Double-light-source laser engraving machine

Abstract

The invention relates to the technical field of laser processing, in particular to a double-light-source laser engraving machine. The laser engraving machine comprises a rack, and the rack is provided with two laser emitters, a front reflector assembly, a laser engraving head and a middle reflector unit. The two laser emitters respectively emit first laser and second laser outwards; the front reflector assembly comprises a first front reflector, a second front reflector and a displacement mechanism used for changing the position of the first front reflector or / and the second front reflector. The middle reflector unit comprises a first middle reflector and a second middle reflector, and further comprises a switching mechanism used for switching the positions of the first middle reflector and the second middle reflector. The displacement mechanism is connected with the switching mechanism through the transmission unit and acts synchronously with the switching mechanism. According to the middle reflecting mirror unit, the first front reflecting mirror and the second front reflecting mirror which can be switched are arranged, so that the loss of laser can be effectively reduced, and the utilization rate is improved.

Description

Technical Field

[0001] The invention relates to the technical field of laser processing, and in particular to a dual-light source laser engraving machine. Background Art

[0002] At present, laser engraving machines generally include a laser transmitter, a laser reflection system and a laser engraving head. The laser reflection system reflects the laser emitted by the laser transmitter to the laser engraving head. The laser reflection system is composed of multiple laser reflection mirrors. As we all know, when the reflection mirror reflects the laser, part of the laser is absorbed by the reflection mirror, and the absorption rate of lasers of different wavelengths on the reflection mirror of the same material is also different.

[0003] Secondly, some laser engraving machines currently use dual-light source lasers to cope with a wider range of material processing. The two laser wavelengths of the dual-light source laser are relatively different, but the two lasers share a laser reflection system; in order to take into account the absorption rate of the two lasers by the reflector material, the reflector material generally uses a material with relatively low absorption efficiency for both lasers; resulting in low utilization rates of both lasers. If one reflector in the laser reflection system can be replaced with two switchable reflectors, the two switchable reflectors correspond to the two lasers one by one and have a low or minimum absorption rate, which can effectively improve the utilization rate of the two lasers and reduce energy loss. Summary of the invention

[0004] The purpose of the present invention is to provide a dual-light source laser engraving machine to address the deficiencies of the prior art. The dual-light source laser engraving machine replaces one reflector in the original laser reflection system with two switchable reflectors, which can effectively improve the utilization rate of the laser.

[0005] A dual-light source laser engraving machine comprises a frame, the frame is provided with two laser emitters, a front reflector assembly, a laser engraving head and an intermediate reflector unit; The two laser transmitters respectively emit a first laser and a second laser; The front reflector assembly comprises a first front reflector and a second front reflector for respectively reflecting the first laser and the second laser in the same direction to the intermediate reflector unit, and a displacement mechanism for changing the position of the first front reflector and / or the second front reflector; The intermediate reflector unit includes: a first intermediate reflector and a second intermediate reflector for reflecting the first laser and the second laser to the laser engraving head respectively, and also includes a switching mechanism for switching the positions of the first intermediate reflector and the second intermediate reflector; The displacement mechanism is connected with the switching mechanism through a transmission unit and operates synchronously.

[0006] Furthermore, the displacement mechanism includes a moving device and a rotating device connected to the first front reflector.

[0007] Furthermore, the moving device includes a horizontally or vertically arranged guide rail and a linear module, the guide rail is slidably connected with a guide slider, the guide slider is connected to the first front reflector, and the linear module is connected to the first front reflector and drives the first front reflector to move along the guide rail.

[0008] Furthermore, the switching mechanism comprises: substrate; A rotating disk, the upper surface of which is connected to the first intermediate reflector and the second intermediate reflector, and the first intermediate reflector and the second intermediate reflector are arranged at intervals; A rotating sleeve, the lower end of which is open and the upper end of which is fixedly connected to the rotating disk; The rotating shaft, the upper end of which is rotatably connected to the rotating sleeve, and the rotating shaft can rotate freely relative to the rotating sleeve; the rotating shaft is connected to the displacement mechanism through the transmission unit; and the lower end of the rotating shaft is rotatably connected to the base plate; An elastic transmission unit is connected between the rotating sleeve and the rotating shaft; The positioning unit is connected with the rotating disk or the rotating sleeve. A clamping structure is provided between the positioning unit and the rotating disk or the rotating sleeve. When the first intermediate reflector or the second intermediate reflector is located at the intermediate reflecting position, the positioning unit is clamped with the rotating disk or the rotating sleeve.

[0009] Furthermore, an axial hole matching the rotating shaft is provided in the middle of the upper base plate of the rotating sleeve, the upper end of the rotating shaft is inserted into the axial hole, N inner protrusions extend inward from the inner side surface of the rotating sleeve, and N outer protrusions extend outward from the side surface of the rotating shaft, the outer protrusions and the inner protrusions are staggered, and the elastic transmission unit includes a transmission spring, the transmission spring is arranged between two adjacent inner protrusions and outer protrusions, and the two ends of the transmission spring are respectively abutted against the corresponding inner protrusions and outer protrusions, and N is a natural number.

[0010] Furthermore, the positioning unit includes a positioning sleeve, which is connected to the base plate and is sleeved on the outside of the rotating sleeve. The upper end surface of the positioning sleeve abuts against the lower end surface of the rotating disk or is provided with a gap. The lower end surface of the rotating disk is provided with two positioning holes. The upper end surface of the positioning sleeve is provided with at least one mounting hole. A spring and a positioning ball are provided in the mounting hole. The positioning ball is located above the spring. When the rotating disk rotates to the point where the first intermediate reflector or the second intermediate reflector is located at the intermediate reflection position, the upper end of at least one positioning ball is inserted into a corresponding positioning hole to form a snap connection.

[0011] Preferably, a plurality of connecting posts are extended downward from the lower end of the positioning sleeve, and the base plate is provided with connecting holes matched with the positioning posts, and the connecting posts are inserted into the connecting holes.

[0012] Furthermore, the frame is provided with an XY moving mechanism for driving the laser engraving head to move, the XY moving mechanism includes an X moving mechanism and a Y moving mechanism connected to each other, the Y moving mechanism drives the X moving mechanism to move longitudinally, the X moving mechanism is connected to the laser engraving head and drives the laser engraving head to move laterally; the intermediate reflector unit is arranged on the X moving mechanism; the transmission unit includes a flexible sleeve, a connecting line is arranged in the flexible sleeve, the flexible sleeve is connected to the frame, one end of the connecting line is connected to the displacement mechanism, and the other end of the connecting line is connected to the switching mechanism.

[0013] Furthermore, the rotating shaft is connected to a rotating wheel, the rotating wheel is wound and connected to one end of the connecting line, and the rotating wheel or the rotating shaft is connected to a reset elastic member for driving the rotating shaft to reset.

[0014] Preferably, the resetting elastic member comprises a tension spring, one end of which is connected to the base plate or the positioning sleeve, and the other end of which is connected to the rotating wheel or the rotating shaft.

[0015] Beneficial effects of the present invention: The intermediate reflector unit of the present invention can effectively reduce the loss of laser and improve the utilization rate by being provided with a switchable first front reflector and a second front reflector. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a schematic diagram of the optical path transmission principle of the dual-light source laser engraving machine of this embodiment.

[0017] Figure 2 This is a schematic diagram of the second optical path transmission principle of the dual-light source laser engraving machine in this embodiment.

[0018] Figure 3 It is a structural schematic diagram of the dual-light source laser engraving machine of this embodiment.

[0019] Figure 4 for Figure 3 Another perspective structural diagram of .

[0020] Figure 5 Schematic diagram of the structure of the middle reflector unit in this embodiment.

[0021] Figure 6 for Figure 5 A schematic diagram of the structure without the positioning sleeve.

[0022] Figure 7 It is a schematic diagram of the coordination of the rotating disk, the rotating sleeve, the elastic transmission unit and the rotating shaft.

[0023] Figure 8 for Figure 7 A schematic diagram of the decomposition structure of .

[0024] Fig. 9 for Figure 8Schematic diagram from another perspective.

[0025] Fig.10 It is a structural schematic diagram of the positioning sleeve of this embodiment.

[0026] Fig.11 Schematic diagram of the structure of the front reflector assembly of this embodiment.

[0027] Fig.12 for Fig.11 Schematic diagram from another perspective.

[0028] Reference numerals: 1——Frame; 2——Second laser emitter; 3——Front reflector assembly; 4——Intermediate reflector; 5——First laser emitter; 6——Intermediate reflector unit; 7——XY moving mechanism; 8——Laser engraving head; 9——Transmission unit; 31 - first front reflector; 32 - second front reflector; 33 - lead screw motor; 34 - first front connecting frame; 35 - lead screw; 36 - guide rail; 37 - guide slide block; 38 - vertical plate; 39 - nut block; 310 - second front connecting frame; 61 - first intermediate reflector; 62 - second intermediate reflector; 63 - rotating disk; 64 - positioning sleeve; 65 - rotating sleeve; 66 - resetting elastic member; 67 - rotating wheel; 68 - base plate; 69 - rotating shaft; 610 - elastic transmission unit; 631——positioning hole; 632——plug-in column; 641——connecting column; 642——positioning ball; 651——inner convex block; 652——shaft hole; 691——outer convex block; 71——Y moving mechanism; 72——X moving mechanism. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] The present invention will be described in detail below with reference to the accompanying drawings. Figures 1 to 12 shown.

[0034] Example 1: See Figures 1 to 4 A dual-light source laser engraving machine comprises a frame 1, the frame 1 is provided with two laser emitters, a front reflector assembly 3, a laser engraving head 8 and an intermediate reflector unit 6; The two laser transmitters respectively emit a first laser and a second laser; The front reflector assembly 3 includes a first front reflector 31 and a second front reflector 32 for respectively reflecting the first laser and the second laser in the same direction to the intermediate reflector unit 6, and a displacement mechanism for changing the position of the first front reflector 31 and / or the second front reflector 32; The intermediate reflector unit 6 includes: a first intermediate reflector 61 and a second intermediate reflector 62 for reflecting the first laser and the second laser to the laser engraving head 8 respectively, and also includes a switching mechanism for switching the positions of the first intermediate reflector 61 and the second intermediate reflector 62; The displacement mechanism is connected with the switching mechanism through a transmission unit and operates synchronously.

[0035] In the specific configuration of the dual-light source laser engraving machine of this embodiment, the two laser emitters are emitters of lasers of two different wavelengths, such as: a semiconductor radio frequency laser emitter and a carbon dioxide laser emitter; the two laser emitters can be arranged at different positions of the frame 1, or at adjacent positions; for example, when arranged at adjacent positions, the first laser and the second laser are projected onto the first front reflector 31 and the second front reflector 32 in a parallel manner, see Figure 1The first front reflector 31 and the second front reflector 32 are also arranged adjacent to each other, the first front reflector 31 is located between the second front reflector 32 and the intermediate reflector unit 6, or the second front reflector 32 is located between the first front reflector 31 and the intermediate reflector unit 6.

[0036] The two laser emitters are the first laser emitter 5 and the second laser emitter 2. In the initial state, the first front reflector 31 is located at the first front reflective position, and the first front reflector 31 can reflect the first laser to the intermediate reflector unit 6. The second front reflector 32 can be located at the second front reflective position or at other positions. The first intermediate reflector 61 of the intermediate reflector unit 6 is located at the intermediate reflective position, and the second intermediate reflector 62 is located on one side of the first intermediate reflector 61. At this time, the first laser emitter 5 works and emits the first laser, and the second laser emitter 2 does not work. The first laser can be directly projected onto the first front reflector 31, and reflected by the first front reflector 31 to the first intermediate reflector 61, and then reflected by the first intermediate reflector 61 to the laser engraving head 8.

[0037] When the second laser emitter 2 is working, the first laser emitter 5 is not working; at the same time, the displacement mechanism and the switching mechanism act at the same time, the displacement mechanism moves the first front reflection mirror 31 out of the first front reflection position, if the second front reflection mirror 32 is not in the second front reflection position, then the second front reflection mirror 32 is moved to the second front reflection position at the same time; the switching mechanism moves the first intermediate reflection mirror 61 out of the intermediate reflection position, and at the same time moves the second intermediate reflection mirror 62 into the intermediate reflection position; at this time, the second front reflection mirror 32 reflects the second laser to the second intermediate reflection mirror 62, and the second intermediate reflection mirror 62 then reflects the second laser to the laser engraving head 8.

[0038] The displacement mechanism is linked to the switching mechanism. When implemented, the displacement mechanism can drive the switching mechanism to move, or the switching mechanism can drive the displacement mechanism to move. A transmission unit 9 or a transmission mechanism is arranged between the displacement mechanism and the switching mechanism.

[0039] When the first laser emitter 5 is switched to work again, the second laser emitter 2 stops working; the displacement mechanism moves the first front reflector 31 to the first front reflective position; the second front reflector 32 can be moved or not moved; the switching mechanism moves the first intermediate reflector 61 to the intermediate reflective position, and the second intermediate reflector 62 moves out of the intermediate reflective position. The first front reflector 31 cooperates with the first intermediate reflector 61 to reflect the first laser to the laser engraving head 8.

[0040] See also Figure 2 The frame 1 is provided with a plurality of intermediate reflectors 4 for assisting the first laser to be projected from the first laser emitter 5 to the first front reflector 31 , and / or for assisting the second laser to be projected from the second laser emitter 2 to the second front reflector 32 .

[0041] When the first laser emitter 5 and the second laser emitter 2 are located at different positions of the rack 1, the first laser emitter 5 and / or the second laser emitter 2 can reflect the first laser or the second laser to the corresponding first front reflector 31 and the second front reflector 32 through a plurality of intermediate reflectors 4. Figure 2 As shown, the first laser emitted by the first laser emitter 5 is reflected by the intermediate reflection mirror 4 to the first front reflection mirror 31 .

[0042] Secondly, the displacement mechanism includes a moving device and a rotating device connected to the first front reflector 31.

[0043] The displacement mechanism is mainly used to drive the first front reflector 31 to move into or out of the first front reflective position; as for the second front reflector 32, the displacement mechanism can drive it to move into or out of the second front reflective position; or it can not drive it to move, and the second front reflector 32 can always remain in the second front reflective position. When driving the first front reflector 31 to change its position, a moving device or a rotating device can be used; for example, a linear module is used to drive the first front reflector 31 to move linearly; a rotary motor is used to drive the first front reflector 31 to rotate.

[0044] See also Fig.11 , Fig.12 The moving device includes a horizontally or vertically arranged guide rail 36 and a linear module. The guide rail 36 is slidably connected with a guide slider 37, the guide slider 37 is connected to the first front reflector 31, and the linear module is connected to the first front reflector 31 and drives the first front reflector 31 to move along the guide rail 36.

[0045] The moving device is used to move the first front reflector 31 out of or into the first front reflective position; when the present embodiment is set, the moving device is provided with a bracket, the bracket includes a vertical plate 38, the guide rail 36 and the linear module are fixed to the vertical plate 38, the first front reflector 31 and the second front reflector 32 are respectively connected to the first front connecting frame 34 and the second front connecting frame 310, the second front connecting frame 310 is fixed to the vertical plate 38, so that the second front reflector 32 is fixed to the vertical plate 38, and the position of the second front reflector 32 remains unchanged during the entire processing process. The first front connecting frame 34 is respectively connected to the linear module and the guide slider 37.

[0046] The first front reflector 31 is driven to move up and down or horizontally along the guide rail 36 by setting a linear module. The linear module can be a cylinder, a linear motor, etc. The linear module in this embodiment uses a lead screw motor 33, and the servo motor drives the lead screw 35 to rotate. The length direction of the lead screw 35 is the same as the direction of the guide rail 36, which can be a vertical direction. The lead screw 35 is connected to a nut block 39, and the nut block 39 is respectively connected to the guide slider 37 and the first front connecting frame 34.

[0047] See also Figures 5 to 9 The switching mechanism includes: a substrate 68, a rotating disk 63, a rotating sleeve 65, a rotating shaft 69, an elastic transmission unit 610 and a positioning unit; the upper surface of the rotating disk 63 is connected to the first intermediate reflector 61 and the second intermediate reflector 62, and the first intermediate reflector 61 and the second intermediate reflector 62 are arranged at intervals; the lower end of the rotating sleeve 65 is open, and the upper end of the rotating sleeve 65 is fixedly connected to the rotating disk 63; the upper end of the rotating shaft 69 is rotatably connected to the rotating sleeve 65, and the rotating shaft 69 can rotate freely relative to the rotating sleeve 65; the rotating shaft 69 is connected to the displacement mechanism through the transmission unit; the lower end of the rotating shaft 69 is rotatably connected to the substrate 68; the elastic transmission unit 610 is connected between the rotating sleeve 65 and the rotating shaft 69; the positioning unit is connected to the rotating disk 63 or the rotating sleeve 65, and a clamping structure is provided between the positioning unit and the rotating disk 63 or the rotating sleeve 65, and when the first intermediate reflector 61 or the second intermediate reflector 62 is located at the intermediate reflection position, the positioning unit is clamped with the rotating disk 63 or the rotating sleeve 65.

[0048] The switching mechanism is used to switch the first intermediate reflector 61 and the second intermediate reflector 62 into the intermediate reflective position; the rotating shaft 69 of the switching mechanism is connected to the displacement mechanism through the transmission unit, so that the action of the switching mechanism is synchronized with the action of the displacement mechanism; both the switching mechanism and the displacement mechanism can be active mechanisms and driven mechanisms. In this embodiment, the displacement mechanism is set as an active mechanism. After the displacement mechanism is actuated, the rotating shaft 69 will be driven to rotate through the transmission unit; of course, the switching mechanism can also be used as an active mechanism, such as the rotating shaft 69 is connected to the driving motor through the transmission mechanism, the driving motor drives the rotating shaft 69 to rotate, and drives the displacement mechanism to move through the transmission unit 9. In this embodiment, the displacement mechanism drives the rotating shaft 69 to rotate through the transmission unit 9, the rotating shaft 69 drives the rotating sleeve 65 to rotate through the elastic transmission unit 610, and the rotating sleeve 65 drives the rotating disk 63 to rotate; the rotating shaft 69 stops when it rotates to the first predetermined position, and then the first intermediate reflector 61 or the second intermediate reflector 62 also enters the intermediate reflective position. Since the rotating disk 63 is connected to the rotating sleeve 65, the two rotate synchronously; when the first intermediate reflector 61 or the second intermediate reflector 62 is positioned to enter the intermediate reflection position, whether the rotating disk 63 or the rotating sleeve 65 is positioned, the effect is the same. In this embodiment, the rotating disk 63 is positioned; when positioning is required, the positioning unit is engaged with the rotating disk 63, and the rotating disk 63 and the rotating sleeve 65 stop rotating. At this time, the rotation angle of the rotating shaft 69 can be slightly greater than the rotation angle of the rotating sleeve 65, such as about 0 to 10 degrees, specifically 1, 2, 3, 4, 5, 6 degrees, etc. The elastic transmission unit 610 between the rotating shaft 69 and the rotating sleeve 65 still maintains a weak elastic force, which cannot drive the rotating sleeve 65 to rotate. Of course, the rotation angle of the rotating shaft 69 and the rotation angle of the rotating sleeve 65 can also be equal.

[0049] When the switching mechanism needs to perform a switching action, the rotating shaft 69 rotates in the opposite direction. When the rotating shaft 69 rotates in the opposite phase by a certain angle, such as 20 or 30 degrees, the elastic force accumulated by the elastic transmission unit 610 can overcome the clamping resistance between the positioning unit and the rotating disk 63, and the positioning unit releases the rotating disk 63. The rotating disk 63 and the rotating sleeve 65 begin to rotate with the rotating shaft 69. The rotating shaft 69 rotates to the second predetermined position and stops. The rotating disk 63 continues to rotate until the second intermediate reflector 62 or the first intermediate reflector 61 enters the intermediate reflection position. The rotating disk 63 is clamped with the positioning unit. At this time, the rotation angle of the rotating shaft 69 can be slightly larger than the rotation angle of the rotating sleeve 65, such as about 0 to 10 degrees, specifically 1, 2, 3, 4, 5, 6, etc. The elastic transmission unit 610 between the rotating shaft 69 and the rotating sleeve 65 still maintains a weak elastic force, which cannot drive the rotating sleeve 65 to rotate. Of course, the rotation angle of the rotating shaft 69 and the rotation angle of the rotating sleeve 65 can also be equal.

[0050] The elastic transmission unit 610 and the positioning unit are provided to ensure that the first intermediate reflector 61 or the second intermediate reflector 62 on the rotating disk 63 can accurately enter the intermediate reflective position. At the same time, the provision of the elastic transmission unit 610 also reduces the precision control requirements for the rotation angle of the rotating shaft 69. When the switching mechanism is switched, the rotation angle of the rotating shaft 69 can be within a certain range. In practical applications, due to the long distance, the transmission unit 9 generally uses a wire or rope made of metal material; and the wire and rope themselves have a certain ductility or extensibility. After long-term work, the length of the wire and rope increases, which will lead to a decrease in the accuracy of transmission; after the elastic transmission unit 610 is provided, the rotation angle of the rotating shaft 69 can exceed the rotation angle of the rotating disk 63 to compensate for the increase in the length of the transmission unit 9. That is, in operation, the moving distance of the transmission unit 9 can be appropriately increased to ensure that the rotating disk 63 can rotate to a predetermined position.

[0051] Secondly, it should be noted that: the middle part of the transmission unit 9 can be connected with a transmission mechanism to adjust the different movement strokes of the two ends of the transmission unit 9; in actual applications, one end of the transmission unit 9 moves along with the movement of the first front reflector 31, and the other end of the transmission unit 9 needs to drive the rotating shaft 69 to rotate. The moving distances of the two ends may differ greatly. In order to adjust the movement of the two ends, a transmission mechanism can be set, and the transmission ratio of the transmission mechanism can be used to adjust the strokes of the two ends. For example, by connecting a gear transmission mechanism and transmitting gears of different diameters, the movement stroke can be enlarged or reduced, and then the rotation angle of the rotating shaft 69 can be adjusted. Another example is using a lever as a transmission, and using the displacement of the two ends of the lever to have a stroke difference to adjust the rotation angle of the rotating shaft 69. The rotation connection in this application means that the two connected objects can rotate freely relative to each other.

[0052] See also Figure 8 as well as Fig. 9 The middle part of the upper bottom plate of the rotating sleeve 65 is provided with an axial hole 652 matched with the rotating shaft 69, the upper end of the rotating shaft 69 is inserted into the axial hole 652, the inner side surface of the rotating sleeve 65 has N inner protrusions 651 extending inwardly, and the side surface of the rotating shaft 69 has N outer protrusions 691 extending outwardly, and the outer protrusions 691 are staggered with the inner protrusions 651. The elastic transmission unit 610 includes a transmission spring, which is arranged between two adjacent inner protrusions 651 and outer protrusions 691, and the two ends of the transmission spring are respectively abutted against the corresponding inner protrusions 651 and outer protrusions 691, and N is a natural number.

[0053] The elastic transmission unit 610 is used to transmit torque. This embodiment adopts a combination of a transmission spring, an inner convex block 651, and an outer convex block 691 to transmit the torque of the rotating shaft 69 to the rotating sleeve 65. This structure allows the transmission spring to use a material with lower quality requirements to achieve higher elastic modulus requirements, and drives the rotation through linear elastic deformation, making the structure relatively simple. When working, the rotating shaft 69 rotates first relative to the rotating sleeve 65, the distance between the outer convex block 691 and the inner convex block 651 increases, and the transmission spring between the inner convex block 651 and the outer convex block 691 is deformed. The transmission spring applies a tensile force to the inner convex block 651. Under the action of the tensile force, the inner convex block 651 drives the rotating sleeve 65 to rotate. It can be understood that the elastic transmission unit 610 can also use other elastic elements, such as torsion springs.

[0054] In order to facilitate the connection between the rotating sleeve 65 and the rotating disk 63, the lower end of the rotating disk 63 is provided with a plug-in column 632, and the upper end of the rotating sleeve 65 is provided with a socket, and the plug-in column 632 is connected with the socket by interference fit. Of course, other methods such as bonding, welding, etc. can also be used.

[0055] See also Figure 5 , Figure 8 as well as Fig.10 The positioning unit includes a positioning sleeve 64, which is connected to the base plate 68 and is sleeved on the outside of the rotating sleeve 65. The upper end surface of the positioning sleeve 64 abuts against the lower end surface of the rotating disk 63 or is provided with a gap. The lower end surface of the rotating disk 63 is provided with two positioning holes 631. The upper end surface of the positioning sleeve 64 is provided with at least one mounting hole. A spring (not shown in the figure) and a positioning ball 642 are provided in the mounting hole. The positioning ball 642 is located above the spring. When the rotating disk 63 rotates to the point where the first intermediate reflector 61 or the second intermediate reflector 62 is located at the intermediate reflection position, the upper end of at least one positioning ball 642 is inserted into a corresponding positioning hole 631 to form a snap connection.

[0056] This embodiment adopts a positioning method in which the positioning unit is connected to the rotating disk 63, and the positioning sleeve 64 is provided with a mounting hole; when the rotating disk 63 rotates relative to the positioning sleeve 64, the positioning ball 642 abuts against the rotating disk 63 under the thrust of the spring, and the positioning ball 642 causes less resistance to the rotating disk 63; when the first intermediate reflector 61 on the rotating disk 63 is located at the intermediate reflection position, a positioning hole 631 on the rotating disk 63 is opposite to the positioning ball 642, and the positioning ball 642 enters the positioning hole 631 under the thrust of the spring; the upper end of the positioning ball 642 is not larger than 1 / 2 of the positioning ball 642, and preferably the positioning ball 6 42; at this time, the positioning ball 642 forms a clamping connection with the rotating disk 63, and the resistance formed by the positioning ball 642 to the rotation of the rotating disk 63 becomes the largest; when the rotating disk 63 rotates in the opposite direction, the rotating disk 63 will overcome the resistance of the positioning ball 642 and press the positioning ball 642 downward, and the positioning ball 642 enters the installation hole, but its upper end is still against the lower end surface of the rotating disk 63 under the action of the spring; when the second intermediate reflector 62 on the rotating disk 63 is at the intermediate reflection position, another positioning hole 631 on the rotating disk 63 is opposite to the positioning ball 642; at other times, all the positioning balls 642 are against the lower end surface of the rotating disk 63. Of course, the positioning ball 642 can be directly set without setting the spring.

[0057] It can be understood that three mounting holes can be set on the top of the positioning sleeve 64, and springs and positioning balls 642 are set in the three mounting holes. When the rotating disk 63 rotates back and forth, when the rotating disk 63 rotates to the point where the first intermediate reflector 61 or the second intermediate reflector 62 is located at the intermediate reflection position, two of the positioning balls 642 are inserted into the corresponding two positioning holes 631. For example, the positioning balls 642 are ball A, ball B, and ball C, respectively. When the rotating disk 63 rotates to the point where the first intermediate reflector 61 is located at the intermediate reflection position, ball A and ball B are correspondingly inserted into the two positioning holes 631. When the rotating disk 63 rotates to the point where the second intermediate reflector 62 is located at the intermediate reflection position, ball B and ball C are correspondingly inserted into the two positioning holes 631.

[0058] The positioning and plug-in structure of the positioning sleeve 64 and the rotating disk 63 can be expanded as follows: the rotating disk 63 is provided with N+2 positioning holes 631, and the upper end surface of the rotating sleeve 65 is provided with N+3 mounting holes, each mounting hole is provided with a spring and a positioning ball 642, and when the rotating disk 63 rotates to the point where the second intermediate reflector 62 is located at the intermediate reflection position, N+2 positioning balls 642 are inserted into the corresponding N+2 positioning holes 631, where N is a natural number.

[0059] As a structural change, a clamping structure of the positioning sleeve 64 and the rotating sleeve 65 can also be adopted. For example, the positioning sleeve 64 is sleeved on the outer side of the rotating sleeve 65, and the outer side of the rotating sleeve 65 is provided with two positioning holes 631, and the inner side surface of the positioning sleeve 64 is provided with at least one mounting hole, and a spring and a positioning ball 642 are provided in the mounting hole; when the rotating disk 63 rotates to the point where the first intermediate reflector 61 or the second intermediate reflector 62 is located at the intermediate reflecting position, the outer end of at least one positioning ball 642 extends into the positioning hole 631, and the positioning ball 642 is clamped with the rotating sleeve 65.

[0060] The positioning between the rotating sleeve 65 and the positioning sleeve 64 is utilized to assist in positioning the rotating disk 63 when the rotating disk 63 rotates to the point where the first intermediate reflector 61 or the second intermediate reflector 62 is located at the intermediate reflection position; at other times, the positioning ball 642 abuts against the outer side surface of the rotating sleeve 65 under the action of the spring.

[0061] The spring is used to push the positioning ball 642 out of the mounting hole. It is understandable that, in order to facilitate the spring to act on the positioning ball 642, a seat body can be provided between the positioning ball 642 and the spring, and a spherical curved surface is provided on one side of the seat body close to the positioning ball 642, and cooperates with the positioning ball 642 to facilitate the rotation of the positioning ball 642 and reduce the friction between the positioning ball 642 and the rotating disk 63 or the rotating sleeve 65.

[0062] In order to facilitate the connection between the positioning sleeve 64 and the base plate 68, in this embodiment, the lower end of the positioning sleeve 64 extends downward with a plurality of connecting posts 641, and the base plate 68 is provided with connecting holes that match the positioning posts, and the connecting posts 641 are inserted into the connecting holes. The plug-in method can facilitate the connection between the positioning sleeve 64 and the base plate 68.

[0063] See also Figure 1 , Figure 2 The frame 1 is provided with an XY moving mechanism 7 for driving the laser engraving head 8 to move. The XY moving mechanism 7 includes an X moving mechanism 72 and a Y moving mechanism 71 connected to each other. The Y moving mechanism 71 drives the X moving mechanism 72 to move longitudinally. The X moving mechanism 72 is connected to the laser engraving head 8 and drives the laser engraving head 8 to move laterally. The intermediate reflector unit 6 is arranged on the X moving mechanism 72. The transmission unit includes a flexible sleeve, a connecting line is arranged in the flexible sleeve, and the flexible sleeve is connected to the frame 1. One end of the connecting line is connected to the displacement mechanism, and the other end of the connecting line is connected to the switching mechanism.

[0064] At present, there are generally two ways to perform engraving, one is to drive the laser engraving head 8 to move in the XY direction, and the other is to keep the laser engraving head 8 stationary and move the workbench in the XY direction. In this embodiment, the method of driving the laser engraving head 8 to move is adopted, so an XY moving mechanism 7 is set; wherein two Y moving mechanisms 71 are set, which are respectively set on both sides of the X moving mechanism 72. The two Y moving mechanisms 71 synchronously drive the X moving mechanism 72 to move longitudinally; since the laser engraving head 8 needs to move horizontally and longitudinally during operation; the intermediate reflector unit 6 is convenient for projecting the laser onto the laser engraving head 8, so the intermediate reflector needs to be set on the X moving mechanism 72 and move longitudinally with it; when the intermediate reflector unit 6 moves longitudinally, the connection between the displacement mechanism and the switching mechanism cannot be affected; to solve this problem, the transmission unit 9 in this embodiment adopts a flexible sleeve and a connecting line combination, the flexible sleeve can be connected to the frame 1, and deforms with the longitudinal movement of the X moving mechanism 72; when deformed, it does not affect the length of the connecting line; in the specific setting, a longitudinal drag chain is provided on the frame 1, and the flexible sleeve is fixedly connected to the longitudinal drag chain. The connecting line can be a steel wire, one end of which is connected to the displacement mechanism and the other end is connected to the switching mechanism; no matter how the flexible sleeve moves with the X moving mechanism 72, the displacement mechanism can drive the switching mechanism to move through the connecting line. The flexible sleeve can be a rubber tube, a plastic tube, etc. In this embodiment, one end of the connecting line can be connected to the first front reflector 31, and the movement or rotation of the first front reflector 31 can drive the movement or release of the connecting line. The other end of the connecting line can be connected to the rotating shaft 69, and the connecting line can drive the rotating shaft 69 to rotate. Secondly, when it is necessary to adjust the feeding length of the connecting line, a transmission mechanism can be connected to the middle of the connecting line, and the transmission ratio can be adjusted by the transmission mechanism to adjust the moving distance L1 of the connecting line driven by the movement or rotation of the first front reflector 31, and the angle of rotation of the rotating shaft 69 corresponds to the ratio of the moving distance L2 of the connecting line. For example, the movement or rotation of the first front reflector 31 drives the connecting line connected thereto to move a distance of 10 cm; and the connecting line connected to the rotating shaft 69 moves 5 cm, which can drive the rotating shaft 69 to rotate to a predetermined position. The transmission mechanism can be a gear transmission mechanism, a lever mechanism, etc., and the two ends of the lever of the lever mechanism are respectively connected to the connecting lines on both sides. When the lever rotates, the line distances moved at the two ends are proportional; it can be done by selecting a transmission mechanism with a suitable transmission ratio, and the transmission mechanism can be a prior art.

[0065] See also Figure 6 The rotating shaft 69 is connected to a rotating wheel 67, the rotating wheel 67 is wound and connected with one end of the connecting line, and the rotating wheel 67 or the rotating shaft 69 is connected to a reset elastic member 66 for driving the rotating shaft 69 to reset.

[0066] In this embodiment, the displacement mechanism is connected to the switching mechanism through the transmission unit 9, and drives the switching mechanism to operate. The transmission unit 9 adopts a combination of a flexible sleeve and a connecting line, and the connecting line cannot apply power in two directions to the switching mechanism. Therefore, a reset elastic member 66 is added in this embodiment; when working, in the initial state, the first intermediate reflector 61 is located at the intermediate reflection position, and the reset elastic member 66 has no elasticity or has a small elasticity but is not enough to drive the rotating shaft 69 to rotate; when switching to the second laser emitter 2 to work, the displacement mechanism operates and pulls the connecting line, the connecting line moves relative to the flexible sleeve, the connecting line pulls the rotating wheel 67 to rotate, the rotating wheel 67 drives the rotating shaft 69 to rotate, the reset elastic member 66 is deformed, and the rotating shaft 69 drives the rotating sleeve 65 and the rotating disk 63 to rotate through the elastic transmission unit 610, until the second intermediate reflector 62 rotates to the intermediate reflection position, and the positioning unit is engaged with the rotating sleeve 65 or the rotating disk 63. When switching to the first laser generator again, the displacement mechanism is activated and the connecting line is released, the reset elastic member 66 pulls the rotating shaft 69 or the rotating wheel 67 to rotate in the opposite direction, and the connecting line moves in the opposite direction. When the elastic transmission unit 610 accumulates enough tension to drive the rotating disk 63 to move, the rotating disk 63 or the rotating sleeve 65 is released from the positioning unit until the rotating disk 63 rotates to the second intermediate reflector 62 is located in the intermediate reflection position, and the rotating disk 63 or the rotating sleeve 65 is engaged with the positioning unit again.

[0067] See also Figure 6 The resetting elastic member 66 includes a tension spring, one end of which is connected to the base plate 68 or the positioning sleeve 64 , and the other end of which is connected to the rotating wheel 67 or the rotating shaft 69 .

[0068] In this embodiment, the angle between the position of the first intermediate reflector 61 and the second intermediate reflector 62 and the line connecting the center of the rotating circle is approximately 90 degrees. During the switching rotation of the rotating disk 63, the rotation angle of the rotating shaft 69 and the rotating wheel 67 does not exceed 100 degrees, so a tension spring can be provided to drive the rotating shaft 69 or the rotating wheel 67 to reset. During the working process, the tension spring will not be wound around the rotating shaft 69 and the rotating wheel 67. Secondly, it can be understood that the reset elastic member 66 can also be other, such as a torsion spring, and is provided between the frame 1 and the rotating shaft 69.

[0069] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A dual-light source laser engraving machine, comprising a frame, characterized in that: The frame is equipped with two laser transmitters, a front reflector assembly, a laser engraving head, and an intermediate reflector unit; The two laser transmitters respectively emit a first laser and a second laser; The front reflector assembly comprises a first front reflector and a second front reflector for respectively reflecting the first laser and the second laser in the same direction to the intermediate reflector unit, and a displacement mechanism for changing the position of the first front reflector and / or the second front reflector; The intermediate reflector unit includes: a first intermediate reflector and a second intermediate reflector for reflecting the first laser and the second laser to the laser engraving head respectively, and also includes a switching mechanism for switching the positions of the first intermediate reflector and the second intermediate reflector; The displacement mechanism is connected with the switching mechanism through a transmission unit and operates synchronously.

2. The dual-light source laser engraving machine according to claim 1, characterized in that: The displacement mechanism includes a moving device and a rotating device connected to the first front reflecting mirror.

3. The dual-light source laser engraving machine according to claim 2, characterized in that: The moving device includes a horizontally or vertically arranged guide rail and a linear module. The guide rail is slidably connected with a guide slider, the guide slider is connected to the first front reflector, and the linear module is connected to the first front reflector and drives the first front reflector to move along the guide rail.

4. The dual-light source laser engraving machine according to claim 1, characterized in that: The switching mechanism comprises: substrate; A rotating disk, the upper surface of which is connected to the first intermediate reflector and the second intermediate reflector, and the first intermediate reflector and the second intermediate reflector are arranged at intervals; A rotating sleeve, the lower end of which is open and the upper end of which is fixedly connected to the rotating disk; The rotating shaft, the upper end of which is rotatably connected to the rotating sleeve, and the rotating shaft can rotate freely relative to the rotating sleeve; the rotating shaft is connected to the displacement mechanism through the transmission unit; and the lower end of the rotating shaft is rotatably connected to the base plate; An elastic transmission unit is connected between the rotating sleeve and the rotating shaft; The positioning unit is connected with the rotating disk or the rotating sleeve. A clamping structure is provided between the positioning unit and the rotating disk or the rotating sleeve. When the first intermediate reflector or the second intermediate reflector is located at the intermediate reflecting position, the positioning unit is clamped with the rotating disk or the rotating sleeve.

5. The dual-light source laser engraving machine according to claim 5, characterized in that: An axial hole matching the rotating shaft is provided in the middle of the upper base plate of the rotating sleeve, and the upper end of the rotating shaft is inserted into the axial hole. N inner protrusions extend inward from the inner side surface of the rotating sleeve, and N outer protrusions extend outward from the side surface of the rotating shaft. The outer protrusions are staggered with the inner protrusions. The elastic transmission unit includes a transmission spring, which is arranged between two adjacent inner protrusions and outer protrusions, and the two ends of the transmission spring are respectively abutted against the corresponding inner protrusions and outer protrusions, and N is a natural number.

6. The dual-light source laser engraving machine according to claim 5, characterized in that: The positioning unit includes a positioning sleeve, which is connected to the base plate and is sleeved on the outside of the rotating sleeve. The upper end surface of the positioning sleeve abuts against the lower end surface of the rotating disk or is provided with a gap. The lower end surface of the rotating disk is provided with two positioning holes. The upper end surface of the positioning sleeve is provided with at least one mounting hole. A spring and a positioning ball are provided in the mounting hole. The positioning ball is located above the spring. When the rotating disk rotates to the point where the first intermediate reflector or the second intermediate reflector is located at the intermediate reflection position, the upper end of at least one positioning ball is inserted into a corresponding positioning hole to form a snap connection.

7. The dual-light source laser engraving machine according to claim 5, characterized in that: A plurality of connecting posts are extended downward from the lower end of the positioning sleeve, and the base plate is provided with connecting holes matched with the positioning posts, and the connecting posts are inserted into the connecting holes.

8. The dual-light source laser engraving machine according to claim 5, characterized in that: The frame is provided with an XY moving mechanism for driving the laser engraving head to move, the XY moving mechanism includes an X moving mechanism and a Y moving mechanism connected to each other, the Y moving mechanism drives the X moving mechanism to move longitudinally, the X moving mechanism is connected to the laser engraving head and drives the laser engraving head to move laterally; the intermediate reflector unit is arranged on the X moving mechanism; the transmission unit includes a flexible sleeve, a connecting line is arranged in the flexible sleeve, the flexible sleeve is connected to the frame, one end of the connecting line is connected to the displacement mechanism, and the other end of the connecting line is connected to the switching mechanism.

9. The dual-light source laser engraving machine according to claim 8, characterized in that: The rotating shaft is connected with a rotating wheel, the rotating wheel is wound and connected with one end of the connecting line, and the rotating wheel or the rotating shaft is connected with a resetting elastic member for driving the rotating shaft to reset.

10. The dual-light source laser engraving machine according to claim 9, characterized in that: The resetting elastic member comprises a tension spring, one end of which is connected to the base plate or the positioning sleeve, and the other end of which is connected to the rotating wheel or the rotating shaft.

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