A laser engraving apparatus adapted for multi-diameter tire mold sidewall plates

Abstract

The present application relates to the technical field of laser engraving, in particular to a laser engraving equipment suitable for tire sidewall plate of multiple diameter tire mold, comprising a bed, a crossbeam, a double-shaft moving module, a laser module, a horizontal moving distance measuring module, a rotary worktable, a plurality of clamping modules and a radial telescopic driving module; when the laser module performs avoidance action by horizontally moving away from its initial position, the radial telescopic driving module drives each clamping module to synchronously perform radial telescopic movement, and the horizontal avoidance moving distance of the laser module and the radial telescopic distance of the clamping module are in a proportional relationship; the present application forms a proportional matching relationship between the avoidance distance of the laser module and the diameter of the sidewall plate by setting the horizontal moving distance measuring module and the radial telescopic driving module, and simultaneously synchronously proportionally adjusts the clamping diameter of the clamping module with the horizontal avoidance distance of the laser module, greatly simplifies the preparation process before clamping of the sidewall plate, and significantly improves the overall processing efficiency of the equipment.

Description

Technical Field

[0001] This invention relates to the field of laser engraving technology, specifically to a laser engraving device adapted to the sidewalls of multi-diameter tire molds. Background Technology

[0002] Tire mold sidewalls are generally ring-shaped structures. Their end faces need to be machined with patterns, characters, exhaust grooves, and other structures corresponding to the tire sidewall. The machining accuracy of this type of structure directly determines the tire's appearance regularity, performance, and molding qualification rate. Laser engraving, with its advantages of non-contact processing, high processing accuracy, and adaptability to complex structure processing, has become the mainstream process for machining tire mold sidewall structures.

[0003] The existing tire mold sidewall laser engraving equipment mainly consists of a laser capable of horizontal movement and vertical lifting, a CNC control system, a rotary table, and a matching clamping mechanism. Due to the large weight of the tire sidewall itself, it needs to be hoisted to the rotary table by external hoisting equipment and fixed by the clamping mechanism during actual processing. To prevent the laser from interfering with the hoisting equipment and the tire sidewall during hoisting, it is usually necessary to control the laser to move horizontally to a clearance area and remove it from the working space above the rotary table. After the tire sidewall is clamped, the laser is reset to the initial position before the laser engraving operation can be started.

[0004] Currently, when performing horizontal avoidance maneuvers, the laser typically moves directly to the preset horizontal limit position of the equipment. However, in actual production, tire sidewalls come in various diameters. For larger diameter sidewalls, moving the laser to the horizontal limit position ensures sufficient lifting space and effectively prevents collisions or interference between the laser and the outer edge of the sidewall or external lifting equipment. However, for smaller diameter sidewalls, using the same method to move the laser to the horizontal limit position unnecessarily increases the laser's avoidance stroke and prolongs the subsequent adjustment time to the engraving station, ultimately leading to lower overall processing efficiency. Therefore, we propose a laser engraving device adapted to sidewalls of multi-diameter tire molds to effectively address these drawbacks. Summary of the Invention

[0005] The purpose of this invention is to provide a laser engraving device that is compatible with tire sidewalls of multi-diameter tire molds, in order to solve the problem mentioned in the background art that when the laser performs the avoidance action, it moves directly to the horizontal limit position and is not suitable for tire sidewalls of different diameters.

[0006] This invention is achieved through the following technical solution: a laser engraving device adapted to the sidewall of multi-diameter tire molds, comprising a bed, and further comprising: The crossbeam is fixedly mounted above the bed and extends horizontally. The dual-axis moving module is installed on the crossbeam, and the actuator can move horizontally along the length of the crossbeam and move vertically up and down. The laser module is installed at the actuator end of the dual-axis moving module; The horizontal movement distance measurement module is installed on the crossbeam and is used to measure the horizontal movement distance of the laser module relative to its initial position when it performs a horizontal avoidance action. The rotary table is rotatably connected to the top of the bed and located below the working area of ​​the laser module; the rotary table can rotate around its own central axis. Several clamping modules are arranged on the top of the rotary table and are evenly distributed around the central axis of the rotary table to clamp the tire mold sidewall plate. The radial telescopic drive module is installed on the top of the rotary table and is connected to each clamping module for driving each clamping module to extend and retract synchronously along the radial direction of the rotary table to adjust the clamping diameter. When the laser module moves horizontally away from its initial position to perform an avoidance action, the radial extension drive module drives each clamping module to perform radial extension motion synchronously, and the horizontal avoidance movement distance of the laser module is directly proportional to the radial extension distance of the clamping module.

[0007] In one embodiment, the dual-axis moving module includes a translation seat and a lifting seat, with the laser module fixedly mounted on the lifting seat; the translation seat is slidably connected to the crossbeam in the horizontal direction and can move along the length of the crossbeam; the lifting seat is slidably connected to the translation seat in the vertical direction and can move up and down in the vertical direction.

[0008] In one embodiment, the laser module includes a mounting bracket and a laser; the mounting bracket is fixedly mounted on the actuator end of the dual-axis moving module; the laser is fixedly mounted on the mounting bracket.

[0009] In one embodiment, the horizontal movement distance measurement module uses a through-beam laser rangefinder; the transmitting end of the through-beam laser rangefinder is installed on the actuator end of the dual-axis movement module or the side wall of the laser module; the receiving end of the through-beam laser rangefinder is installed on one end of the crossbeam; when the actuator end of the dual-axis movement module or the laser module moves upward to the limit position, the transmitting end and the receiving end of the through-beam laser rangefinder are on the same horizontal line.

[0010] In one embodiment, the clamping module includes a support plate and a clamp; the support plate is disposed on the top of the rotary table and is drively connected to the radial telescopic drive module; the clamp is mounted on the top of the support plate.

[0011] In one embodiment, the radial telescopic drive module includes a cylindrical shell, a plurality of screws, and a plurality of movable frames; the cylindrical shell is fixed to the top of the rotary table and coaxially arranged with the rotary table, and each clamping module is distributed around the periphery of the cylindrical shell; the plurality of screws are rotatably connected to the inside of the cylindrical shell and correspond one-to-one with each clamping module, the axis of each screw extends radially along the cylindrical shell, and each screw can rotate around its own central axis; the plurality of movable frames correspond one-to-one with each screw and are threadedly connected to the corresponding screw, and each movable frame penetrates the side wall of the cylindrical shell in the horizontal direction and is fixedly connected to the corresponding clamping module.

[0012] In one embodiment, the rotary worktable has a channel through which it communicates with the interior of the cylindrical shell along its own central axis. A linkage shaft coaxially arranged with the rotary worktable is rotatably connected in the channel. The linkage shaft can rotate around its own central axis. A first bevel gear is fixedly sleeved on the upper end of the linkage shaft, and a second bevel gear meshing with the first bevel gear is sleeved and fixed on each screw.

[0013] In one embodiment, the bed is internally rotatably connected to a drive shaft coaxially arranged with the linkage shaft. A self-locking rotary drive module, driven by the drive shaft, is installed inside the bed. A power docking module is provided between the drive shaft and the linkage shaft. When the drive shaft is driven by the linkage shaft through the power docking module and the self-locking rotary drive module is activated, it can drive each clamping module to move synchronously and radially along the rotary table. When the drive shaft is driven by the linkage shaft through the power docking module and the self-locking rotary drive module is locked in place, the rotary table rotates, driving each clamping module to move synchronously and radially along the rotary table. When the drive shaft is disconnected from the linkage shaft through the power docking module, the rotary table rotates, driving each clamping module to rotate synchronously around the central axis of the rotary table.

[0014] In one embodiment, the self-locking rotary drive module includes a servo motor and a worm gear mechanism; the servo motor is fixedly installed inside the bed, and the worm gear mechanism is drively connected between the output end of the servo motor and the drive shaft.

[0015] In one embodiment, the power docking module includes a fixed disk and several grippers; the fixed disk is fixed to the lower end of the linkage shaft, and each gripper is mounted on the upper end of the drive shaft by a bracket and is evenly distributed around the central axis of the fixed disk.

[0016] Compared with the prior art, the present invention provides a laser engraving device adapted to the sidewall of multi-diameter tire molds, which has the following beneficial effects: 1. This invention, by setting up a horizontal movement distance measurement module, can detect the horizontal avoidance distance of the laser module in real time, so that the avoidance distance of the laser module is proportionally matched with the diameter of the tire sidewall. This ensures that tire sidewalls of different diameters will not collide or interfere with the laser module during hoisting, and can also effectively shorten the avoidance and resetting time of the laser module, significantly improving the overall processing efficiency of the equipment.

[0017] 2. This invention, through the cooperation of the horizontal movement distance measuring module and the radial telescopic drive module, enables the clamping diameter of the clamping module to be synchronously and proportionally adjusted with the horizontal clearance distance of the laser module. When the laser module is adjusted to a suitable clearance position, the coarse adjustment of the clamping diameter of the clamping module is completed simultaneously, eliminating the need for manual step-by-step independent adjustment of the laser clearance position and clamping diameter, and greatly simplifying the preparation process before clamping the tire sidewall.

[0018] 3. Through the mutual cooperation of the radial telescopic drive module, the linkage shaft, the first bevel gear, the second bevel gear, the drive shaft, the self-locking rotary drive module, and the power docking module, this invention can achieve flexible switching between three working conditions: "laser avoidance and coarse adjustment of clamping diameter linkage, fine adjustment of clamping diameter and centering and fixing of tire sidewall, and adjustment of tire sidewall circumferential engraving position". It is suitable for the entire process of clamping preparation, centering and fixing, and engraving processing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the laser of the present invention located at the processing station; Figure 2 This is a schematic diagram of the laser of the present invention located at the avoidance station; Figure 3 This is a side view of the present invention; Figure 4 This is a cross-sectional view of the bed of the present invention; Figure 5 This is a schematic diagram of the self-locking rotary drive module of the present invention; Figure 6 This is a cross-sectional view of the rotary table of the present invention; Figure 7 This is a top view of the cylindrical shell of the present invention; Figure 8 This is a schematic diagram of the first working condition of the present invention; Figure 9 This is a schematic diagram of the second working condition of the present invention; Figure 10 This is a schematic diagram of working condition three of the present invention.

[0020] In the diagram: 1. Bed; 2. Crossbeam; 3. Dual-axis moving module; 301. Translation seat; 302. Lifting seat; 4. Laser module; 401. Mounting bracket; 402. Laser; 5. Horizontal movement distance measuring module; 6. Rotary worktable; 7. Clamping module; 701. Support plate; 702. Fixture; 8. Radial telescopic drive module; 801. Cylinder shell; 802. Screw; 803. Moving frame; 9. Linkage shaft; 10. First bevel gear; 11. Second bevel gear; 12. Drive shaft; 13. Self-locking rotary drive module; 131. Servo motor; 132. Worm gear mechanism; 14. Power docking module; 141. Fixed plate; 142. Gripper. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1 to 10 A laser engraving device adapted to the sidewalls of multi-diameter tire molds includes a bed 1, which serves as the overall support foundation of the device and provides a stable mounting carrier for various functional components.

[0023] The present invention also includes: a crossbeam 2, a dual-axis moving module 3, a laser module 4, a horizontal moving distance measuring module 5, a rotary table 6, several clamping modules 7, and a radial telescopic drive module 8.

[0024] The crossbeam 2 is fixedly mounted above the bed 1 and extends horizontally, providing basic support for other components. The rotary table 6 is rotatably connected to the top of the bed 1 and is located below the working area of ​​the laser module 4; the rotary table 6 can rotate around its own central axis to adjust the circumferential engraving position of the tire sideplate.

[0025] It should be added that the rotary table 5 is driven by a servo motor or stepper motor with a self-locking brake. After rotating to a set angle, this type of motor can achieve mechanical self-locking through an electromagnetic brake. After locking, the rotary table 5 will not move due to external force or its own weight, which can ensure the accurate positioning of the tire side plate during the engraving process.

[0026] The following is an introduction to the dual-axis motion module 3: The dual-axis moving module 3 is fixedly installed on the crossbeam 2, and the actuator can move horizontally along the length of the crossbeam 2 and move vertically up and down to complete the processing position adjustment and avoidance action of the laser module 4.

[0027] In this embodiment, the dual-axis moving module 3 includes a translation seat 301 and a lifting seat 302, with the laser module 4 fixedly mounted on the lifting seat 302. The translation seat 301 is slidably connected to the crossbeam 2 in the horizontal direction and can move along the length of the crossbeam 2; for example, a synchronous belt horizontal drive structure can be installed on the crossbeam 2 to drive the translation seat 301 to move in the horizontal direction. The lifting seat 302 is slidably connected to the translation seat 301 in the vertical direction and can move up and down in the vertical direction; for example, a lead screw vertical drive structure can be installed on the translation seat 301 to drive the lifting seat 302 to move in the vertical direction.

[0028] Using this dual-axis moving module 3, during laser engraving operations, the translation seat 301 moves horizontally, adjusting the lateral engraving position of the laser module 4. The lifting seat 302 moves up and down, adjusting the focal length between the laser module 4 and the tire sidewall surface. When performing obstacle avoidance maneuvers, the lifting seat 302 can be raised to its limit position first, and then the translation seat 301 can be driven to move horizontally, thus moving the laser module 4 to the side space of the tire sidewall for obstacle avoidance.

[0029] The following is an introduction to laser module 4: The laser module 4 is fixedly installed on the execution end of the dual-axis moving module 3. It can adjust the horizontal and vertical positions under the drive of the dual-axis moving module 3, and realize actions such as engraving position adjustment, focus calibration, and hoisting avoidance.

[0030] In this embodiment, the laser module 4 includes a mounting frame 401 and a laser 402; the mounting frame 401 is fixedly mounted on the execution end of the dual-axis moving module 3, providing a mounting carrier for the laser 402; the laser 402 is fixedly mounted on the mounting frame 401, and performs non-contact engraving of patterns, markings and other structures on the surface of the tire sidewall by emitting a laser beam.

[0031] It should be added that when the laser module 4 is in the initial position, the laser beam emitted by the laser 402 is collinear with the central axis of the rotary table 6; after the tire sidewall is centered and fixed by the clamping module 7, there is no need to calibrate and verify the position coordinates between the laser 402 and the tire sidewall, and it can directly enter the laser engraving process.

[0032] The following is an introduction to the horizontal movement distance measurement module 5: The horizontal movement distance measuring module 5 is fixedly installed on the crossbeam 2. It is used to measure the horizontal movement distance of the laser module 4 relative to its initial position when it performs a horizontal avoidance action, and transmits the displacement detection signal to the external CNC control system in real time to provide data support for the radial adjustment of the clamping module 7.

[0033] In this embodiment, the horizontal movement distance measuring module 5 uses a through-beam laser rangefinder sensor. This sensor has high detection accuracy and fast response speed, and can adapt to the processing environment of tire molds. The transmitting end of the through-beam laser rangefinder sensor is installed on the actuator end of the dual-axis moving module 3 or the side wall of the laser module 4, and can move synchronously with the laser module 4. The receiving end of the through-beam laser rangefinder sensor is installed on one end of the crossbeam 2 as a fixed detection reference. When the actuator end of the dual-axis moving module 3 or the laser module 4 moves upward to the limit position, the transmitting end and the receiving end of the through-beam laser rangefinder sensor are on the same horizontal line, satisfying the working conditions of through-beam ranging.

[0034] The horizontal movement distance measurement module 5 is used so that the sensor will only start and detect the horizontal movement distance of the laser module 4 when the laser module 4 rises to the limit position and officially performs the horizontal avoidance action. This effectively avoids invalid displacement signals generated by the laser module 4 during the regular engraving and focusing and station fine adjustment process, and ensures the relevance and accuracy of the detection data.

[0035] The following is an introduction to clamping module 7: Several clamping modules 7 are arranged on the top of the rotary table 6 and are evenly distributed around the central axis of the rotary table 6 to clamp the tire mold sidewall.

[0036] In this embodiment, the clamping module 7 includes a support plate 701 and a clamp 702. The support plate 701 is arranged on the top of the rotary table 6 and is connected to the radial telescopic drive module 8 to adjust the clamping diameter. The clamp 702 is mounted on the top of the support plate 701 and is used to fix the tire sidewall plate.

[0037] The following is an introduction to the radial telescopic drive module 8: The radial telescopic drive module 8 is installed on the top of the rotary table 6 and is connected to each clamping module 7 for transmission. It is used to drive each clamping module 7 to extend and retract synchronously along the radial direction of the rotary table 6 to adjust the clamping diameter, thereby adapting to the clamping requirements of tire sidewalls of different diameters.

[0038] When the laser module 4 moves horizontally away from its initial position to perform an avoidance action, the radial extension drive module 8 drives each clamping module 7 to perform radial extension and retraction movements synchronously. The horizontal avoidance movement distance of the laser module 4 is directly proportional to the radial extension and retraction distance of the clamping module 7. That is, the overall clamping diameter of the clamping module 7 will increase synchronously as the avoidance distance of the laser module 4 increases, and decrease synchronously as the avoidance distance decreases.

[0039] Using the above-mentioned linkage design, during the tire sidewall clamping preparation stage: firstly, the horizontal clearance distance of the matching laser module 4 is determined according to the diameter of the tire sidewall to be processed; then, the dual-axis moving module 3 drives the laser module 4 to perform a horizontal clearance action, moving the laser module 4 to a safe clearance position; the larger the diameter of the tire sidewall, the greater the required horizontal clearance distance for the laser module 4. This adjustment method ensures that the laser module 4 is always within a reasonable clearance range, which can completely avoid the movement trajectory of the tire sidewall and external lifting tools during hoisting, and will not increase the adjustment time for the laser module 4 to be reset to the processing position due to excessive clearance distance.

[0040] Meanwhile, the horizontal movement distance measuring module 5 collects the horizontal avoidance displacement data of the laser module 4 in real time and transmits the detection signal to the external CNC control system. The system drives the radial extension drive module 8 to move according to the direct proportional linkage relationship, automatically adjusting the clamping diameter of the clamping module 7 to the appropriate range. This adjustment method can achieve coarse adjustment of the clamping diameter, ensuring that there is enough space for the sidewall plate to be smoothly inserted, and avoiding the increase in subsequent centering adjustment time due to an excessively large diameter.

[0041] After the clamping diameter is coarsely adjusted, the tire sidewall is hoisted to the clamping position. Then, the clamping module 7 is slightly adjusted by the radial telescopic drive module 8 to complete the centering and fixing of the tire sidewall, ensuring that the central axis of the tire sidewall is coaxial with the central axis of the rotary table 6. Finally, the laser module 4 is moved to its initial position. Since the laser beam emitted by the laser 402 is collinear with the central axis of the rotary table 6 when the laser module 4 is in its initial position, no additional calibration or verification of the positional coordinates between the laser 402 and the tire sidewall is required after the laser module 4 is reset to its initial position, and the equipment can directly proceed to the laser engraving process.

[0042] The above design, through the cooperation of the horizontal movement distance measuring module 5 and the radial extension drive module 8, makes the horizontal avoidance distance of the laser module 4 directly proportional to the clamping diameter of the clamping module 7, realizing the synchronous completion of avoidance position adjustment and clamping diameter coarse adjustment, which greatly shortens the preparation process and overall cycle before clamping the tire sidewall.

[0043] In this embodiment, the radial telescopic drive module 8 includes a cylindrical shell 801, a plurality of screws 802, and a plurality of movable frames 803. The cylindrical shell 801 is fixed to the top of the rotary table 6 and is coaxially arranged with the rotary table 6, providing installation space for other components. Each clamping module 7 is distributed around the periphery of the cylindrical shell 801 and can extend and retract radially along the cylindrical shell 801.

[0044] Several screws 802 are rotatably connected to the inside of the cylindrical shell 801 and correspond one-to-one with each clamping module 7. The axis of each screw 802 extends radially along the cylindrical shell 801, and each screw 802 can rotate around its own central axis.

[0045] Several movable frames 803 correspond one-to-one with each screw 802 and are threadedly connected to the corresponding screw 802. Each movable frame 803 passes through the side wall of the cylindrical shell 801 in the horizontal direction and is fixedly connected to the corresponding clamping module 7.

[0046] When the screw 802 rotates around its own central axis, it can drive the moving frame 803 to move radially and linearly along the cylinder shell 801 through the threaded transmission, thereby driving the clamping module 7 to synchronously extend and retract radially, so as to realize the adjustment of the clamping diameter.

[0047] In another embodiment of the present invention, the rotary table 6 has a channel extending along its central axis and communicating with the interior of the cylindrical shell 801. A linkage shaft 9, coaxially arranged with the rotary table 6, is rotatably connected within the channel and can rotate around its central axis. A first bevel gear 10 is fixedly sleeved on the upper end of the linkage shaft 9, and a second bevel gear 11, meshing with the first bevel gear 10, is sleeved and fixed on each screw 802.

[0048] When the linkage shaft 9 rotates around its own central axis, it can drive each screw 802 to rotate synchronously through the cooperation of the first bevel gear 10 and the second bevel gear 11, thereby driving each clamping module 7 to extend and retract radially synchronously.

[0049] To achieve the requirements of radial extension and synchronous rotation of the clamping module 7, the present invention specifically designs the following transmission structure: The bed 1 is internally rotatably connected to a drive shaft 12 coaxially arranged with the linkage shaft 9. A self-locking rotary drive module 13 is installed inside the bed 1 and is connected to the drive shaft 12. A power docking module 14 is provided between the drive shaft 12 and the linkage shaft 9.

[0050] When the drive shaft 12 is connected to the linkage shaft 9 via the power docking module 14 and the self-locking rotary drive module 13 is started, it can drive each clamping module 7 to move synchronously along the radial direction of the rotary table 6. When the drive shaft 12 is connected to the linkage shaft 9 via the power docking module 14 and the self-locking rotary drive module 13 is locked to stop rotation, the rotary table 6 rotates, which can drive each clamping module 7 to move synchronously in the radial direction of the rotary table 6. When the drive shaft 12 is disconnected from the linkage shaft 9 via the power docking module 14, the rotary table 6 rotates, which can drive each clamping module 7 to rotate synchronously around the central axis of the rotary table 6.

[0051] The above design allows for flexible switching between three operating conditions: Working condition 1: Laser avoidance and coarse adjustment of clamping diameter are linked; When the clearance position of laser module 4 needs to be adjusted, and the clamping diameter of clamping module 7 is coarsely adjusted simultaneously, the rotary table 6 is in a self-locking fixed state (no rotation occurs). The power docking module 14 activates to form a rigid transmission docking between drive shaft 12 and linkage shaft 9. At this time, the self-locking rotary drive module 13 starts working, and its output power is transmitted to linkage shaft 9 via drive shaft 12. The first bevel gear 10 at the upper end of linkage shaft 9 rotates synchronously. Through the meshing transmission with the second bevel gear 11 on each screw 802, it drives all screws 802 to rotate synchronously. Then, through the threaded engagement between screws 802 and linkage frame 803, it drives each clamping module 7 to extend and retract synchronously along the radial direction of rotary table 6 (e.g., Figure 8 (As shown). During this process, after the horizontal avoidance distance of the laser module 4 is detected by the horizontal movement distance measuring module 5, the CNC system controls the output stroke of the self-locking rotary drive module 13 according to the preset proportional relationship, so that the coarse adjustment of the clamping diameter and the laser avoidance action are completed synchronously, and the tire sideplate diameter specification is quickly adapted.

[0052] Working condition 2: Fine adjustment of clamping diameter and centering and fixing of tire sidewall; When fine-tuning of the clamping diameter of the clamping module 7 is required to achieve centering and fixing of the tire sidewall, the power docking module 14 maintains the transmission docking state between the drive shaft 12 and the linkage shaft 9. At the same time, the self-locking rotary drive module 13 activates its self-locking function, keeping the drive shaft 12 and the linkage shaft 9 fixed (unable to rotate). At this time, the rotary table 6 is controlled to rotate around its own central axis. Since the first bevel gear 10 is fixed with the linkage shaft 9, each second bevel gear 11, while revolving with the rotary table 6, will rotate around the first bevel gear 10 (i.e., planetary motion). This rotational power is transmitted to the corresponding screw 802, driving the screw 802 to rotate, thereby causing the clamping module 7 to perform radial extension and retraction (e.g.,...). Figure 9 (As shown). Through this planetary transmission principle, the clamping module 7 can be used to center and fix the tire sidewall, ultimately making the central axis of the tire sidewall collinear with the central axis of the rotary table 6.

[0053] Working condition 3: Adjustment of the circumferential engraving position on the tire sidewall; When the circumferential processing position of the tire sidewall needs to be adjusted during laser engraving, the power docking module 14 activates, disconnecting the drive shaft 12 from the linkage shaft 9. At this time, the power transmission path between the self-locking rotary drive module 13 and the radial telescopic drive module 8 is cut off. Controlling the rotation of the rotary table 6 can drive the clamping module 7, tire sidewall, radial telescopic drive module 8, and linkage shaft 9 to rotate synchronously around the central axis of the rotary table 6 (e.g., Figure 10 As shown, the engraving area of ​​the tire sidewall can be flexibly switched without adjusting the position of the laser module 4.

[0054] It is worth noting that this invention employs a bevel gear meshing transmission structure with a first bevel gear 10 and a second bevel gear 11. Compared to traditional gear rack, synchronous belt, and other transmission methods, bevel gear transmission can achieve a 90° turn in the power direction, converting vertical rotational power into horizontal radial driving power. It features a compact structure, high space utilization, and perfectly fits the internal installation space of the rotary table 6 and the cylindrical shell 801. Furthermore, through the planetary motion design of the bevel gears, the rotational power of the rotary table 6 is sufficient to simultaneously achieve the revolution and rotation of the second bevel gear 11, eliminating the need for an additional independent fine-tuning drive source. This significantly simplifies the structural complexity of the centering mechanism and reduces equipment manufacturing costs and maintenance difficulty.

[0055] The present invention adopts the above design, and through the cooperation of the power docking module 14 and the self-locking rotary drive module 13, it can quickly realize the switching of three working conditions: "coarse adjustment linkage, fine adjustment centering, and circumferential adjustment", which can adapt to the needs of the entire process of clamping preparation, centering and fixing, and engraving processing, greatly shorten the clamping cycle and improve the work efficiency.

[0056] In this embodiment, the self-locking rotary drive module 13 includes a servo motor 131 and a worm gear mechanism 132; the servo motor 131 is fixedly installed inside the bed 1, and its output shaft is arranged in a horizontal direction. The worm gear mechanism 132 is drively connected between the output end of the servo motor 131 and the drive shaft 12.

[0057] When the coarse adjustment of the clamping module 7 needs to be performed, the servo motor 131 receives the control signal from the CNC system and starts. Its output power is transmitted to the worm wheel through the worm gear. The horizontal rotation power is converted into the vertical rotation power of the drive shaft 12 through the meshing transmission of the worm wheel and worm gear, which in turn drives the linkage shaft 9 and the subsequent bevel gear mechanism to move, so as to realize the synchronous radial extension and retraction of the clamping module 7. When the clamping module 7 needs to be fine-tuned, the servo motor 131 stops working and locks the drive shaft 12 through the self-locking characteristic of the worm gear mechanism 132, so that the drive shaft 12, the linkage shaft 9 and the first bevel gear 10 remain fixed, providing a stable reference for the planetary motion of the second bevel gear 11. When the working condition is switched to tire sidewall circumferential adjustment, the servo motor 131 remains locked and the power docking module 14 is disconnected from the transmission to prevent the drive shaft 12 from rotating synchronously with the linkage shaft 9.

[0058] In this embodiment, the power docking module 14 includes a fixed disk 141 and several grippers 142; the fixed disk 141 is fixed to the lower end of the linkage shaft 9, and each gripper 142 is mounted on the upper end of the drive shaft 12 by a bracket and is evenly distributed around the central axis of the fixed disk 141.

[0059] During coarse adjustment and fine adjustment centering, the CNC system controls the drive end of the gripper 142 to be ventilated (or energized). The gripping end of the gripper 142 is clamped onto the plate of the fixed plate 141, and the rigid transmission connection between the drive shaft 12 and the linkage shaft 9 can be achieved through friction or mechanical engagement. At this time, the rotational power of the drive shaft 12 can be synchronously transmitted to the linkage shaft 9, or the linkage shaft 9 can be fixed together when the drive shaft 12 is locked.

[0060] During circumferential adjustment, the CNC system controls the pressure relief (or power cut-off) of the drive end of the gripper 142, causing the gripper end of the gripper 142 to open and disengage from the fixed plate 141, thus disconnecting the drive shaft 12 from the linkage shaft 9. At this time, the linkage shaft 9 can rotate freely with the rotary table 6, while the drive shaft 12 and the self-locking rotary drive module 13 remain stationary and do not interfere with each other.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0062] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser engraving device adapted to the sidewalls of multi-diameter tire molds, comprising a bed, characterized in that, Also includes: The crossbeam is fixedly mounted above the bed and extends horizontally. The dual-axis moving module is installed on the crossbeam, and the actuator can move horizontally along the length of the crossbeam and move vertically up and down. The laser module is installed at the actuator end of the dual-axis moving module; The horizontal movement distance measurement module is installed on the crossbeam and is used to measure the horizontal movement distance of the laser module relative to its initial position when it performs a horizontal avoidance action. The rotary table is rotatably connected to the top of the bed and located below the working area of ​​the laser module; the rotary table can rotate around its own central axis. Several clamping modules are arranged on the top of the rotary table and are evenly distributed around the central axis of the rotary table to clamp the tire mold sidewall plate. The radial telescopic drive module is installed on the top of the rotary table and is connected to each clamping module for driving each clamping module to extend and retract synchronously along the radial direction of the rotary table to adjust the clamping diameter. When the laser module moves horizontally away from its initial position to perform an avoidance action, the radial extension drive module drives each clamping module to perform radial extension motion synchronously, and the horizontal avoidance movement distance of the laser module is directly proportional to the radial extension distance of the clamping module.

2. The laser engraving equipment for adapting to the sidewalls of multi-diameter tire molds according to claim 1, characterized in that: The dual-axis moving module includes a translation base and a lifting base, and the laser module is fixedly installed on the lifting base; The translation seat is slidably connected to the crossbeam in the horizontal direction and can move along the length of the crossbeam; the lifting seat is slidably connected to the translation seat in the vertical direction and can move up and down in the vertical direction.

3. The laser engraving equipment for adapting to the sidewalls of multi-diameter tire molds according to claim 1 or 2, characterized in that: The laser module includes a mounting frame and a laser; the mounting frame is fixedly mounted on the actuator end of the dual-axis moving module; the laser is fixedly mounted on the mounting frame.

4. The laser engraving equipment for adapting to the sidewalls of multi-diameter tire molds according to claim 1, characterized in that: The horizontal movement distance measurement module uses a through-beam laser rangefinder; the transmitting end of the through-beam laser rangefinder is installed on the actuator end of the dual-axis movement module or on the side wall of the laser module; the receiving end of the through-beam laser rangefinder is installed on one end of the crossbeam. When the actuator of the dual-axis moving module or the laser module moves upward to the limit position, the transmitter and receiver of the through-beam laser rangefinder are on the same horizontal line.

5. The laser engraving equipment for adapting to the sidewalls of multi-diameter tire molds according to claim 1, characterized in that: The clamping module includes a support plate and a clamp; The support plate is arranged on the top of the rotary table and is connected to the radial telescopic drive module; the clamp is installed on the top of the support plate.

6. The laser engraving equipment for adapting to the sidewalls of multi-diameter tire molds according to claim 1, characterized in that: The radial telescopic drive module includes a cylindrical shell, several screws, and several movable frames; The cylindrical shell is fixed to the top of the rotary worktable and is coaxially arranged with the rotary worktable, and each clamping module is distributed around the periphery of the cylindrical shell; Several screws are rotatably connected to the inside of the cylindrical shell and correspond one-to-one with each clamping module. The axis of each screw extends radially along the cylindrical shell, and each screw can rotate around its own central axis. Several movable frames correspond one-to-one with each screw and are threadedly connected to the corresponding screw. Each movable frame passes through the side wall of the cylinder shell in the horizontal direction and is fixedly connected to the corresponding clamping module.

7. The laser engraving equipment for adapting to the sidewalls of multi-diameter tire molds according to claim 6, characterized in that: The rotary worktable has a channel that runs through it along its central axis and communicates with the inside of the cylinder. A linkage shaft that is coaxially arranged with the rotary worktable is rotatably connected in the channel. The linkage shaft can rotate around its central axis. A first bevel gear is fixedly sleeved on the upper end of the linkage shaft, and a second bevel gear that meshes with the first bevel gear is sleeved and fixed on each screw.

8. The laser engraving equipment for adapting to the sidewalls of multi-diameter tire molds according to claim 7, characterized in that: The bed is internally rotatably connected to a drive shaft coaxially arranged with the linkage shaft. A self-locking rotary drive module that is connected to the drive shaft is installed inside the bed. A power docking module is provided between the drive shaft and the linkage shaft. When the drive shaft is connected to the linkage shaft via the power docking module and the self-locking rotary drive module is started, it can drive each clamping module to move synchronously and radially along the rotary table. When the drive shaft is connected to the linkage shaft via the power docking module and the self-locking rotary drive module is locked to prevent rotation, the rotary table rotates, which can drive each clamping module to move synchronously in the radial direction of the rotary table. When the drive shaft is disconnected from the linkage shaft via the power docking module, the rotary table rotates, which can drive each clamping module to rotate synchronously around the central axis of the rotary table.

9. The laser engraving equipment for adapting to the sidewalls of multi-diameter tire molds according to claim 8, characterized in that: The self-locking rotary drive module includes a servo motor and a worm gear mechanism; The servo motor is fixedly installed inside the bed, and the worm gear mechanism is connected between the output end of the servo motor and the drive shaft.

10. The laser engraving equipment for adapting to the sidewalls of multi-diameter tire molds according to claim 8, characterized in that: The power docking module includes a fixed plate and several grippers; The fixed plate is fixed to the lower end of the linkage shaft, and each gripper is mounted on the upper end of the drive shaft through a bracket and is evenly distributed around the central axis of the fixed plate.

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