Double-focusing structure device and laser head

Abstract

The utility model relates to a double-focusing structure device and a laser head. The double-focusing structure device comprises a lens base, a lens barrel, a driving structure, a first manual adjusting part and a second manual adjusting part. The driving structure is composed of a first gear and a second gear which are meshed with each other. One end of the first manual adjusting piece is rotatably connected with the lens base and inserted into the lens barrel, and the other end is fixedly connected with the first gear; and the second manual adjusting piece is fixedly connected with the second gear. The lens barrel can be switched between a coarse adjustment state and a fine adjustment state: in the coarse adjustment state, the first manual adjustment part is rotated to drive the lens barrel to move along the axial direction of the lens base so as to realize the coarse adjustment of the focus; in the fine adjustment state, the second manual adjustment piece is rotated to drive the first manual adjustment piece through gear transmission, and then fine adjustment of the focus of the lens cone is achieved. According to the invention, the focusing control complexity is reduced, the focusing efficiency and precision are improved, and a compact and integrated dual-mode focusing function is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of laser cutting, and in particular to a double-focusing structure device and a laser head. BACKGROUND

[0002] In industrial applications, manual laser heads have always occupied a stable position in the market due to their compact structure, high reliability and low maintenance cost, and are particularly suitable for space-limited scenarios. In contrast, in the traditional technical solutions for automatic laser head focal length adjustment, two independent drive structures are usually used to achieve multi-stage focusing: one drive structure controls the axial displacement of the lens barrel in the lens seat to achieve coarse focusing, and the other drive structure adjusts the axial movement of the lens in the lens barrel to achieve fine focusing. However, this double-drive structure not only increases the complexity and overall volume of the mechanical system, but also requires the configuration of two independent control systems, resulting in a decrease in focusing efficiency due to the difficulty of cooperative control, and it is difficult to meet the needs of fast coarse focusing and fine focusing in the same system. Therefore, it is of great practical significance to design a double-focusing structure device with compact structure and high degree of functional integration. SUMMARY

[0003] Therefore, the purpose of the present application is to provide a double-focusing structure device and a laser head.

[0004] In a first aspect, the embodiments of the present application provide a double-focusing structure device, comprising:

[0005] a lens seat and a lens barrel, the lens barrel being slidingly installed in the lens seat;

[0006] a drive structure, the drive structure comprising a first gear and a second gear, the first gear and the second gear being meshed with each other;

[0007] a first manual adjustment member, one end of the first manual adjustment member being rotatably connected to the lens seat and inserted into the lens barrel, and the other end being fixedly connected to the first gear;

[0008] a second manual adjustment member, the second manual adjustment member being fixedly connected to the second gear;

[0009] the lens barrel can be switched between a coarse adjustment state and a fine adjustment state:

[0010] when the lens barrel is in the coarse adjustment state, the first manual adjustment member is driven to rotate, the first manual adjustment member drives the lens barrel to move axially along the lens seat, and the coarse focusing of the lens barrel is realized;

[0011] When the lens barrel is converted from the coarse adjustment state to the fine adjustment state, the second manual adjustment member is driven to rotate, the second manual adjustment member drives the second gear and the first gear to rotate, the first gear drives the first manual adjustment member to rotate, and then the first manual adjustment member drives the lens barrel to move along the axial direction of the lens seat, so that the focal length of the lens barrel is finely adjusted.

[0012] In some embodiments, the first manual adjustment member comprises an adjustment knob and a first connecting rod, one end of the first connecting rod is rotationally connected with the lens seat, and the other end of the first connecting rod is fixedly connected with the adjustment knob.

[0013] In some embodiments, a limiting plate is arranged, and a through hole is arranged on the limiting plate, the through hole is arranged on the outer periphery of the adjustment knob, and the limiting plate is fixedly connected with the lens seat.

[0014] In some embodiments, the pitch circle diameter of the first gear is greater than the pitch circle diameter of the second gear.

[0015] In some embodiments, the pressure angle of the first gear and the second gear is 20°, and the modulus is 0.5.

[0016] In some embodiments, the lens seat is provided with a limiting groove, and the end of the adjustment knob is arranged in the limiting groove.

[0017] In some embodiments, the second manual adjustment member is rotationally connected with the limiting plate.

[0018] In some embodiments, the first manual adjustment member further comprises a first sealing ring and a second sealing ring, the first sealing ring is arranged between the end of the adjustment knob and the limiting groove, and the second sealing ring is arranged between the adjustment knob and the limiting plate.

[0019] In some embodiments, an arc-shaped groove is arranged in the limiting groove, and the first connecting rod is movably connected with the lens seat through the arc-shaped groove.

[0020] In a second aspect, the embodiments of the present application provide a laser head comprising the double-focusing structure device.

[0021] The present application can achieve the following beneficial effects:

[0022] The application relates to a double-focusing structure device and a laser head, which comprises a mirror seat, a lens barrel, a driving structure, a first manual adjusting part and a second manual adjusting part. The driving structure is composed of a first gear and a second gear which are engaged with each other; the lens barrel can be switched between a coarse adjustment state and a fine adjustment state; in the coarse adjustment state, rotating the first manual adjusting part can directly drive the lens barrel to move axially along the mirror seat, so that coarse adjustment of a focal point is realized; in the fine adjustment state, rotating the second manual adjusting part drives the first manual adjusting part to rotate through the engagement transmission of the second gear and the first gear, and then drives the lens barrel to move axially along the mirror seat, so that fine adjustment of the focal point is realized. The application realizes the coarse adjustment and fine adjustment functions through a single driving structure, simplifies mechanical design, and improves structural compactness. Meanwhile, through cooperation of the first manual adjusting part, the second manual adjusting part and the driving structure, switching of the focusing mode is realized, control complexity is reduced, focusing efficiency and precision are improved, and compact and integrated double-mode focusing functions are realized.

[0023] In order to make the above objectives, characteristics and advantages of the application more apparent, clear and easy to understand, the following preferred embodiments are specifically described below, and the accompanying drawings are referred to for detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the application, and therefore should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0025] Figure 1 The overall structure of the application is shown Figure 1 ;

[0026] Figure 2 The overall structure of the application is shown Figure 2 ;

[0027] Figure 3 The side view structure of the driving structure of the application is shown

[0028] Figure 4 The cross-sectional view of the application in A-A direction is shown

[0029] Figure 5 The cross-sectional view of the application in B-B direction is shown

[0030] In the figure, 1, mirror seat; 2, lens barrel; 3, driving structure; 4, first manual adjusting part; 5, second manual adjusting part; 6, limiting plate; 7, groove; 8, horizontal limiting groove; 9, vertical limiting groove; 101, limiting groove; 102, arc-shaped groove; 301, first gear; 302, second gear; 401, adjusting knob; 402, first connecting rod; 403, first sealing ring; 404, second sealing ring; 501, bearing; 601, through hole; 701, elastic piece; 901, guide screw. DETAILED DESCRIPTION

[0031] The terms "comprise", "comprising", "contain", "containing", or "characterized by" in the specification and claims of this application and the drawings are synonymous with "include", "including", or "characterized by" and are inclusive or open-ended and do not exclude additional, unrecited elements or method steps. "Comprising" is a term of art that is used in the patent law to mean that the structure or method comprising the recited elements is included, but not to the exclusion of additional elements or method steps.

[0032] It should be noted that similar reference numerals and letters refer to similar items in the accompanying drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings. In addition, the terms "first", "second", "third", etc. are used only to distinguish descriptions, and cannot be understood as indicating or implying relative importance.

[0033] The laser cutting technology has been very mature with the development of industry. At present, the laser head mainly has two types of manual and automatic. The manual laser head has the advantages of compact structure, reliability, low maintenance cost, and obvious application advantages in space limited scene. Although the automatic laser head has the ability of fast focusing and high precision positioning, it has poor adaptability in narrow space or dynamic application due to the complex structure and large volume.

[0034] The focal length adjustment technology of the automatic laser head usually adopts two independent driving structures for rough adjustment of the lens barrel axial displacement and fine adjustment of the lens axial movement. However, this design makes the mechanical system extremely complex, and also increases the overall volume. At the same time, two independent control systems correspond to different driving structures, which makes the cooperative control in the focusing process extremely complex.

[0035] Therefore, the application provides a double focusing structure device and a laser head, which solves the problem of fine focusing without increasing the internal space of the laser head cavity.

[0036] With reference to the drawings of the embodiments herein, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0037] Reference herein to“an embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive or alternative embodiments to one another. It is explicitly and implicitly understood that the embodiments described herein can be combined with other embodiments.

[0038] Referring to Figure 1 and Figure 2 , a dual-focus structure device in the embodiment comprises:

[0039] a lens seat 1 and a lens barrel 2, the lens barrel 2 being slidingly installed in the lens seat 1;

[0040] a driving structure 3, the driving structure 3 comprising a first gear 301 and a second gear 302, the first gear 301 and the second gear 302 being in mesh with each other;

[0041] a first manual adjusting member 4, one end of the first manual adjusting member 4 being rotatably connected with the lens seat 1 and being inserted into the lens barrel 2, the other end of the first manual adjusting member 4 being fixedly connected with the first gear 301;

[0042] a second manual adjusting member 5, the second manual adjusting member 5 being fixedly connected with the second gear 302;

[0043] the lens barrel 2 being switchable between a coarse adjustment state and a fine adjustment state, when the lens barrel 2 is in the coarse adjustment state, the first manual adjusting member 4 is driven to rotate, the first manual adjusting member 4 drives the lens barrel 2 to move axially along the lens seat 1, so as to realize coarse adjustment of the focal length of the lens barrel 2;

[0044] when the lens barrel 2 is switched from the coarse adjustment state to the fine adjustment state, the second manual adjusting member 5 is driven to rotate, the second manual adjusting member 5 drives the second gear 302 and the first gear 301 to rotate, the first gear 301 drives the first manual adjusting member 4 to rotate, and then the first manual adjusting member 4 drives the lens barrel 2 to move axially along the lens seat 1, so as to realize fine adjustment of the focal length of the lens barrel 2.

[0045] The gap between the mirror seat 1 and the side wall of the lens barrel 2 is 0.1mm, which ensures the smooth movement of the lens barrel 2 in the mirror seat 1; the upper and lower ends of the lens barrel 1 are provided with grooves 7, and elastic members 701 are installed in the grooves 7, which can keep the position of the lens barrel 1 after movement. At the same time, the driving structure 3 is covered with an outer shell, and the outer shell is provided with circular holes for exposing the first manual adjusting member 4 and the second manual adjusting member 5. The first gear 301 and the second gear 302 that mesh with each other have the same modulus and pressure angle.

[0046] It should be noted that, referring to Figure 3 , the first manual adjusting member 4 and the second manual adjusting member 5 are both provided with an internal hexagonal structure, and by inserting a tool into the internal hexagonal structure, the first manual adjusting member 4 and the second manual adjusting member 5 can be driven to rotate in both forward and reverse directions. However, the application does not make specific limitations on the manual mode, and any implementation that can drive the first manual adjusting member 4 and the second manual adjusting member 5 to rotate belongs to the protection scope of the application.

[0047] In addition, the fixed connection between the first manual adjusting member 401 and the first gear 301 can be screw connection, the first gear 301 is "convex", and is sleeved on the first manual adjusting member 4. The convex part of the first gear 301 has a U-shaped notch, and the screw passes through the U-shaped notch to tightly connect the first manual adjusting member 401. The driving structure 3 connects the first manual adjusting member 4 and the second manual adjusting member 5, which reduces the complexity and volume of the focusing structure, and uses two manual adjusting members to control the coarse and fine adjustment of the focal length, which is more intuitive and convenient to operate.

[0048] In some embodiments, referring to Figure 4 , the first manual adjusting member 4 includes an adjusting knob 401 and a first connecting rod 402, one end of the first connecting rod 402 is rotationally connected with the mirror seat 1, and the other end is fixedly connected with the adjusting knob 401.

[0049] As a further implementation, a limiting plate 6 is included, and the limiting plate 6 is provided with a through hole 601, the through hole 601 is sleeved on the outer periphery of the adjusting knob 401, and the limiting plate 6 is fixedly connected with the mirror seat 1.

[0050] In the above, the through hole 601 can guide and limit the rotation of the adjusting knob 401, ensuring that the adjusting knob 401 maintains a stable axial position during rotation, thereby improving the reliability of focusing. Fixing the limiting plate 6 with the mirror seat 1 can reduce the structural shaking caused by manual adjustment or external vibration, and increase the overall structural stability.

[0051] In some embodiments, the first gear 301 has a larger pitch circle diameter than the second gear 302.

[0052] As mentioned above, the first gear 301 and the second gear 302 have the same module and pressure angle. According to the principle of gear design, the relationship between the pitch circle diameter of a gear and the number of teeth and the module is: pitch circle diameter = number of teeth × module, that is, the more the number of teeth, the larger the pitch circle diameter. In gear transmission, the rotational speed of a gear is inversely proportional to the number of teeth, that is, the more the number of teeth, the lower the rotational speed. Therefore, the pitch circle diameter is inversely proportional to the rotational speed. In the present embodiment, the second gear 302 drives the first gear 301 to rotate, and precise adjustment is achieved by reducing the rotational speed. To achieve this purpose, the pitch circle diameter of the first gear 301 needs to be larger than that of the second gear 302.

[0053] As a further embodiment, the pressure angle of the first gear 301 and the second gear 302 is 20°, and the module is 0.5. A smaller pressure angle and module help to improve the smoothness of gear transmission and minimize errors, achieving more precise focusing.

[0054] In some embodiments, the mirror holder 1 is provided with a limiting groove 101, and the end of the adjusting knob 401 is installed in the limiting groove 101.

[0055] In actual operation, when the adjusting knob 401 is subjected to a rotating force, it may deviate from the center due to uneven force or other factors, affecting the accuracy of the axial displacement of the lens barrel 2. Therefore, the limiting groove 101 can limit the adjusting knob 401 in the up-down and left-right directions, and under the cooperation of the limiting plate 6, it ensures that the adjusting knob 401 can accurately drive the lens barrel 2 to move axially, improving the accuracy of focusing.

[0056] In some embodiments, referring to Figure 5 , the second manual adjusting member 5 is rotationally connected with the limiting plate 6.

[0057] Specifically, the second manual adjusting member 5 has a bearing 501 at the end, the inner ring of the bearing 501 is axially interference-fitted with the second manual adjusting member 5, and the outer ring of the bearing 501 is interference-fitted with the limiting plate 6, which can ensure that the second manual adjusting member 5 is in a fixed state while being able to rotate circumferentially.

[0058] In some embodiments, Figure 1 and Figure 5The first manual adjusting part 4 further comprises a first sealing ring 403 and a second sealing ring 404, the first sealing ring 403 is located between the end of the adjusting knob 401 and the limiting groove 101, and the second sealing ring 404 is located between the end of the adjusting knob 401 and the limiting plate 6.

[0059] It should be noted that, in order to enable flexible rotation of each rotating part and ensure the accuracy of focusing, a certain gap is left between each rotating part, and the focal length adjusting function is realized by adjusting the distance between the laser focal point and the cutting object. In order to ensure the cutting effect of the laser head and the normal work of the optical element, the optical path system needs to be kept clean. Therefore, the sealing ring can prevent external light from entering the optical path and causing optical path pollution, and can also play a dustproof role.

[0060] In some embodiments, an arc-shaped groove 102 is arranged in the limiting groove 101, and the first connecting rod 402 is movably connected to the lens seat 1 through the arc-shaped groove 102.

[0061] Specifically, the shape of the arc-shaped groove 102 needs to be matched with the motion track of the first connecting rod 402. During the focal length adjusting process, the arc-shaped groove 102 limits the relative movement of the first connecting rod 402, so that the movement of the lens barrel 2 is more stable.

[0062] In order to match the rotation of the first connecting rod 402 in the arc-shaped groove 102 to drive the up-and-down movement of the lens barrel 2 in the lens seat 1, a horizontal limiting groove 8 is arranged on the lens barrel 2, the first connecting rod 402 is inserted into the horizontal limiting groove 8 through the arc-shaped groove 102, and through the cooperation of the horizontal limiting groove 8 and the arc-shaped groove 102, the circular motion of the first manual adjusting part 4 can be converted into the linear motion of the up-and-down movement of the lens barrel 2.

[0063] In addition, a vertical limiting groove 9 is opened on the side wall of the lens barrel 2, and a guide screw 901 corresponding to the vertical limiting groove 9 is arranged on the side wall of the lens seat 1. With the up-and-down movement of the lens barrel 2, the guide screw 901 limits the circumferential movement of the lens barrel 2.

[0064] The application further provides a laser head comprising the double-focusing structure device.

[0065] The above has introduced the embodiments of the application in detail, and the principles and implementation manners of the application have been described by applying specific examples; the above embodiment descriptions are only used to help understand the method of the application and its core idea; meanwhile, for those skilled in the art, according to the idea of the application, the specific implementation manner and application range can be changed; in conclusion, the content of the specification should not be understood as the limitation of the application.

Claims

1. A dual focus structure apparatus, characterized by, include: A lens mount (1) and a lens tube (2), wherein the lens tube (2) is slidably mounted in the lens mount (1); The drive structure (3) includes a first gear (301) and a second gear (302), which mesh with each other; The first manual adjustment component (4) has one end rotatably connected to the lens base (1) and inserted into the lens barrel (2), and the other end is fixedly connected to the first gear (301); The second manual adjustment component (5) is fixedly connected to the second gear (302); The lens tube (2) can switch between coarse adjustment and fine adjustment modes: When the lens barrel (2) is in the coarse adjustment state, the first manual adjustment component (4) is driven to rotate, and the first manual adjustment component (4) drives the lens barrel (2) to move along the lens mount (1) axially, thereby realizing the coarse adjustment of the focal length of the lens barrel (2). When the lens barrel (2) changes from the coarse adjustment state to the fine adjustment state, the second manual adjustment component (5) is driven to rotate. The second manual adjustment component (5) drives the second gear (302) and the first gear (301) to rotate. The first gear (301) drives the first manual adjustment component (4) to rotate. Then the first manual adjustment component (4) drives the lens barrel (2) to move along the axial direction of the lens mount (1) to achieve fine adjustment of the focal length of the lens barrel (2).

2. A dual-focus structure device according to claim 1, wherein The first manual adjustment component (4) includes an adjustment knob (401) and a first connecting rod (402). One end of the first connecting rod (402) is rotatably connected to the mirror base (1), and the other end is fixedly connected to the adjustment knob (401).

3. A dual-focus structure device according to claim 2, wherein It includes a limiting plate (6), and the limiting plate (6) is provided with a through hole (601). The through hole (601) is sleeved on the outer periphery of the adjusting knob (401). The limiting plate (6) is fixedly connected to the mirror base (1).

4. A dual-focus structure device according to claim 1, wherein The pitch circle diameter of the first gear (301) is larger than that of the second gear (302).

5. A dual-focus structure device according to claim 1, wherein The pressure angle of the first gear (301) and the second gear (302) is 20° and the module is 0.

5.

6. A dual-focus structure device according to claim 3, wherein The mirror base (1) has a limiting groove (101) on its side wall, and the end of the adjustment knob (401) is installed in the limiting groove (101).

7. A dual-focus structure device according to claim 6, wherein The second manual adjustment component (5) is rotatably connected to the limiting plate (6).

8. A dual-focus structure device according to claim 7, wherein The first manual adjustment component (4) further includes a first sealing ring (403) and a second sealing ring (404). The first sealing ring (403) is located between the end of the adjustment knob (401) and the limiting groove (101), and the second sealing ring (404) is located between the adjustment knob (401) and the limiting plate (6).

9. A dual-focus structure device according to claim 6, wherein The limiting groove (101) is provided with an arc-shaped groove (102), and the first connecting rod (402) passes through the arc-shaped groove (102) to movably connect to the mirror base (1).

10. A laser head, characterized by Includes a dual-focusing structure device as described in any one of claims 1-9.

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