A fiber laser internal expansion QBH joint

Abstract

The present invention discloses a fiber laser internal expansion type QBH connector, which relates to the field of laser processing technology, including an outer sleeve and an inner sleeve, and also includes a rotary cover, which is threadedly connected to the inner sleeve, and a locking ring is sleeved between the rotary cover and the inner sleeve, and a plurality of positioning pins are inserted into the inner wall of the locking ring, and a waist hole for the positioning pins to move is opened on the inner sleeve, and a conical table is fixed in the outer sleeve, and the central conical hole of the conical table and the inner sleeve are on the same axis, and the outer edge of the top surface of the conical table is movably connected with a plurality of elastic abutments distributed in an annular manner, and the top of the elastic abutment is inclined against the locking ring, and a bidirectional limiting mechanism matching the elastic abutment is inserted into the inner wall of the outer sleeve. The present invention presses down and twists the locking ring by setting a rotary cover, and when the optical fiber connector is inserted into the inner sleeve, the locking ring is rotated to allow the positioning pin to be inserted into the positioning groove reserved on the optical fiber connector, so that the optical fiber connector and the conical hole in the conical table are pressed tightly, and the rotation of the locking ring is limited.

Description

Technical Field

[0001] The invention relates to the technical field of laser processing, in particular to an optical fiber laser internal expansion type QBH joint. Background Art

[0002] Fiber laser cutting has become a trend in the general metal processing industry and is widely used in sheet metal processing, etc., and QBH connectors are required in laser cutting equipment. The QBH connector is located at the top of the laser head and is an important component connecting the laser head and the laser.

[0003] The patent publication number of the existing patent application is: CN220330291U, and the publication date is January 12, 2024. The name of the patent is "A locking connector for a QBH optical fiber head". The patent includes a QBH positioning seat, an upper locking ring, a lower locking ring and a top tightening ring. The inner side of the QBH positioning seat is provided with a pin shaft, and the bottom of the QBH positioning seat is provided with an indicator hole. The indicator hole is used to guide the QBH optical fiber head to be smoothly inserted into the specified position in a fixed direction. The circumferential side wall of the QBH positioning seat is opened. There are three arc grooves, and the upper locking ring is installed on the QBH positioning seat through double threads. The QBH positioning seat is provided with a three-pin shaft, and the three-pin shaft cooperates with the three-arc groove to lock the QBH optical fiber head. The top tightening ring is installed between the upper locking ring and the lower locking ring to prevent loosening. The QBH positioning seat is provided with a dust ring and an anti-drop retaining ring. The lower locking ring is connected to the QBH positioning seat fixing seat through threads. The utility model can make the QBH optical fiber head, welding head and cutting head realize fast and reliable locking and positioning, and can be quickly disassembled and assembled.

[0004] The above application has shortcomings. The existing optical fiber heads generally contact the conical surface in the QBH connector. External factors such as shaking, bending, and collision are inevitable during use, causing the QBH connector or the optical fiber head to become loose or worn. In this way, the reliability of the locking cannot be guaranteed during the next docking and locking. At the same time, even if locked, the coaxiality between the optical fiber head and the QBH connector cannot be guaranteed. Summary of the invention

[0005] The object of the present invention is to provide a fiber laser internal expansion QBH joint to solve the deficiencies in the above-mentioned prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A fiber laser internal expansion type QBH joint, comprising an outer sleeve and an inner sleeve, and also comprising a rotary cover, which is threadedly connected to the inner sleeve, and a locking ring is sleeved between the rotary cover and the inner sleeve, a plurality of positioning pins are inserted into the inner wall of the locking ring, and a waist hole for the positioning pins to move is opened on the inner sleeve, and a conical table is fixed in the outer sleeve, and the central cone hole of the conical table and the inner sleeve are on the same axis, and a plurality of annularly distributed elastic resistance pieces are movably connected to the outer edge of the top surface of the conical table, and the top of the elastic resistance piece is inclined against the locking ring, and a two-way limiting mechanism matching the elastic resistance piece is inserted into the inner wall of the outer sleeve, when the rotary cover is rotated to move the positioning pin in the locking ring along the waist hole to the locking position, the locking ring presses down to push the elastic resistance piece, and the rotary cover pushes the two-way limiting mechanism toward the locking ring until the two-way limiting mechanism limits the elastic resistance piece.

[0008] Preferably, a guide pin is inserted into the inner sleeve, and the guide pin is located above one of the waist holes.

[0009] Preferably, the elastic abutment includes an abutment block, a connecting rod is slidably inserted into the bottom of the abutment block, one end of the connecting rod is fixedly connected to a plug plate, an arc groove matching the plug plate is provided on the outer edge of the top surface of the conical table, a top spring is fixedly connected between the plug plate and the abutment block, a limiting inclined groove abutting against one end of the abutment block is provided at the bottom of the inner sleeve, a slot for a two-way limiting mechanism to be inserted is provided at the other end of the abutment block, and the abutment block is provided with abutment inclined surfaces on both sides of the slot.

[0010] Preferably, the bidirectional limiting mechanism includes an insertion rod vertically movably inserted into the top of the outer sleeve, an abutment rod is installed on the top of the insertion rod horizontally passing through the upper part of the outer sleeve, a return spring is installed between the abutment rod and the insertion rod, one end of the abutment rod is fixedly connected to a wedge-shaped abutment block, and the other end is fixedly connected to a pressing abutment block abutting against a locking ring, and the bottom of the insertion rod is inserted into the slot.

[0011] Preferably, the screw cap sleeve is provided with an adjusting ring, a retaining ring is fixedly connected to the adjusting ring via a plurality of fixing rods, the retaining ring is located above the sleeve, and the upper and lower surfaces of the retaining ring are respectively abutted and matched with a wedge-shaped retaining block.

[0012] Preferably, an L-shaped groove for the fixing rod to move is provided on the rotary cover, and the height of the adjustment ring is greater than the height of the L-shaped groove.

[0013] Preferably, a circle of anti-skid columns is provided on the outer peripheral surface of the rotary cover, and a toothed ring is fixedly connected to the top of the adjustment ring. When the fixing rod in the adjustment ring moves upward along the vertical section of the L-shaped groove, the toothed ring is engaged with the circle of anti-skid columns.

[0014] Preferably, a gasket is vertically slidably sleeved outside the locking ring, the outer wall of the gasket is in contact with the inner wall of the outer sleeve, and a friction ring is embedded in the outer wall of the gasket, and the friction ring is at the same height as the pressing block.

[0015] Preferably, a connecting seat is plugged and installed at the bottom of the outer jacket, and a water-cooling circulation chamber is provided between the connecting seat and the outer jacket.

[0016] Preferably, a plurality of connecting bolts are installed through the connecting seat, and the connecting seat is connected to the outer sleeve and the conical platform in sequence through the connecting bolts, and sealing rings are installed between the outer sleeve, the rotary cover and the conical platform.

[0017] In the above technical scheme, a rotary cover is set to press down and twist the locking ring. After the optical fiber connector is inserted into the inner sleeve, the locking ring is rotated to allow the positioning pin to be inserted into the positioning groove reserved on the optical fiber connector, so that the optical fiber connector and the tapered hole in the tapered table are tightly pressed. When the locking ring descends, it will press the elastic abutment outward, forcing the two-way limit mechanism to insert the elastic abutment, limit the rotation of the locking ring, and ensure the stability of the optical fiber connector connection. At the same time, when the rotary cover is screwed down, the two-way limit mechanisms will synchronously press the side walls of the locking ring from all directions to avoid the axis of the locking ring and the axis of the optical fiber connector from offset. Even if the specifications of the optical fiber connector do not match the inner diameter of the inner sleeve, after the optical fiber connector is completely locked, it can be on the same axis with the inner sleeve and the tapered table to ensure the accuracy of the docking.

[0018] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0019] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of a fiber laser internal expansion QBH joint of the present invention;

[0022] Figure 2 This is an overall cross-sectional view of a fiber laser internal expansion QBH joint of the present invention;

[0023] Figure 3 This is a schematic diagram of the connection between an inner sleeve and a locking ring in a fiber laser internal expansion QBH joint of the present invention;

[0024] Figure 4This is a schematic structural diagram of a jacket in a fiber laser internal expansion QBH joint of the present invention;

[0025] Figure 5 It is a structural schematic diagram of a screw cap in a fiber laser internal expansion QBH joint of the present invention;

[0026] Figure 6 This is a schematic structural diagram of a conical stage in a fiber laser internal expansion QBH joint of the present invention;

[0027] Figure 7 It is an enlarged schematic diagram of point A of a fiber laser internal expansion QBH joint of the present invention;

[0028] Figure 8 It is a structural schematic diagram of a bidirectional limit mechanism in a fiber laser internal expansion QBH joint of the present invention;

[0029] Fig. 9 The figure is a connection diagram of an adjustment ring and a gear ring in a fiber laser internal expansion QBH joint of the present invention.

[0030] Description of reference numerals:

[0031] 1. Outer sleeve; 101. Sealing ring; 2. Inner sleeve; 201. Waist hole; 202. Guide pin; 203. Limiting inclined groove; 3. Screw cap; 301. Adjusting ring; 302. Fixing rod; 303. Stop ring; 304. L-shaped groove; 305. Anti-skid column; 306. Gear ring; 4. Locking ring; 401. Positioning pin; 402. Washer ring; 403. Friction ring; 404. Slide groove; 405. Slide rod; 406. Pad; 5. Conical table; 501. Arc groove; 6. Elastic abutment; 601. Abutment block; 602. Connecting rod; 603. Insert plate; 604. Top spring; 605. Slot; 606. Abutment slope; 7. Two-way limiting mechanism; 701. Insert rod; 702. Abutment rod; 703. Return spring; 704. Wedge-shaped abutment block; 705. Pressing abutment block; 706. Socket; 707. Abutment ring; 8. Connecting seat; 801. Water-cooling circulation chamber; 802. Connecting bolt; 803. Connecting valve. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0033] See also Figure 1-9The embodiment of the present invention provides a fiber laser internal expansion QBH connector, comprising an outer sleeve 1 and an inner sleeve 2, and also comprising a screw cap 3, which is threadedly connected to the inner sleeve 2, and a locking ring 4 is sleeved between the screw cap 3 and the inner sleeve 2, and a plurality of positioning pins 401 are inserted into the inner wall of the locking ring 4, and a waist hole 201 for the positioning pins 401 to move is opened on the inner sleeve 2, and a conical platform 5 is fixed in the outer sleeve 1, and the central conical hole of the conical platform 5 is on the same axis as the inner sleeve 2, and the conical platform 5 A plurality of annularly distributed elastic resists 6 are movably connected to the outer edge of the top surface, and the top of the elastic resist 6 is inclined against the locking ring 4, and a two-way limiting mechanism 7 matching the elastic resist 6 is inserted into the inner wall of the outer sleeve 1. When the rotary cover 3 is rotated to move the positioning pin 401 in the locking ring 4 along the waist hole 201 to the locking position, the locking ring 4 presses down to push the elastic resist 6, and the rotary cover 3 pushes the two-way limiting mechanism 7 toward the locking ring 4 until the two-way limiting mechanism 7 limits the elastic resist 6.

[0034] Specifically, both the outer sleeve 1 and the inner sleeve 2 have positioning red dots. When aligning the clean optical fiber head with the inner sleeve 2 in the QBH connector and inserting it, find the two red dots on the QBH and the one red dot on the optical fiber head, and then align the three red dots to form a straight line, insert the optical fiber head into the inner sleeve 2, and the positioning pin 401 will be stuck in the right-angle entrance of the guide groove on the optical fiber head. Then, turn the screw cap 3 screwed to the inner sleeve 2 clockwise. Since the bottom outer diameter of the locking ring 4 is larger than the top outer diameter, let the screw cap 3 be in place. The locking ring 4 is pressed down and rotated under the action of friction force, driving the positioning pin 401 on the locking ring 4 to enter the horizontal section of the guide groove on the optical fiber head and abut against its inner wall. The positioning pin 401 will also move from one end of the waist hole 201 to the other end, and then the rotary cover 3 continues to be rotated to press the locking ring 4 axially downward. Since the positioning pin 401 has abutted against one side of the inner wall of the waist hole 201 at this time, the rotation of the locking ring 4 is restricted by the positioning pin 401, so that it cannot continue to rotate. When the locking ring 4 moves downward along the axial direction, it passes through The positioning pin 401 transmits the downward pressure to the optical fiber head, and the optical fiber head is forced to move downward toward the conical platform 5, so that the outer conical surface of the optical fiber head is pressed against the inner conical surface of the conical hole in the conical platform 5, and the interference fit between the conical surfaces is used to achieve the purpose of tight fixation, and the locking is completed. At the same time, when the locking ring 4 descends, it will also push the elastic resistance member 6 from the inside to the outside. At this time, each bidirectional limit mechanism 7 is squeezed by the rotary cover 3 and presses the locking ring 4 from different directions to ensure the coaxiality of the locking ring 4 and the inner sleeve 2, so that the locking ring 4 The intersection of the upper multiple positioning pins 401 and the inner sleeve 2 and the conical platform 5 are on the same axis. Then, when the optical fiber head is completely pressed against the tapered hole on the conical platform 5, the elastic resistance member 6 will also move to the bottom of the two-way limiting mechanism 7. The plug-in fixation between the two-way limiting mechanism 7 and the elastic resistance member 6 is used to lock the angle of the locking ring 4, so as to avoid directly twisting the rotary cover 3 to move the positioning pin 401 from the horizontal end of the optical fiber head guide groove to the vertical section, and also prevent the optical fiber head and the QBH connector from loosening easily.

[0035] Compared with the prior art, the embodiment of the present invention sets a rotary cover 3 to press down and twist the locking ring 4. When the optical fiber connector is inserted into the inner sleeve 2, the locking ring 4 is rotated to allow the positioning pin 401 to be inserted into the positioning groove reserved on the optical fiber connector, so that the optical fiber connector and the tapered hole in the tapered platform 5 are tightly pressed. When the locking ring 4 descends, it will press the elastic resistance member 6 outward, forcing the two-way limiting mechanism 7 to insert the elastic resistance member 6 to limit the rotation of the locking ring 4 to ensure the stability of the optical fiber connector connection. At the same time, when the rotary cover 3 is screwed down, the two-way limiting mechanisms 7 will synchronously press the side walls of the locking ring 4 from all directions to avoid the axis center of the locking ring 4 from being offset from the axis center of the optical fiber connector. Even if the specifications of the optical fiber connector do not match the inner diameter of the inner sleeve, after the optical fiber connector is completely locked, it can be on the same axis as the inner sleeve 2 and the tapered platform 5 to ensure the accuracy of docking.

[0036] In a further embodiment of the present invention, a guide pin 202 is inserted into the inner sleeve 2, and the guide pin 202 is located above one of the waist holes 201. Specifically, when the optical fiber head has not been inserted, the guide pin 202 in the inner sleeve 2 and the positioning pin 401 on the locking ring 4 are on the same vertical line. When the optical fiber head is inserted, the guide pin 202 first enters the guide groove on the optical fiber head, and then the positioning pin 401 enters the guide groove, which facilitates the docking between the positioning pin 401 and the optical fiber head. The position of the guide pin 202 is always on the vertical section of the guide groove of the optical fiber head, which prevents the optical fiber head from being relatively deflected in the inner sleeve 2 after being aligned and inserted into the inner sleeve 2, and ensures that the optical fiber head only moves downward in the axial direction when it is against the conical table 5, and does not deflect circumferentially at the same time.

[0037] In a further embodiment of the present invention, the elastic abutment 6 includes an abutment block 601, a connecting rod 602 is slidably inserted at the bottom of the abutment block 601, one end of the connecting rod 602 is fixedly connected to a plug plate 603, an arc groove 501 matching the plug plate 603 is provided on the outer edge of the top surface of the conical platform 5, a top spring 604 is fixedly connected between the plug plate 603 and the abutment block 601, a limiting inclined groove 203 abutting against one end of the abutment block 601 is provided at the bottom of the locking ring 4, a slot 605 for the bidirectional limiting mechanism 7 to be inserted is provided at the other end of the abutment block 601, and abutment inclined surfaces 606 are provided on both sides of the slot 605 of the abutment block 601. Specifically, since one end of the abutment block 601 abuts against the limiting inclined groove 203 on the locking ring 4, when the locking ring 4 rotates to lock the optical fiber head, the abutment block 601 will also take the center of the inner sleeve 2 as the axis. The locking ring 4 is rotated, and as the locking ring 4 is pressed down, the abutment block 601 moves toward the direction of the plug plate 603. The connecting rod 602 on the plug plate 603 is slidably connected with the abutment block 601, so that the relative positions of the plug plate 603 and the abutment block 601 will not be offset, and the top spring 604 will not be twisted and bent. When the abutment block 601 moves from the inside to the outside to the corresponding position, the abutment block 601 rotates to press and lift the two-way limiting mechanism 7 until the two-way limiting mechanism 7 is inserted into the slot 605 on the abutment block 601. The rotation of the locking ring 4 is limited by limiting the position of the abutment block 601, so that the positioning pin 401 in the locking ring 4 always presses and locks the optical fiber head inserted into the inner sleeve 2, and the top spring 604 can reset the abutment block 601 after the two-way limiting mechanism 7 is removed from the abutment block 601, so as to facilitate the secondary plugging and unplugging of the optical fiber head.

[0038] In a further embodiment of the present invention, the two-way limiting mechanism 7 includes an insertion rod 701 vertically movably inserted into the top of the outer jacket 1, and an abutment rod 702 is installed horizontally through the top of the insertion rod 701 above the outer jacket 1, and a reset spring 703 is installed between the abutment rod 702 and the insertion rod 701. A socket 706 adapted to the abutment rod 702 is horizontally opened on the insertion rod 701, and the reset spring 703 is located in the socket 706. One end of the abutment rod 702 is fixedly connected to The wedge-shaped abutment block 704 has a pressing abutment block 705 fixedly connected at the other end to abut against the locking ring 4. The bottom of the plug rod 701 is plugged into the slot 605. One side of the plug rod 701 is fixedly connected to an anti-detachment overlap block, which overlaps the top of the jacket 1. Specifically, when the end cover is screwed down, the abutment rod 702 is forced to translate toward the locking ring 4 by squeezing the wedge-shaped abutment block 704. When squeezing the wedge-shaped abutment block 704, although it provides pressure on the plug rod 701, The anti-dropping overlap block on the plug rod 701 prevents the plug rod 701 from moving downward. When the anti-dropping overlap block is placed on the top of the jacket 1, the bottom of the plug rod 701 is lower than the top surface of the abutment block 601, and before the locking ring 4 is rotated to lock the optical fiber head, the positions of the abutment block 601 and the plug rod 701 are staggered. Until the locking ring 4 is rotated and the optical fiber head is firmly pressed into the tapered hole on the tapered platform 5 by the positioning pin 401, the abutment block 601 moves outward and turns to the plug At rod 701, when the bottom of rod 701 abuts against the abutment slope 606 on abutment block 601, rod 701 is lifted by the movement of abutment block 601 until the slot 605 on abutment block 601 is located directly below rod 701, allowing rod 701 to be inserted into slot 605 under its own gravity. Afterwards, as long as rod 701 is not pulled out of slot 605, abutment block 601 cannot rotate, ensuring that locking ring 4 can always press the optical fiber head tightly.

[0039] In a further embodiment of the present invention, the outer sleeve 1 of the rotary cover 3 is provided with an adjusting ring 301, and a retaining ring 303 is fixedly connected to the inner sleeve 301 through a plurality of fixing rods 302. The retaining ring 303 is located above the outer sleeve 1, and the upper and lower surfaces of the retaining ring 303 are respectively abutted and matched with the wedge-shaped retaining block 704, and the top of the inner wall of the rotary cover 3 is fixedly connected with a retaining ring 707 abutting against the wedge-shaped retaining block 704. Specifically, the rotary cover 3 is sleeved on the top of the outer sleeve 1, and the inner wall of the rotary cover 3 contacts the outer wall of the outer sleeve 1. The retaining ring 303 in the adjusting ring 301 is located above the outer sleeve 1. When the rotary cover 3 is screwed downward clockwise, the retaining ring 303 is used to press the wedge-shaped retaining blocks 704, so that the plurality of abutting rods 702 are pressed against the locking ring 4 to ensure that the locking ring 4 is in the center position of the QBH connector, and after the optical fiber head is locked, the wedge-shaped retaining block 704 will be reset and moved back under the action of the reset spring 703, so that the optical fiber head originally pressed into the socket When the screw cap 3 is rotated counterclockwise to move upward, the top surface of the retaining ring 303 and the horizontal surface of the bottom of the wedge-shaped retaining block 704 are pressed together. As the retaining ring 303 moves upward, the insertion rod 701 will gradually be pulled out of the slot 605 of the abutment block 601, so as to prevent the locking ring 4 from immediately loosening the optical fiber head after the screw cap 3 is loosened, thereby ensuring the reliability of the connection between the optical fiber head and the QBH connector and preventing the optical fiber head from accidentally falling off. When the retaining ring 303 drives the wedge-shaped retaining block 704 to move upward, the retaining ring 707 will press it from the top of the wedge-shaped retaining block 704, forcing the wedge-shaped retaining block 704 to retract and avoid the retaining ring 707, allowing the entire insertion rod 701 to move downward again. At this time, due to the change in the position of the abutment block 601, the insertion rod 701 and the abutment block 601 have been staggered, so it will not affect the normal disassembly and assembly of the optical fiber head.

[0040] In a further embodiment of the present invention, an L-shaped groove 304 is provided on the rotary cover 3 for the fixing rod 302 to move, and the height of the adjusting ring 301 is greater than the height of the L-shaped groove 304. Specifically, when the rotary cover 3 is tightened and moved downward, the fixing rod 302 is in the horizontal section of the L-shaped groove 304, and the fixing rod 302 is pressed against the groove wall of the horizontal section, so that the adjusting ring 301 and the retaining ring 303 connected by the fixing rod 302 move synchronously with the rotary cover 3, and then the retaining ring 303 presses the wedge-shaped stop block 704 to achieve the positioning of the locking ring 4. If the optical fiber connector needs to be removed quickly, the fixing rod 302 can be placed in the vertical section of the L-shaped groove 304 by rotating the external adjusting ring 301 of the rotary cover 3, and then the adjusting ring 301 can be lifted to allow the retaining ring 303 to directly lift the wedge-shaped abutment block 704, so that the insertion rod 701 can quickly disengage from the abutment block 601, and then the rotary cover 3 can be turned counterclockwise to loosen the locking ring 4, so that the positioning pin 401 on the locking ring 4 can be moved back into the vertical section of the optical fiber head guide groove, and finally the optical fiber head can be directly pulled out, which can make optical fiber plugging and unplugging faster and more convenient.

[0041] In a further embodiment of the present invention, a circle of anti-skid columns 305 is provided on the outer circumference of the rotary cover 3, and a toothed ring 306 is fixedly connected to the top of the adjusting ring 301. When the fixing rod 302 in the adjusting ring 301 moves upward along the vertical section of the L-shaped groove 304, the toothed ring 306 is engaged with the circle of anti-skid columns 305. Specifically, the toothed ring 306 is located below the circle of anti-skid columns 305. When the optical fiber head needs to be quickly removed, the adjusting ring 301 is rotated to make the adjusting ring 301 in a position where it can be lifted alone. At this time, by lifting the adjusting ring 301, the retaining ring When 303 lifts up the cross bar, the toothed ring 306 also moves toward the direction of the anti-skid column 305. After the cross bar is completely pulled out of the slot 605 on the abutment block 601, the teeth on the toothed ring 306 will also be stuck between two adjacent anti-skid columns 305. If it is necessary to let the locking ring 4 loosen the optical fiber head, after the toothed ring 306 gets stuck on the anti-skid column 305, directly turn the adjusting ring 301 counterclockwise to loosen the rotary cover 3. In this way, in the process of disassembling the optical fiber head, you only need to adjust the adjusting ring 301, which simplifies the operation difficulty and the required steps.

[0042] In a further embodiment of the present invention, a gasket 402 is vertically slidably sleeved on the outside of the locking ring 4, and a plurality of sliding grooves 404 are vertically opened on the inner wall of the gasket 402. A sliding rod 405 sliding in the sliding groove 404 is fixedly connected to the outer wall of the locking ring 4, and a pad 406 is installed at the bottom of the sliding rod 405 below the gasket 402. The outer wall of the gasket 402 contacts the inner wall of the outer sleeve 1, and a friction ring 403 is embedded in the outer wall of the gasket 402. The friction ring 403 and the pressing block 705 are at the same height. Specifically, the gasket 402 can slide up and down outside the locking ring 4. Therefore, even if the gasket 402 is pressed in advance by the pressing blocks 705 on each abutting rod 702, the locking ring 4 will not be unable to continue to move down to complete the locking of the optical fiber head. The coaxiality between the locking ring 4 and the conical platform 5 can be guaranteed in advance before the optical fiber head is locked, thereby avoiding the deviation of the optical fiber head.

[0043] In a further embodiment of the present invention, a connecting seat 8 is installed at the bottom of the outer jacket 1, a water-cooling circulation chamber 801 is provided between the connecting seat 8 and the outer jacket 1, and a pair of connecting valves 803 connected to the water-cooling circulation chamber 801 are installed on the outer jacket 1. Specifically, the pair of connecting valves 803 are respectively connected to the water inlet pipe and the water outlet pipe. When the laser is in use, the cooling of the QBH joint is achieved by circulating the coolant in the water-cooling circulation chamber 801.

[0044] In a further embodiment of the present invention, a plurality of connecting bolts 802 are installed through the connecting seat 8, and the connecting seat 8 is connected to the outer sleeve 1 and the conical platform 5 in sequence through the connecting bolts 802, and a sealing ring 101 is installed between the outer sleeve 1, the rotary cover 3 and the conical platform 5. Specifically, the outer sleeve 1 and the conical platform 5 are not integrally formed, which is convenient for the later replacement of the conical platform 5 and avoids the difficulty of disassembly and assembly after the tapered hole on the conical platform 5 is worn. At the same time, the multiple sealing rings 101 installed can ensure the overall sealing performance of the QBH joint.

[0045] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fiber laser internal expansion QBH joint, comprising an outer sleeve (1) and an inner sleeve (2), characterized in that: Also includes: A screw cap (3) is threadedly connected to the inner sleeve (2), and a locking ring (4) is sleeved between the screw cap (3) and the inner sleeve (2). A plurality of positioning pins (401) are inserted into the inner wall of the locking ring (4), and a waist hole (201) is provided on the inner sleeve (2) for the positioning pins (401) to move. A conical platform (5) is fixed in the outer sleeve (1), and the central conical hole of the conical platform (5) and the inner sleeve (2) are on the same axis. The outer edge of the top surface of the conical platform (5) is movably connected to a plurality of elastic abutments (6) distributed in an annular manner. The top of the elastic abutment (6) is inclined against the locking ring (4), and a bidirectional limiting mechanism (7) matching the elastic abutment (6) is inserted into the inner wall of the outer sleeve (1); The elastic abutment (6) comprises an abutment block (601), a connecting rod (602) is slidably inserted at the bottom of the abutment block (601), one end of the connecting rod (602) is fixedly connected to a plug plate (603), an arc groove (501) matching the plug plate (603) is provided on the outer edge of the top surface of the conical platform (5), a top spring (604) is fixedly connected between the plug plate (603) and the abutment block (601), a limiting inclined groove (203) abutting against one end of the abutment block (601) is provided at the bottom of the inner sleeve (2), a slot (605) for inserting a bidirectional limiting mechanism (7) is provided at the other end of the abutment block (601), and the abutment block (601) is provided with abutment inclined surfaces (606) on both sides of the slot (605); The bidirectional limiting mechanism (7) comprises an insertion rod (701) vertically movably inserted into the top of the outer sleeve (1); an abutment rod (702) is installed on the top of the insertion rod (701) and penetrates horizontally above the outer sleeve (1); a return spring (703) is installed between the abutment rod (702) and the insertion rod (701); one end of the abutment rod (702) is fixedly connected to a wedge-shaped abutment block (704); the other end of the abutment rod (702) is fixedly connected to a pressing abutment block (705) that abuts against a locking ring (4); the bottom of the insertion rod (701) is plugged into the slot (605); The outer sleeve of the rotary cover (3) is provided with an adjusting ring (301), a retaining ring (303) is fixedly connected to the inner sleeve of the adjusting ring (301) via a plurality of fixing rods (302), the retaining ring (303) is located above the outer sleeve (1), the upper and lower surfaces of the retaining ring (303) are respectively in contact with the wedge-shaped retaining block (704), the rotary cover (3) is provided with an L-shaped groove (304) for the fixing rod (302) to move, and the height of the adjusting ring (301) is greater than the height of the L-shaped groove (304); When the rotary cover (3) is rotated to move the positioning pin (401) in the locking ring (4) along the waist hole (201) to the locking position, the locking ring (4) presses down to push the elastic resisting member (6), and at the same time, the rotary cover (3) pushes the bidirectional limiting mechanism (7) toward the locking ring (4) until the bidirectional limiting mechanism (7) limits the elastic resisting member (6).

2. The fiber laser internal expansion QBH joint according to claim 1, characterized in that: A guide pin (202) is inserted into the inner sleeve (2), and the guide pin (202) is located above one of the waist holes (201).

3. The fiber laser internal expansion QBH joint according to claim 1, characterized in that: The outer peripheral surface of the rotary cover (3) is provided with a circle of anti-skid columns (305), and the top of the adjustment ring (301) is fixedly connected with a toothed ring (306). When the fixed rod (302) in the adjustment ring (301) moves upward along the vertical section of the L-shaped groove (304), the toothed ring (306) is engaged with the circle of anti-skid columns (305).

4. The optical fiber laser internal expansion QBH joint according to claim 1, characterized in that: A backing ring (402) is vertically slidably sleeved outside the locking ring (4), the outer wall of the backing ring (402) is in contact with the inner wall of the outer sleeve (1), and a friction ring (403) is embedded in the outer wall of the backing ring (402), and the friction ring (403) and the pressing block (705) are at the same height.

5. The optical fiber laser internal expansion QBH joint according to claim 1, characterized in that: A connecting seat (8) is plugged and installed at the bottom of the outer jacket (1), and a water-cooling circulation chamber (801) is provided between the connecting seat (8) and the outer jacket (1).

6. The optical fiber laser internal expansion QBH joint according to claim 5, characterized in that: A plurality of connecting bolts (802) are installed through the connecting seat (8), and the connecting seat (8) is connected to the outer sleeve (1) and the conical platform (5) in sequence through the connecting bolts (802), and sealing rings (101) are installed between the outer sleeve (1), the rotary cover (3) and the conical platform (5).

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