Mirror group structure and laser processing head

Abstract

The application discloses a lens set structure and a laser processing head. The lens set structure comprises a lens barrel, a lens, a lens gasket and a locking plate. The lens is arranged in the lens barrel. The locking plate is detachably connected to the lens barrel. The lens gasket is detachably arranged in the lens barrel and connected to the locking plate. The lens gasket comprises an abutting part used for abutting the lens. The end surface of the abutting part towards the lens is an arc surface. The arc surface of the abutting part forms linear contact with the lens, which can reduce the abrasion or scratches generated on the edge of the lens.

Description

Technical Field

[0001] This application relates to the field of laser processing, and in particular to a mirror assembly structure and a laser processing head. Background Technology

[0002] In laser processing equipment, the lens assembly of the laser processing head is the core component for beam shaping and focusing, directly affecting processing accuracy and efficiency. In related technologies, under installation or vibration conditions, the lens assembly of the laser processing head is easily scratched by the lens gaskets. Utility Model Content

[0003] This application provides a lens assembly structure and a laser processing head that can reduce wear or scratches on the lens edges.

[0004] The lens assembly structure provided in this application includes:

[0005] Lens tube;

[0006] The lens is disposed inside the lens tube;

[0007] A locking plate, detachably connected to the lens barrel; and

[0008] A lens gasket is detachably disposed inside the lens barrel and connected to the locking plate. The lens gasket includes a retaining portion for abutting the lens, and the end face of the retaining portion facing the lens is an arc-shaped surface.

[0009] Optionally, the lens gasket further includes a mounting portion connected to the abutment portion, the abutment portion extending outward from the mounting portion to form a mounting platform, and the locking plate sleeved on the mounting portion and located on the mounting platform.

[0010] Optionally, the mirror assembly structure further includes a wave-shaped washer, which abuts against the mounting platform and the locking plate.

[0011] Optionally, the lens includes at least one of a curved lens and a plane lens.

[0012] Optionally, a limiting platform is formed at one end of the lens barrel opposite to the locking plate, the limiting platform extending radially inward along the lens barrel, and the lens is located between the supporting portion and the limiting platform.

[0013] Optionally, the lens assembly structure further includes a first connector, a first mounting hole is formed on the locking plate, a second mounting hole is formed on the lens barrel, and the first connector passes through the first mounting hole and the second mounting hole.

[0014] Optionally, the lens assembly structure further includes a second connector, and the lens barrel is provided with a third mounting hole, the second connector passing through the third mounting hole to connect the lens barrel to the connected component.

[0015] Optionally, the locking plate has a clearance hole, which is axially aligned with the third mounting hole.

[0016] Optionally, the upper surface of the lens barrel is evenly distributed with a plurality of third mounting holes along the circumference, and the upper surface of the locking plate is evenly distributed with a plurality of clearance holes along the circumference, wherein the clearance holes and the third mounting holes correspond one-to-one.

[0017] This application also provides a laser processing head, comprising:

[0018] The mirror assembly structure described in any of the above embodiments; and

[0019] The processing head body is connected to the lens barrel of the lens assembly structure.

[0020] In the lens assembly structure and laser processing head of this application, the arc-shaped surface of the holding part forms a line contact with the lens, which can reduce the contact area and thereby reduce the relative friction area between the lens gasket and the lens. Under installation or vibration conditions, the wear or scratches on the lens edge by the lens gasket can be reduced. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the lens assembly structure provided in an embodiment of this application.

[0023] Figure 2 This is an exploded view of the mirror assembly structure provided in an embodiment of this application.

[0024] Figure 3 This is a cross-sectional view of the mirror assembly structure provided in an embodiment of this application.

[0025] Figure 4 The mirror assembly structure provided in the embodiments of this application Figure 3 An enlarged schematic diagram of point A.

[0026] Explanation of icon numbers:

[0027] Lens assembly structure 10, lens barrel 11, limiting stage 111, second mounting hole 112, third mounting hole 113, lens 12, lens gasket 13, supporting part 131, end face 1311, mounting stage 1312, mounting part 132, locking plate 14, first mounting hole 141, clearance hole 142, wave washer 15, first connector 16, second connector 17.

[0028] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

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

[0031] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0032] It should be understood that the term "and / or" as used in this application specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0034] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the lens assembly structure 10 provided in an embodiment of this application. Figure 2 This is an exploded view of the lens assembly structure 10 provided in an embodiment of this application. The lens assembly structure 10 provided in this application includes a lens barrel 11, a lens 12, a lens washer 13, and a locking plate 14. The lens 12 is disposed inside the lens barrel 11. The locking plate 14 is detachably connected to the lens barrel 11. The lens washer 13 is detachably disposed inside the lens barrel 11 and connected to the locking plate 14. The lens washer 13 includes a supporting portion 131, which is used to abut against the lens 12. The end face 1311 of the supporting portion 131 facing the lens 12 is an arc-shaped surface.

[0035] The mirror assembly structure 10 can be used in a laser processing head, which includes a processing head body, and the mirror assembly structure 10 is connected to the processing head body. The processing head body can be a cutting head, a welding head, etc., and is not limited thereto. The mirror assembly structure 10 can be a collimating mirror assembly structure, a beam expander mirror assembly structure, or a focusing mirror assembly structure, etc., and is not limited thereto.

[0036] The lens barrel 11 serves as the basic load-bearing structure of the entire lens assembly, providing mounting reference and positioning space for other components, while also protecting the lens 12. The lens barrel 11 is a hollow structure, with its interior used to install components such as the lens 12 and lens gasket 13. The lens 12 is used to focus, reflect, or refract light from the entire lens assembly 10. The lens 12 is fixed in place by the lens gasket 13 and locking plate 14, ensuring its stability during operation and preventing it from falling out. The lens 12 is detachably housed within the lens barrel 11 for easy replacement and maintenance.

[0037] The lens gasket 13 is at least partially housed in the lens barrel 11, and the supporting portion 131 of the lens gasket 13 directly abuts against the lens 12, serving to buffer and reduce shock to protect the edge of the lens 12.

[0038] The locking plate 14 is installed on the side of the lens washer 13 facing away from the lens 12. The locking plate 14 is fixed to the lens barrel 11 by a detachable connection, thereby achieving axial locking of the lens 12 and the lens washer 13. Exemplarily, an external thread is formed on the outer wall of the locking plate 14, and an internal thread is formed on the inner wall of the lens barrel 11 to mate with the external thread. The detachable connection between the locking plate 14 and the lens barrel 11 is achieved through the engagement of the internal and external threads.

[0039] The components of the lens assembly structure 10 are designed with detachable connections. When the lens 12 is damaged, the locking plate 14 and lens gasket 13 can be removed from the lens barrel 11, the lens 12 on the lens barrel 11 can be removed and replaced with a new lens 12, and then reinstalled, thereby reducing maintenance costs. Lenses 12 with different parameters can also be replaced according to different processing requirements, such as lenses 12 with different focal lengths, improving the versatility of the lens assembly structure 10.

[0040] Please see Figure 3 and Figure 4 , Figure 3 This is a cross-sectional view of the mirror assembly structure 10 provided in an embodiment of this application. Figure 4 The lens assembly structure 10 provided in the embodiments of this application Figure 3 An enlarged schematic diagram of point A. The supporting part 131 protrudes from the lens gasket 13 toward the position of the lens 12 to form an arc-shaped surface. The arc-shaped contour of the supporting part 131 forms line contact with the lens 12, which can reduce wear or scratches on the edge of the lens 12.

[0041] Compared to traditional right-angle or planar contact structures, the arc-shaped contour of the supporting part 131 forms a line contact with the edge of the lens 12, which reduces the contact area and thus reduces the relative friction area between the lens gasket 13 and the lens 12. Under installation or vibration conditions, this can reduce wear or scratches on the edge of the lens 12 caused by the lens gasket 13.

[0042] In addition, the arc shape has a certain degree of angular self-adaptation capability. When the lens 12 is installed with a slight tilt, or when the lens 12 itself has a slight dimensional tolerance, the contact point between the lens 12 and the end face 1311 can undergo a slight displacement to achieve adaptation and improve the fault tolerance of the lens assembly structure 10. The arc radius of the end face 1311 can be set according to the material, thickness and working pressure of the lens 12, and is not limited here.

[0043] Optionally, the lens 12 includes at least one of a curved lens and a flat lens. The arc-shaped design of the supporting part 131 can be adapted to both curved and flat lenses. The arc-shaped supporting part 131 adapts to the curved surface of the curved lens, which can avoid local pressure concentration generated by the flat supporting part 131. It can also adapt to the small deformation of the curved lens during processing or vibration through the arc-shaped design, and prevent the edge of the lens 12 from cracking due to excessive stress.

[0044] For a plane lens, the arc-shaped contour of the supporting part 131 makes line contact with the plane lens, which can reduce wear or scratches on the edge of the plane lens. At the same time, the arc-shaped structure of the supporting part 131 can also compensate for the assembly tolerance between the plane lens and the lens barrel 11.

[0045] Optionally, there can be two lenses 12, one of which is a meniscus lens and the other is a biconvex lens. The biconvex lens abuts against the supporting portion 131, and the meniscus lens and the biconvex lens are coaxially arranged. The combination of the meniscus lens and the biconvex lens can form a compound optical system, enabling the laser beam to obtain a more uniform energy distribution and a smaller spot diameter during focusing. Both sides of the biconvex lens are convex, one of which can form a line contact fit with the arc-shaped supporting portion 131 of the lens gasket 13, and the concave surface of the meniscus lens faces the biconvex lens.

[0046] The number of lenses 12 can be one, two, or three, etc., and there is no restriction here.

[0047] Please see Figure 3 Optionally, a limiting stage 111 is formed at one end of the lens barrel 11 away from the locking plate 14. The limiting stage 111 extends radially inward along the lens barrel 11, and the lens 12 is located between the supporting part 131 and the limiting stage 111.

[0048] The limiting platform 111, as an integrated structure of the lens barrel 11, provides a reliable axial support reference for the lens 12 and forms a bidirectional clamping effect with the abutment portion 131 of the lens washer 13. When the locking plate 14 applies pre-tightening force through the lens washer 13, one side of the lens 12 is firmly supported by the limiting platform 111, while the other side is uniformly pressed by the abutment portion 131, preventing the lens 12 from moving axially due to vibration during operation.

[0049] Please see Figure 4 Optionally, the lens gasket 13 further includes a mounting portion 132 connected to the abutment portion 131. The abutment portion 131 extends outward from the mounting portion 132 to form a mounting platform 1312. The locking plate 14 is sleeved on the mounting portion 132 and located on the mounting platform 1312. The mounting platform 1312 and the mounting portion 132 together form a stepped structure, on which the locking plate 14 is sleeved. The stepped structure provides a mounting reference for the locking plate 14.

[0050] When the locking plate 14 is fitted onto the mounting portion 132, the mounting platform 1312 can limit the installation depth of the locking plate 14, preventing the locking plate 14 from pressing excessively against the lens washer 13 or the lens 12, which could cause the lens 12 to break. The radial profile of the mounting portion 132 can ensure the coaxiality between the locking plate 14 and the lens washer 13, preventing uneven force caused by the eccentricity of the locking plate 14.

[0051] Please see Figure 2 Optionally, the lens assembly structure 10 also includes a wave-shaped washer 15, which abuts against the mounting platform 1312 and the locking plate 14. In this way, the wave-shaped washer 15 can provide elasticity to press the lens 12 tightly through the lens washer 13, so as to better fix the lens 12.

[0052] The wave-shaped washer 15 is elastic. When the locking plate 14 is connected to the lens barrel 11, the wave-shaped washer 15 is subjected to axial compression by the locking plate 14 and the mounting platform 1312, resulting in elastic deformation, which is converted into continuous clamping force. This force is transmitted to the lens 12 through the supporting part 131 of the lens washer 13, ensuring that the lens 12 is always stably clamped between the supporting part 131 and the limiting platform 111, effectively avoiding the loosening problem of the lens 12.

[0053] In addition, when the laser processing head vibrates or changes temperature during operation, the elasticity of the wave washer 15 can buffer the impact energy, reduce the transmission of vibration to the lens washer 13 and lens 12, and reduce the risk of damage to lens 12.

[0054] Optionally, the lens assembly structure 10 further includes a first connector 16, a first mounting hole 141 is formed on the locking plate 14, a second mounting hole 112 is formed on the lens barrel 11, and the first connector 16 passes through the first mounting hole 141 and the second mounting hole 112.

[0055] The first connector 16 is detachably connected to the first mounting hole 141 and the second mounting hole 112, resulting in a simple structure and making the lens assembly 10 easy to assemble and disassemble. When it is necessary to replace the lens 12 or other components, the locking plate 14 and lens gasket 13 can be separated simply by removing the first connector 16. The operation is simple and will not cause damage to the lens barrel 11, further reducing maintenance costs and difficulty.

[0056] The locking plate 14 has a plurality of first mounting holes 141 evenly spaced along its circumference, and the end of the lens barrel 11 facing the locking plate 14 also has a plurality of second mounting holes 112 spaced along its circumference. The first mounting holes 141 and the second mounting holes 112 correspond one-to-one. The first mounting holes 141 and the second mounting holes 112 are coaxially arranged along the axis of the lens barrel 11, which can ensure that the locking force of the plurality of first connecting parts 16 is uniform and symmetrical, and prevent the locking plate 14 from being tilted by force.

[0057] The first connector 16 passes through the first mounting hole 141 and the second mounting hole 112 to achieve a detachable connection between the locking plate 14 and the lens barrel 11. The first connector 16 is usually a threaded fastener such as a screw or bolt. The threaded connection between the first connector 16 and the first mounting hole 141 and the second mounting hole 112 can stably transmit the locking force of the locking plate 14 to the lens barrel 11.

[0058] By controlling the tightening degree of the first connector 16, the compression amount of the wave washer 15 can be adjusted, thereby controlling the preload force acting on the lens washer 13 and the lens 12. This ensures that the lens 12 is reliably clamped between the holding part 131 and the limiting platform 111, while also preventing excessive preload force from damaging the lens 12.

[0059] Optionally, the lens assembly structure 10 also includes a second connector 17. A third mounting hole 113 is provided on the lens barrel 11, and the second connector 17 passes through the third mounting hole 113 to connect the lens barrel 11 to the connected component. The detachable connection method using the second connector 17 and the third mounting hole 113 provides a flexible and stable external assembly method for the entire lens assembly structure 10, which is simple in structure and easy to assemble and disassemble.

[0060] The connected component can be the housing, bracket, processing head body or other parts of the laser processing head, and the second connecting component 17 is usually a screw, bolt or the like.

[0061] Optionally, the locking plate 14 has a clearance hole 142, which is axially aligned with the third mounting hole 113. This avoids interference between the locking plate 14 and the second connector 17. When the second connector 17 passes through the third mounting hole 113 to connect the lens barrel 11 and the connected part, the clearance hole 142 allows the second connector 17 to pass through so that it can connect the lens barrel 11 and the connected part. At the same time, it also provides operating space for the tool, ensuring that the second connector 17 can still be easily disassembled or tightened even when the locking plate 14 is installed in place.

[0062] Optionally, the upper surface of the lens barrel 11 has a plurality of third mounting holes 113 evenly distributed along the circumference, and the upper surface of the locking plate 14 has a plurality of clearance holes 142 evenly distributed along the circumference, with the clearance holes 142 and the third mounting holes 113 corresponding one-to-one.

[0063] The lens barrel 11 has multiple third mounting holes 113 spaced circumferentially along the side facing the locking plate 14. These third mounting holes 113 are spaced apart from the second mounting holes 112, and each second connector 17 corresponds to one of the third mounting holes 113. The multiple second connectors 17 pass through the third mounting holes 113, making the connection between the lens barrel 11 and the connected parts more secure. Furthermore, each second connector 17 has a corresponding clearance hole 142 providing operating space for easy installation.

[0064] During assembly, the locking plate 14 and lens gasket 13 and other components can be fixed to the lens barrel 11 by the first connector 16, and then the second connector 17 can be installed by using the space corresponding to the clearance hole 142 to complete the connection between the lens barrel 11 and the connected component. There is no need to disassemble the internal components of the lens barrel 11, which improves the assembly efficiency.

[0065] This application also provides a laser processing head, including a mirror assembly structure 10 according to any of the above embodiments and a processing head body. The processing head body is connected to the mirror barrel 11 of the mirror assembly structure 10. Since the laser processing head of this application adopts the above-described mirror assembly structure 10, it has at least the beneficial effects of the above-described mirror assembly structure 10, which will not be repeated here.

[0066] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A mirror assembly structure, characterized in that, include: Lens tube; The lens is disposed inside the lens tube; A locking plate, which is detachably connected to the lens barrel; as well as A lens gasket is detachably disposed inside the lens barrel and connected to the locking plate. The lens gasket includes a retaining portion for abutting the lens, and the end face of the retaining portion facing the lens is an arc-shaped surface.

2. The lens assembly structure according to claim 1, characterized in that, The lens gasket also includes a mounting portion connected to the abutment portion, the abutment portion extending outward from the mounting portion to form a mounting platform, and the locking plate sleeved on the mounting portion and located on the mounting platform.

3. The lens assembly structure according to claim 2, characterized in that, The mirror assembly structure also includes a wave-shaped washer, which abuts against the mounting platform and the locking plate.

4. The lens assembly structure according to claim 1, characterized in that, The lens includes at least one of a curved lens and a flat lens.

5. The lens assembly structure according to claim 4, characterized in that, The end of the lens barrel opposite to the locking plate forms a limiting platform, which extends radially inward along the lens barrel, and the lens is located between the supporting part and the limiting platform.

6. The lens assembly structure according to any one of claims 1-3, characterized in that, The lens assembly structure also includes a first connector, a first mounting hole is formed on the locking plate, a second mounting hole is formed on the lens barrel, and the first connector passes through the first mounting hole and the second mounting hole.

7. The lens assembly structure according to claim 6, characterized in that, The lens assembly structure also includes a second connector, and the lens barrel is provided with a third mounting hole. The second connector passes through the third mounting hole to connect the lens barrel to the connected component.

8. The lens assembly structure according to claim 7, characterized in that, The locking plate has a clearance hole, which is axially aligned with the third mounting hole.

9. The lens assembly structure according to claim 8, characterized in that, The upper surface of the lens barrel has a plurality of third mounting holes evenly distributed circumferentially, and the upper surface of the locking plate has a plurality of clearance holes evenly distributed circumferentially, with the clearance holes and the third mounting holes corresponding one-to-one.

10. A laser processing head, characterized in that, include: The mirror assembly structure according to any one of claims 1-9; as well as The processing head body is connected to the lens barrel of the lens assembly structure.

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