloading component 17 picks up the license plate that has been hot-stamped at the end of the unloading rack 8. The feeding rack 6 receives the loaded license plate through the drawer-type feeding conveyor belt unit 22. The conveyor belt unit can be directly pulled out along the slide rail of the side plate of the I-beam frame. The surface of the conveyor belt contacts the license plate and conveys it forward. After the license plate enters the hot stamping rack 7, it is received and transported by the auxiliary transmission roller 23, which cooperates with the hot stamping roller 33 above to achieve rolling hot stamping. The hot-stamped license plate enters the unloading rack 8 and is sent to the gripping position of the unloading component 17 by the unloading conveyor belt 24. If maintenance is required, it is not necessary to disassemble the entire transmission system, but only the corresponding parts need to be disassembled. After the license plate enters the feed rack 6, it first passes through the license plate cleaning roller 9. At the same time, the adhesive roller 10 adheres tightly to the surface of the cleaning roller under its own weight, removing impurities adsorbed by the cleaning roller in real time. As the adhesive roll's stickiness decreases, only the surface layer needs to be peeled off to restore stickiness. When the diameter of the adhesive roll decreases, the fixed shaft naturally descends along the side vertical plate shaft, always maintaining its fit with the cleaning roller. There is no need to stop the machine to disassemble the cleaning roller for manual cleaning, achieving maintenance while working. During hot stamping, the cylinder retracts, causing the protective cover to flip down and wrap around the hot stamping roller 33. When maintenance is required, the cylinder extends and pushes the protective cover to rotate upward around the roller seat 25 shaft to open, directly exposing the hot stamping roller 33, bearing seat, and other core components. When it is necessary to adapt to license plates of different thicknesses, the height of the hot stamping roller 33 can be coarsely adjusted over a wide range by using the main adjustment component 41. The swing adjustment lever 49 moves the internal threaded sleeve 51 up and down through the linkage block 48 and linkage rod 50. The internal threaded sleeve 51 drives the secondary gear shaft 57 of the transmission self-locking component 46. The secondary gear shaft 57 pushes the right-angle seat 42 to move the roller seat 25 longitudinally, thus achieving a wide range of height adjustment for the hot stamping roller 33. For fine adjustment, the micro-adjustment main rod 53 is rotated, which drives the main gear shaft 56 to rotate through the universal joint and steering component 45. The main gear shaft 56 meshes with the secondary gear shaft 57 and rotates slowly. The secondary gear shaft 57 finely adjusts the height of the roller seat 25. Different working conditions can be adapted through mechanical adjustment, reducing the frequency of replacement of vulnerable parts.

Claims

1. A license plate hot stamping machine convenient to maintain, comprising a workbench (1), an automatic feeding and discharging system (2), a split transmission system (3), a self-cleaning mechanism (4) and a hot stamping assembly (5) are sequentially arranged on the workbench (1) along the license plate processing flow, characterized in that: The automatic loading and unloading system (2) is set at the feeding end and the discharging end of the split transmission system (3) to realize the automatic loading and unloading of license plates; The split-type transmission system (3) includes a feeding rack (6), a hot stamping rack (7) and an output rack (8) arranged sequentially on the workbench (1) in the direction of license plate transmission. A self-cleaning mechanism (4) is arranged above the feeding rack (6), and a hot stamping assembly (5) is arranged above the hot stamping rack (7). The feeding rack (6) is equipped with a drawer-type feeding conveyor belt unit (22). The hot stamping rack (7) is equipped with an auxiliary transmission roller (23) that cooperates with the hot stamping assembly (5). The output rack (8) is equipped with an output conveyor belt (24). The feeding rack (6) receives the license plate grabbed by the automatic loading and unloading system (2) and transmits the license plate sequentially through the self-cleaning mechanism (4) and the hot stamping assembly (5) until it is sent to the output rack (8). The self-cleaning mechanism (4) includes a license plate cleaning roller (9) and an adhesive roller (10). The adhesive roller (10) relies on its own weight to stick tightly to the license plate cleaning roller (9) to achieve real-time self-cleaning. The hot stamping assembly (5) includes a fixed bracket (11) located on the rear side of the split-type transmission system (3), a movable hot stamping component (12) is provided on the fixed bracket (11), and film material assemblies (13) for mounting the hot stamping film are provided on both sides of the fixed bracket (11); a mechanical adjustment assembly (14) for adjusting the working height of the hot stamping frame (7) is provided on the fixed bracket (11), and a rotatable roller protective cover (15) is provided on the hot stamping component (12). The hot stamping component (12) includes a hot stamping roller (33); the mechanical adjustment assembly (14) includes a main adjustment assembly (41) and a right-angle seat (42) disposed on the front side of the fixed bracket (11), a fine adjustment support plate (43) is provided on the rear side of the fixed bracket (11), a fine adjustment mechanism (44) is provided on the fine adjustment support plate (43), a steering assembly (45) is provided on the transmission end of the fine adjustment mechanism (44), a transmission self-locking assembly (46) is provided on the driven end of the steering assembly (45), the upper end of the driven part of the transmission self-locking assembly (46) is connected to the end of the main adjustment assembly (41) by a thread, and its lower end abuts against the right-angle seat (42); the main adjustment assembly (41) includes a main adjustment bracket (47) disposed on the front side of the fixed bracket (11), the main adjustment support... The upper end of the frame (47) is hinged to a linkage block (48), one end of the linkage block (48) is hinged to an adjusting swing rod (49), and the end of the linkage block (48) is connected to a linkage rod (50). The lower end of the main adjustment bracket (47) is provided with an internal threaded sleeve (51) connected to the transmission self-locking assembly (46), and the upper end of the internal threaded sleeve (51) is hinged to the linkage rod (50). The fine adjustment mechanism (44) includes a fine adjustment limit block (52) connected to the fine adjustment support plate (43). The fine adjustment limit block (52) is connected to the fine adjustment main rod (53) via a bearing. The fine adjustment limit block (52) has a fixing knob (54) for locking the fine adjustment main rod (53). One end of the fine adjustment main rod (53) is connected to the steering assembly (45) via a universal joint.

2. The easy-to-maintain license plate hot stamping machine according to claim 1, characterized in that: The automatic loading and unloading system (2) includes a loading component (16) and an unloading component (17) with the same structure. Both the loading component (16) and the unloading component (17) include a mechanism fixing frame (18) set on the rear side of the split transmission system (3). The mechanism fixing frame (18) is equipped with a rodless cylinder (19). The translation end of the rodless cylinder (19) is equipped with a lifting cylinder (20). The lifting end of the lifting cylinder (20) is equipped with a suction cup assembly (21) for adsorbing license plates.

3. The easy-to-maintain license plate hot stamping machine according to claim 1, characterized in that: The conveying surfaces of the feeding conveyor belt unit (22), the auxiliary drive roller (23), and the discharging conveyor belt (24) are flush with and higher than the upper surface of the corresponding frame.

4. The easy-to-maintain license plate hot stamping machine according to claim 1, characterized in that: The hot stamping component (12) also includes a longitudinally movable roller seat (25) connected to a fixed bracket (11) via an elastic element. The roller seat (25) is provided with a main plate (26) and a secondary plate (27). A hot stamping motor support (28) is provided on one side of the secondary plate (27). A drive motor (29) is provided on the hot stamping motor support (28). The output end of the drive motor (29) is connected to a rotating shaft (30). A first bearing seat (31) is installed on one side of the main plate (26). A second bearing seat (32) is passed through the main plate (26) and the secondary plate (27). One end of the second bearing seat (32) is in close contact with one end of the first bearing seat (31). The rotating shaft (30) passes through the first bearing seat (31) and the second bearing seat (32). One end of the rotating shaft (30) is connected to the hot stamping roller (33) via a key.

5. The easy-to-maintain license plate hot stamping machine according to claim 1, characterized in that: The hot stamping roller (33) includes a roller body (34) disposed at one end of a rotating shaft (30), and a balance member (35) located inside the roller body (34) is provided on the end face of the rotating shaft (30).

6. The easy-to-maintain license plate hot stamping machine according to claim 1, characterized in that: The film material assembly (13) includes a feeding rod group (36) and a receiving rod group (37) located on the rear side of the split-type transmission system (3). The receiving rod group (37) includes a main support frame (38) connected to the split-type transmission system (3). A receiving motor (39) is provided on the main support frame (38). The output end of the receiving motor (39) is connected to a receiving rod (40) that passes through the main support frame (38).

7. The easy-to-maintain license plate hot stamping machine according to claim 1, characterized in that: The transmission self-locking assembly (46) includes a square frame (55), which has a main gear shaft (56) and a secondary gear shaft (57) arranged at 90°. The main gear shaft (56) is provided with a main drive gear (58), and the secondary gear shaft (57) is provided with a secondary drive gear (59). The main drive gear (58) and the secondary drive gear (59) mesh with each other. The upper end of the secondary gear shaft (57) is connected to the internal thread sleeve (51) by a thread, and the lower end of the secondary gear shaft (57) abuts against the right angle seat (42).

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