A coupling screwing machine with high-precision torque

Abstract

The utility model relates to the technical field of screwing machine, concretely to a coupling screwing machine with high-precision torque, including base, the base top is connected with main vice through bolt fastening, the left end of main vice is equipped with servo motor, the inside fixed of base has back vice floating pneumatic cylinder, the right end fixed of back vice floating pneumatic cylinder has back vice, the inside of back vice and main vice all is equipped with a plurality of pincer teeth, every pincer teeth outside is closely combined with positioning frame, every positioning frame inside is hinged with gyro wheel, every end gyro wheel outside is closely combined with curve disc, the left end curve disc outside is fixed with toothed disc, back vice rear end is equipped with back vice clamping pneumatic cylinder, the utility model discloses through servo motor work can drive main gear rotation to drive amplification gear rotation to drive toothed disc rotation to drive left end curve disc rotation to conveniently rotate coupling to guarantee screwing effect, improve screwing efficiency simultaneously.

Description

Technical Field

[0001] This utility model belongs to the field of screw fastener technology, specifically a coupling screw fastener with high precision torque. Background Technology

[0002] As the oil industry advances into deeper and more complex geological formations, the connection quality of tubing, rods, packers, and couplings in oil tubing, casing, and downhole tool operations directly impacts the sealing, safety, and operational efficiency of oil and gas extraction. These components come in various specifications, and connections must meet stringent torque precision and sealing performance requirements. Furthermore, the scenarios of mass production in tubing plants and efficient switching between downhole operations place dual demands on the power output, response speed, and adaptability of threading equipment. Simultaneously, the upgrading of automation and the strengthening of safety standards in the oil industry are driving the transformation of threading equipment from traditional single-drive to multi-drive systems to adapt to the demands of high-intensity, multi-specification, and fast-paced connection operations.

[0003] Existing coupling tightening machines typically employ multiple bearings on the outside of the cam disc for easy rotation. This method involves mounting multiple pins on the main jaw plate to position the bearings. However, due to workpiece machining precision limitations, the pins on each bearing are not aligned on the same circumference, resulting in varying forces on each bearing. Furthermore, the weight of the cam disc and the coupling to be tightened places constant pressure on the bottom bearing, making it prone to damage and consequently reducing the overall lifespan of the tightening machine. In addition, existing tightening machines mostly rely on hydraulic rods for clamping. Since each hydraulic rod operates independently, the pressure applied to each jaw varies, leading to poor clamping performance. To address these issues, this invention designs a coupling tightening machine with high-precision torque. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides a coupling tightening machine with high precision torque, which effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a coupling tightening machine with high precision torque, comprising a base, a main clamp fastened to the top of the base by bolts, a guide rod auxiliary connecting plate at the right end of the main clamp, a gear box fixed to the bottom of the main clamp, a servo motor fixedly connected to the right end of the gear box, a back clamp floating cylinder fixed inside the base, a back clamp fixed to the right end of the back clamp floating cylinder, a back clamp jaw plate rotatably connected to the outside of the back clamp via a back clamp jaw plate positioning ring, and both the back clamp and the main clamp having internal components... The device comprises several jaws, each with a positioning frame tightly fitted to its outer side. Two adjacent jaws at the same end are fitted with a spacer guide block. Each positioning frame has a roller hinged inside. A curved disc is tightly fitted to the outside of each roller at each end. A toothed disc is fixed to the outside of the curved disc at the left end. A back clamping cylinder is provided at the rear end of the back clamp. A beam probe is provided on the inner side of both the front and rear ends of the main clamp. A brake disc is fixed on the left side of the main clamp. Friction band moving rods are provided at the front and rear ends of the brake disc. A tension sensor is provided at the bottom of the back clamp.

[0006] Preferably, the base has two slide rails fixed to the top, each slide rail has a slider slidably connected to its exterior, the two sliders have a back clamp support fixed to their tops, the back clamp support is fixedly connected to the back clamp on its top, the right end of the main clamp has a jaw plate position detection disc fixed to its right end, the left end of the brake disc has a conveyor belt, the bottom of the conveyor belt is fastened to a support frame by bolts, and the support frame is fixedly connected to the base through the conveyor frame.

[0007] Preferably, a main gear is fixed to the right end of the servo motor shaft, and positioning bearings are fixed to both ends of the main gear. The outer ring of each positioning bearing is fixedly connected to the gear box. An amplifying gear is meshed with the top of the main gear, and the amplifying gear meshes with the gear box on its top.

[0008] Preferably, a friction brake band is slidably connected to the outside of the brake disc, and friction band hinge blocks are fixed at both ends of the friction brake band. The friction band hinge blocks are hinged to the friction band moving rods, and a friction band positioning rod is hinged to the bottom of each friction band moving rod. Each friction band positioning rod is fixedly connected to the outer ring of the outer full roller bearing through a flange.

[0009] Preferably, the left end of the friction brake band is provided with a tension band that is slidably connected to the brake disc, the top of the rear end of the tension band is fixed with a tension spring by a positioning buckle, the bottom of the tension spring is fixed with a tension bolt, and the lower end of the tension bolt is fastened to the lower end of the tension band by a positioning nut.

[0010] Preferably, the back clamping cylinder is hinged to the back clamp support via a back clamping cylinder positioning block. A hinge ring is fixed to the top of the back clamping cylinder, and back clamp rotating arms are hinged to the left and right ends of the hinge ring. A connecting block is fixed to the inner side of each back clamp rotating arm. A guide key is snapped onto the outside of each spacer guide block. Each connecting block is hinged to the guide key on its inner side via a connecting block positioning rod. The through-beam probe is fixedly connected to the main clamp via an through-beam probe bracket, and a probe is fixed to the right end of the main clamp.

[0011] Preferably, the main jaws are provided at both ends of the main jaws, and the main jaws are fastened to the positioning frame inside them by bolts. The left end of the curved disc is fastened to the outer ring of the inner full roller bearing by the left end curved disc positioning block. The right end of the curved disc is fixedly connected to the back jaws outside it. The inner full roller bearing is fixed to the outside of the main jaws, and the outer ring of the inner full roller bearing is fixed to the outside of the outer ring of the inner full roller bearing. The outer ring of the outer full roller bearing is fixedly connected to the main jaws.

[0012] Preferably, each jaw body has jaws internally engaged, and each jaw body is fastened to its outer positioning frame by positioning bolts. Each positioning frame has inner positioning pins fixed at both ends, and each inner positioning pin has an outer positioning pin. The two sets of outer positioning pins on the left end are fastened to the main jaw plate, and the two sets of outer positioning pins on the right end are fastened to the back jaw plate. A return spring is fixed between each set of inner and outer positioning pins, and a photoelectric sensor is fixed at the right end of the back jaw.

[0013] Preferably, a plurality of detection plate hinge blocks are fixed on the left side of the jaw plate position detection plate, and a detection plate hinge rod is fixed on the left side of each detection plate hinge block. Each detection plate hinge rod is fixedly connected to the inner positioning pin at its left end. A plurality of auxiliary connecting plate positioning shafts are also fixed on the right end of the jaw plate position detection plate. Each auxiliary connecting plate positioning shaft is provided with an auxiliary connecting plate positioning shaft spring on its outside. The plurality of auxiliary connecting plate positioning shafts are fastened to the guide rod auxiliary connecting plate at its right end by bolts.

[0014] Preferably, one end of the tension sensor is hinged to the slider via a tension sensor hinge block, and the other end of the tension sensor is hinged to a back clamp tension plate. The back clamp tension plate is hinged to the back clamp support on its left side via two pins. Each of the spacer guide blocks on the left end is fastened to the main clamp jaw plate via a set of connecting screws. Each of the spacer guide blocks on the right end is fastened to the back clamp jaw plate via a set of connecting screws on the right end. The back clamp rotation arm is fastened to the back clamp jaw plate via several connecting screws on the right end.

[0015] Compared with the prior art, the beneficial effects of this utility model are: (1) This utility model can drive the main gear to rotate through the operation of the servo motor, thereby driving the amplification gear to rotate, thereby driving the gear plate to rotate, thereby driving the left end curve plate to rotate, thus facilitating the rotation of the coupling, thus ensuring the tightening effect and improving the tightening efficiency. At the same time, when the brake disc brakes, the left end curve plate can rotate to make the left end roller rotate along the left end curve plate, thereby driving the left end jaws to move radially along the main jaw, thereby changing the circumferential diameter formed by several jaws, thus adapting to couplings with different outer diameters, thereby increasing the application range of the entire tightening machine, thus ensuring the stability of the coupling. The inner ring full roller bearing and the outer ring full roller bearing are integrated bearings, thus ensuring the stability of the curve plate when rotating. At the same time, due to the function of the integrated bearing, it can ensure that the internal rollers always rotate around the main jaw axis, thus ensuring that the force on each roller always remains the same, thus ensuring that the wear of each roller is the same, thus ensuring the tightening effect, thus improving the service life of the entire tightening machine. This tightening machine adopts a roller climbing clamping method.

[0016] (2) This utility model uses the main clamp to position the outer ring full roller bearing, the back clamp floating cylinder is telescopic, which can drive the back clamp to move, thus adapting to different lengths of couplings, thereby improving the application range of the entire tightening machine, the friction belt moving rod is telescopic, thus locking the brake disc, thus preventing the left end main clamp jaw plate from rotating, thus ensuring the clamping effect of the left end clamp teeth.

[0017] (3) In this utility model, the clamping jaws are positioned by the clamping jaws, the curved disc provides a moving path for the rollers, and the back clamping cylinder is retractable, which can drive the hinge ring to rise and fall, thereby driving the back clamping arm to rotate around the back clamp at a certain angle, thereby driving the right end curved disc to rotate, thereby driving the right end roller to move along the right end curved disc, thereby driving the right end clamping jaws to move radially along the back clamp, thus facilitating clamping of the coupling and ensuring stability during tightening.

[0018] (4) This utility model monitors the tension between the tension sensor hinge block and the back clamp tension plate by a tension sensor, and can determine the torque on the back clamp support, thereby determining the torque on the back clamp, and thus determining the torque between the two couplings, thereby changing the pressure of the hydraulic oil input to the servo motor, thereby changing the torque of the main gear, thereby ensuring the accuracy of the torque, thereby preventing damage to the couplings, and adapting to couplings of different qualities, thereby improving the application range of the entire buckling machine. At the same time, the shape of the back clamp tension plate can ensure the uniformity of the force.

[0019] (5) The detection plate hinge rod and the detection plate hinge block cooperate to position the jaw plate position detection plate, thereby supporting the coupling while ensuring the stability of the coupling. The auxiliary connecting plate positioning shaft spring is elastic, thereby ensuring the stability between the guide rod auxiliary connecting plate and the jaw plate position detection plate while facilitating the insertion of the coupling. Attached Figure Description

[0020] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0021] In the attached diagram: Figure 1 This is a schematic diagram of the overall design of this utility model; Figure 2 This is a schematic diagram of the overall back of the present invention; Figure 3 This is a schematic diagram of the right end of the back clamp of this utility model; Figure 4 This is a schematic diagram of the internal structure of the back clamp jaw plate of this utility model; Figure 5 This is a schematic diagram of the internal structure of the back clamp of this utility model; Figure 6 This is a cross-sectional view of the back clamp of this utility model; Figure 7 This is a schematic diagram of the internal structure of the rotating lever arm of the back clamp of this utility model; Figure 8 This is a schematic diagram of the internal structure of the connecting block of this utility model; Figure 9 This is a schematic diagram of the right end of the main clamp of this utility model; Figure 10 This is a schematic diagram of the left end of the main clamp of this utility model; Figure 11 This is a schematic diagram of the inner side of the through-beam probe bracket of this utility model; Figure 12 This is a schematic diagram of the internal structure of the main clamp of this utility model; Figure 13 This is a cross-sectional view of the main clamp of this utility model; Figure 14 This is a schematic diagram of the top of the main gear of this utility model; Figure 15 This is a schematic diagram of the tension sensor of this utility model; Figure 16 This is a schematic cross-sectional view of the present invention; Figure 17 This is a schematic diagram of the outer end of the hinge rod of the detection disc of this utility model. Figure 18 This is a cross-sectional schematic diagram of the jaw plate position detection disc of this utility model.

[0022] In the diagram: 1-Base; 2-Main jaw; 3-Back jaw; 4-Servo motor; 5-Back jaw rotating arm; 6-Jaw jaws; 7-Guide rod auxiliary connecting plate; 8-Thrust probe bracket; 9-Tension sensor; 101-Slide rail; 102-Slider; 103-Back jaw floating cylinder; 104-Conveyor belt; 105-Conveyor frame; 106-Support frame; 201-Outer ring full roller bearing; 202-Inner ring full roller bearing; 203-Main jaw Plate; 204-Brake disc; 205-Left end curve disc positioning block; 301-Back clamp jaw plate; 302-Photoelectric sensor probe; 303-Back clamp jaw plate positioning ring; 304-Back clamp support; 401-Gear box; 402-Positioning bearing; 403-Main gear; 404-Amplifying gear; 405-Gear disc; 501-Hinge ring; 502-Back clamp clamping cylinder; 503-Connecting block; 504-Guide key; 505-Connecting plate 506-Leg clamping cylinder positioning block; 601-Pliers teeth; 602-Inner positioning pin; 603-Outer positioning pin; 604-Return spring; 605-Positioning frame; 606-Curved disc; 607-Spacer guide block; 608-Connecting screw; 609-Positioning bolt; 610-Roller; 701-Jaw plate position detection disc; 702-Auxiliary connecting plate positioning shaft; 703-Auxiliary connecting plate positioning shaft spring; 7 04-Detection disc hinge block; 705-Detection disc hinge rod; 801-Probe; 802-Through-beam probe; 803-Friction belt positioning rod; 804-Friction belt moving rod; 805-Friction belt hinge block; 806-Tension bolt; 807-Tension spring; 808-Tension belt; 809-Friction brake belt; 810-Positioning buckle; 811-Positioning nut; 901-Tension sensor hinge block; 902-Back clamp tension plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] Example 1, by Figures 1-3 , Figure 7 , Figure 9 , Figure 13 , Figures 15-16The present invention includes a base 1 for supporting the entire device. A main clamp 2 is bolted to the top of the base 1 for positioning the outer ring full roller bearing 201. A guide rod auxiliary connecting plate 7 is provided at the right end of the main clamp 2 for assisting in unscrewing the coupling. A gear box 401 is fixed to the bottom of the main clamp 2 for positioning the main gear 403. A servo motor 4 is fixed to the right end of the gear box 401, which drives the main gear 403 to rotate. A back clamp floating cylinder 103 is fixed inside the base 1. The back clamp floating cylinder 103 is telescopic, thereby driving the back clamp 3 to move, thus adapting to different lengths of couplings. The clamps are designed to improve the overall usability of the fastening machine. A back clamp 3 is fixed to the right end of the back clamp floating cylinder 103. The back clamp 3 is used to position the back clamp jaw plate 301. The back clamp 3 is rotatably connected to the back clamp jaw plate 301 via a back clamp jaw plate positioning ring 303. The back clamp jaw plate 301 is used to position the curved disc 606 inside it. Both the back clamp 3 and the main clamp 2 have several jaw teeth 6 inside. The number of jaw teeth 6 varies according to requirements, but there are at least three jaw teeth 6. The jaw teeth 6 are used to position the jaw teeth 601. A positioning frame 605 is tightly fitted to the outside of each jaw tooth 6. The positioning frame 605 is used to position the jaw tooth 6. Two adjacent jaw teeth 6 at the same end are tightly fitted together. A spacer guide block 607 is provided to guide the positioning frame 605. Each positioning frame 605 has a roller 610 hinged inside, facilitating rotation. A curved disc 606 is tightly fitted to the outside of each roller 610. The inner wall of the curved disc 606 has an arc-shaped structure, and the curved disc 606 is symmetrical, facilitating synchronous operation of multiple rollers 610. The curved disc 606 provides a movement path for the rollers 610. A gear disc 405 is fixed to the outside of the left-end curved disc 606, and its rotation can drive the left-end curved disc 606 to rotate. A back clamping cylinder 502 is provided at the rear end of the back clamp 3. The 02 is retractable, which allows the hinge ring 501 to rise and fall, thereby causing the back clamp rotation arm 5 to rotate around the back clamp 3 at a certain angle. This causes the right-end curved disk 606 to rotate, thereby causing the right-end roller 610 to move along the right-end curved disk 606, and thus causing the right-end jaw body 6 to move radially along the back clamp 3, facilitating clamping of the coupling. Both the front and rear inner sides of the main clamp 2 are equipped with through-beam probes 802. The two through-beam probes 802 work together to monitor whether the coupling is installed correctly, thus ensuring tightening accuracy. A brake disc 204 is fixed on the left side of the main clamp 2. The brake disc 204 is used to position the main clamp jaw plate 203. Friction band moving rods 804 are provided at both the front and rear ends of the brake disc 204.The friction band moving rod 804 is telescopic, thereby locking the brake disc 204 and preventing the left-end main jaw plate 203 from rotating, thus ensuring the clamping effect of the left-end jaw body 6. A tension sensor 9 is provided at the bottom of the back clamp 3. The tension sensor 9 monitors the tension between the tension sensor hinge block 901 and the back clamp tension plate 902, thereby determining the torque on the back clamp support 304, and thus the torque on the back clamp 3. This allows for the determination of the torque between the two couplings, and by changing the pressure of the hydraulic oil input to the servo motor 4, the torque of the main gear 403 is changed, ensuring torque accuracy and preventing damage to the couplings.

[0025] Example 2, based on Example 1, combined with... Figures 17-18 The base 1 has two slide rails 101 fixed to its top, providing a movement path for the sliders 102. Each slide rail 101 has a slider 102 slidably connected to its exterior. The sliders 102 are used to position the back clamps 3. The two sliders 102 are fixedly connected to the back clamps 3 on their tops. The right end of the main clamp 2 has a jaw plate position detection disc 701 fixed. Several detection disc hinge blocks 704 are fixed to the left side of the jaw plate position detection disc 701. The left end of the brake disc 204 has a conveyor belt 104 for convenient conveying of couplings. A support frame 106 is bolted to the bottom of the conveyor belt 104, positioning the conveyor belt 104. The support frame 106 is fixedly connected to the base 1 via a conveyor frame 105. The hinge blocks 704 connect the detection disc hinge rods 705 and the jaw plate position detection discs 701. Each detection disc hinge... A detection plate hinge rod 705 is fixed on the left side of block 704. The detection plate hinge rod 705 and the detection plate hinge block 704 cooperate to position the jaw plate position detection plate 701, thereby supporting the coupling and ensuring the stability of the coupling. Each detection plate hinge rod 705 is fixedly connected to the inner positioning pin 602 on its left end. Several auxiliary connecting plate positioning shafts 702 are also fixed on the right end of the jaw plate position detection plate 701. The auxiliary connecting plate positioning shafts 702 are used to position the jaw plate position detection plate 701 and the guide rod auxiliary connecting plate 7. Each auxiliary connecting plate positioning shaft 702 is provided with an auxiliary connecting plate positioning shaft spring 703 on its outside. The auxiliary connecting plate positioning shaft spring 703 is elastic, thereby ensuring the stability between the guide rod auxiliary connecting plate 7 and the jaw plate position detection plate 701 and facilitating the insertion of the coupling. Several auxiliary connecting plate positioning shafts 702 are fastened to the guide rod auxiliary connecting plate 7 on their right end by bolts. When using this device, the operator connects the entire device to the external control system and connects the air tank and hydraulic oil tank to the top mechanism of the base 1. At this time, the extension and retraction of the back clamp floating cylinder 103 can drive the slider 102 to move along the slide rail 101, thereby moving the back clamp 3 to adapt to couplings of different lengths. When it is necessary to insert a coupling into the main clamp 2, the operator inserts the auxiliary coupling into the main clamp 2. At this time, the conveyor belt 104 facilitates the transport of the auxiliary coupling. The guide rod auxiliary connecting plate 7 and the jaw plate position detection plate 701 ensure the stability of the coupling insertion. At the same time, the auxiliary connecting plate positioning shaft spring 703 and the auxiliary connecting plate positioning shaft allow the guide rod auxiliary connecting plate 7 to move, thereby facilitating the installation of the auxiliary coupling.

[0026] Example 3, based on Example 1, combined with Figures 10-12 , Figure 14As shown, a main gear 403 is fixed to the right end of the shaft of the servo motor 4. The main gear 403 can drive the amplifying gear 404 to rotate, thereby driving the gear disk 405 to rotate, which in turn drives the left-end curved disk 606 to rotate, thereby driving the left-end jaw body 6 to move radially along the main jaw 2, so that the left-end jaw body 6 clamps the coupling. Positioning bearings 402 are fixed to both ends of the main gear 403. The positioning bearings 402 are used to position the main gear 403. The outer ring of each positioning bearing 402... The main gear 403 is fixedly connected to the gearbox 401. An amplifying gear 404 meshes with the top of the main gear 403, and the amplifying gear 404 meshes with the gearbox 405 on its top. A friction brake band 809 is slidably connected to the outside of the brake disc 204. A rubber layer is adhered to the inner surface of the friction brake band 809 to ensure braking effect, thereby ensuring the locking effect of the main jaw plate 203 and the locking effect of the left-end jaw body 6. Friction band hinge blocks 805 are fixed at both ends of the friction brake band 809. The friction band hinge block 805 is used to connect the friction brake band 809 and the friction band moving rod 804. The friction band hinge block 805 is hinged to the friction band moving rod 804. Each friction band moving rod 804 has a friction band positioning rod 803 hinged to its bottom. The friction band positioning rod 803 is used to position the friction band moving rod 804. Each friction band positioning rod 803 is fixedly connected to the outer ring of the outer full roller bearing 201 through a flange. The left end of the friction brake band 809 is provided with a tension band 808. The brake disc 204 is slidably connected. The tension band 808 is used to position the friction brake band 809. A tension spring 807 is fixed to the top rear end of the tension band 808 by a positioning buckle 810. The tension spring 807 is elastic. A tension bolt 806 is fixed to the bottom of the tension spring 807. The tension bolt 806 and the tension spring 807 cooperate to facilitate the tension band 808 in positioning the friction brake band 809. The lower end of the tension bolt 806 is fastened to the lower end of the tension band 808 by a positioning nut 811. Furthermore, the worker inserts the auxiliary coupling into the main clamp 2. The conveyor belt 104 facilitates the transport of the auxiliary coupling. When the auxiliary coupling is inserted into the main clamp 2, its position can be monitored by the through-beam probe 802, ensuring the accuracy of the coupling's tightening. Further, the two friction band moving rods 804 extend, causing the friction brake band 809 to clamp the brake disc 204, preventing the brake disc 204 from rotating. At this time, the tension bolt 806 and the tension spring 807 ensure that the tension band 808 is in close contact with the brake disc 204, guaranteeing the stability of the friction brake band 809 and thus ensuring braking effectiveness. At this time, the servo motor 4 operates, driving the main gear 403 to rotate, which in turn drives the amplifying gear 404 to rotate, which in turn drives the gear disc 405 to rotate, thereby driving the left end of the... When the curved disc 606 rotates, the brake disc 204 locks, which in turn locks the left-end spacer guide block 607, thereby locking the left-end jaw body 6. The rotation of the left-end curved disc 606 allows the left-end roller 610 to move along it, causing the left-end positioning frame 605 to move radially along the main clamp 2. This allows the left-end jaws 601 to clamp the auxiliary coupling. When tightening is required, the servo motor 4 continues to operate, driving the gear disc 405 to continue rotating. When the torque of the curved disc 606 exceeds the resistance of the friction brake band 809, the brake disc 204 rotates accordingly, causing the positioning frame 605 to rotate synchronously with the curved disc 606. This allows the jaw body 6 to rotate around the axis of the main clamp 2, thus rotating the auxiliary coupling and facilitating tightening.

[0027] Example 4, based on Example 1, combined with... Figures 4-6 , Figure 8The back clamping cylinder 502 is hinged to the back clamp support 304 via a back clamping cylinder positioning block 506. A hinge ring 501 is fixed to the top of the back clamping cylinder 502. Back clamping rotating arms 5 are hinged to the left and right ends of the hinge ring 501. A connecting block 503 is fixed to the inner side of each back clamping rotating arm 5. A guide key 504 is snapped onto the outside of each spacer guide block 607. The guide key 504 is used to position the spacer guide block 607. Each connecting block 503 is hinged to its inner guide key 504 via a connecting block positioning rod 505. The movement of the back clamping rotating arm 5 can move the connecting block 503 on its inner side, thereby causing the guide key 504 on its inner side to move around the back clamp support 304. The clamp 3 rotates, causing the roller 610 to move around the curved disk 606, thereby driving the right-end clamp jaw 6 to move radially along the clamp jaw 6. The through-beam probe 802 is fixedly connected to the main clamp 2 via the through-beam probe bracket 8. A probe 801 is fixed to the right end of the main clamp 2. The probe 801 is used to monitor whether the coupling passes through the back clamp 3. The main clamp 2 has main clamp jaw plates 203 at both ends. The main clamp jaw plates 203 are used to position the left-end curved disk 606. The main clamp jaw plates 203 are fastened to the positioning frame 605 inside them by bolts. The left-end curved disk 606 is fastened to the outer ring of the inner ring full roller bearing 202 via the left-end curved disk positioning block 205. The right-end curved disk 606... The main jaw plate 203 is fixedly connected to the back clamp 3 externally. An inner full-roll bearing 202 is fixed to the outside of the main jaw plate 203. An outer full-roll bearing 201 is fixed to the outside of the outer ring of the inner full-roll bearing 202. The inner full-roll bearing 202 and the outer full-roll bearing 201 are integral bearings, ensuring the stability of the curve plate 606 during rotation, thus guaranteeing the tightening effect and improving the service life of the entire tightening machine. The outer ring of the outer full-roll bearing 201 is fixedly connected to the main jaw 2. Each jaw body 6 has a jaw 601 inside, used to clamp the coupling. Each jaw body 6 is fastened to the positioning frame 605 on its outer side by a positioning bolt 609. The positioning bolt 609 is used to... For positioning the jaw body 6 and the positioning frame 605, each positioning frame 605 has an inner positioning pin 602 fixed at both ends, and an outer positioning pin 603 is provided on the outer side of each inner positioning pin 602. The two sets of outer positioning pins 603 on the left end are fastened to the main jaw plate 203, and the two sets of outer positioning pins 603 on the right end are fastened to the back jaw plate 301. A return spring 604 is fixed between each set of inner positioning pins 602 and outer positioning pins 603. The return spring 604 is elastic, thereby ensuring the stability of the positioning frame 605 and the jaw body 6. A photoelectric sensor 302 is fixed to the right end of the back jaw 3. The photoelectric sensor 302 is used to sense the position of the coupling inside the back jaw 3.One end of the tension sensor 9 is hinged to the slider 102 via a tension sensor hinge block 901, and the other end of the tension sensor 9 is hinged to a back clamp tension plate 902. The back clamp tension plate 902 adopts a triangular ring structure to ensure uniform force distribution. The back clamp tension plate 902 facilitates the measurement of the torque on the back clamp 3. The back clamp tension plate 902 is hinged to the back clamp support 304 on its left side via two pins. Each of the left-end spacer guide blocks 607 is fastened to the main clamp jaw plate 203 via a set of connecting screws 608. Each of the right-end spacer guide blocks 607 is fastened to the back clamp jaw plate 301 via a set of connecting screws 608 on the right end. The back clamp rotation arm 5 is fastened to the back clamp jaw plate 301 via several connecting screws 608 on the right end. Furthermore, the worker inserts the main coupling into the back clamp 3. At this time, the clamping cylinder 502 of the back clamp extends, thereby driving the rotating arm 5 of the back clamp to rise, thereby driving the connecting block 503 to rotate around the back clamp 3, thereby driving the guide key 504 to rotate around the back clamp 3, thereby driving the right-end spacer guide block 607 to rotate around the back clamp 3, thereby driving the right-end roller 610 to move along the right-end positioning frame 605, thereby causing the right-end positioning frame 605 to move radially inward along the back clamp 3, thereby causing the right-end jaw body 6 to move inward, thereby causing the right-end jaw 601 to clamp the main coupling. During tightening, while the main gear 403 rotates, the back clamp floating cylinder 103 retracts, thereby causing the back clamp 3 to move to the left, thus ensuring the tightening effect.

[0028] The working process of this utility model is as follows: When using this device, the operator connects the entire device to the external control system and connects the air tank and hydraulic oil tank to the top mechanism of the base 1. At this time, the extension and retraction of the back clamp floating cylinder 103 can drive the slider 102 to move along the slide rail 101, thereby moving the back clamp 3 to adapt to couplings of different lengths. Further, the operator inserts the main coupling into the back clamp 3. At this time, the back clamp clamping cylinder 502 extends, thereby driving the back clamp rotating arm 5 to rise, thereby driving the connecting block 503 to rotate around the back clamp 3, thereby driving the guide key 504 to rotate around the back clamp 3, thereby driving the right-end spacer guide block 607 to rotate around the back clamp 3, thereby moving the back clamp 3. The right-end roller 610 moves along the right-end positioning frame 605, causing the right-end positioning frame 605 to move radially inward along the back clamp 3, thereby causing the right-end jaw body 6 to move inward, and thus causing the right-end jaw 601 to clamp the main clamp. At this time, the worker inserts the auxiliary clamp into the main clamp 2. The conveyor belt 104 facilitates the transport of the auxiliary clamp. The guide rod auxiliary connecting plate 7 and the jaw plate position detection disc 701 ensure the stability of the clamp insertion. At the same time, the auxiliary connecting plate positioning shaft spring 703 and the auxiliary connecting plate positioning shaft allow the guide rod auxiliary connecting plate 7 to move, thus facilitating the installation of the auxiliary clamp. When the auxiliary clamp is inserted into the main clamp 2, it can be moved through the... The through-beam probe 802 monitors the position of the auxiliary coupling. Further, the two friction band moving rods 804 extend, thereby causing the friction brake band 809 to clamp the brake disc 204, preventing the brake disc 204 from rotating. At this time, due to the action of the tension bolt 806 and the tension spring 807, the tension band 808 is tightly attached to the brake disc 204, ensuring the stability of the friction brake band 809 and thus ensuring the braking effect. At this time, the servo motor 4 operates, thereby driving the main gear 403 to rotate, which in turn drives the amplifying gear 404 to rotate, which in turn drives the gear disc 405 to rotate, which in turn drives the left-end curved disc 606 to rotate. At this time, because the brake disc 204 is locked, the left-end interval... Guide block 607 locks, thereby locking the left-end jaw body 6. At this time, the rotation of the left-end curved disk 606 causes the left-end roller 610 to move along the left-end curved disk 606, thereby causing the left-end positioning frame 605 to move radially along the main jaw 2, so that the left-end jaw 601 clamps the auxiliary coupling. When tightening is required, the servo motor 4 continues to work, thereby driving the gear disk 405 to continue rotating. When the torque of the curved disk 606 is greater than the resistance of the friction brake band 809, the brake disc 204 can rotate accordingly, thereby driving the positioning frame 605 to rotate synchronously with the curved disk 606, so that the jaw body 6 can rotate around the axis of the main jaw 2, thereby causing the auxiliary coupling to rotate.During tightening, as the main gear 403 rotates, the back clamp floating cylinder 103 retracts, causing the back clamp 3 to move to the left, thus ensuring the tightening effect.

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

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

Claims

1. A coupling tightening machine with high-precision torque, characterized in that: The system includes a base (1), a main clamp (2) which is fastened to the top of the base (1) by bolts. The right end of the main clamp (2) is provided with a guide rod auxiliary connecting plate (7). The bottom of the main clamp (2) is fixed with a gear box (401). The right end of the gear box (401) is fixedly connected with a servo motor (4). The back clamp floating cylinder (103) is fixed inside the base (1). The right end of the back clamp floating cylinder (103) is fixed with a back clamp (3). The back clamp (3) is rotatably connected to the back clamp jaw plate (301) through a back clamp jaw plate positioning ring (303). Both the back clamp (3) and the main clamp (2) are provided with several jaw teeth (6). Each jaw tooth (6) is tightly fitted with a positioning frame on its outer side. (605), two adjacent jaw bodies (6) at the same end are closely fitted with a spacer guide block (607), each positioning frame (605) is hinged with a roller (610), and a curved disc (606) is closely fitted to the outside of each roller (610). A toothed disc (405) is fixed to the outside of the curved disc (606) at the left end. A back clamping cylinder (502) is provided at the rear end of the back clamp (3). A beam probe (802) is provided on the inner side of both the front and rear ends of the main clamp (2). A brake disc (204) is fixed on the left side of the main clamp (2). Friction belt moving rods (804) are provided at both the front and rear ends of the brake disc (204). A tension sensor (9) is provided at the bottom of the back clamp (3).

2. The coupling tightening machine with high-precision torque according to claim 1, characterized in that: The base (1) has two slide rails (101) fixed on top. Each slide rail (101) is slidably connected to a slider (102). The two sliders (102) are fixed with a back clamp support (304) on top. The back clamp support (304) is fixedly connected to the back clamp (3) on top. The right end of the main clamp (2) is fixed with a jaw plate position detection disc (701). The left end of the brake disc (204) is provided with a conveyor belt (104). The bottom of the conveyor belt (104) is fastened with a support frame (106) by bolts. The support frame (106) is fixedly connected to the base (1) through a conveyor frame (105).

3. A coupling tightening machine with high-precision torque according to claim 2, characterized in that: The right end of the shaft of the servo motor (4) is fixed with a main gear (403). Both ends of the main gear (403) are fixed with positioning bearings (402). The outer ring of each positioning bearing (402) is fixedly connected to the gear box (401). The top of the main gear (403) is meshed with an amplifying gear (404), which meshes with the gear plate (405) on its top.

4. A coupling tightening machine with high-precision torque according to claim 3, characterized in that: The brake disc (204) is externally slidably connected to a friction brake band (809). Friction band hinge blocks (805) are fixed at both ends of the friction brake band (809). The friction band hinge blocks (805) are hinged to the friction band moving rods (804). Each friction band moving rod (804) is hinged to a friction band positioning rod (803) at its bottom. Each friction band positioning rod (803) is fixedly connected to the outer ring of the outer full roller bearing (201) through a flange.

5. A coupling tightening machine with high-precision torque according to claim 4, characterized in that: The friction brake band (809) has a tension band (808) at its left end that is slidably connected to the brake disc (204). The tension band (808) has a tension spring (807) fixed at the top rear end via a positioning buckle (810). The tension spring (807) has a tension bolt (806) fixed at its bottom. The lower end of the tension bolt (806) is fastened to the lower end of the tension band (808) via a positioning nut (811).

6. A coupling tightening machine with high-precision torque according to claim 5, characterized in that: The back clamping cylinder (502) is hinged to the back clamp support (304) via the back clamping cylinder positioning block (506). A hinge ring (501) is fixed at the top of the back clamping cylinder (502). Back clamping rotating arms (5) are hinged to the left and right ends of the hinge ring (501). A connecting block (503) is fixed inside each back clamping rotating arm (5). A guide key (504) is snapped onto the outside of each spacer guide block (607). Each connecting block (503) is hinged to the guide key (504) inside it via the connecting block positioning rod (505). The through-beam probe (802) is fixedly connected to the main clamp (2) via the through-beam probe bracket (8). A probe (801) is fixed at the right end of the main clamp (2).

7. A coupling tightening machine with high-precision torque according to claim 6, characterized in that: The main jaw (2) is provided with main jaw plates (203) at both ends. The main jaw plates (203) are fastened to the positioning frame (605) inside by bolts. The curve plate (606) at the left end is fastened to the outer ring of the inner full roller bearing (202) by the left end curve plate positioning block (205). The curve plate (606) at the right end is fixedly connected to the back jaw (3) outside. The inner full roller bearing (202) is fixed to the outside of the main jaw plate (203). The outer ring of the inner full roller bearing (202) is fixed to the outside of the outer ring of the inner full roller bearing (202). The outer ring of the outer full roller bearing (201) is fixed to the outer ring of the main jaw (201). The outer ring of the outer full roller bearing (201) is fixedly connected to the main jaw (2).

8. A coupling tightening machine with high-precision torque according to claim 7, characterized in that: Each jaw body (6) has a jaw (601) inside it. Each jaw body (6) is fastened to the positioning frame (605) on its outer side by a positioning bolt (609). Each positioning frame (605) has an inner positioning pin (602) fixed at both ends. Each inner positioning pin (602) has an outer positioning pin (603) on its outer side. The two sets of outer positioning pins (603) on the left end are fastened to the main jaw plate (203). The two sets of outer positioning pins (603) on the right end are fastened to the back jaw plate (301). A return spring (604) is fixed between each set of inner positioning pins (602) and outer positioning pins (603). A photoelectric sensor (302) is fixed at the right end of the back jaw (3).

9. A coupling tightening machine with high-precision torque according to claim 8, characterized in that: The jaw plate position detection disk (701) has several detection disk hinge blocks (704) fixed on its left side. Each detection disk hinge block (704) has a detection disk hinge rod (705) fixed on its left side. Each detection disk hinge rod (705) is fixedly connected to the inner positioning pin (602) at its left end. The jaw plate position detection disk (701) also has several auxiliary connecting plate positioning shafts (702) fixed on its right end. Each auxiliary connecting plate positioning shaft (702) is provided with an auxiliary connecting plate positioning shaft spring (703) on its outside. The several auxiliary connecting plate positioning shafts (702) are fastened to the guide rod auxiliary connecting plate (7) at its right end by bolts.

10. A coupling tightening machine with high-precision torque according to claim 9, characterized in that: One end of the tension sensor (9) is hinged to the slider (102) via a tension sensor hinge block (901), and the other end of the tension sensor (9) is hinged to a back clamp tension plate (902). The back clamp tension plate (902) is hinged to the back clamp support (304) on its left side via two pins. Each of the spacer guide blocks (607) on the left end is fastened to the main clamp jaw plate (203) via a set of connecting screws (608). Each of the spacer guide blocks (607) on the right end is fastened to the back clamp jaw plate (301) via a set of connecting screws (608) on the right end. The back clamp rotation arm (5) is fastened to the back clamp jaw plate (301) via several connecting screws (608) on the right end.

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