A dual laser machining device

Abstract

This invention relates to the field of laser processing technology, and more particularly to a dual-laser processing device. It includes: a first laser emitter and a second laser emitter; it also includes: a laser engraving head, a rear reflector switching mechanism, an intermediate reflector switching mechanism, and a front reflector adjustment mechanism; the front reflector adjustment mechanism includes a first front reflector, a second front reflector, and a front adjustment mechanism; the intermediate reflector switching mechanism includes a first intermediate reflector, a second intermediate reflector, and an intermediate switching mechanism; the rear reflector switching mechanism includes a first rear reflector, a second rear reflector, and a rear switching mechanism. By setting up a reflector switching mechanism, this invention switches to the corresponding reflector when different lasers are applied, which can effectively reduce laser absorption loss and improve laser utilization.

Description

[0001] This application is application number CN202510086355.5, and the invention title is: A divisional application of a dual-laser processing device. Technical Field

[0002] This invention relates to the field of laser processing technology, and in particular to a dual-laser processing device. Background Technology

[0003] Different wavelengths of laser light exhibit different characteristics when cutting workpieces made of different materials. For example, longer wavelength lasers have better penetration and are better at cutting materials such as wood and leather, while shorter wavelength lasers are better absorbed by metals. To facilitate the cutting of a wider range of materials, many laser processing machines use two laser sources, such as carbon dioxide laser emitters and fiber laser emitters. However, when using two laser sources, they share a common light source reflection system through a beam combiner. That is, the beam combiner introduces the two lasers into the light source reflection system and projects them onto the laser processing head.

[0004] When a mirror reflects a laser, it also absorbs the laser energy. The absorption rate of the same material varies for different wavelengths of laser. In order to reduce the absorption loss of dual-source lasers, a mirror material with low absorption for both types of lasers is generally used. Even so, the laser loss is still relatively large after multiple reflections. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a dual-laser processing device with a mirror switching mechanism, which can effectively reduce laser absorption loss.

[0006] A dual-laser processing device, comprising:

[0007] The first laser emitter and the second laser emitter emit the first laser and the second laser respectively.

[0008] It also includes: a laser engraving head, a rear reflector switching mechanism, a middle reflector switching mechanism, and a front reflector adjustment mechanism;

[0009] The front reflector adjustment mechanism includes a first front reflector and a second front reflector for reflecting the first laser and the second laser to the intermediate reflector switching mechanism, respectively, and a front adjustment mechanism for adjusting the position of the first front reflector.

[0010] The intermediate reflector switching mechanism includes a first intermediate reflector and a second intermediate reflector for reflecting the first laser and the second laser to the rear reflector switching mechanism, respectively, and an intermediate switching mechanism for switching the first intermediate reflector and the second intermediate reflector to enter the intermediate reflection position.

[0011] The rear reflector switching mechanism includes a first rear reflector and a second rear reflector for reflecting the first laser and the second laser to the laser engraving head, respectively, and a rear switching mechanism for switching the first rear reflector and the second rear reflector into the rear reflection position.

[0012] Furthermore, the front adjustment mechanism includes a linear mechanism for driving the first front reflector to move or a rotary mechanism for driving the first front reflector to rotate.

[0013] Furthermore, the intermediate switching mechanism includes: an intermediate rotating disk, a rotating sleeve, and a base plate. The intermediate rotating disk has two spaced mounting positions for connecting the first intermediate reflector and the second intermediate reflector, respectively. The base plate has a shaft hole and is rotatably connected to a central rotating shaft. The lower end of the rotating sleeve is open, and the upper end of the rotating sleeve is fixedly connected to the intermediate rotating disk. The inner bottom surface of the rotating sleeve has a shaft hole and is rotatably connected to the upper end of the central rotating shaft. An elastic transmission component is connected between the rotating sleeve and the central rotating shaft, and the central rotating shaft drives the rotating sleeve to rotate through the elastic transmission component. The intermediate rotating disk is connected to a positioning module. When one of the first intermediate reflector or the second intermediate reflector is located in the intermediate reflection position, the intermediate rotating disk is temporarily positioned by the positioning module, and the elastic transmission component deforms.

[0014] Furthermore, the inner side of the rotating sleeve is provided with a plurality of inner protrusions, and the side of the central rotating shaft is provided with a plurality of outer protrusions, and the elastic transmission component is connected between adjacent inner protrusions and outer protrusions.

[0015] Furthermore, the positioning module includes a positioning sleeve, the lower end of which is connected to the substrate, and the upper end of which is provided with a mounting hole. A positioning ball and a second elastic element for pushing the positioning ball outward are provided in the mounting hole. The upper end of the positioning ball abuts against the lower end face of the intermediate rotating disk. The lower end face of the intermediate rotating disk is provided with two positioning holes, which are corresponding to the first and second intermediate reflectors. When the first intermediate reflector is in the intermediate reflection position, the upper end of the positioning ball enters one of the positioning holes; when the second intermediate reflector is in the intermediate reflection position, the upper end of the positioning ball enters the other positioning hole.

[0016] Furthermore, an intermediate wheel is connected to the lower end of the central shaft. The intermediate wheel is connected to the front adjustment mechanism through a transmission rope assembly. A third elastic element is provided between the intermediate wheel and the base plate to assist in the reset of the intermediate wheel. When the first intermediate reflector is in the intermediate reflection position, the elastic potential energy of the third elastic element is the minimum. When the second intermediate reflector is in the intermediate reflection position, the elastic potential energy of the third elastic element is the maximum.

[0017] Furthermore, the post-switching mechanism includes:

[0018] The rear rotating disk has two rotating arms, which are respectively connected to the first rear reflector and the second rear reflector.

[0019] The rear substrate is vertically arranged; the upper end of the rear substrate has a shaft hole and is rotatably connected to a rear rotating shaft, one end of the rear rotating shaft passes through the shaft hole and is connected to the rear rotating disk, and the lower end of the rear substrate is connected to the laser engraving head.

[0020] The intermediate shaft and the rear drive shaft are connected to the rear drive shaft and the rear rotating shaft at both ends, respectively. A rear elastic transmission component is connected between the rear drive shaft and the rear rotating shaft.

[0021] The rear positioning unit is disposed on the rear base plate, and the rear rotating disk is provided with two rear positioning holes for positioning with the positioning unit; when the first rear reflector or the second rear reflector is in the reflection position, the rear positioning unit is connected to the rear rotating disk through a corresponding rear positioning hole and prevents the rear rotating disk from rotating.

[0022] Furthermore, the outer end of the rear drive shaft is connected to a rear rotating wheel, which is connected to the front adjustment mechanism or the intermediate switching mechanism via a drive rope assembly. A cover is connected to the back of the rear base plate, and the rear bottom plate of the cover is provided with a shaft hole that mates with the rear drive shaft. The rear drive shaft is rotatably connected to the rear bottom plate. A fourth elastic element is connected between the rear bottom plate and the rear rotating wheel. When the first rear reflector is in the rear reflection position, the elastic potential energy of the fourth elastic element is at its minimum, and when the second rear reflector is in the rear reflection position, the elastic potential energy of the fourth elastic element is at its maximum.

[0023] Furthermore, the rear substrate is provided with a rear mounting hole, and the rear positioning unit includes a fifth elastic member and a positioning ball disposed in the rear mounting hole. When the first rear reflector is in the reflecting position, a portion of the positioning ball enters one of the positioning holes; when the second rear reflector is in the reflecting position, a portion of the positioning ball enters the other positioning hole.

[0024] Furthermore, the cover has lugs on both sides, the lugs have connecting grooves, the rear base plate has connecting holes, and the cover is fixedly connected to the rear base plate through connectors.

[0025] Furthermore, it also includes an XY moving mechanism, which includes an X moving mechanism and Y moving mechanisms located on both sides of the X moving mechanism. The X moving mechanism is connected to the Y moving mechanisms on both sides. The rear base plate is connected to the X moving mechanism. The intermediate reflector switching mechanism is disposed in the X moving mechanism. The transmission rope assembly includes a flexible sleeve and a core wire. The middle part of the core wire is sleeved with the flexible sleeve and can move relative to the flexible sleeve.

[0026] Furthermore, the linear mechanism includes a bracket, which has a fixedly connected base plate and a vertical support plate. The front of the vertical support plate is connected to a vertical guide rail and a vertically arranged servo motor. The vertical guide rail is slidably connected to a vertical slider. The servo motor is driven by a lead screw, which is threadedly connected to a nut block. The nut block is fixedly connected to a lifting block. One end of the lifting block is fixedly connected to the vertical slider, and the other end of the lifting block is fixedly connected to the first front reflector.

[0027] Furthermore, N dimming mirrors are provided between the first laser emitter and the first front reflector, and / or N dimming mirrors are provided between the second laser reflector and the second front reflector.

[0028] The beneficial effects of the present invention are as follows: By setting a reflector switching mechanism, the present invention can switch to the corresponding reflector when different lasers are applied, which can effectively reduce the absorption loss of laser and improve the laser utilization rate. Attached Figure Description

[0029] Figure 1 This is a schematic diagram illustrating the working principle of the laser engraving machine in this embodiment.

[0030] Figure 2 This is a schematic diagram of the second working principle of the laser engraving machine in this embodiment.

[0031] Figure 3 This is a schematic diagram of one structure of the laser engraving machine in this embodiment.

[0032] Figure 4 for Figure 3 Another perspective structural diagram.

[0033] Figure 5 This is a schematic diagram of one structure of the intermediate reflector switching mechanism in this embodiment.

[0034] Figure 6 for Figure 5 A schematic diagram of a structure without the positioning sleeve.

[0035] Figure 7 This is a schematic diagram illustrating the cooperation between the intermediate rotating disk, the central rotating shaft, and the rotating sleeve in this embodiment.

[0036] Figure 8 for Figure 7 A schematic diagram of its decomposition.

[0037] Figure 9 for Figure 8 Another perspective illustration.

[0038] Figure 10 This is a schematic diagram of a positioning sleeve.

[0039] Figure 11This is a schematic diagram of a structure in which the rear reflector switching mechanism and the laser engraving head cooperate in this embodiment.

[0040] Figure 12 for Figure 11 Another perspective illustration.

[0041] Figure 13 for Figure 12 A schematic diagram of a structure without the cover.

[0042] Figure 14 for Figure 13 Enlarged diagram of point A in the middle.

[0043] Figure 15 This is a schematic diagram of the cooperation between the rear positioning unit and the rear rotating disk.

[0044] Figure 16 This is a schematic diagram of a front reflector adjustment mechanism.

[0045] Figure label:

[0046] 1—Laser engraving head; 2—Rear reflector switching mechanism; 3—Intermediate reflector switching mechanism; 4—Front reflector adjustment mechanism; 5—First laser emitter; 6—Second laser emitter; 7—Dimming reflector; 10—Transmission rope assembly; 21—First rear reflector; 22—Second rear reflector; 23—Rear rotating disk; 24—Rotating arm; 25—Rear base plate; 26—Cover; 27—Fourth elastic element; 28—Rear rotating wheel; 29—Rear transmission shaft; 210—Intermediate shaft; 211—Rear elastic transmission element; 212—Rear rotating shaft; 213—Positioning ball; 214—Fifth elastic element; 261—Lug; 262—Connecting groove; 31—First intermediate reflector; 32—Second intermediate reflector; 33—Base plate; 34—Intermediate rotating disk; 35—Positioning sleeve; 36—Rotating sleeve; 37—Third elastic element; 38—Intermediate wheel 39 – Elastic transmission component; 310 – Central shaft; 311 – Outer protrusion; 341 – Positioning hole; 342 – Connecting column; 351 – Positioning column; 352 – Positioning ball; 353 – Second elastic component; 361 – Inner protrusion; 362 – Shaft hole; 363 – Connecting hole; 41 – First front reflector; 42 – Second front reflector; 43 – Lead screw; 44 – Lifting block; 45 – Nut block; 46 – Servo motor; 47 – Vertical guide rail; 48 – Vertical slider; 49 – Vertical support plate; 410 – Base plate; 8 – XY movement mechanism; 81 – X movement mechanism; 82 – Y movement mechanism. Detailed Implementation

[0047] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0048] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0049] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0051] The present invention will now be described in detail with reference to the accompanying drawings. Figures 1 to 16 As shown.

[0052] Example 1: See Figures 1 to 4A dual-laser processing device includes: a first laser emitter 5 and a second laser emitter 6 that emit a first laser and a second laser respectively; it also includes: a laser engraving head 1, a rear reflector switching mechanism 2, an intermediate reflector switching mechanism 3, and a front reflector adjustment mechanism 4; wherein: the front reflector adjustment mechanism 4 includes a first front reflector 41 and a second front reflector 42 for reflecting the first laser and the second laser to the intermediate reflector switching mechanism 3 respectively, and a front adjustment mechanism for adjusting the position of the first front reflector 41; the intermediate reflector switching mechanism 3 includes a first intermediate reflector 31 and a second intermediate reflector 32 for reflecting the first laser and the second laser to the rear reflector switching mechanism 2 respectively, and an intermediate switching mechanism for switching the first intermediate reflector 31 and the second intermediate reflector 32 to the intermediate reflection position; the rear reflector switching mechanism 2 includes a first rear reflector 21 and a second rear reflector 22 for reflecting the first laser and the second laser to the laser engraving head 1 respectively, and a rear switching mechanism for switching the first rear reflector 21 and the second rear reflector 22 to the rear reflection position.

[0053] This technical solution improves the existing dual-source laser processing machine by replacing the existing single intermediate reflector and single rear reflector with intermediate reflector mechanisms and rear reflector mechanisms, respectively. In the initial state during use: the front reflector is located in the first front reflection position, the first intermediate reflector is located in the intermediate reflection position, and the first rear reflector 21 is located in the rear reflection position. At this time, if the first laser emitter 5 is working and the second laser emitter 6 is not working, the front adjustment mechanism, the intermediate switching mechanism, and the rear switching mechanism do not need to be activated. The first laser is projected onto the first front reflector 41, and then reflected sequentially onto the first intermediate reflector, the first rear reflector 21, and the laser engraving head 1. When the second laser emitter 6 is switched to operation, the first laser emitter 5 stops working. At this time, the front adjustment mechanism moves the first front reflector 41 out of the first front reflection position; the second front reflector 42 remains in the second front reflection position, and the first front reflector 41 is located between the second front reflector 42 and the intermediate reflector switching mechanism 3. The intermediate switching mechanism operates, the first intermediate reflector 31 moves out of the intermediate reflection position, and the second intermediate reflector 32 enters the intermediate reflection position; the rear switching mechanism also operates, the first rear reflector 21 moves out of the rear reflection position, and the second rear reflector 22 enters the rear reflection position. The second laser is projected onto the second front reflector 42, then reflected onto the second intermediate reflector 32, then onto the second rear reflector 22, and finally onto the laser engraving head 1. When the system switches back to operation of the first laser emitter 5, the second laser emitter 6 stops working. The front adjustment mechanism moves the first front reflector 41 into the first front reflection position, the intermediate switching mechanism moves the first intermediate reflector 31 into the intermediate reflection position, and the rear switching mechanism moves the first rear reflector 21 into the rear reflection position.

[0054] Therefore, when the first laser emitter 5 is working, the first laser is reflected sequentially by the first front reflector 41, the first middle reflector 31, and the first rear reflector 21; when the second laser emitter 6 is working, the second laser is reflected sequentially by the second front reflector 42, the second middle reflector 32, and the second rear reflector 22. Thus, in specific configurations, the first front reflector 41, the first middle reflector 31, and the first rear reflector 21 can be configured with reflective materials having the lowest absorption rate for the first laser; similarly, the second front reflector 42, the second middle reflector 32, and the second rear reflector 22 can be configured with reflective materials having the lowest absorption rate for the second laser. This effectively reduces the absorption of laser energy, lowers absorption loss, and improves laser utilization.

[0055] The front adjustment mechanism includes a linear mechanism for driving the first front reflector 41 to move or a rotary mechanism for driving the first front reflector 41 to rotate.

[0056] The front adjustment mechanism is used to adjust the position of the first front reflector 41, and to move the first front reflector 41 into or out of the first front reflector position. When moving in or out, a linear moving mechanism or a rotary rotating mechanism can be used. When using a linear mechanism, a linear module, such as a linear motor or cylinder, can be used to drive the first front reflector 41 to move linearly. Secondly, when moving, it can move in any horizontal direction, or it can move in a vertical direction or tilt direction, depending on actual needs. When rotating, an eccentric rotation method can be used, such as fixing the first front reflector 41 to the eccentric position of the turntable, and the motor drives the turntable to rotate.

[0057] See Figures 5 to 9 The intermediate switching mechanism includes: an intermediate rotating disk 34, a rotating sleeve 36, and a base plate 33. The intermediate rotating disk 34 has two spaced mounting positions for connecting the first intermediate reflector 31 and the second intermediate reflector 32, respectively. The base plate 33 has a shaft hole and is rotatably connected to a central rotating shaft 310. The lower end of the rotating sleeve 36 is open, and the upper end of the rotating sleeve 36 is fixedly connected to the intermediate rotating disk 34. The inner bottom surface of the rotating sleeve 36 has a shaft hole 362 and is rotatably connected to the upper end of the central rotating shaft 310. An elastic transmission member 39 is connected between the rotating sleeve 36 and the central rotating shaft 310. The central rotating shaft 310 drives the rotating sleeve 36 to rotate through the elastic transmission member 39. The intermediate rotating disk 34 is connected to a positioning module. When one of the first intermediate reflector 31 and the second intermediate reflector 32 is in the intermediate reflection position, the intermediate rotating disk 34 is temporarily positioned by the positioning module, and the elastic transmission member 39 deforms.

[0058] In the design for switching between the first intermediate reflector 31 and the second intermediate reflector 32, this embodiment employs a combination of a central rotating shaft 310 and a central rotating disk 34. The first intermediate reflector 31 and the second intermediate reflector 32 are fixed to the central rotating disk 34, which is indirectly connected to the central rotating shaft 310. An external force drives the central rotating shaft 310, which in turn drives the central rotating disk 34 to rotate, thereby achieving the position switching of the first intermediate reflector 31 and the second intermediate reflector 32 to the intermediate reflection position. However, when switching positions by rotating the central rotating shaft 310 to rotate the central rotating disk 34, the angular position requirements for the rotation of the central rotating disk 34 are extremely stringent due to the laser reflection. Current transmission and drive mechanisms have inherent errors. Therefore, those skilled in the art typically employ high-precision transmission and drive mechanisms, but this inevitably leads to a sharp increase in cost. Therefore, this embodiment uses… The combination of positioning and buffering technologies involves a positioning module that positions the intermediate reflection position of the intermediate rotating disk 34. When the intermediate rotating disk 34 rotates to the intermediate reflection position of either the first intermediate reflector 31 or the second intermediate reflector 32, the positioning module positions the intermediate rotating disk 34, temporarily fixing it and meeting the laser reflection requirements. Simultaneously, a rotating sleeve 36 is added. The rotating sleeve 36 is fixedly connected to the intermediate rotating disk 34 and rotatably connected to the central rotating shaft 310, allowing free rotation between them. The central rotating shaft 310 is connected to the rotating sleeve 36 via an elastic transmission component 39. When the central rotating shaft 310 rotates, the elastic transmission component 39 drives the rotating sleeve 36 to rotate. When the rotating sleeve 36 drives the intermediate rotating disk 34 to the intermediate reflection position of either the first intermediate reflector 31 or the second intermediate reflector 32, the intermediate rotating disk 34 and the rotating sleeve 36 stop rotating. The elastic transmission component 39 may still retain elastic potential energy, but this potential energy is insufficient to cause the positioning module to release the intermediate rotating disk 34. Secondly, when the rotating sleeve 36 is fixedly connected to the intermediate rotating disk 34, methods such as bonding can be used. In this embodiment, see [reference needed]. Figure 8 . Figure 9 The intermediate rotating disk 34 extends downward with a connecting post 342, and the rotating sleeve 36 is provided with a connecting hole 363. The connecting post 342 is inserted into the connecting hole 363, and the intermediate rotating disk 34 and the rotating sleeve 36 are fixedly connected; the connecting post 342 and the connecting hole 363 can be an interference fit connection.

[0059] Understandably, to facilitate the rotation of the rotating sleeve 36 and the intermediate rotating disk 34 to a predetermined position, the rotation angle of the central rotating shaft 310 can be slightly greater than that of the rotating sleeve 36, such as 1-5 degrees greater. For ease of description, the initial setting is as follows: the first intermediate reflector 31 is located in the intermediate reflection position, and the initial rotation angles of the central rotating shaft 310 and the rotating sleeve 36 are both 0 degrees. During switching, the central rotating shaft 310 rotates under external force, and the central rotating shaft 310 applies a pulling force to the rotating sleeve 36 through the elastic transmission member 39. Initially, due to the relatively large positioning force of the positioning module on the intermediate rotating disk 34, the elastic potential energy of the elastic transmission member 39 cannot overcome the force. When the central rotating shaft 310 rotates a certain angle, such as 20 or 30 degrees, the elastic transmission member... When the accumulated elastic potential energy of the elastic transmission component 39 is sufficient to overcome the positioning force of the positioning module on the intermediate turntable, the elastic transmission component 39 drives the rotating sleeve 36 and the intermediate rotating disk 34 to rotate. The positioning module releases the intermediate turntable, and the potential energy of the elastic transmission component 39 gradually decreases and approaches 0. When the second intermediate reflector 32 on the intermediate rotating disk 34 enters the intermediate reflection position, the positioning module repositions the intermediate rotating disk 34, and the intermediate rotating disk 34 and rotating sleeve 36 stop rotating, while the rotation angle of the central rotating shaft 310 exceeds the rotation angle of the rotating sleeve 36. If the rotation angle of the rotating sleeve 36 is A degrees at this time, then the rotation angle of the central rotating shaft 310 is (A+B) degrees; B is 1-5, and A can be 90-180, such as 90, 135, or 180, etc. The elastic transmission component 39 maintains a slight deformation and always exerts a pulling force on the rotating sleeve 36.

[0060] When switching again, the central shaft 310 rotates in the opposite direction under external force. The elastic potential energy of the elastic transmission component 39 first decreases to 0 and then increases. When the elastic potential energy of the elastic transmission component 39 can again overcome the positioning resistance of the positioning module on the intermediate rotating disk 34, the elastic transmission component 39 drives the rotating sleeve 36 to rotate, and the intermediate rotating disk 34 also rotates. The elastic potential energy of the elastic transmission component 39 gradually decreases and approaches 0. When the first intermediate reflector 31 on the intermediate rotating disk 34 enters the intermediate reflection position, the positioning module positions the intermediate rotating disk 34 again, and the intermediate rotating disk 34 and rotating sleeve 36 stop rotating. The rotation angle of the central shaft 310 will successively exceed the rotation angle of the rotating sleeve 36. If the position of the rotating sleeve 36 corresponds to an angle of 0 degrees, and the position of the central shaft 310 corresponds to an angle of -B degrees, the elastic transmission component 39 still has a slight deformation. The range of B can be 1-5.

[0061] During the switching process, the elastic transmission component 39 maintains a slight deformation regardless of whether the first reflector 31 or the second reflector is switched to the intermediate reflection position. The rotation angle of the central rotating shaft 310 is greater than that of the rotating sleeve 36, thus ensuring that the intermediate rotating disk 34 can smoothly switch between the first reflector 31 and the second reflector 32. Furthermore, the central rotating shaft 310 can be rotatably connected to the rotating sleeve 36 and the substrate 33, respectively.

[0062] See Figure 8 The inner side of the rotating sleeve 36 is provided with a plurality of inner protrusions 361, and the side of the central rotating shaft 310 is provided with a plurality of outer protrusions 311. The elastic transmission member 39 is connected between adjacent inner protrusions 361 and outer protrusions 311.

[0063] To ensure that the rotating sleeve 36 rotates along with the central shaft 310, this embodiment employs a following method. An inner protrusion 361 is provided on the inner side of the rotating sleeve 36, and an outer protrusion 311 is provided on the side of the central shaft 310. An elastic transmission element 39 connects adjacent inner and outer protrusions 361 and 311. The elastic transmission element 39 can be an elastic rope, tension spring, etc. After the central shaft 310 rotates, the outer protrusion 311 drives the inner protrusion 361 to move via the elastic transmission element 39, thereby driving the rotating platform to rotate. In this embodiment, there are two inner protrusions 361 and two outer protrusions 311; however, three or more of each can also be provided.

[0064] See Figure 5 , Figure 7 as well as Figure 10 The positioning module includes a positioning sleeve 35, the lower end of which is connected to a base plate 33. The lower end of the positioning sleeve 35 is provided with several positioning posts 351, and the base plate 33 is provided with insertion holes that mate with the positioning posts 351. The upper end of the positioning sleeve 35 is provided with a mounting hole, in which a positioning ball 352 and a second elastic element 353 for pushing the positioning ball 213 outwards are provided. The upper end of the positioning ball 352 abuts against the lower end face of the intermediate rotating disk 34. The lower end face of the intermediate rotating disk 34 is provided with two positioning holes 341, which correspond to the first intermediate reflector 31 and the second intermediate reflector 32. When the first intermediate reflector 31 is in the intermediate reflection position, the upper end of the positioning ball 213 enters one of the positioning holes 341; when the second intermediate reflector 32 is in the intermediate reflection position, the upper end of the positioning ball 352 enters the other positioning hole 341.

[0065] When positioning the intermediate rotating disk 34, the positioning module can only exert force or very little force on the intermediate rotating disk 34 when one of the first reflector 31 or the second reflector 32 is in the intermediate reflection position, in order to avoid hindering the rotation of the intermediate rotating disk 34. In this embodiment, a positioning ball 213 is used in conjunction with a positioning hole 341; two corresponding positioning holes 341 are provided on the lower end face of the intermediate rotating disk 34, and a mounting hole is provided on the upper end of the positioning sleeve 35, in which a second elastic element 353 and a positioning ball 352 are provided. When the first laser emitter 5 is working, the first intermediate reflector 31 is located in the intermediate reflection position, and the positioning ball 352 is engaged in one of the positioning holes 341. When switching is required, the first elastic element applies a pulling force to the rotating sleeve 36, and the intermediate rotating disk 34 overcomes the resistance brought by the positioning ball 352. The intermediate rotating disk 34 pushes the positioning ball 213 towards the positioning hole 341 and rotates until the other positioning hole 341 on the intermediate rotating disk 34 is opposite to the positioning ball 352, and the positioning ball 352 is engaged in the other positioning hole 341. The positioning hole 341 is a spherical cap hole, and its volume is no more than 1 / 2 of the positioning ball 352; it can be 1 / 4, 1 / 3, 1 / 2, etc. of the positioning ball 352.

[0066] See Figure 6 The lower end of the central shaft 310 is connected to an intermediate wheel 38, which is connected to the front adjustment mechanism via a transmission rope assembly 10. A third elastic element 37 for assisting the intermediate wheel 38 in resetting is provided between the intermediate wheel 38 and the base plate 33. When the first intermediate reflector 31 is in the intermediate reflection position, the elastic potential energy of the third elastic element 37 is the minimum. When the second intermediate reflector 32 is in the intermediate reflection position, the elastic potential energy of the third elastic element 37 is the maximum.

[0067] During switching, the front adjustment mechanism, the intermediate switching mechanism, and the rear switching mechanism may operate simultaneously or not. These three mechanisms can be driven by three separate drive devices, which would result in high costs. Secondly, since the distance between these three mechanisms may be relatively far, it would also cause difficulties in wiring. If wireless signal control is used, it would inevitably increase costs. Therefore, this embodiment adopts a linkage structure. The front adjustment mechanism is connected to the intermediate wheel 38 through the transmission rope assembly 10. When the front adjustment mechanism adjusts the position of the first front reflector 41, it drives the intermediate wheel 38 to rotate through the transmission rope assembly 10, which in turn drives the central rotating shaft 310 to rotate, thereby realizing the switching between the first intermediate reflector 31 and the second intermediate reflector 32.

[0068] During operation, the specific steps are as follows: 1. In the initial state, the first laser emitter 5 is working, the first front reflector 41 is located in the front reflection position, and the first middle reflector 31 is located in the middle reflection position; 2. When the second laser emitter 6 is switched to work, the first emitter is not working; the front adjustment mechanism drives the first front reflector 41 to leave the first front reflection position, and at the same time drives the intermediate wheel 38 to rotate through the transmission rope assembly 10. When the intermediate wheel 38 rotates, it drives the central rotating shaft 310 to rotate. At the same time, the deformation of the third elastic element 37 increases, and the elastic potential energy increases; the second elastic element 353 also increases in potential energy. When it can overcome the resistance of the positioning ball 213 on the intermediate rotating disk 34, the central rotating shaft 310 drives the rotating sleeve 36 and the intermediate rotating disk 34 to rotate through the second elastic element 353. When the second reflector 32 is in the intermediate reflection position, the other positioning hole 341 of the intermediate rotating disk 34 engages with the positioning ball 213 to form a plug-in connection. The intermediate rotating disk 34 and the rotating sleeve 36 stop rotating, while the intermediate wheel 38 and the central rotating shaft 310 continue to rotate forward at a small angle and then stop. At this time, the elastic potential energy of the third elastic element 37 reaches its maximum, while the second elastic element 353 still maintains a small elastic potential energy. 3. When switching back to the operation of the first laser emitter 5, the second laser emitter 6 stops working. The front adjustment mechanism drives the first front reflector 41 into the first front reflection position. The front adjustment mechanism will release the transmission rope assembly 10, and the transmission rope assembly 10 will no longer apply power to the intermediate wheel 38. The intermediate wheel 38 loses power, and at this time, the third elastic element 37 releases its own elastic potential energy. The third elastic element 37 drives the intermediate wheel 38 and the central rotating shaft 310 to rotate. The elastic potential energy of the second elastic element 353 gradually decreases to 0 and then increases. When the elastic force of the second elastic element 353 is sufficient to overcome the position ball 352 on the intermediate rotating disk 34... When resistance is encountered, the rotating sleeve 36 and the intermediate rotating disk 34 rotate under the pull of the second elastic element 353; the elastic force of the second elastic element 353 decreases; when the positioning ball 352 engages with the positioning hole 341 of the intermediate rotating disk 34 to form an insertion, the rotating sleeve 36 and the intermediate rotating disk 34 stop rotating, the third elastic element 37 continues to release elastic potential energy, the intermediate rotating wheel and the central rotating shaft 310 continue to rotate at a small angle, and the elastic potential energy of the second elastic element 353 increases slightly; finally, the third elastic element 37 still maintains the minimum elastic potential energy, and the pulling force of the third elastic element 37 and the second elastic element 353 on the central rotating shaft 310 reaches equilibrium. By setting the third elastic element 37 and the transmission rope assembly 10, physical linkage can be achieved.

[0069] See Figures 11 to 15 The rear switching mechanism includes a rear rotating disk 23 and a rear base plate 25; the rear rotating disk 23 is provided with two rotating arms 24, which are respectively connected to the first rear reflector 21 and the second rear reflector 22; the rear base plate 25 is vertically arranged, see [reference]. Figure 14The upper end of the rear base plate 25 is provided with a shaft hole and a rear rotating shaft 212 is rotatably connected thereto. One end of the rear rotating shaft 212 passes through the shaft hole and is connected to the rear rotating disk 23. The lower end of the rear base plate 25 is connected to the laser engraving head 1. It also includes an intermediate shaft 210, a rear drive shaft 29, and a rear positioning unit disposed on the rear base plate 25. The two ends of the intermediate shaft 210 are rotatably connected to the rear drive shaft 29 and the rear rotating shaft 212, respectively. A rear elastic transmission member 211 is connected between the rear drive shaft 29 and the rear rotating shaft 212. The rear rotating disk 23 is provided with two rear positioning holes for positioning with the positioning unit. When the first rear reflector 21 or the second rear reflector 22 is in the reflection position, the rear positioning unit is connected to the rear rotating disk 23 through a corresponding rear positioning hole and prevents the rear rotating disk 23 from rotating.

[0070] The rear switching mechanism uses two rotating arms 24 of the rear rotating disk 23 connected to the first rear reflector 21 and the second rear reflector 22. The rotation of the rear rotating disk 23 switches the first rear reflector 21 and the second rear reflector 22 to the rear reflecting position. Secondly, the rear rotating disk 23 is connected to the rear rotating shaft 212, and the rear rotating shaft 212 is rotatably connected to the rear base plate 25, allowing the rear rotating shaft 212 to rotate freely relative to the rear base plate 25. In specific implementations, the rear rotating shaft 212 can be connected to the rear base plate 25 via bearings to achieve free rotation. It can be understood that the rotation of the rear rotating shaft 212 can be directly controlled to control the switching of the first rear reflector 21 and the second rear reflector 22; however... Because laser reflection requires very high precision, directly controlling the rotation of the rear rotating shaft 212 would require a high-performance drive device, resulting in high costs. If the precision is too low, laser reflection cannot be accurately achieved. Therefore, this application employs a combination of a rear positioning unit, a rear drive shaft 29, and a rear elastic transmission component 211. The rear drive shaft 29 rotates when driven by an external force. The rear drive shaft 29 drives the rear rotating shaft 212 to rotate through the rear elastic transmission component 211, which in turn drives the rear rotating disk 23 to rotate. When the first rear reflector 21 or the second rear reflector 22 enters the rear reflection position, the rear positioning unit positions the rear rotating disk 23 and prevents the rear rotating disk from rotating, thereby ensuring the accuracy of the optical path.

[0071] In the initial state: the first rear reflector 21 is located in the rear reflection position, and the rear positioning unit positions the rear rotating disk 23; during switching, the rear drive shaft 29 rotates under the drive of external force. In the initial stage, the resistance of the rear positioning unit to the rear rotating disk 23 is relatively large, and the rear rotating shaft 212 remains stationary. The rear elastic transmission component continuously deforms and accumulates elastic potential energy; when the elastic potential energy accumulated by the rear elastic transmission component can overcome the resistance of the rear positioning unit to the rear rotating disk 23, the rear rotating disk 23 disengages from the positioning point and rotates, and the rear rotating shaft 212 rapidly... As the rear drive shaft 29 rotates and closely follows the rear elastic drive component 211, the elastic potential energy of the rear elastic drive component 211 gradually decreases. When the second rear reflector 22 enters the rear reflection position, the rear positioning unit positions the rear rotating disk 23 again. At this time, the elastic potential energy of the rear elastic drive component 211 cannot overcome the resistance of the rear positioning unit to the rear rotating disk 23. The rear rotating disk 23 and the rear rotating shaft 212 stop rotating. At this time, the rear drive shaft 29 also stops rotating or continues to rotate a very small angle before stopping. The elastic potential energy of the rear elastic drive component 211 finally remains in a small potential energy state. When switching again, the rear drive shaft 29 rotates in the opposite direction under external force. Similarly, in the initial stage, the resistance of the rear positioning unit to the rear rotating disk 23 is relatively large, and the rear shaft 212 and the rear rotating disk 23 remain stationary. The elastic potential energy of the rear elastic transmission component 211 first decreases to 0 and then continues to increase and accumulate elastic potential energy. When the elastic potential energy accumulated by the rear elastic transmission component 211 can overcome the resistance of the rear positioning unit to the rear rotating disk 23, the rear rotating disk 23 disengages from the positioning point and rotates, and the rear shaft 212 rotates rapidly and tightly. As the rear drive shaft 29 is followed, the elastic potential energy of the rear elastic transmission component 211 gradually decreases. When the first rear reflector 21 enters the rear reflection position, the rear positioning unit repositions the rear rotating disk 23. At this time, the elastic potential energy of the rear elastic transmission component 211 cannot overcome the resistance of the rear positioning unit to the rear rotating disk 23. The rear rotating disk 23 and the rear rotating shaft 212 stop rotating. At this time, the rear drive shaft 29 also stops rotating or continues to rotate a very small angle before stopping. The elastic potential energy of the rear elastic transmission component 211 finally remains in a small potential energy state.

[0072] During the switching process, the rear transmission elastic element 211 needs to accumulate potential energy in the initial stage to overcome the resistance of the rear positioning unit to the rear rotating disk 23. When the first rear reflector 21 or the second rear reflector 22 enters the rear reflection position, the rear positioning unit repositions the rear rotating disk 23. To ensure that the rear rotating disk 23 can drive the first rear reflector 21 and the second rear reflector 22 into the rear reflection position, the rear transmission elastic element 211 always maintains elastic potential energy, i.e., deformation, thereby preventing the rear transmission shaft 29 from failing to drive the rear rotating shaft 212 and the rear rotating disk 23 to the predetermined position. Secondly, the rotation angle range of the rear transmission shaft 29 is greater than that of the rear rotating shaft 212. The rotation angle of the rear transmission shaft 29 has lower precision requirements. Generally, during switching, it is only necessary for the rotation angle of the rear transmission shaft 29 to be greater than the rotation angle of the rear rotating shaft 212 by 0-10 degrees. This ensures that when the positioning unit positions the rear rotating disk 23, the rear transmission elastic element 211 has a small elastic potential energy, which cannot drive the rotating disk to leave the positioning point.

[0073] The two ends of the intermediate shaft 210 can be connected to the rear drive shaft 29 and the rear rotating shaft 212 respectively via bearings, so that the rotation of the rear drive shaft 29 and the rear rotating shaft 212 does not interfere with each other. The rear drive elastic element 211 can be a torsion spring, rubber band, tension spring, etc.

[0074] See Figure 13 , Figure 14 The outer end of the rear drive shaft 29 is connected to a rear rotating wheel 28, which is connected to the front adjustment mechanism or the intermediate switching mechanism via the drive rope assembly 10. (See [reference]). Figure 12 The back of the rear base plate 25 is connected to a cover 26. The rear bottom plate of the cover 26 is provided with a shaft hole that cooperates with the rear drive shaft 29. The rear drive shaft 29 is rotatably connected to the rear bottom plate. A fourth elastic element 27 is connected between the rear bottom plate and the rear rotating wheel 28. When the first rear reflector 21 is in the rear reflection position, the elastic potential energy of the fourth elastic element 27 is the minimum. When the second rear reflector 22 is in the rear reflection position, the elastic potential energy of the fourth elastic element 27 is the maximum.

[0075] When switching, the rear switching mechanism can be driven by an independent drive mechanism; for example, the rear rotating shaft 212 is connected to a servo motor 46, which drives the rotation of the rear rotating shaft 212, thereby driving the rotation of the rear rotating disk 23. In this embodiment, to simplify the structure and reduce costs, a linkage structure is adopted. The front adjustment mechanism directly drives the rear rotating wheel 28 to rotate through the transmission rope assembly 10, or the front adjustment mechanism drives the rear rotating wheel 28 to rotate through the intermediate switching mechanism. Secondly, the transmission rope assembly 10 is a unidirectional transmission when transmitting power, so a fourth elastic element 27 is also used in this embodiment.

[0076] In the initial state, since the fourth elastic element 27 has a small elastic potential energy, the rear drive shaft 29 rotates at a small angle to the side closer to the fourth elastic element 27. The rear drive elastic element 211 also has a small elastic potential energy and remains in balance with the fourth elastic element 27. At this time, the first rear reflector 21 is located in the rear reflection position, the rear positioning unit positions the rear rotating disk 23, the rear rotating disk 23 is displaced at the first positioning point, and the rear drive elastic element 211 cannot drive the rear rotating shaft 212 and the rear rotating disk 23 to rotate. During switching, driven by the front adjustment mechanism, the rear rotating wheel 28 rotates through the transmission rope assembly 10, causing the rear rotating shaft 212 to rotate. The elastic potential energy of the fourth elastic element 27 continuously increases. The elastic potential energy of the rear transmission elastic element 211 first decreases to 0 and then increases and accumulates until the elastic potential energy of the rear transmission elastic element 211 can drive the rear rotating disk 23 to rotate. The rear rotating disk 23 leaves the positioning point. Driven by the rear transmission elastic element, the rear rotating disk 23 rotates along with the rear rotating shaft 212. The elastic potential energy of the rear transmission elastic element 211 decreases and may approach 0. When the second rear reflector 22 enters the rear reflection position, the rear rotating disk 23 and the rear rotating shaft 310 stop rotating. At this time, the rear rotating wheel 28 stops rotating or continues to rotate a small angle, such as 1-3 degrees. The elastic potential energy of the rear transmission elastic element 211 increases slightly, but it is still too small to drive the rear rotating disk 23 to leave the second positioning point. At the same time, the deformation of the fourth elastic element 27 reaches its maximum, with the maximum elastic potential energy.

[0077] When switching again, the front adjustment mechanism releases the transmission rope assembly 10, and the transmission rope assembly 10 no longer applies force to the rotating wheel; the fourth elastic element 27 applies a reverse force to the rotating wheel, causing the rotating wheel to drive the rear transmission shaft 29 to rotate in the opposite direction. The elastic potential energy of the rear transmission elastic element 211 decreases to 0 and then increases until it can drive the rear rotating disk 23 away from the second positioning point. The elastic potential energy of the rear transmission elastic element 211 then decreases again and drives the rear rotating shaft 212 and the rear rotating disk 23 to rotate. When the first rear reflector 21 enters the rear reflection position, the rear rotating disk 23 reaches the first positioning point, and the rear rotating disk 23 and the rear rotating shaft 212 stop rotating. The elastic potential energy of the rear transmission elastic element 211 is too small to drive it. The fourth elastic element 27 continues to drive the rear transmission shaft 29 to rotate a very small angle. The elastic potential energy of the rear transmission elastic element 211 increases and reaches equilibrium with the fourth elastic element 27 again. The fourth elastic element 27 resets to the minimum elastic potential energy state, which is greater than 0. The fourth elastic element 27 can be a torsion spring, tension spring, elastic rope, etc. The cover 26 can support the rear drive shaft 29 and also assist in connecting the fourth elastic element 27. The cover 26 can be connected to the rear drive shaft 29 through bearings to form a rotatable connection.

[0078] See Figure 15The rear substrate 25 is provided with a rear mounting hole. The rear positioning unit includes a fifth elastic member 214 and a positioning ball 352 disposed in the rear mounting hole. When the first rear reflector 21 is in the reflection position, a portion of the positioning ball 352 enters one of the rear positioning holes; when the second rear reflector 22 is in the reflection position, a portion of the positioning ball 352 enters the other rear positioning hole.

[0079] Under the push of the fifth elastic element 214, the positioning ball 352 tends to leave the rear mounting hole. The positioning hole is a spherical crown hole, with 1 / 4 to 1 / 2 of the size of the positioning ball 352. When neither the first rear reflector 21 nor the second rear reflector 22 is in the reflecting position, the positioning ball 352 abuts against the rear substrate 25. When the rear substrate 25 rotates, the positioning ball 352 can also rotate, and the friction between them is relatively small and can be ignored. When the first rear reflector 21 or the second rear reflector 22 is in the reflecting position, the positioning ball 352 enters the rear positioning hole, and the positioning ball 352 forms a locking contact with the rear vertical substrate 33, thereby preventing the rotation of the rear rotating disk 23. Preferably, the positioning hole is 2 / 5, 3 / 7, etc., of the size of the positioning ball 352. Of course, the rear positioning unit can also be a positioning protrusion provided on the rear substrate 25, which mates with the rear positioning hole.

[0080] See Figure 12 The cover 26 has lugs 261 on both sides, and the lugs 261 have connecting grooves 262. The rear base plate 25 has connecting holes, and the cover 26 is fixedly connected to the rear base plate 25 through connectors.

[0081] To facilitate the connection between the cover 26 and the rear substrate 25, lugs 261 are provided on both sides of the cover 26 in this embodiment. The lugs 261 are connected to the rear substrate 25 by a connector, which can be a screw or a bolt.

[0082] See Figure 3 , Figure 4 It also includes an XY moving mechanism 8, which includes an X moving mechanism 81 and Y moving mechanisms 82 located on both sides of the X moving mechanism 81. The X moving mechanism 81 is connected to the Y moving mechanisms 82 on both sides. The rear base plate 25 is connected to the X moving mechanism 81. The intermediate reflector switching mechanism 3 is disposed on the X moving mechanism 81. The transmission rope assembly 10 includes a flexible sleeve and a core wire. The middle part of the core wire is sleeved with the flexible sleeve and can move relative to the flexible sleeve.

[0083] To facilitate planar movement of the laser engraving head 1, this embodiment also includes an XY movement mechanism 8. The Y movement mechanism 82 can drive the X movement mechanism 81 to move longitudinally, and the X movement mechanism 81 drives the rear substrate 25 and the laser engraving head 1 to move laterally, thereby realizing two-dimensional planar movement of the laser engraving head 1. When the laser engraving head 1 moves in a plane, the intermediate reflector switching mechanism 3 also moves longitudinally along with the X-moving mechanism 81. The laser engraving head 1 and the rear substrate 25 move laterally under the drive of the X-moving mechanism 81. Therefore, the rear reflector switching mechanism 2 moves laterally under the drive of the X-moving mechanism 81. It can be seen that the distance between the intermediate reflector switching mechanism 3 and the front reflector adjustment mechanism 4 will change, and the distance between the rear reflector switching mechanism 2 and the intermediate reflector switching mechanism 3 and the front reflector adjustment mechanism 4 will also change. These changes will directly affect the transmission rope assembly 10. In order to ensure that the front reflector adjustment mechanism 4 can still drive the rear reflector switching mechanism 2 and the intermediate reflector switching mechanism 3 through the transmission rope assembly 10 during these changes, in this embodiment, the transmission rope assembly 10 is set as a combination of a flexible sleeve and a core wire. The flexible sleeve is fixed on the frame. If necessary, a drag chain can be set. The flexible sleeve is connected to the drag chain. The flexible sleeve deforms with the drive of the XY moving mechanism 8. The front adjustment mechanism of the front reflector adjustment mechanism 4 is connected to the reflector switching mechanism and the intermediate reflector switching mechanism 3 through the core wire. It is understood that the front adjustment mechanism is connected to the intermediate reflector via the transmission rope assembly 10, and the front adjustment mechanism is connected to the intermediate rotating wheel via the core wire. The front adjustment mechanism is also connected to the rear reflector via another transmission rope assembly 10, and the front adjustment mechanism is connected to the rear rotating wheel 28 via the corresponding core wire. Alternatively, the intermediate reflector switching mechanism 3 is connected to the rear reflector via another transmission rope assembly 10, and the intermediate rotating wheel is connected to the rear rotating wheel 28 via the corresponding core wire. When the XY movement mechanism 8 drives the laser engraving head 1 to perform planar two-dimensional movement, the flexible sleeve and the core wire change accordingly. When switching occurs, the core wire will move relative to the flexible sleeve. For example, the front adjustment mechanism drives the intermediate rotating wheel and the rear rotating wheel 28 to rotate via the core wire; or the front adjustment mechanism releases the core wire, and the intermediate rotating wheel and the rear rotating wheel 28 wind around the core wire. The flexible sleeve can be made of materials such as plastic, silicone, or rubber, and the core wire can be made of metal wire, such as copper wire or steel wire.

[0084] Both the X-moving mechanism 81 and the Y-moving mechanism 82 can adopt linear modules, such as linear motors, lead screws 43 and nut mechanisms, etc., which can adopt existing technologies.

[0085] See Figure 16The linear mechanism includes a bracket, which has a fixedly connected base plate 410 and a vertical support plate 49. The front of the vertical support plate 49 is connected to a vertical guide rail 47 and a vertically arranged servo motor 46. The vertical guide rail 47 is slidably connected to a vertical slider 48. The servo motor 46 is driven by a lead screw 43. The lead screw 43 is threadedly connected to a nut block 45. The nut block 45 is fixedly connected to a lifting block 44. One end of the lifting block 44 is fixedly connected to the vertical slider 48, and the other end of the lifting block 44 is fixedly connected to the first front reflector 41.

[0086] In this embodiment, the front adjustment mechanism adopts a linear mechanism, specifically a vertically arranged linear module. The linear module uses a lead screw 43 and nut structure, driven by a servo motor 46 to rotate the lead screw 43. When the lead screw 43 rotates, the nut block 45 moves up and down along the lead screw 43. To ensure that its movement is linear, this embodiment also provides a vertical guide rail 47 and a vertical slider 48. The vertical slider 48 and the nut block 45 are respectively connected to the lifting block 44. The lifting block 44 moves up and down linearly under the drive of the nut block 45 and the guidance of the vertical slider 48. At the same time, the lifting block 44 drives the first front reflector 41 to move up and down. Secondly, since the position of the second front reflector 42 is always fixed, for ease of installation, it is set on the vertical support plate 49 in this embodiment, but it can also be set on the frame. At the same time, the lifting block 44 is also fixedly connected to the core wire. While the lifting block 44 is lifting, it drives the core wire to move, and the core wire drives the intermediate switching mechanism and the rear switching mechanism in linkage. In this embodiment, in the initial state, the first front reflector 41 is located at the first front reflection position. When switching, the lifting block 44 drives the first front reflector 41 to leave the first front reflection position, the lifting block 44 pulls the core wire, and drives the intermediate switching mechanism and the rear switching mechanism to move synchronously to perform the corresponding switching. The arrangement of the core wire can be wired according to actual needs.

[0087] See Figure 2 N dimming mirrors 7 are provided between the first laser emitter 5 and the first front reflector 41, and / or N dimming mirrors 7 are provided between the second laser reflector and the second front reflector 42.

[0088] In specific settings, the positions of the first laser emitter 5 and the second laser emitter 6 are not fixed and can be set according to the rack configuration. To facilitate the adjustment of the optical path so that the first laser or the second laser is projected onto the first front reflector 41 or the second front reflector 42 in a predetermined direction, a dimming reflector 7 can be set to improve the optical path.

[0089] The above description is only a preferred embodiment of the present invention. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. A dual-laser processing device, comprising: The first laser emitter and the second laser emitter emit the first laser and the second laser respectively. Its features include: a laser engraving head, a rear reflector switching mechanism, a middle reflector switching mechanism, and a front reflector adjustment mechanism; The front reflector adjustment mechanism includes a first front reflector and a second front reflector for reflecting the first laser and the second laser to the intermediate reflector switching mechanism, respectively, and a front adjustment mechanism for adjusting the position of the first front reflector. The intermediate reflector switching mechanism includes a first intermediate reflector and a second intermediate reflector for reflecting the first laser and the second laser to the rear reflector switching mechanism, respectively, and an intermediate switching mechanism for switching the first intermediate reflector and the second intermediate reflector to enter the intermediate reflection position. The rear reflector switching mechanism includes a first rear reflector and a second rear reflector for reflecting the first laser and the second laser to the laser engraving head, respectively, and a rear switching mechanism for switching the first rear reflector and the second rear reflector into the rear reflection position. The subsequent switching mechanism includes: The rear rotating disk has two rotating arms, which are respectively connected to the first rear reflector and the second rear reflector. The rear substrate is vertically arranged; the upper end of the rear substrate is provided with a shaft hole and is rotatably connected to a rear central rotating shaft. One end of the rear central rotating shaft passes through the shaft hole and is connected to the rear rotating disk. The lower end of the rear substrate is connected to the laser engraving head. The intermediate shaft and the rear drive shaft are connected to the rear drive shaft and the rear intermediate shaft at both ends, respectively. A rear elastic transmission component is connected between the rear drive shaft and the rear intermediate shaft. A rear positioning unit is disposed on the rear substrate, and the rear rotating disk is provided with two rear positioning holes for positioning with the positioning unit; when the first rear reflector or the second rear reflector is in the reflection position, the rear positioning unit is connected to the rear rotating disk through a corresponding rear positioning hole and prevents the rear rotating disk from rotating. The outer end of the rear drive shaft is connected to a rear rotating wheel. The rear rotating wheel is connected to the front adjustment mechanism or the intermediate switching mechanism through a drive rope assembly. A cover is connected to the back of the rear base plate. The rear bottom plate of the cover is provided with a shaft hole that mates with the rear drive shaft. The rear drive shaft is rotatably connected to the rear bottom plate. A fourth elastic element is connected between the rear bottom plate and the rear rotating wheel. When the first rear reflector is in the rear reflection position, the elastic potential energy of the fourth elastic element is the minimum. When the second rear reflector is in the rear reflection position, the elastic potential energy of the fourth elastic element is the maximum. The rear substrate is provided with a rear mounting hole. The rear positioning unit includes a fifth elastic member and a positioning ball disposed in the rear mounting hole. When the first rear reflector is in the reflection position, a portion of the positioning ball enters one of the positioning holes; when the second rear reflector is in the reflection position, a portion of the positioning ball enters the other positioning hole.

2. The dual-laser processing device according to claim 1, characterized in that: The cover has lugs on both sides, and the lugs have connecting grooves. The rear base plate has connecting holes, and the cover is fixedly connected to the rear base plate through connectors.

3. The dual-laser processing device according to claim 1, characterized in that: The front adjustment mechanism includes a linear mechanism for driving the first front reflector to move or a rotary mechanism for driving the first front reflector to rotate.

4. The dual-laser processing device according to claim 1, characterized in that: The intermediate switching mechanism includes: an intermediate rotating disk, a rotating sleeve, and a base plate. The intermediate rotating disk has two spaced mounting positions for connecting the first intermediate reflector and the second intermediate reflector, respectively. The base plate has a shaft hole and is rotatably connected to a central rotating shaft. The lower end of the rotating sleeve is open, and the upper end of the rotating sleeve is fixedly connected to the intermediate rotating disk. The inner bottom surface of the rotating sleeve has a shaft hole and is rotatably connected to the upper end of the central rotating shaft. An elastic transmission component is connected between the rotating sleeve and the central rotating shaft, and the central rotating shaft drives the rotating sleeve to rotate through the elastic transmission component. The intermediate rotating disk is connected to a positioning module. When one of the first intermediate reflector or the second intermediate reflector is located in the intermediate reflection position, the intermediate rotating disk is temporarily positioned by the positioning module, and the elastic transmission component deforms.

5. The dual-laser processing device according to claim 4, characterized in that: The inner side of the rotating sleeve is provided with several inner protrusions, and the side of the central rotating shaft is provided with several outer protrusions. The elastic transmission component connects the adjacent inner and outer protrusions.

6. The dual-laser processing apparatus according to claim 5, characterized in that: The positioning module includes a positioning sleeve, the lower end of which is connected to the base plate. The upper end of the positioning sleeve has a mounting hole, and a positioning ball and a second elastic element for pushing the positioning ball outward are provided in the mounting hole. The upper end of the positioning ball abuts against the lower end face of the intermediate rotating disk. The lower end face of the intermediate rotating disk has two positioning holes, which are corresponding to the first and second intermediate reflectors. When the first intermediate reflector is in the intermediate reflection position, the upper end of the positioning ball enters one of the positioning holes; when the second intermediate reflector is in the intermediate reflection position, the upper end of the positioning ball enters the other positioning hole.

7. The dual-laser processing apparatus according to claim 6, characterized in that: The lower end of the central shaft is connected to an intermediate wheel, which is connected to the front adjustment mechanism via a transmission rope assembly. A third elastic element is provided between the intermediate wheel and the base plate to assist in the reset of the intermediate wheel. When the first intermediate reflector is in the intermediate reflection position, the elastic potential energy of the third elastic element is the minimum. When the second intermediate reflector is in the intermediate reflection position, the elastic potential energy of the third elastic element is the maximum.

8. The dual-laser processing apparatus according to claim 5, characterized in that: It also includes an XY moving mechanism, which includes an X moving mechanism and Y moving mechanisms located on both sides of the X moving mechanism. The X moving mechanism is connected to the Y moving mechanisms on both sides. The rear base plate is connected to the X moving mechanism. The intermediate reflector switching mechanism is set in the X moving mechanism. The transmission rope assembly includes a flexible sleeve and a core wire. The middle part of the core wire is sleeved with the flexible sleeve and can move relative to the flexible sleeve.

9. The dual-laser processing apparatus according to claim 3, characterized in that: The linear mechanism includes a bracket, which has a fixedly connected base plate and a vertical support plate. A vertical guide rail and a vertically positioned servo motor are connected to the front of the vertical support plate. A vertical slider is slidably connected to the vertical guide rail. A lead screw is driven by the servo motor. A nut block is threadedly connected to the lead screw. A lifting block is fixedly connected to the nut block. One end of the lifting block is fixedly connected to the vertical slider, and the other end of the lifting block is fixedly connected to the first front reflector.

10. The dual-laser processing apparatus according to claim 1, characterized in that: N dimming mirrors are provided between the first laser emitter and the first front reflector, and / or N dimming mirrors are provided between the second laser reflector and the second front reflector, where N is a positive integer.

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