Light curtain protection mechanism of high-speed laser cutting machine

Abstract

The utility model discloses a light curtain protection mechanism of a high-speed laser cutting machine, and belongs to the technical field of light curtain protection devices. The light curtain protection mechanism of the high-speed laser cutting machine comprises a mounting bottom plate, an adjusting base is arranged on the mounting bottom plate, a first lead screw is arranged in the adjusting base, an emitter box body and a receiver box body are meshed on the first lead screw, and second lead screws are arranged in the emitter box body and the receiver box body. According to the light curtain protection mechanism of the high-speed laser cutting machine, through double adjustment of the first lead screw and the second lead screw, accurate control over the width, the height and the light beam density of a light curtain is achieved, different cutting requirements are met, the synchronous transmission design of the gear connecting rod telescopic frame ensures that the distance between the transmitter body and the receiver body is evenly adjusted, and the cutting efficiency is improved. The positioning precision and stability of the light curtain system are improved, deformation or missing detection of the light curtain is avoided, the multi-beam array design can cover a larger dangerous area, and protection blind areas are reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of light curtain protection devices, and more specifically, to a light curtain protection mechanism for a high-speed laser cutting machine. Background Technology

[0002] With the increasing demands for cutting precision and speed in industrial manufacturing, high-speed laser cutting machines are being used more and more widely. However, during operation, due to the powerful energy of the laser beam, accidental exposure to the human body can cause serious injury.

[0003] Chinese patent CN220249635U discloses a safety light curtain protection device that uses an electric telescopic rod to move the transmitter and receiver bodies up and down. However, in this patent, the height of the transmitter and receiver bodies is adjusted, but the size of the protection range is not adjusted, thus limiting its applicability. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and to provide a light curtain protection mechanism for high-speed laser cutting machines to solve the above-mentioned shortcomings.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] The light curtain protection mechanism of a high-speed laser cutting machine includes a mounting base plate. An adjusting base is provided on the mounting base plate. A first lead screw is provided inside the adjusting base plate. A transmitter housing and a receiver housing are engaged on the first lead screw. A second lead screw is provided inside both the transmitter housing and the receiver housing. A gear connecting rod telescopic frame is engaged on the second lead screw. The transmitter body is installed on the gear connecting rod telescopic frame placed inside the transmitter housing, and the receiver body is installed on the gear connecting rod telescopic frame placed inside the receiver housing.

[0007] Preferably, a first motor is provided at one end of the first lead screw, and the threads at both ends of the first lead screw are in opposite directions. When the first motor is working, it drives the first lead screw to rotate, controlling the transmitter box and the receiver box to move towards or away from each other at the same time, thereby controlling the distance between the transmitter box and the receiver box.

[0008] Preferably, the lower ends of both the transmitter housing and the receiver housing are provided with threaded sleeves that engage with the first lead screw. The threaded sleeves are slidably connected to the adjusting base. The adjusting base has a groove that is movably connected to the threaded sleeve, which is used to limit the transmitter housing and the receiver housing, prevent the transmitter housing and the receiver housing from tilting, and control the transmitter housing and the receiver housing to move in a straight line.

[0009] Preferably, both the transmitter housing and the receiver housing have limiting grooves, which are used to limit the position of the generator body or the receiver body, so that it can move in a straight line.

[0010] Preferably, the upper end of the second lead screw is connected to a second motor, and the second lead screw is controlled by the second motor.

[0011] Preferably, the gear linkage telescopic frame includes several hinged transmitter mounting structures or receiver mounting structures. The transmitter mounting structures and receiver mounting structures have the same overall structure, including a first link, a second link, a third link, a fourth link, and a plate. One end of the first link, the second link, the third link, and the fourth link is movably connected to the plate, and the transmitter body or the receiver body is mounted on the plate.

[0012] Preferably, gears are fixedly connected to the ends of the first, second, third, and fourth connecting rods that are connected to the plate, and the first, second, third, and fourth connecting rods mesh sequentially through gears, with the fourth connecting rod meshing with the first connecting rod through a gear.

[0013] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0014] This invention achieves precise control of the width, height, and beam density of the light curtain through dual adjustment of the first and second lead screws, adapting to different cutting needs. The synchronous transmission design of the gear-link telescopic frame ensures uniform adjustment of the spacing between all transmitter and receiver bodies, improving the positioning accuracy and stability of the light curtain system and preventing light curtain deformation or missed detection. The multi-beam array design can cover a larger dangerous area and reduce blind spots. The limiting groove and sliding groove structure ensures linear movement of the transmitter and receiver bodies, avoiding false triggering caused by offset. Attached Figure Description

[0015] Figure 1 This is an overall structural diagram of the light curtain protection mechanism for the high-speed laser cutting machine of this utility model;

[0016] Figure 2 This is a structural diagram of the internal structure of the transmitter housing of this utility model;

[0017] Figure 3 This is a partial structural diagram of the gear connecting rod telescopic frame of this utility model;

[0018] Figure 4 For the present utility model Figure 3 Exploded view.

[0019] In the diagram: 1. Mounting base plate; 2. Adjusting base; 21. First lead screw; 22. First motor; 3. Transmitter housing; 31. Threaded sleeve; 32. Limiting groove; 33. Second lead screw; 34. Second motor; 35. Gear connecting rod telescopic frame; 351. First connecting rod; 3511. Gear; 352. Second connecting rod; 353. Third connecting rod; 354. Fourth connecting rod; 355. Flat plate; 4. Receiver housing. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0022] Combination Figures 1-4 The light curtain protection mechanism of the high-speed laser cutting machine of this utility model includes a mounting base plate 1, which is used to fix the position of the entire light curtain protection mechanism. An adjustment base 2 is provided on the mounting base plate 1. A first lead screw 21 is provided inside the adjustment base 2. A transmitter housing 3 and a receiver housing 4 are engaged on the first lead screw 21. The two ends of the first lead screw 21 are movably connected to the two ends of the adjustment base 2 through bearings. A first motor 22 is provided at one end of the first lead screw 21. The threads at the two ends of the first lead screw 21 are in opposite directions. When the first motor 22 works, it drives the first lead screw 21 to rotate, controlling the transmitter housing 3 and the receiver housing 4 to move simultaneously towards or in opposite directions, thereby controlling the distance between the transmitter housing 3 and the receiver housing 4.

[0023] Specifically, the lower ends of both the transmitter housing 3 and the receiver housing 4 are provided with threaded sleeves 31 that mesh with the first lead screw 21. The threaded sleeves 31 are slidably connected to the adjusting base 2. The adjusting base 2 has a sliding groove that is movably connected to the threaded sleeves 31, which is used to limit the transmitter housing 3 and the receiver housing 4, prevent the transmitter housing 3 and the receiver housing 4 from tilting, and control the transmitter housing 3 and the receiver housing 4 to move in a straight line.

[0024] Please refer to Figure 2Both the transmitter housing 3 and the receiver housing 4 have limit grooves 32. The limit grooves 32 are used to limit the position of the generator body or the receiver body so that it moves in a straight line. At the same time, both the transmitter housing 3 and the receiver housing 4 are provided with a second lead screw 33. The two ends of the second lead screw 33 are movably connected to the two ends of the transmitter housing 3 or the receiver housing 4 through bearings. The upper end of the second lead screw 33 is connected to a second motor 34. The second lead screw 33 is controlled by the second motor 34. A gear connecting rod telescopic frame 35 is meshed on the second lead screw 33.

[0025] Taking the gear-link telescopic frame 35 inside the transmitter housing 3 as an example, one end of the gear-link telescopic frame 35 is connected to the end of the transmitter housing 3, and the other end of the gear-link telescopic frame 35 is engaged with the second lead screw 33. The gear-link telescopic frame 35 includes several transmitter mounting structures, and adjacent transmitter mounting structures are hinged together. When the second lead screw 33 drives one end of the gear-link telescopic frame 35 to move up or down, the spacing between the transmitter mounting structures can be adjusted.

[0026] More specifically, the transmitter mounting structure includes a first link 351, a second link 352, a third link 353, a fourth link 354, and a plate 355. One end of each of the first link 351, second link 352, third link 353, and fourth link 354 is movably connected to the plate 355. A gear 3511 is fixedly connected to the end of each of the first link 351, second link 352, third link 353, and fourth link 354 that is connected to the plate 355. 353 and the fourth link 354 are sequentially meshed by gear 3511. The fourth link 354 meshes with the first link 351 through gear 3511, thus forming a quadrilateral meshing ring. When one link rotates, the other links also rotate at the same angle through gear 3511, ensuring the accuracy of the position movement of the transmitter body. The adjacent sets of transmitter mounting structures are connected by hinges between the first link 351 and the fourth link 354, and between the second link 352 and the third link 353.

[0027] In this embodiment, a transmitter body is installed on one side of a flat plate 355 inside the transmitter housing 3, and a receiver body is installed on one side of a flat plate 355 inside the receiver housing 4. The transmitter body and the receiver body are respectively movably connected to the corresponding limiting grooves 32. The distance between the transmitter body and the receiver body is adjusted within the limiting grooves 32 to change the protection area.

[0028] Working process: First, the entire device is fixed in a suitable position on the laser cutting machine using the mounting base 1. Based on the required width of the protected area, the first motor 22 is started, driving the first lead screw 21 to rotate. Because the threads at both ends of the first lead screw 21 are in opposite directions, the transmitter housing 3 and the receiver housing 4 will move in opposite directions along a straight line under the cooperation of the threaded sleeve 31 and the sliding groove, thereby precisely adjusting the distance between them. Simultaneously, inside the transmitter housing 3 and the receiver housing 4, the second motor 34 drives the second lead screw 33 to rotate, which in turn drives the gear connecting rod telescopic frame 35 to extend and retract. When the second lead screw 33 drives the gear connecting rod telescopic frame 35 to move up and down, the other connecting rods rotate synchronously through the gear 3511, so that each plate 355 remains parallel and moves synchronously along a straight line, thereby driving the transmitter body or receiver body to adjust the spacing within the limiting groove 32. After the light curtain is formed, the transmitter body continuously emits infrared or laser beams, and the receiver body detects the beam status in real time. When personnel or foreign objects enter the light curtain area and block the beam, the receiver signal is interrupted, the control unit immediately triggers the safety relay, cuts off the laser power supply and stops the equipment, and the status indicator light alarms at the same time.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A light curtain protection mechanism for a high speed laser cutting machine comprising a mounting base plate (1) characterised in that: An adjustment base (2) is provided on the mounting base plate (1). A first lead screw (21) is provided inside the adjustment base (2). A transmitter housing (3) and a receiver housing (4) are engaged on the first lead screw (21). A second lead screw (33) is provided inside both the transmitter housing (3) and the receiver housing (4). A gear connecting rod telescopic frame (35) is engaged on the second lead screw (33). The transmitter body is installed on the gear connecting rod telescopic frame (35) placed inside the transmitter housing (3). The receiver body is installed on the gear connecting rod telescopic frame (35) placed inside the receiver housing (4).

2. The optical curtain protection mechanism for a high speed laser cutting machine as claimed in claim 1, wherein: The first lead screw (21) is equipped with a first motor (22) at one end, and the threads at both ends of the first lead screw (21) are opposite in direction.

3. The optical curtain protection mechanism for a high speed laser cutting machine as claimed in claim 1, wherein: The lower ends of both the transmitter housing (3) and the receiver housing (4) are provided with threaded sleeves (31) that mesh with the first lead screw (21).

4. The optical curtain protection mechanism for a high speed laser cutting machine as claimed in claim 1, wherein: Limiting slots (32) are provided on both the transmitter housing (3) and the receiver housing (4).

5. The optical curtain protection mechanism for a high speed laser cutting machine as claimed in claim 1, wherein: The upper end of the second lead screw (33) is connected to a second motor (34).

6. The optical curtain protection mechanism for a high speed laser cutting machine as claimed in claim 1, wherein: The gear linkage telescopic frame (35) includes several hinged transmitter mounting structures or receiver mounting structures. The transmitter mounting structure and receiver mounting structure have the same overall structure, including a first link (351), a second link (352), a third link (353), a fourth link (354), and a plate (355). One end of the first link (351), the second link (352), the third link (353), and the fourth link (354) are all movably connected to the plate (355). The transmitter body or the receiver body is mounted on the plate (355).

7. The optical curtain protection mechanism for a high speed laser cutting machine as claimed in claim 6, wherein: Gears (3511) are fixedly connected to the ends of the first link (351), the second link (352), the third link (353), and the fourth link (354) that are connected to the plate (355). The first link (351), the second link (352), the third link (353), and the fourth link (354) are sequentially meshed by the gears (3511), and the fourth link (354) is meshed with the first link (351) by the gears (3511).

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