A light-shielding fiber laser coupling machine

Abstract

The present invention relates to the technical field of fiber laser couplers, and in particular to a light-shielding fiber laser coupler. The present invention provides a light-shielding fiber laser coupler that can block lasers in all directions. A light-shielding fiber laser coupler includes a housing, a movable table, a mold, a light-shielding frame, a cylinder, a laser emitter, and a shielding mechanism. The lower part of the housing is slidably connected to the movable table, the upper part of the movable table is slidably connected to the mold, the upper side of the rear wall of the housing is connected to the cylinder, the laser emitter is connected to the telescopic rod of the cylinder, the upper front side of the housing is connected to the light-shielding frame, and the housing is provided with a shielding mechanism. During the coupling process of the workpieces, the shielding member will shield the laser irradiated into the mold in all directions to prevent the laser in the mold from radiating outward and prevent the eyes of the staff from being irradiated by the laser, thereby improving the safety during coupling and protecting the safety of the staff.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber laser couplers, and in particular to an optical fiber laser coupler capable of shielding light. Background Art

[0002] During the production process of workpieces, fiber laser coupling machines are often used to couple the workpieces.

[0003] The patent with the authorization announcement CN214185716U discloses a fiber laser coupling device, including a base, a mobile platform, a fixture, a mobile platform driving mechanism, a fixture driving mechanism, a laser emitting assembly and a light blocking mechanism. A fixture opposite to the fixture is provided on the mobile platform, a fixed frame is provided on the base, and the fixture driving mechanism is fixed on the fixed frame. When in use, first install the two workpieces on the fixture and the fixture respectively, then bring the two workpieces close together, and then use the laser emitting tube to emit laser to couple the two workpieces. During the workpiece coupling process, the light blocking plate will block the gap between the front side of the fixture and the front side of the fixture. However, when the fiber laser coupling device using this patent is used to couple the workpieces, the light blocking plate can only block the laser irradiated forward, and the laser will irradiate from other directions, so the effect of blocking the laser is poor, and the laser is easy to irradiate the eyes of other workers.

[0004] In order to improve the effect of resisting laser, a light-shielding fiber laser coupling machine is specially developed which can resist laser in all directions. Summary of the invention

[0005] In order to overcome the disadvantage that the light shielding plate can only block the laser irradiated forward and the laser will be irradiated from other directions, thus the effect of blocking the laser is poor, the present invention provides a light-shielding fiber laser coupling machine that can block the laser in multiple directions.

[0006] A light-shielding optical fiber laser coupling machine comprises a casing, a movable table, a mold, a light-shielding frame, a cylinder, a laser emitter, a shielding mechanism and a positioning mechanism. The lower part of the casing is slidably connected to the movable table, the upper part of the movable table is slidably connected to the mold, the upper side of the rear wall of the casing is connected to the cylinder, the laser emitter is connected to the telescopic rod of the cylinder, the upper front side of the casing is connected to the light-shielding frame, and the casing is provided with a shielding mechanism. During the coupling process of the workpieces, the shielding mechanism covers the upper side of the mold to perform multi-directional shielding on the laser irradiated into the mold. The movable table is provided with a positioning mechanism for positioning the workpiece.

[0007] Further description, the shielding mechanism includes a shielding member, a rack frame, a support rod, a first shielding spring, a gear, a toothed movable frame and a second shielding spring. The shielding member is slidably connected to the upper part of the casing, and the shielding member contacts the upper side of the mold. The lower left rear side of the casing is slidably connected to the toothed movable frame, and the second shielding spring is connected between the lower part of the toothed movable frame and the casing. The second shielding spring is wound around the lower part of the toothed movable frame. A slide groove is opened on the upper part of the toothed movable frame, and the rear of the shielding member passes through the slide groove. A gear is rotatably connected to the middle of the rear of the casing, and the gear is located behind the toothed movable frame, and the gear The gear is meshed with the teeth on the toothed movable frame, and a rack frame is connected to the rear side of the mold. The rack frame and the casing are slidably connected. The rack frame is located below the gear, and the rack frame and the gear are meshed. A support rod is connected to the rear lower part of the casing, and the rack frame and the support rod are slidably connected. A first shielding spring is connected between the rear side of the lower part of the rack frame and the support rod, and the first shielding spring is wound on the support rod. The shielding member moves upward. When the rear part of the shielding member moves upward to the upper side of the slide groove on the toothed movable frame, the shielding member drives the toothed movable frame to move upward, the gear rotates, and the rack frame drives the mold to move forward.

[0008] Further explanation: the positioning mechanism includes a positioning frame, an alignment spring, a support ring, a pull rope and a support frame. The left and right sides of the moving platform are connected to the support frames. The upper part of the support frames is slidably connected to the positioning frames. Alignment springs are connected between the positioning frames and the outer sides of the upper parts of the support frames. The alignment springs are wound on the positioning frames. Support rings are connected to the left and right sides of the front of the moving platform. A pull rope is connected between the front walls of the positioning frames that are away from each other. The pull rope passes through the support ring, and the front part of the pull rope contacts the front side of the moving platform.

[0009] Further description, it also includes a lifting mechanism for blocking the gap between the front side of the mold and the front side of the shielding member, the lifting mechanism includes a lifting rod, a lifting plate, a lifting spring, a block and a block plate, the left and right sides of the rear of the shading frame are slidably connected with lifting rods, the two lifting rods both pass through the front upper side of the casing, the lifting rods are slidably connected to the casing, a lifting plate is connected between the bottoms of the two lifting rods, lifting springs are connected between the left and right sides of the top of the lifting plate and the shading frame, the lifting springs are wound on the lifting rods, a block is connected in the middle of the rear side of the lifting plate, and a block is connected in the middle of the upper front side of the shielding member, the top of the block is in contact with the bottom of the block, the shielding member moves upward to drive the block upward, push the block upward, and the block drives the lifting plate and the lifting rod to move upward.

[0010] Further description, it also includes a clamping mechanism for clamping irregularly shaped workpieces, the clamping mechanism includes a clamping rod and a clamping spring, the side of the positioning frames close to each other is slidably connected with the clamping rod from front to back, the clamping rod and the inner wall of the positioning frame are connected with a clamping spring, and the clamping springs are all wound around the clamping rod.

[0011] Further description, it also includes a limiting mechanism for stabilizing the mold, the limiting mechanism includes a trapezoidal slider and a limiting spring, the trapezoidal slider is slidably connected to the upper left part of the moving platform, and the limiting springs are connected between the front and rear sides of the bottom of the trapezoidal slider and the moving platform.

[0012] Further description, it also includes a fixing mechanism for fixing the workpiece, the fixing mechanism includes a fixing block, a pull rod and a fixing spring, the front side of the mold is slidably connected to the pull rod, the rear side of the pull rod is connected to the fixing block, the left and right sides of the front wall of the fixing block and the front wall inside the mold are connected with fixing springs, and the fixing springs are all wound on the pull rod.

[0013] To further explain, the front of the draw rope has a handle, and the handle is used to pull the draw rope.

[0014] The beneficial effects are: 1. During the coupling process of the workpieces, the shielding member will shield the laser irradiated into the mold from all directions, preventing the laser in the mold from radiating outward and preventing the eyes of the workers from being irradiated by the laser, thereby improving the safety during coupling and protecting the safety of the workers.

[0015] 2. The present invention clamps and positions the workpiece by moving the positioning frame inward, thereby avoiding random movement of the workpiece during the coupling process, preventing position deviation at the coupling point of the workpiece, and improving the accuracy of the coupling.

[0016] 3. The present invention utilizes a lifting plate to block the gap between the front side of the mold and the front side of the shielding member, thereby preventing the laser from irradiating from the gap and irradiating the eyes of the staff in front, thereby improving the effect of shielding the laser.

[0017] 4. The present invention can clamp irregularly shaped workpieces by moving the clamping rod inward, thereby expanding the clamping range and improving practicality.

[0018] 5. The present invention utilizes a trapezoidal slider to limit the mold, thereby improving the stability of the mold and preventing the mold from sliding forward. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the cross-sectional three-dimensional structure of the present invention.

[0021] Figure 3 It is a schematic diagram of a cross-sectional three-dimensional structure of the shielding mechanism of the present invention.

[0022] Figure 4 It is a schematic diagram of the partial three-dimensional structure of the shielding mechanism of the present invention.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the positioning mechanism of the present invention.

[0024] Figure 6 It is a three-dimensional structural schematic diagram of this practical lifting mechanism.

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the clamping mechanism of the present invention.

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the limiting mechanism of the present invention.

[0027] Fig. 9 It is a schematic diagram of the three-dimensional structure of the fixing mechanism of the present invention.

[0028] The names and serial numbers of the parts in the figure are: 1_casing, 2_moving table, 3_mold, 4_light shielding frame, 41_cylinder, 42_laser transmitter, 5_shielding mechanism, 51_shielding member, 52_rack frame, 53_support rod, 54_first shielding spring, 55_gear, 56_toothed moving frame, 57_second shielding spring, 6_positioning mechanism, 61_positioning frame, 62_alignment spring, 63_support ring, 64_pull rope, 65_support frame, 7_lifting mechanism, 71_lifting rod, 72_lifting plate, 73_lifting spring, 74_block, 75_card, 8_pressing mechanism, 81_pressing rod, 82_pressing spring, 9_limiting mechanism, 91_trapezoidal slider, 92_limiting spring, 10_fixing mechanism, 101_fixing block, 102_pull rod, 103_fixing spring. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] Example 1

[0031] A light-shielded fiber laser coupling machine, such as Figure 1 and Figure 2 As shown, it includes a casing 1, a movable table 2, a mold 3, a shading frame 4, a cylinder 41, a laser emitter 42, a shielding mechanism 5 and a positioning mechanism 6. The movable table 2 is slidably connected to the lower part of the casing 1, and the mold 3 is slidably connected to the upper part of the movable table 2. The cylinder 41 is installed on the upper side of the inner rear wall of the casing 1 by bolts, and the laser emitter 42 is connected to the telescopic rod of the cylinder 41. The shading frame 4 is connected to the upper front side of the casing 1. The casing 1 is provided with a shielding mechanism 5, which can shield the laser, and the movable table 2 is provided with a positioning mechanism 6.

[0032] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the shielding mechanism 5 includes a shielding member 51, a rack frame 52, a support rod 53, a first shielding spring 54, a gear 55, a toothed movable frame 56 and a second shielding spring 57. The shielding member 51 is slidably connected to the upper part of the casing 1, and the shielding member 51 contacts the upper side of the mold 3. The lower left rear side of the casing 1 is slidably connected to the toothed movable frame 56. The second shielding spring 57 is connected between the lower part of the toothed movable frame 56 and the casing 1. The second shielding spring 57 is wound around the lower part of the toothed movable frame 56. The upper part of the toothed movable frame 56 is provided with a slide groove. The rear of the shielding member 51 passes through the slide groove. A gear 55 is rotatably connected to the middle of the rear part of the mold 3. The gear 55 is located behind the toothed movable frame 56, and the gear 55 is meshed with the teeth on the toothed movable frame 56. A rack frame 52 is fixed to the rear side of the mold 3. The rack frame 52 is slidably connected to the housing 1. The rack frame 52 is located below the gear 55, and the rack frame 52 and the gear 55 are meshed. A support rod 53 is connected to the rear lower part of the housing 1. The rack frame 52 and the support rod 53 are slidably connected. A first shielding spring 54 is connected between the rear side of the lower part of the rack frame 52 and the support rod 53, and the first shielding spring 54 is wound on the support rod 53.

[0033] like Figure 1 , Figure 2 and Figure 5 As shown, the positioning mechanism 6 includes a positioning frame 61, an alignment spring 62, a support ring 63, a pull rope 64 and a support frame 65. The support frames 65 are welded on the left and right sides of the movable platform 2. The upper part of the support frame 65 is slidably connected with the positioning frame 61. The positioning frame 61 can position the workpiece in the mold 3. Alignment springs 62 are connected between the outer sides of the positioning frame 61 and the upper part of the support frame 65. The alignment springs 62 are wound on the positioning frame 61. There are two support rings 63, and the two support rings 63 are respectively connected to the left and right sides of the front of the movable platform 2. The pull rope 64 is connected between the front walls of the positioning frame 61 on the side away from each other. The pull rope 64 passes through the support ring 63, and the front part of the pull rope 64 contacts the front side of the movable platform 2. The front part of the pull rope 64 is pulled forward, and the positioning frame 61 moves to the side away from each other.

[0034] like Figure 1 , Figure 2 and Figure 5 As shown, the pull rope 64 has a handle at the front, which makes it easy for people to pull the pull rope 64.

[0035] When the optical fiber laser coupling machine is needed to couple the workpieces, the coupling machine can be used to operate. First, the shielding member 51 is moved upward. When the rear part of the shielding member 51 moves upward to the upper side of the slide groove on the toothed movable frame 56, the shielding member 51 drives the toothed movable frame 56 to move upward, the second shielding spring 57 is stretched, and the toothed movable frame 56 moves upward to drive the gear 55 to rotate, and then the rack frame 52 drives the mold 3 to move forward, and the first shielding spring 54 is stretched. When the mold 3 is pulled out, the two workpieces to be coupled are The shielding member 51 is then released, and the shielding member 51 moves downward under its own gravity and covers the upper side of the mold 3. At the same time, the second shielding spring 57 rebounds and drives the toothed movable frame 56 to move downward. The toothed movable frame 56 moves downward and drives the gear 55 to rotate in the opposite direction, so that the rack frame 52 drives the mold 3 to move backward and reset. Then the first shielding spring 54 contracts and resets. When the mold 3 moves backward and resets, the front part of the pull rope 64 is pulled forward, so that the positioning frame 61 moves to the side close to each other, aligning the spring 62. The two workpieces in the mold 3 are compressed. At this time, the positioning frame 61 will clamp and position the two workpieces in the mold 3 to prevent the workpieces from moving randomly during the coupling process, prevent the position of the workpiece coupling from shifting, and improve the accuracy of the coupling. Then, the cylinder 41 is turned on, and the front and rear positions of the laser emitter 42 are adjusted by the cylinder 41, so that the laser emitter 42 is located above the coupling position of the workpieces, and the left and right positions of the mold 3 can be adjusted by moving the movable table 2 left and right. Then, the laser emitter 42 is turned on, and the laser emitter 42 emits a laser to the coupling position of the workpiece, so that the workpieces can be coupled. In the process of coupling the workpieces, the shielding member 51 will shield the laser irradiated into the mold from multiple directions to prevent the eyes of the staff from being irradiated by the laser, thereby improving the safety during coupling. After the workpieces are coupled, the laser emitter 42 is turned off, and then the front part of the pull rope 64 is loosened, and the alignment spring 62 rebounds to move the positioning frame 61 to the side away from each other and reset, so that the positioning frame 61 and the coupled workpiece are separated, and then the mold 3 is pushed forward to take out the coupled workpiece.

[0036] Example 2

[0037] On the basis of Example 1, Figure 1 , Figure 2 and Figure 6As shown, it also includes a lifting mechanism 7, which includes a lifting rod 71, a lifting plate 72, a lifting spring 73, a block 74 and a block plate 75. The left and right sides of the rear of the shading frame 4 are slidably connected with the lifting rods 71, and the two lifting rods 71 ​​pass through the front upper side of the casing 1. The lifting rods 71 ​​are slidably connected to the casing 1. The lifting plate 72 is fixedly connected between the bottoms of the two lifting rods 71. The lifting plate 72 can expand the shading range of the shading frame 4. The left and right sides of the top of the lifting plate 72 and the shading frame 4 are connected with lifting springs 73, and the lifting springs 73 are wound on the lifting rod 71. The block 74 is connected in the middle of the rear side of the lifting plate 72, and the block plate 75 is connected in the middle of the upper front side of the shielding member 51. The top of the block plate 75 contacts the bottom of the block 74, and the upward movement of the block plate 75 can push the block 74 upward.

[0038] When it is necessary to block the laser emitted from the gap between the mold 3 and the shielding member 51, the lifting mechanism 7 can be used to operate. When the shielding member 51 moves upward, the shielding member 51 will also drive the card plate 75 to move upward. The card plate 75 moves upward to push the card block 74 upward, and then drives the lifting plate 72 and the lifting rod 71 to move upward. The lifting spring 73 is compressed, which will not affect the forward movement of the mold 3. When the shielding member 51 drives the card plate 75 to move downward, under the elastic action of the lifting spring 73, the lifting plate 72 drives the lifting rod 71 to move downward and reset. At this time, the lifting plate 72 will block the gap between the front side of the mold 3 and the front side of the shielding member 51, so as to prevent the laser from irradiating from the gap between the front side of the mold 3 and the front side of the shielding member 51, and prevent the laser from irradiating the eyes of the staff in front, thereby improving the effect of blocking the laser.

[0039] like Figure 2 and Figure 7 As shown, it also includes a clamping mechanism 8, which includes a clamping rod 81 and a clamping spring 82. The side of the positioning frame 61 that is close to each other is slidably connected with the clamping rod 81 from front to back. The clamping rod 81 can clamp irregular workpieces. A clamping spring 82 is connected between the clamping rod 81 and the inner wall of the positioning frame 61, and the clamping spring 82 is wound around the clamping rod 81.

[0040] If it is necessary to couple irregularly shaped workpieces, during the coupling process, the clamping mechanism 8 can be used to clamp the irregularly shaped workpieces. When the positioning frame 61 moves toward the side close to each other, the positioning frame 61 will also drive the clamping rod 81 to move inward. When the clamping rod 81 moves inward and contacts the irregular workpiece, the clamping rod 81 will adaptively move inward and outward according to the shape of the workpiece, and the clamping spring 82 will adaptively deform. In this way, irregular workpieces can be clamped, thereby widening the range of use. After the irregular workpieces are coupled, the positioning frame 61 drives the clamping rod 81 to move outward. Under the elastic action of the clamping spring 82, the clamping rod 81 moves and resets. In summary, during the coupling process of irregularly shaped workpieces, the clamping rod 81 can be used to clamp the irregular workpieces to improve practicality.

[0041] like Figure 2 and Figure 8 As shown, it also includes a limiting mechanism 9, which includes a trapezoidal slider 91 and a limiting spring 92. The trapezoidal slider 91 is slidably connected to the upper left part of the moving platform 2. The trapezoidal slider 91 can be inserted into the mold 3 to limit the mold 3. The limiting spring 92 is connected between the front and rear sides of the bottom of the trapezoidal slider 91 and the moving platform 2.

[0042] If it is necessary to limit the mold 3, the limiting mechanism 9 can be used for operation. When the mold 3 moves forward, the mold 3 will squeeze the trapezoidal slider 91 downward, and the limiting spring 92 is compressed. When the mold 3 moves backward, the limiting spring 92 rebounds and moves the trapezoidal slider 91 upward, so that the trapezoidal slider 91 is stuck in the lower part of the mold 3. In this way, the mold 3 can be limited, and the mold 3 can be prevented from moving randomly during the coupling of the workpieces, thereby improving the stability of the mold 3 and also making the coupling effect better.

[0043] like Figure 1 , Figure 2 and Fig. 9 As shown, it also includes a fixing mechanism 10, which includes a fixing block 101, a pull rod 102 and a fixing spring 103. The pull rod 102 is slidably connected to the front side of the mold 3, and the rear side of the pull rod 102 is connected to the fixing block 101. The fixing springs 103 are connected between the left and right sides of the front wall of the fixing block 101 and the inner front wall of the mold 3, and the fixing springs 103 are all wound on the pull rod 102.

[0044] When the workpiece needs to be further fixed, the fixing mechanism 10 can be used for operation. First, the fixing block 101 is pulled forward by the pull rod 102, and the fixing spring 103 is compressed. Then the workpiece is placed in the mold 3. After the workpiece is placed, the pull rod 102 is released, and the fixing spring 103 rebounds and drives the fixing block 101 and the pull rod 102 to move backward, so that the fixing block 101 fixes the workpiece and improves the stability of the workpiece.

[0045] While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.

Claims

1. A light-shielding optical fiber laser coupling machine, comprising a housing (1), a movable table (2), a mold (3), a light-shielding frame (4), a cylinder (41) and a laser emitter (42), wherein the lower portion of the housing (1) is slidably connected to the movable table (2), the upper portion of the movable table (2) is slidably connected to the mold (3), the upper side of the inner rear wall of the housing (1) is connected to the cylinder (41), the telescopic rod of the cylinder (41) is connected to the laser emitter (42), and the upper front side of the housing (1) is connected to the light-shielding frame (4), wherein: Also includes There are a shielding mechanism (5) and a positioning mechanism (6), the shielding mechanism (5) is provided on the housing (1), during the workpiece coupling process, the shielding mechanism (5) covers the upper side of the mold (3) to perform multi-directional shielding on the laser irradiated into the mold (3), and the positioning mechanism (6) for positioning the workpiece is provided on the moving platform (2); The shielding mechanism (5) comprises a shielding member (51), a rack frame (52), a support rod (53), a first shielding spring (54), a gear (55), a toothed movable frame (56) and a second shielding spring (57). The shielding member (51) is slidably connected to the upper part of the casing (1). The shielding member (51) contacts the upper side of the mold (3). The lower left rear part of the casing (1) is slidably connected to the toothed movable frame (56). The second shielding spring (57) is connected between the lower part of the toothed movable frame (56) and the casing (1). The second shielding spring (57) is wound around the lower part of the toothed movable frame (56). The upper part of the toothed movable frame (56) is provided with a slide groove. The rear part of the shielding member (51) passes through the slide groove. The middle part of the rear part of the casing (1) is rotatably connected to the gear (55). The gear (55) is located behind the toothed movable frame (56). The gear (55) and the toothed movable frame (56) are connected to each other. The teeth on the movable frame (56) are meshed with each other, the rear side of the mold (3) is connected to a rack frame (52), the rack frame (52) and the housing (1) are slidably connected, the rack frame (52) is located below the gear (55), and the rack frame (52) and the gear (55) are meshed with each other, the rear lower part of the housing (1) is connected to a support rod (53), the rack frame (52) and the support rod (53) are slidably connected, a first shielding spring (54) is connected between the rear side of the lower part of the rack frame (52) and the support rod (53), the first shielding spring (54) is wound on the support rod (53), the shielding member (51) moves upward, and when the rear part of the shielding member (51) moves upward to the upper side of the slide groove on the toothed movable frame (56), the shielding member (51) drives the toothed movable frame (56) to move upward, the gear (55) rotates, and the rack frame (52) drives the mold (3) to move forward.

2. A light-shielded optical fiber laser coupling machine according to claim 1, characterized in that: The positioning mechanism (6) comprises a positioning frame (61), an alignment spring (62), a support ring (63), a pull rope (64) and a support frame (65). The left and right sides of the movable platform (2) are connected to the support frames (65). The upper part of the support frames (65) is slidably connected to the positioning frame (61). The outer sides of the upper parts of the positioning frame (61) and the support frame (65) are connected to the alignment springs (62). The alignment springs (62) are wound around the positioning frame (61). The left and right sides of the front part of the movable platform (2) are connected to the support ring (63). The pull rope (64) is connected between the front walls of the positioning frame (61) that are away from each other. The pull rope (64) passes through the support ring (63), and the front part of the pull rope (64) contacts the front side of the movable platform (2).

3. A light-shielded optical fiber laser coupling machine according to claim 2, characterized in that: The invention also comprises a lifting mechanism (7) for shielding a gap between the front side of the mold (3) and the front side of the shielding member (51), the lifting mechanism (7) comprising a lifting rod (71), a lifting plate (72), a lifting spring (73), a clamping block (74) and a clamping plate (75), the left and right sides of the rear of the light shielding frame (4) are both slidably connected to the lifting rods (71), the two lifting rods (71) both pass through the front upper side of the housing (1), the lifting rods (71) are both slidably connected to the housing (1), the lifting plate (72) is connected between the bottoms of the two lifting rods (71), and the lifting rods (71) are connected to the housing (1). Lifting springs (73) are connected between the left and right sides of the top of the descending plate (72) and the light shielding frame (4), and the lifting springs (73) are all wound around the lifting rod (71). A clamping block (74) is connected to the middle of the rear side of the lifting plate (72), and a clamping plate (75) is connected to the middle of the upper front side of the shielding member (51). The top of the clamping plate (75) contacts the bottom of the clamping block (74). When the shielding member (51) moves upward, the clamping plate (75) moves upward, pushing the clamping block (74) upward, and the clamping block (74) drives the lifting plate (72) and the lifting rod (71) to move upward.

4. A light-shielded optical fiber laser coupling machine according to claim 3, characterized in that: The invention also comprises a clamping mechanism (8) for clamping irregularly shaped workpieces, the clamping mechanism (8) comprising a clamping rod (81) and a clamping spring (82), the clamping rod (81) being slidably connected to one side of the positioning frame (61) close to each other from front to back, the clamping spring (82) being connected between the clamping rod (81) and the inner wall of the positioning frame (61), and the clamping spring (82) being wound around the clamping rod (81).

5. A light-shielded optical fiber laser coupling machine according to claim 4, characterized in that: It also includes a limiting mechanism (9) for stabilizing the mold (3), the limiting mechanism (9) including a trapezoidal slider (91) and a limiting spring (92), the upper left portion of the movable platform (2) is slidably connected to the trapezoidal slider (91), and the limiting spring (92) is connected between the front and rear sides of the bottom of the trapezoidal slider (91) and the movable platform (2).

6. A light-shielded optical fiber laser coupling machine according to claim 5, characterized in that: It also includes a fixing mechanism (10) for fixing the workpiece, the fixing mechanism (10) including a fixing block (101), a pull rod (102) and a fixing spring (103), the front side of the mold (3) is slidably connected to the pull rod (102), the rear side of the pull rod (102) is connected to the fixing block (101), the left and right sides of the front wall of the fixing block (101) and the inner front wall of the mold (3) are connected to the fixing spring (103), and the fixing spring (103) is wound around the pull rod (102).

7. A light-shielded optical fiber laser coupling machine according to claim 2, characterized in that: The pull rope (64) has a handle at the front, and the handle is used to pull the pull rope (64).

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