Laser cutting equipment for manufacturing machine tool accessories

Abstract

The invention belongs to the technical field of laser cutting, and particularly relates to laser cutting equipment for manufacturing machine tool accessories, which comprises a cutting table, a first moving frame is arranged at the top end of the cutting table, a moving table is arranged on one side of the first moving frame, and a connecting shell is fixed on the side, away from the first moving frame, of the moving table. A laser generator is arranged on the side, away from the moving table, of the connecting shell. A first connecting plate is further included, a plurality of prime lenses are arranged on the outer side of the first connecting plate at equal intervals, a pair of limiting plates is fixed to the side, close to the laser generator, of the connecting shell, and a second lifting plate is slidably connected between the limiting plates; a plurality of prime lenses are arranged outside a first connecting plate, and a servo motor rotates to drive the prime lenses to rotate through the first connecting plate so as to switch the prime lenses with different focal lengths to the position below a laser generator, so that the focal length of the laser generator is changed to cope with metal plates made of different materials; the problem of abrasion caused by the position of a traditional internal lens can be prevented through an external switching mode.

Description

[0001] This application is a divisional application of application filed on October 16, 2025, with application number 2025114814272 and invention title "A laser cutting device for manufacturing machine tool accessories". Technical Field

[0002] This invention belongs to the field of laser cutting technology, specifically a laser cutting device for manufacturing machine tool accessories. Background Technology

[0003] Machine tool accessories are components used in the operation of machine tools. When processing machine tool accessories, it is necessary to cut metal sheets. Laser cutting is a non-contact processing method with a spot diameter that can reach the micrometer level. Using a laser cutting device, metal sheets are cut into the required size with higher precision and smaller error.

[0004] A Chinese patent with publication number CN110000468B discloses a manually focused fiber laser cutting head, which includes a fiber optic interface base, a water cooling assembly, a collimating lens assembly, a focusing lens assembly, a protective lens assembly, and a cutting nozzle arranged in sequence, and can realize the basic function of cutting carbon steel plates and stainless steel plates.

[0005] The above-mentioned technical solution requires manual adjustment of the cutting head's focal length during use. However, the internal structure of the cutting head is relatively complex, and after long-term use, the internal parts will wear out, resulting in lower accuracy of focal length adjustment and affecting the cutting effect. Furthermore, replacing the internal parts requires disassembling the cutting head, which is a rather cumbersome operation.

[0006] Therefore, the present invention provides a laser cutting device for manufacturing machine tool accessories. Summary of the Invention

[0007] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0008] The technical solution adopted by the present invention to solve its technical problem is: a laser cutting equipment for manufacturing machine tool accessories according to the present invention includes a cutting table, a first movable frame is provided at the top of the cutting table, a movable stage is provided on one side of the first movable frame, a connecting shell is fixed on the side of the movable stage away from the first movable frame, and a laser generator is provided on the side of the connecting shell away from the movable stage. It also includes a first connecting plate, on the outer side of which multiple fixed-focus lenses are equally spaced. One of the fixed-focus lenses is located at the bottom of the laser generator. A servo motor is installed at the top of the connecting shell. A pair of limiting plates are fixed on the side of the connecting shell near the laser generator. A second lifting plate is slidably connected between the limiting plates. The second lifting plate is fixedly connected to the laser generator. The servo motor rotates to drive the first connecting plate, which causes multiple fixed-focus lenses to switch below the laser generator. At the same time, it drives the second lifting plate to automatically rise and fall inside the limit plate to coordinate with the switching of fixed-focus lenses.

[0009] Preferably, a rotating shaft is fixed to the bottom of the servo motor, and a gear disk is fixed to the bottom of the rotating shaft. A first gear is meshed with both sides of the gear disk. A bevel gear is fixed to one side of the first gear. The first gear is rotatably connected to the connecting shell through a fixed plate. A second gear is rotatably connected inside the limiting plate. A bevel gear is also fixed to the end of the second gear near the first gear. The two bevel gears are meshed with each other. The second gear is meshed with the second lifting plate.

[0010] Preferably, an electric telescopic rod is installed on one side inside the connecting shell, a docking ring is provided at the bottom of the laser generator, a docking slot is provided at the top of the fixed-focus lens, a connecting shaft is fixed in the middle of the first connecting plate, and a second movable frame is rotatably connected to the top of the connecting shaft. Among them, the electric telescopic rod pushes the second moving frame downward, causing the fixed-focus lens to move downward and separate from the laser generator.

[0011] Preferably, a first guide plate is fixed to one side inside the connecting shell, and a first guide rod is fixed to one side of the top of the second movable frame, with the first guide rod slidably connected inside the first guide plate.

[0012] Preferably, a fixing ring is fixed to the bottom end of the second movable frame on the side away from the first guide rod, a second spring is fixed to the bottom end of the fixing ring, a rotating ring is fixed to the bottom end of the second spring, and the bottom end of the rotating ring is fixedly connected to the top end of the second connecting plate. The fixing ring, the second spring and the rotating ring are all sleeved on the outside of the connecting shaft.

[0013] Preferably, a square rod is fixed to the bottom end of the rotating shaft, and a sleeve is fixed to the top end of the connecting shaft, with the square rod inserted inside the sleeve.

[0014] Preferably, a fixed sleeve is provided on the outside of the fixed lens, and a first lifting plate is fixed to the end of the fixed sleeve away from the fixed lens. A guide frame is fixed to the outside of the first connecting plate, and a second guide rod is fixed inside the guide frame. The first lifting plate is slidably connected to the inside of the guide frame, and the second guide rod passes through the inside of the first lifting plate. A first spring is provided inside the second guide rod, and the top end of the first spring is fixedly connected to the first lifting plate, and the bottom end of the first spring is fixedly connected to the first connecting plate.

[0015] Preferably, connecting arms are fixed on both sides of the top of the second connecting plate, and a cover is fixed on the other end of the connecting arm; Among them, the two fixed-focus lenses, which are far from the laser generator, are engaged at the bottom of the cover by the spring force of the first spring.

[0016] Preferably, a second guide plate is provided on the side of the first connecting plate near the laser generator, and the bottom end of the second guide plate is attached to the top of the first lifting plate near the laser generator.

[0017] Preferably, a connecting frame is fixed to the top of the second guide plate, and the top of the connecting frame is fixedly connected to the second movable frame.

[0018] The beneficial effects of this invention are as follows: 1. The laser cutting equipment for manufacturing machine tool accessories of the present invention has multiple fixed-focus lenses arranged on the outside of the first connecting plate. The rotation of the servo motor drives the fixed-focus lenses to rotate and switch the fixed-focus lenses with different focal lengths to the bottom of the laser generator through the first connecting plate, thereby changing the focal length of the laser generator. This can be used to deal with metal plates of different materials. The external switching method can prevent the wear problem caused by the traditional internal lens position.

[0019] 2. The laser cutting equipment for manufacturing machine tool accessories of the present invention uses a second lifting plate to move up and down between limit plates. It can be used in conjunction with the first connecting plate to drive the fixed-focus lens to rotate. The longer the fixed-focus lens below the laser generator is, the longer the distance that the second lifting plate drives the laser generator to rise, thereby preventing the fixed-focus lens from contacting the metal plate due to excessive length and causing wear. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the laser generator structure in this invention; Figure 3 This is a schematic diagram of the internal structure of the connecting shell in this invention; Figure 4 This is a schematic diagram of the internal structure of the sleeve in this invention; Figure 5 This is a schematic diagram of the lens structure in this invention; Figure 6 This is a schematic diagram of the second guide plate structure in this invention; Figure 7 This is a schematic diagram of the internal structure of the guide frame in this invention; Figure 8 This is a schematic diagram of the cover structure in this invention.

[0022] In the diagram: 1. Cutting table; 11. First moving frame; 111. Moving table; 2. Laser generator; 21. Fixed-focus lens; 211. Fixing sleeve; 212. First lifting plate; 22. Connecting shell; 221. Electric telescopic rod; 222. Limiting plate; 223. First guide plate; 224. First guide rod; 225. Second moving frame; 226. Connecting frame; 227. Second guide plate; 23. Servo motor; 231. Rotating shaft; 232. Gear plate; 233. First gear; 234. Second gear; 235. Second lifting plate; 236. Square rod; 237. Sleeve; 24. First connecting plate; 241. Guide frame; 242. Second guide rod; 243. First spring; 244. Connecting shaft; 25. Second connecting plate; 251. Connecting arm; 252. Cover; 253. Fixing ring; 254. Second spring; 255. Rotating ring. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0024] like Figures 1 to 5 As shown in the figure, a laser cutting device for manufacturing machine tool accessories according to an embodiment of the present invention includes a cutting table 1, a first movable frame 11 is provided at the top of the cutting table 1, a movable stage 111 is provided on one side of the first movable frame 11, a connecting shell 22 is fixed on the side of the movable stage 111 away from the first movable frame 11, and a laser generator 2 is provided on the side of the connecting shell 22 away from the movable stage 111. It also includes a first connecting plate 24, on the outer side of the first connecting plate 24, a plurality of fixed-focus lenses 21 are equally spaced, one of the fixed-focus lenses 21 is located at the bottom of the laser generator 2, a servo motor 23 is installed at the top of the connecting shell 22, a pair of limiting plates 222 are fixed on the side of the connecting shell 22 near the laser generator 2, a second lifting plate 235 is slidably connected between the limiting plates 222, and the second lifting plate 235 is fixedly connected to the laser generator 2; The servo motor 23 rotates to drive the first connecting plate 24 to switch multiple fixed-focus lenses 21 below the laser generator 2, and at the same time drives the second lifting plate 235 to automatically lift and lower inside the limiting plate 222 to cooperate with the switching of fixed-focus lenses 21. When using the machine tool, some accessories are used. During the manufacturing process, these accessories require cutting metal sheets to the required dimensions. To minimize cutting errors, laser cutting is employed. During cutting, the metal sheet is placed on top of the cutting table 1, inside the first moving frame 11. Then, the laser generator 2 is activated, emitting a laser beam that passes through the fixed-focus lens 21. The fixed-focus lens 21 zooms in on the laser beam and illuminates the metal sheet, causing it to cut. Simultaneously, the first moving frame 11 and the moving table 111 move the laser generator 2 laterally and longitudinally, cutting the metal sheet according to a preset cutting path. The metal sheet is then cut to the required size and shape. However, during the cutting process, the material of the metal sheet may... Different materials require different focal lengths of fixed-focus lenses 21. At this time, the servo motor 23 is started to drive the first connecting plate 24 to rotate. The first connecting plate 24 has multiple sets of fixed-focus lenses 21 arranged in order of focal length. The first connecting plate 24 drives the fixed-focus lenses 21 to move away from below the laser generator 2, and selects the fixed-focus lens 21 with the corresponding focal length according to the material of the metal plate. The first connecting plate 24 rotates the fixed-focus lens 21 with the corresponding focal length to below the laser generator 2. This method can directly achieve zoom by switching different lenses. The position of the internal structure will not change. It will not wear out after long-term use and can prevent the wear caused by the internal zoom of traditional lenses by moving the lens. The longer the focal length of each fixed-focus lens 21, the longer its length. When a longer fixed-focus lens 21 is used below the laser generator 2, it may come into contact with the metal plate, affecting the displacement of the laser generator 2 during cutting. Therefore, when the servo motor 23 drives the first connecting plate 24 to rotate and select the fixed-focus lens 21, it will simultaneously drive the second lifting plate 235 to slide between the limiting plates 222. In the initial state, the fixed-focus lens 21 with the smallest focal length is placed below the laser generator 2. At this time, the second lifting plate 235 drives the laser generator 2 to extend to the lowest position. When the servo motor 23 drives the first connecting plate 24 to rotate and switch the fixed-focus lens 21, the servo motor 23 simultaneously drives the second lifting plate 235 to rise. The longer the fixed-focus lens 21 is switched below the laser generator 2, the higher the laser generator 2 is raised by the second lifting plate 235. This can realize automatic adjustment of the height of the laser generator 2 according to the length of the fixed-focus lens 21.

[0025] like Figures 1 to 4As shown, a rotating shaft 231 is fixed to the bottom of the servo motor 23, and a gear disk 232 is fixed to the bottom of the rotating shaft 231. A first gear 233 is meshed with both sides of the gear disk 232. A bevel gear is fixed to one side of the first gear 233. The first gear 233 is rotatably connected to the connecting shell 22 through a fixing plate. A second gear 234 is rotatably connected inside the limiting plate 222. A bevel gear is also fixed to one end of the second gear 234 near the first gear 233. The two bevel gears mesh with each other. The second gear 234 meshes with the second lifting plate 235. When the second lifting plate 235 needs to lift the laser generator 2, the servo motor 23 is started to drive the rotating shaft 231 to rotate. At this time, the rotating shaft 231 drives the gear disk 232 to rotate, and the gear disk 232 drives the first gear 233 to rotate. The first gear 233 drives the bevel gear of the second gear 234 to rotate through the bevel gear at the end. At this time, the second gear 234 will drive the second lifting plate 235 to lift between the two limit plates 222. The greater the angle of rotation of the first connecting plate 24 driven by the servo motor 23, the higher the second lifting plate 235 is lifted by the second gear 234, so that the height of the laser generator 2 can automatically adapt to the length of the fixed-focus lens 21.

[0026] like Figures 3 to 6 As shown, an electric telescopic rod 221 is installed on one side inside the connecting shell 22, a docking ring is provided at the bottom of the laser generator 2, a docking slot is provided at the top of the fixed-focus lens 21, a connecting shaft 244 is fixed in the middle of the first connecting plate 24, and a second moving frame 225 is rotatably connected to the top of the connecting shaft 244. Among them, the electric telescopic rod 221 pushes the second moving frame 225 downward, causing the fixed-focus lens 21 to move downward and separate from the laser generator 2; Before switching the fixed-focus lens 21, the docking ring of the laser generator 2 and the docking slot of the fixed-focus lens 21 need to be separated. At this time, the electric telescopic rod 221 is activated to drive the second moving frame 225 to move downward. The second moving frame 225 can drive the connecting shaft 244 to push the first connecting plate 24 downward. The first connecting plate 24 will then drive multiple fixed-focus lenses 21 to descend simultaneously. The docking slots of the fixed-focus lenses 21 will also separate from the docking ring of the laser generator 2. Then, the first connecting plate 24 will drive the fixed-focus lenses 21 to rotate and switch the required fixed-focus lens 21 to below the laser generator 2, which can realize the automatic separation of the laser generator 2 and the fixed-focus lens 21.

[0027] like Figures 3 to 6 As shown, a first guide plate 223 is fixed to one side inside the connecting shell 22, and a first guide rod 224 is fixed to one side of the top of the second movable frame 225. The first guide rod 224 is slidably connected to the inside of the first guide plate 223. When the electric telescopic rod 221 needs to push the second movable frame 225, the output shaft of the electric telescopic rod 221 will push the first guide rod 224. The first guide rod 224 pushes the second movable frame 225 downward, thereby causing the second movable frame 225 to drive the connecting shaft 244 to descend. The second movable frame 225 can be limited by the first guide plate 223 and the first guide rod 224.

[0028] like Figures 3 to 6 As shown, a fixing ring 253 is fixed to the bottom end of the second movable frame 225 on the side away from the first guide rod 224. A second spring 254 is fixed to the bottom end of the fixing ring 253. A rotating ring 255 is fixed to the bottom end of the second spring 254. The bottom end of the rotating ring 255 is fixedly connected to the top end of the second connecting plate 25. The fixing ring 253, the second spring 254 and the rotating ring 255 are all sleeved on the outside of the connecting shaft 244. When the fixed-focus lens 21 needs to be separated from the laser generator 2, the second moving frame 225 drives the connecting shaft 244 to move downward. The second moving frame 225 compresses the second spring 254 through the fixing ring 253. When the fixed-focus lens 21 needs to be engaged with the laser generator 2, the output shaft of the electric telescopic rod 221 retracts. At this time, the second spring 254 pushes the fixing ring 253 to drive the second moving frame 225 to push the first guide rod 224, which can make the first guide rod 224 automatically reset, so as to automatically engage the laser generator 2 and the fixed-focus lens 21.

[0029] like Figures 3 to 5 As shown, a square rod 236 is fixed to the bottom end of the rotating shaft 231, and a sleeve 237 is fixed to the top end of the connecting shaft 244. The square rod 236 is inserted into the sleeve 237. When the servo motor 23 needs to drive the first connecting plate 24 to rotate, the servo motor 23 drives the rotating shaft 231 to rotate, the rotating shaft 231 drives the square rod 236 to rotate, and the square rod 236 drives the connecting shaft 244 to rotate through the sleeve 237, which can cause the first connecting plate 24 to rotate. At this time, the first connecting plate 24 can drive the fixed-focus lens 21 to rotate. When the electric telescopic rod 221 pushes the second moving frame 225 to descend, the sleeve 237 will slide outside the square rod 236. At this time, the connection between the square rod 236 and the sleeve 237 can be maintained. When the second lifting plate 235 drives the laser generator 2 to rise, it will synchronously drive the second connecting plate 25 to rise. The connecting plate 25 can drive the second movable frame 225, sleeve 237 and the entire structure below to move upward through the rotating ring 255, the second spring 254 and the fixing ring 253. At this time, there is enough space inside the sleeve 237 for the square rod 236 to extend into the sleeve 237. When the second movable frame 225 rises, it will drive the first guide rod 224 to rise. At this time, the distance between the first guide rod 224 and the electric telescopic rod 221 is shortened, and the distance that the electric telescopic rod 221 pushes downward is automatically reduced to adapt to the current position of the first guide rod 224, so as to maintain the connection between the sleeve 237 and the square rod 236.

[0030] like Figures 2 to 7 As shown, a fixed sleeve 211 is fitted around the fixed lens 21. A first lifting plate 212 is fixed to the end of the fixed sleeve 211 away from the fixed lens 21. A guide frame 241 is fixed to the outside of the first connecting plate 24. A second guide rod 242 is fixed inside the guide frame 241. The first lifting plate 212 is slidably connected to the inside of the guide frame 241. The second guide rod 242 passes through the inside of the first lifting plate 212. A first spring 243 is fitted inside the second guide rod 242. The top end of the first spring 243 is fixedly connected to the first lifting plate 212, and the bottom end of the first spring 243 is fixedly connected to the first connecting plate 24. When one of the fixed-focus lenses 21 is in use, the other fixed-focus lenses 21 may be longer than the one being used. This could cause the longer fixed-focus lens 21 to come into contact with the metal plate. To prevent this problem, a guide frame 241 is provided on the outside of the first connecting plate 24. A fixing sleeve 211 is fitted over the fixed-focus lens 21. The fixing sleeve 211 slides inside the guide frame 241 via a first lifting plate 212 at its end. The elastic force of the first spring 243 will push the first lifting plate 212 to the highest point inside the guide frame 241. At this time, the fixed-focus lens 21 away from the laser generator 2 will rise to the highest position, which can prevent the other fixed-focus lenses 21 from coming into contact with the metal plate when the fixed-focus lens 21 below the laser generator 2 is in use.

[0031] like Figures 2 to 8As shown, connecting arms 251 are fixed on both sides of the top of the second connecting plate 25, and a cover 252 is fixed on the other end of the connecting arm 251. Among them, the top ends of the two fixed-focus lenses 21, which are far away from the laser generator 2, are engaged with the bottom end of the cover 252 under the elastic force of the first spring 243; During use, the second guide plate 227 will press down the first lifting plate 212 on the side closest to the laser generator 2 to the lowest position, while the other first lifting plates 212 will rise to the highest position due to the elastic force of the first spring 243. At this time, the cover 252 can seal the top of the fixed-focus lens 21 to prevent dust from entering the fixed-focus lens 21. When the electric telescopic rod 221 drives the first connecting plate 24 to descend, the first connecting plate 24 will drive the first lifting plate 212, the fixing sleeve 211 and the fixed-focus lens 21 to descend through the guide frame 241. At this time, the fixed-focus lens 21 can be separated from the cover 252, so that the cover 252 does not affect the rotation of the fixed-focus lens 21 which is far away from the laser generator 2.

[0032] like Figures 2 to 7 As shown, a second guide plate 227 is provided on the side of the first connecting plate 24 near the laser generator 2. The bottom end of the second guide plate 227 is attached to the top end of the first lifting plate 212 on the side near the laser generator 2. When the first connecting plate 24 drives the fixed-focus lens 21 to rotate, the first lifting plate 212 rotates synchronously, and the second guide plate 227 remains in its original position. At this time, the first lifting plate 212 on the side closer to the laser generator 2 loses the limit of the second guide plate 227, and the first spring 243 will push the first lifting plate 212 to rise. The first lifting plate 212 rotating towards the laser generator 2 will be guided by the edge of the second guide plate 227 and will gradually move downward until it moves directly below the second guide plate 227. In this way, the fixed-focus lens 21 that has moved below the laser generator 2 extends downward, while the fixed-focus lens 21 that is away from the laser generator 2 is raised to the highest position, thereby preventing the bottom of the lens away from the laser generator 2 from contacting the metal plate.

[0033] like Figures 2 to 7 As shown, a connecting frame 226 is fixed to the top of the second guide plate 227, and the top of the connecting frame 226 is fixedly connected to the second movable frame 225. The second guide plate 227 is connected to the second movable frame 225 through the connecting frame 226, so that the distance between the second guide plate 227 and the first connecting plate 24 is always the same, and the effect of the second guide plate 227 on the first lifting plate 212 will not be affected by the lifting and lowering of the laser generator 2.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A laser cutting device for manufacturing machine tool accessories, characterized in that: It includes a cutting table, a first movable frame is provided at the top of the cutting table, a movable stage is provided on one side of the first movable frame, a connecting shell is fixed on the side of the movable stage away from the first movable frame, and a laser generator is provided on the side of the connecting shell away from the movable stage. It also includes a first connecting plate, on the outer side of which multiple fixed-focus lenses are equally spaced. One of the fixed-focus lenses is located at the bottom of the laser generator. A servo motor is installed at the top of the connecting shell. A pair of limiting plates are fixed on the side of the connecting shell near the laser generator. A second lifting plate is slidably connected between the limiting plates. The second lifting plate is fixedly connected to the laser generator. The servo motor rotates to drive the first connecting plate to switch multiple fixed-focus lenses below the laser generator, while simultaneously driving the second lifting plate to automatically rise and fall within the limit plate to coordinate with the switching of fixed-focus lenses. A rotating shaft is fixed to the bottom of the servo motor, and a gear plate is fixed to the bottom of the rotating shaft. A first gear is meshed with both sides of the gear plate. A bevel gear is fixed to one side of the first gear. The first gear is rotatably connected to the connecting shell through a fixed plate. A second gear is rotatably connected inside the limiting plate. A bevel gear is also fixed to the end of the second gear near the first gear. The two bevel gears are meshed with each other. The second gear is meshed with the second lifting plate. An electric telescopic rod is installed on one side inside the connecting shell, a docking ring is provided at the bottom of the laser generator, a docking slot is provided at the top of the fixed-focus lens, a connecting shaft is fixed in the middle of the first connecting plate, and a second movable frame is rotatably connected to the top of the connecting shaft. Among them, the electric telescopic rod pushes the second moving frame downward, causing the fixed-focus lens to move downward and separate from the laser generator; A first guide plate is fixed to one side inside the connecting shell, and a first guide rod is fixed to one side of the top of the second movable frame. The first guide rod is slidably connected to the inside of the first guide plate. A fixing ring is fixed at the bottom of the second movable frame on the side away from the first guide rod. A second spring is fixed at the bottom of the fixing ring, and a rotating ring is fixed at the bottom of the second spring. The bottom of the rotating ring is fixedly connected to the top of the second connecting plate. The fixing ring, the second spring, and the rotating ring are all sleeved on the outside of the connecting shaft. A second guide plate is provided above the first connecting plate on the side near the laser generator, and the bottom end of the second guide plate is attached to the top of the first lifting plate on the side near the laser generator. A connecting frame is fixed to the top of the second guide plate, and the top of the connecting frame is fixedly connected to the second movable frame. A fixed sleeve is fitted around the fixed lens, and a first lifting plate is fixed to the end of the fixed sleeve away from the fixed lens.

2. The laser cutting equipment for manufacturing machine tool accessories according to claim 1, characterized in that: A square rod is fixed to the bottom of the rotating shaft, and a sleeve is fixed to the top of the connecting shaft. The square rod is inserted inside the sleeve.

3. The laser cutting equipment for manufacturing machine tool accessories according to claim 1, characterized in that: A guide frame is fixed to the outside of the first connecting plate, and a second guide rod is fixed inside the guide frame. The first lifting plate is slidably connected inside the guide frame. The second guide rod passes through the inside of the first lifting plate. A first spring is sleeved inside the second guide rod. The top end of the first spring is fixedly connected to the first lifting plate, and the bottom end of the first spring is fixedly connected to the first connecting plate.

4. The laser cutting equipment for manufacturing machine tool accessories according to claim 3, characterized in that: Connecting arms are fixed to both sides of the top of the second connecting plate, and a cover is fixed to the other end of the connecting arm. Among them, the two fixed-focus lenses, which are far from the laser generator, are engaged at the bottom of the cover by the spring force of the first spring.

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