Adjustable laser welding lens structure

Abstract

The utility model discloses an adjustable laser welding lens structure, which relates to the field of up-down adjustment of collimating mirrors and comprises a shell, a welding nozzle is mounted on the outer wall of the bottom end of the shell, and the top of the shell is connected with a laser generator through an optical fiber connector and an optical fiber. A light source is installed at the output end of the optical fiber connector and located in an inner cavity of the shell, two upper double-layer protection lenses are installed on the upper portion of the inner wall of the shell, a collimating lens is movably connected to the portion, located below the upper double-layer protection lenses, of the inner wall of the shell, and a focus lens is installed at the portion, located below the collimating lens, of the inner wall of the shell. According to the utility model, the rotating assembly is arranged, the threaded rod in the rotating assembly is in threaded connection with the sliding block, and the knob is larger, so that the threaded rod can rotate by a circle by rotating the knob, and the collimating mirror moves upwards or downwards by a distance of a screw pitch at the moment, so that a more accurate adjusting effect is achieved.

Description

Technical Field

[0001] The utility model relates to the field of up and down adjustment of a collimating mirror, in particular to an adjustable laser welding lens structure. Background Art

[0002] There are generally two types of dimming designs for laser welders. The first is to use a collimator to adjust the center point and a condenser to adjust the focus. The second is to use a collimator to adjust the focus and a condenser to adjust the center point.

[0003] In the second adjustment method, the collimator adjusts the focus by moving the collimator up and down. In the prior art, there are many ways to adjust the collimator up and down. During the focusing process, it is necessary to achieve that the laser focus is located above the welding workpiece (generally: 0.3-0.5 mm). Therefore, in order to further achieve the accuracy of the adjustment, an adjustable laser welding lens structure is proposed. Utility Model Content

[0004] The purpose of the present invention is to provide an adjustable laser welding lens structure in order to achieve the purpose set forth in the background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: an adjustable laser welding lens structure, comprising a housing, a welding nozzle mounted on the outer wall of the bottom end of the housing, the top of the housing connected to a laser generator via an optical fiber connector and an optical fiber, the output end of the optical fiber connector located in the inner cavity of the housing and equipped with a light source, two upper double-layer protective lenses mounted above the inner wall of the housing, a collimating lens movably connected to the inner wall of the housing below the upper double-layer protective lenses, a focusing lens mounted on the inner wall of the housing below the collimating lens, and a lower double-layer protective lens mounted on the inner wall of the housing below the focusing lens;

[0006] Adjustment mechanisms are provided on both sides of the inner side of the shell, and the adjustment mechanisms are used to adjust the height of the collimating mirror on the inner wall of the shell. The adjustment mechanism includes a guide component and a rotating component. The guide component is used to limit the moving trajectory of the collimating mirror, and the rotating component is used to drive the collimating mirror to move.

[0007] As a further solution of the present invention: the rotating assembly includes a No. 1 guide rail installed on one side of the inner wall of the outer shell, and a threaded rod is vertically rotatably installed on the inner wall of the No. 1 guide rail, the bottom end of the threaded rod passes through the bottom of the No. 1 guide rail and is coaxially connected to a driven bevel gear, the outer periphery of the driven bevel gear is meshed with a driving bevel gear, the shaft of the driving bevel gear passes through the outside of the outer shell, and the shaft of the driving bevel gear is rotatably connected to the outer shell, and the shaft of the driving bevel gear is located on the outside of the outer shell and is fixedly connected to a knob.

[0008] As a further solution of the present invention: the guide assembly includes a No. 2 guide rail integrally formed on one side of the inner wall of the shell, the No. 2 guide rail is symmetrically distributed with the No. 1 guide rail, and the inner wall of the No. 2 guide rail is vertically fixedly connected with a guide rod.

[0009] As a further solution of the present invention: sliders are integrally formed on both sides of the mounting frame of the collimator mirror and are slidably connected to the inner walls of the guide rail No. 1 and the guide rail No. 2. The slider located on the inner wall of the guide rail No. 2 is slidably connected to the guide rod up and down, and the slider located on the inner wall of the guide rail No. 1 is threadedly connected to the threaded rod.

[0010] As a further solution of the present invention: connecting grooves are vertically opened on the sides of the No. 1 guide rail and the No. 2 guide rail that are close to each other, and the connecting grooves are used for the slider to be connected to the mounting frame of the collimator mirror.

[0011] As a further solution of the present invention: a connecting ring is integrally formed at one end of the knob close to the outer wall of the shell, and an annular groove body is opened on the outer wall of the shell for the connecting ring to rotate, the inner wall of the annular groove body is consistent with the outer wall of the connecting ring, and the inner wall of the annular groove body is provided with a rubber pad.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. By setting up a rotating assembly, the threaded rod in the rotating assembly is threadedly connected to a slider, and the knob is large. Therefore, by turning the knob, the threaded rod can rotate one circle. At this time, the collimator lens moves up or down by a pitch distance, which has a more precise adjustment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of the utility model from another perspective.

[0017] In the figure: 1. Housing; 2. Welding nozzle; 3. Knob; 4. Fiber optic connector; 5. Upper double-layer protective lens; 6. Collimating lens; 7. Focusing lens; 8. Lower double-layer protective lens; 9. Guide rail No. 1; 10. Guide rail No. 2; 11. Threaded rod; 12. Guide rod; 13. Slider; 14. Connecting groove; 15. Driven bevel gear; 16. Driving bevel gear; 17. Connecting ring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figures 1 to 3 In an embodiment of the utility model, an adjustable laser welding lens structure includes a shell 1, a welding nozzle 2 is installed on the outer wall of the bottom end of the shell 1, the top of the shell 1 is connected to the laser generator through an optical fiber connector 4 and an optical fiber, the output end of the optical fiber connector 4 is located in the inner cavity of the shell 1 and a light source is installed, two upper double-layer protective lenses 5 are installed above the inner wall of the shell 1, the inner wall of the shell 1 is located below the upper double-layer protective lenses 5 and is movably connected with a collimating lens 6, the inner wall of the shell 1 is located below the collimating lens 6 and is installed with a focusing lens 7, the inner wall of the shell 1 is located below the focusing lens 7 and is installed with a lower double-layer protective lens 8; adjustment mechanisms are provided on both sides of the inner side of the shell 1, the adjustment mechanism is used to adjust the height of the collimating lens 6 on the inner wall of the shell 1, the adjustment mechanism includes a guide assembly and a rotating assembly, the guide assembly is used to limit the moving trajectory of the collimating lens 6, and the rotating assembly is used to drive the collimating lens 6 to move.

[0020] In this embodiment, when welding thin sheets, the laser focus needs to be adjusted first. By adjusting the rotating assembly and limiting the position of the guide assembly, the rotating assembly drives the collimator 6 to move in the up and down directions until the focus is achieved.

[0021] During welding, the laser generator is started, and the laser enters the light source along the optical fiber and the optical fiber connector 4. The laser is emitted from the light source and passes through the upper double-layer protective lens 5 and contacts the collimating lens 6. The disordered laser becomes parallel light after passing through the collimating lens 6, and continues downward. After being focused by the focusing lens 7, it is emitted through the lower double-layer protective lens 8 to weld the thin sheet material.

[0022] Please refer to Figure 2 and Figure 3The rotating assembly includes a No. 1 guide rail 9 installed on one side of the inner wall of the shell 1. The inner wall of the No. 1 guide rail 9 is vertically rotatably installed with a threaded rod 11. The bottom end of the threaded rod 11 passes through the bottom of the No. 1 guide rail 9 and is coaxially connected to a driven bevel gear 15. The outer periphery of the driven bevel gear 15 is engaged with a driving bevel gear 16. The shaft of the driving bevel gear 16 passes through the outside of the shell 1, and the shaft of the driving bevel gear 16 is rotatably connected to the shell 1. The end of the shaft of the driving bevel gear 16 located outside the shell 1 is fixedly connected to the knob 3. The guide assembly includes a No. 2 guide rail integrally formed on one side of the inner wall of the shell 1 10. The second guide rail 10 is symmetrically distributed with the first guide rail 9. The inner wall of the second guide rail 10 is vertically fixedly connected with a guide rod 12. Sliders 13 that are slidably connected to the inner walls of the first and second guide rails 9 and 10 are integrally formed on both sides of the mounting frame of the collimator 6. The slider 13 located on the inner wall of the second guide rail 10 is slidably connected to the guide rod 12 up and down, and the slider 13 located on the inner wall of the first guide rail 9 is threadedly connected to the threaded rod 11. Connecting grooves 14 are vertically opened on the sides where the first and second guide rails 9 and 10 are close to each other. The connecting grooves 14 are used for the slider 13 to be transmitted out and connected to the mounting frame of the collimator 6.

[0023] In this embodiment, when adjusting the height of the collimator 6, the knob 3 is rotated to drive the active bevel gear 16 to rotate. The rotating active bevel gear 16 drives the driven bevel gear 15 to rotate, and the driven bevel gear 15 drives the threaded rod 11 to rotate. At this time, the slider 13 threadedly connected to the threaded rod 11 moves upward or downward along the inner wall of the first guide rail 9 under its internal thread, and the movement direction is determined by the knob 3.

[0024] The slider 13 threadedly connected to the threaded rod 11 drives the mounting frame of the collimator 6 to move synchronously. At the same time, the mounting frame drives another slider 13 to slide upward or downward along the outer wall of the guide rod 12, thereby achieving the purpose of adjusting the height of the collimator 6.

[0025] Please refer to Figure 3 A connecting ring 17 is integrally formed at one end of the knob 3 close to the outer wall of the shell 1. The outer wall of the shell 1 is provided with an annular groove for the connecting ring 17 to rotate. The inner wall of the annular groove is consistent with the outer wall of the connecting ring 17, and a rubber pad is provided on the inner wall of the annular groove.

[0026] In this embodiment, when the knob 3 is rotated, the knob 3 drives the connecting ring 17 to rotate in the annular groove. During this process, the connecting ring 17 and the rubber pad squeeze and rub against each other, forming a rotation damping effect, thereby preventing the knob 3 from rotating due to a slight force.

[0027] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An adjustable laser welding lens structure, comprising a housing (1), a welding nozzle (2) mounted on the outer wall of the bottom end of the housing (1), a top of the housing (1) connected to a laser generator via an optical fiber connector (4) and an optical fiber, an output end of the optical fiber connector (4) being located in an inner cavity of the housing (1) and a light source being mounted therein, characterized in that: Two upper double-layer protective lenses (5) are installed above the inner wall of the housing (1); a collimating lens (6) is movably connected to the inner wall of the housing (1) below the upper double-layer protective lenses (5); a focusing lens (7) is installed on the inner wall of the housing (1) below the collimating lens (6); and a lower double-layer protective lens (8) is installed on the inner wall of the housing (1) below the focusing lens (7); Adjustment mechanisms are provided on both sides of the inner side of the housing (1), and the adjustment mechanisms are used to adjust the height of the collimator (6) on the inner wall of the housing (1). The adjustment mechanism comprises a guide assembly and a rotation assembly, the guide assembly is used to limit the movement trajectory of the collimator (6), and the rotation assembly is used to drive the collimator (6) to move.

2. The adjustable laser welding lens structure according to claim 1, characterized in that: The rotating assembly comprises a No. 1 guide rail (9) mounted on one side of the inner wall of the housing (1); a threaded rod (11) is vertically rotatably mounted on the inner wall of the No. 1 guide rail (9); the bottom end of the threaded rod (11) passes through the bottom of the No. 1 guide rail (9) and is coaxially connected to a driven bevel gear (15); the outer periphery of the driven bevel gear (15) is meshed with a driving bevel gear (16); the shaft of the driving bevel gear (16) passes through the outside of the housing (1), and the shaft of the driving bevel gear (16) is rotatably connected to the housing (1); and the end of the shaft of the driving bevel gear (16) located outside the housing (1) is fixedly connected to a knob (3).

3. The adjustable laser welding lens structure according to claim 2, characterized in that: The guide assembly comprises a second guide rail (10) integrally formed on one side of the inner wall of the housing (1), the second guide rail (10) being symmetrically distributed with the first guide rail (9), and a guide rod (12) being vertically fixedly connected to the inner wall of the second guide rail (10).

4. The adjustable laser welding lens structure according to claim 3, characterized in that: Slide blocks (13) are integrally formed on both sides of the mounting frame of the collimator (6) and are slidably connected to the inner walls of the No. 1 guide rail (9) and the No. 2 guide rail (10). The slide block (13) located on the inner wall of the No. 2 guide rail (10) is slidably connected to the guide rod (12) in an up-and-down manner, and the slide block (13) located on the inner wall of the No. 1 guide rail (9) is threadedly connected to the threaded rod (11).

5. The adjustable laser welding lens structure according to claim 4, characterized in that: A connecting groove (14) is vertically provided on the side surfaces of the first guide rail (9) and the second guide rail (10) that are close to each other. The connecting groove (14) is used for the slider (13) to be connected to the mounting frame of the collimating mirror (6).

6. The adjustable laser welding lens structure according to claim 5, characterized in that: A connecting ring (17) is integrally formed at one end of the knob (3) close to the outer wall of the housing (1); an annular groove body is provided on the outer wall of the housing (1) for the connecting ring (17) to rotate; the inner wall of the annular groove body matches the outer wall of the connecting ring (17), and a rubber pad is provided on the inner wall of the annular groove body.

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