A double-layer protective laser marking machine light path sealing protection device

Abstract

This invention provides a double-layer protective optical path sealing device for a laser marking machine, comprising a protective structure and optical path covers located at both ends of the protective structure. The protective structure includes a left connecting plate, a right connecting plate, an inner telescopic sealing sleeve, an outer telescopic sealing sleeve, and a screw adjustment assembly. The opposite sides of the left and right connecting plates are connected by the inner and outer telescopic sealing sleeves, with the inner telescopic sealing sleeve housed within the outer telescopic sealing sleeve. In this invention, the two optical path covers are connected by a telescopic protective structure composed of the left and right connecting plates, the inner and outer telescopic sealing sleeves, making the distance between the two optical path covers adjustable. This allows the distance between the left and right connecting plates to be adjusted according to the actual optical path length, thus making it suitable for various laser marking machines with different optical path lengths.

Description

Technical Field

[0001] This utility model relates to the field of laser optical path protection technology, specifically a double-layer protective optical path sealing protection device for laser marking machines. Background Technology

[0002] Laser marking machines use a laser beam to create permanent marks on the surfaces of various materials. The marking effect occurs by evaporating the surface material to expose the deeper layers, thus etching intricate patterns, trademarks, and text. Laser marking machines are mainly classified into CO2 laser marking machines, semiconductor laser marking machines, fiber laser marking machines, and YAG laser marking machines. The core component of a laser marking machine is the laser module, which primarily includes a laser generator, an optical path protection structure, and a galvanometer. The laser emitted by the laser generator passes through the optical path protection structure, is received by the galvanometer, and then reflected for marking. The optical path protection structure protects the long-distance transmitted beam from dust and debris, preventing it from obstructing the beam.

[0003] Currently, the optical path length of laser marking machines varies depending on the size of the object being marked. As the optical path length varies, the length of the corresponding optical path protection structure also varies. Therefore, for laser marking machines of different specifications, it is necessary to customize the optical path protection structure. However, such customized optical path protection structures have the drawback of limited applicability. In other words, they need to be individually molded and processed, requiring high precision and high production costs.

[0004] Therefore, this utility model provides a double-layer protective optical path sealing protection device for laser marking machines. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a double-layer protective optical path sealing protection device for laser marking machines, thereby solving the problems mentioned in the background art. This invention has the function of adjusting the optical path protection length, enabling the device to be used on various marking machines and reducing cost investment.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a double-layer protective optical path sealing protection device for a laser marking machine, comprising a protective structure and optical path covers located at both ends of the protective structure. The protective structure includes a left connecting plate, a right connecting plate, an inner telescopic sealing sleeve, an outer telescopic sealing sleeve, and a screw adjustment group. The opposite sides of the left and right connecting plates are connected by the inner and outer telescopic sealing sleeves. The inner telescopic sealing sleeve is housed within the outer telescopic sealing sleeve. One side of the left connecting plate is connected to one side of the right connecting plate through the screw adjustment group, which is located outside the outer telescopic sealing sleeve.

[0007] Furthermore, the inner telescopic sealing sleeve includes an inner long light tube and an inner short light tube. One end of the inner long light tube is fixedly connected to one side of the right connecting plate, and one end of the inner short light tube is fixedly connected to one side of the left connecting plate. The other end of the inner short light tube is sleeved inside the inner long light tube, and the two are sealed and slidingly engaged.

[0008] Furthermore, the inner short light tube is fitted with an inner sealing rubber sleeve.

[0009] Furthermore, the outer telescopic sealing sleeve includes an outer long light tube and an outer short light tube. One end of the outer long light tube is fixedly connected to one side of the left connecting plate, and one end of the outer short light tube is fixedly connected to one side of the right connecting plate. The other end of the outer short light tube is sleeved inside the outer long light tube, and the two slide and seal together.

[0010] Furthermore, the outer long optical tube is fitted with an outer sealing rubber sleeve.

[0011] Furthermore, the outer peripheral wall of the outer long optical tube is connected to the air inlet pipe, and the outer peripheral wall of the inner long optical tube is connected to the adapter pipe. One end of the adapter pipe is fixedly connected to one end of the air inlet pipe through a hose. One-way valves for air outlet are fixedly connected to the walls of both the outer and inner long optical tubes.

[0012] Furthermore, the lead screw adjustment assembly includes a screw and a screw sleeve. One end of the screw is fixedly connected to one side of the right connecting plate, and the screw sleeve is rotatably connected to one side of the left connecting plate, with its other end sleeved outside the screw.

[0013] Furthermore, a short connecting pipe sleeved on one end of the screw is fixedly connected to one side of the left connecting plate. An annular groove is provided in the short connecting pipe, and a limiting ring located in the annular groove is fixedly sleeved on the outside of the threaded sleeve.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. In this utility model, the two optical path covers are connected by a telescopic protective structure consisting of a left connecting plate, a right connecting plate, an inner telescopic sealing sleeve, and an outer telescopic sealing sleeve, so that the distance between the two optical path covers is adjustable. Thus, the distance between the left connecting plate and the right connecting plate can be adjusted according to the actual optical path length, making it suitable for use with various laser marking machines with different optical path lengths.

[0016] 2. In this utility model, the inner telescopic sealing sleeve is fitted inside the outer telescopic sealing sleeve, so that the optical path is in a state of double-layer sealing protection, which has a better sealing protection effect on the beam transmitted in the optical path.

[0017] 3. In this utility model, by setting an air inlet pipe, a hose and a one-way valve, inert gas can be conveniently introduced into the inner telescopic sealing sleeve through the air inlet. Then, under the guidance of the one-way valve, the inert gas can fill the inner telescopic sealing sleeve and the outer telescopic sealing sleeve, which makes it easy to discharge dust and debris that accidentally enter the inner telescopic sealing sleeve and the outer telescopic sealing sleeve, and has the advantage of making dust removal and maintenance more convenient. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a double-layer protective optical path sealing protection device for a laser marking machine according to this utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of a partial cross-section;

[0020] Figure 3 This is a schematic diagram of the optical path sealing protection device for a double-layer protected laser marking machine after an explosion.

[0021] In the diagram: 1. Protective structure; 11. Left connecting plate; 112. Short connecting pipe; 1121. Annular groove; 12. Right connecting plate; 13. Inner telescopic sealing sleeve; 131. Inner long optical tube; 1311. Adaptor connecting pipe; 132. Inner short optical tube; 14. Outer telescopic sealing sleeve; 141. Outer long optical tube; 1411. Inlet pipe; 142. Outer short optical tube; 15. Screw adjusting assembly; 151. Screw; 1511. Limiting ring; 152. Screw sleeve; 2. Optical path cover; 3. Inner sealing sleeve; 4. Outer sealing sleeve; 5. Hose; 6. One-way valve for exhaust. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] Please see Figures 1 to 3 This utility model provides a technical solution: a double-layer protective optical path sealing protection device for a laser marking machine, including a protective structure 1 and optical path covers 2 located at both ends of the protective structure 1. A laser generator assembly is installed inside one optical path cover 2, and a galvanometer assembly is installed inside the other optical path cover 2. An installation structure adapted to the laser generator assembly and the galvanometer assembly is provided inside the optical path cover 2. Such installation structures are existing technologies and will not be described in detail here. The laser beam emitted by the laser generator assembly is transmitted to the galvanometer assembly through an optical fiber assembly or a beam guide assembly (whose length can be cut as needed and is simple to manufacture). The function of the protective structure 1 is to seal and protect the optical path between the laser generator assembly and the galvanometer assembly. The coupling method between the optical fiber assembly or beam guide assembly and the laser generator assembly and the galvanometer assembly is existing technology and will not be described in detail here.

[0024] In this technical solution, the protective structure 1 includes a left connecting plate 11, a right connecting plate 12, an inner telescopic sealing sleeve 13, an outer telescopic sealing sleeve 14, and a screw adjustment assembly 15. Two optical path covers 2 are fixedly connected to the opposite sides of the left connecting plate 11 and the right connecting plate 12, respectively. A positioning tube is fixedly connected to one side of each optical path cover 2. Positioning holes for fixed connection to the positioning tube are provided on both the left and right connecting plates 11 and 12. The opposite sides of the left connecting plate 11 and the right connecting plate 12 are connected by the inner telescopic sealing sleeve 13 and the outer telescopic sealing sleeve 14. The inner telescopic sealing sleeve 13 is housed within the outer telescopic sealing sleeve 15. The inner cavity of the inner telescopic sealing sleeve 13 is the first sealed cavity through which the optical path system passes. The annular cavity between the outer telescopic sealing sleeve 14 and the inner telescopic sealing sleeve 13 is the second sealed cavity. The protective cavities on both sides greatly improve the protective effect on the optical path system.

[0025] The telescopic structure of the inner telescopic sealing sleeve 13 and the outer telescopic sealing sleeve 15 allows the distance between the left connecting plate 11 and the right connecting plate 12 to be adjustable, thereby adjusting the distance between the two light path covers 2. This gives the device a universal function for various marking machines. In use, a mounting base can be installed on the side wall of the light path cover 2 or a locking hole can be opened to facilitate the fixed connection between the light path cover 2 and the movable seat on the marking machine.

[0026] Specifically, the inner telescopic sealing sleeve 13 includes an inner long light tube 131 and an inner short light tube 132. One end of the inner long light tube 131 is fixedly connected to one side of the right connecting plate 12, and one end of the inner short light tube 132 is fixedly connected to one side of the left connecting plate 11. The other end of the inner short light tube 132 is sleeved inside the inner long light tube 131 and the two are sealed and slidingly engaged. Specifically, an inner sealing rubber sleeve 3 is fixedly sleeved inside the inner short light tube 132 and is sleeved outside the inner long light tube 131. The inner sealing rubber sleeve 3 is used to eliminate the gap between the inner short light tube 132 and the inner long light tube 131.

[0027] Furthermore, the outer telescopic sealing sleeve 14 includes an outer long light tube 141 and an outer short light tube 142. One end of the outer long light tube 141 is fixedly connected to one side of the left connecting plate 11, and one end of the outer short light tube 142 is fixedly connected to one side of the right connecting plate 12. The other end of the outer short light tube 142 is sleeved inside the outer long light tube 141 and the two slide and seal together. Specifically, an outer sealing sleeve 4 is fixedly sleeved inside the outer long light tube 141 and is sleeved outside the outer short light tube 142, which serves to eliminate the gap between the outer long light tube 141 and the outer short light tube 142.

[0028] Furthermore, one side of the left connecting plate 11 is connected to one side of the right connecting plate 12 via a screw adjustment assembly 14. The screw adjustment assembly 14 is located outside the outer telescopic sealing sleeve 15. The function of the screw adjustment assembly 14 is to adjust the distance between the left connecting plate 11 and the right connecting plate 12. When the distance is adjusted, the outer telescopic sealing sleeve 14 and the inner telescopic sealing sleeve 13 will adaptively extend and retract.

[0029] Specifically, the lead screw adjustment assembly 15 includes a screw 151 and a threaded sleeve 152. One end of the screw 151 is fixedly connected to one side of the right connecting plate 12, and the threaded sleeve 152 is rotatably connected to one side of the left connecting plate 11, with its other end sleeved outside the screw 151. Thus, when the threaded sleeve 152 rotates, the screw 151 will move axially relative to the threaded sleeve 152 under the action of the thread. During manufacturing, an external hexagonal platform can be fixedly sleeved outside the threaded sleeve 152.

[0030] Furthermore, a short connecting pipe 112 is fixedly connected to one side of the left connecting plate 11 and sleeved on one end of the screw 151. An annular groove 1121 is formed inside the short connecting pipe 112. A limiting ring 1511 located within the annular groove 1121 is fixedly sleeved on the outside of the threaded sleeve 152. When the threaded sleeve 152 rotates, the annular groove 1121 axially limits the limiting ring 1511. In use, a locking bolt can be screwed through the outer peripheral wall of the short connecting pipe 112. When the locking bolt is tightened, one end of it will press against the outer wall of the threaded sleeve 152, thereby locking the threaded sleeve 152 and the short connecting pipe 112.

[0031] In this embodiment, the left connecting plate 11 and the right connecting plate 12 are connected by two telescopic guide posts on opposite sides. The two telescopic guide posts are located on both sides of the outer telescopic sealing sleeve 14, which aims to improve the stability of the relative movement of the left connecting plate 11 and the right connecting plate 12.

[0032] In this embodiment, the outer peripheral wall of the outer long optical tube 141 is connected to the air inlet pipe 1411, and the outer peripheral wall of the inner long optical tube 131 is connected to the adapter pipe 1311. One end of the adapter pipe 1311 is fixedly connected to one end of the air inlet pipe 1411 through the hose 5, and the other end of the air inlet pipe 1411 is connected to the solenoid valve through the air pipe. The solenoid valve is connected to an external inert gas supply system (such as a pressure cylinder, which stores inert gas) through the air pipe. When the solenoid valve is opened, the inert gas will enter the inner long optical tube 131 through the hose 5. The outer long optical tube 141 and the inner long optical tube 131 are both fixedly connected to the cylinder walls. The inert gas and dust in the inner long optical tube 131 will enter the space between the inner telescopic sealing sleeve 13 and the outer telescopic sealing sleeve 14 through the exhaust one-way valve 6, and then be discharged through the exhaust one-way valve 6 on the outer long optical tube 141, which has the function of inert gas dust removal and protection.

[0033] Working principle: When it is necessary to adjust the distance between the two optical path covers 2 to meet the optical path length requirements of the current laser marking machine, the external hexagonal platform of the wire sleeve 152 is used to rotate the wire sleeve 152, the screw 151 moves axially, the inner long optical tube 131 moves axially relative to the inner short optical tube 132, and the outer long optical tube 141 moves axially relative to the outer short optical tube 142. After the adjustment is completed, the locking bolt is tightened. At this time, the wire sleeve 152 is fixed, and the distance between the two optical path covers 2 is adjusted.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A double-protected optical path sealing protection device for a laser marking machine, comprising a protection structure (1) and an optical path cover (2) located at both ends of the protection structure (1), characterized in that, The protective structure (1) includes a left connecting plate (11), a right connecting plate (12), an inner telescopic sealing sleeve (13), an outer telescopic sealing sleeve (14), and a screw adjusting assembly (15). The opposite sides of the left connecting plate (11) and the right connecting plate (12) are connected by the inner telescopic sealing sleeve (13) and the outer telescopic sealing sleeve (14). The inner telescopic sealing sleeve (13) is housed inside the outer telescopic sealing sleeve (14). One side of the left connecting plate (11) is connected to one side of the right connecting plate (12) through the screw adjusting assembly (15). The screw adjusting assembly (15) is located outside the outer telescopic sealing sleeve (14).

2. The double-protected optical path sealing protection device of the laser marking machine according to claim 1, characterized in that: The inner telescopic sealing sleeve (13) includes an inner long light tube (131) and an inner short light tube (132). One end of the inner long light tube (131) is fixedly connected to one side of the right connecting plate (12), and one end of the inner short light tube (132) is fixedly connected to one side of the left connecting plate (11). The other end of the inner short light tube (132) is sleeved inside the inner long light tube (131) and the two are sealed and slidingly engaged.

3. The dual-protected laser marking machine optical path sealing protection device according to claim 2, characterized in that: The inner short light tube (132) is fitted with an inner sealing rubber sleeve (3).

4. The dual-protected optical path sealing protection device of the laser marking machine according to claim 2, characterized in that: The outer telescopic sealing sleeve (14) includes an outer long light tube (141) and an outer short light tube (142). One end of the outer long light tube (141) is fixedly connected to one side of the left connecting plate (11), and one end of the outer short light tube (142) is fixedly connected to one side of the right connecting plate (12). The other end of the outer short light tube (142) is sleeved inside the outer long light tube (141) and the two slide and seal together.

5. The dual-protected optical path sealing protection device of the laser marking machine according to claim 4, characterized in that: The outer long tube (141) is fixedly fitted with an outer sealing rubber sleeve (4).

6. The dual-protected optical path sealing protection device of the laser marking machine according to claim 4, characterized in that: The outer peripheral wall of the outer long light tube (141) is connected to the air inlet pipe (1411), and the outer peripheral wall of the inner long light tube (131) is connected to the adapter pipe (1311). One end of the adapter pipe (1311) is fixedly connected to one end of the air inlet pipe (1411) through the hose (5). Both the outer long light tube (141) and the inner long light tube (131) are fixedly connected to the cylinder walls with one-way valves (6).

7. The dual protective sealed optical path protection device for laser marking machine according to claim 1, characterized in that: The lead screw adjustment assembly (15) includes a screw (151) and a threaded sleeve (152). One end of the screw (151) is fixedly connected to one side of the right connecting plate (12), and the threaded sleeve (152) is rotatably connected to one side of the left connecting plate (11), with its other end sleeved outside the screw (151).

8. The dual-protected laser marking machine optical path sealing protection device according to claim 7, characterized in that: A short tube (112) is fixedly connected to one side of the left connecting plate (11) and sleeved on one end of the screw (151). An annular groove (1121) is provided in the short tube (112), and a limiting ring (1511) located in the annular groove (1121) is fixedly sleeved on the outside of the thread sleeve (152).

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