Nut locking device

Abstract

The present invention discloses a nut locking device, including a support platform, a pipe loading position is set at one end of the support platform, a nut feeding position is set at the other end of the support platform, a nut locking mechanism is provided at the nut feeding position, a pipe joint clamping mechanism for fixing the pipe fitting is slidably set on the support platform, the pipe joint clamping mechanism is connected with a translation mechanism, the nut locking mechanism is provided with a locking piece, the translation mechanism drives the pipe joint clamping mechanism to be transmitted from the pipe loading position to the nut feeding position, and the nut is screwed onto the pipe joint of the pipe fitting through the locking piece. The nut locking device of the present invention realizes the clamping of the pipe joint by setting the pipe joint clamping mechanism, and the special-shaped plug increases the holding force of the pipe joint clamping mechanism to meet the reaction force generated when the locking torque is applied, so as to realize the locking of the nut and the pipe joint.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioner production, and in particular to a nut locking device. Background Art

[0002] During the production of air conditioners, pipe assemblies and connecting pipes need to be connected by threads. Before using the pipe joints of the pipe assemblies, nuts or nuts need to be manually screwed onto the pipe joints. The existing operation mode is to manually place the welded pipe joint assembly on the ring line tooling, wait for the cooling to be completed, remove the pipe joint assembly and place it on the positioning tooling, and use a handheld electric screwdriver to assemble and lock the nuts or nuts onto the pipe joints one by one. This operation mode has the following defects: manual operation requires many turns and high labor intensity, and there is a situation where the nuts or nuts are not locked in place or cannot be locked, which poses a major quality risk. Summary of the invention

[0003] The purpose of the present invention is to provide a nut locking device to solve the technical problem in the existing air conditioner production that when the nut is tightened on the pipe joint, manual operation causes the two to be not locked in place or cannot be locked, causing quality risks.

[0004] To achieve the above purpose, the specific technical solution of a nut locking device of the present invention is as follows:

[0005] A nut locking device comprises a supporting platform, a pipe loading position is arranged at one end of the supporting platform, a nut feeding position is arranged at the other end of the supporting platform, a nut locking mechanism is arranged at the nut feeding position, a pipe joint clamping mechanism for fixing the pipe fitting is arranged slidingly on the supporting platform, the pipe joint clamping mechanism is connected with a translation mechanism, the nut locking mechanism is provided with a locking piece, the translation mechanism drives the pipe joint clamping mechanism to be transferred from the pipe loading position to the nut feeding position, and the nut is screwed onto the pipe joint of the pipe fitting through the locking piece.

[0006] Furthermore, the pipe joint clamping mechanism includes an upper pipe clamp mounting plate and a first mounting plate connected by a connecting rod, slide rails are arranged in pairs on the support platform, slide seats are provided on the slide rails, two ends of the first mounting plate are respectively fixed on the slide seats on both sides, a plurality of upper pipe clamps are arranged side by side on the upper pipe clamp mounting plate, a plurality of lower pipe clamps are provided on the bottom surface of the first mounting plate, and the upper pipe clamps and the lower pipe clamps are arranged relatively to each other.

[0007] Furthermore, the lower tube clamp includes a first clamping arm and a second clamping arm hinged together by a hinge shaft, the control parts of the first clamping arm and the second clamping arm are connected by a return spring, the top end of the hinge shaft is fixed on the lower tube clamp mounting plate, the lower tube clamp mounting plate and the first mounting plate are fixedly connected by a connecting rod, a driving cylinder is arranged on the first mounting plate above the control part of the lower tube clamp, and a special-shaped plug is fixed on the driving shaft of the driving cylinder.

[0008] Furthermore, the translation mechanism includes a lead screw and a nut pair screwed on the lead screw, the nut pair is fixed at the center of the bottom surface of the first mounting plate, both ends of the lead screw are rotatably fixed on the support platform, one end of the lead screw is connected to a translation motor, the translation motor is fixed on the support platform, the lead screw is placed between two slide rails, and the lead screw and the slide rails are parallel to each other.

[0009] Furthermore, it also includes a pipe joint positioning mechanism arranged at the upper material position of the pipe fitting, the pipe joint positioning mechanism includes a positioning plate, a plurality of positioning seats are arranged side by side on the positioning plate, two positioning holes are respectively arranged on the positioning seats, the positioning seats are arranged opposite to the lower pipe clamp, a lifting cylinder is arranged in the middle of the positioning plate, and the positioning plate can be lifted and fixed on the supporting platform.

[0010] Furthermore, it also includes a cooling mechanism arranged in the middle of the support platform, the support platform is formed by welding and fixing multiple support rods arranged horizontally and vertically, and the cooling mechanism includes a cooling nozzle arranged on the support rod, and the cooling nozzle is connected to a cold source that transports a cooling medium through a pipeline.

[0011] Furthermore, the nut locking mechanism includes a lifting plate for fixing the locking piece, the locking piece is an electric screwdriver, a nut sleeve is provided on the electric screwdriver, a third mounting plate is provided below the lifting plate, a screw is threaded at the center of the third mounting plate, the top of the screw extends toward the lifting plate, the bottom of the screw is fixed to the driving shaft of the lifting motor, the lifting motor is fixed to the motor mounting plate, and also includes a guide rod, the guide rod passes through the third mounting plate and the two ends are respectively fixed to the lifting plate and the motor mounting plate, and the lifting plate is slidably fixed on the two-dimensional driving mechanism.

[0012] Furthermore, the two-dimensional driving mechanism includes a square translation frame for fixing the nut locking mechanism, Y-axis guide rails are respectively arranged on the long sides of the top surface of the translation frame, Y-axis sliders are slidably arranged on the Y-axis guide rails, the lifting plate is fixed on the Y-axis sliders on both sides, a Y-axis cylinder is arranged along the long side direction of the translation frame, the driving shaft of the Y-axis cylinder is fixedly connected to the lifting plate, a pair of X-axis guide rails are arranged on the support platform, an X-axis slider is slidably arranged on the X-axis guide rails, the X-axis guide rail is perpendicular to the Y-axis guide rail and parallel to the slide rail, an X-axis cylinder is also arranged on the support platform, and the driving shaft of the X-axis cylinder is fixedly connected to the translation frame.

[0013] Furthermore, it also includes a nut discharging mechanism, which is arranged on one side of one of the nut feeding positions, and the nut discharging mechanism includes a vibration plate for holding the nuts and a discharging guide rail connected to the discharging port of the vibration plate.

[0014] Furthermore, the end of the discharging guide rail is connected to a storage barrel, a discharging cylinder is arranged on one side of the storage barrel, a baffle is arranged on the driving shaft of the discharging cylinder, an avoidance hole for the baffle to enter and exit is arranged on the side wall of the bottom end of the storage barrel, and a dividing cylinder is also arranged above the discharging cylinder, a baffle is arranged on the driving shaft of the dividing cylinder, and an opening is arranged on the side wall of the storage barrel to cooperate with the baffle, and the opening is opposite to the nut above the discharging nut.

[0015] A nut locking device of the present invention has the following advantages:

[0016] The nut locking device described in the present invention realizes the clamping of the pipe joint by setting up a pipe joint clamping mechanism. The special-shaped plug increases the holding force of the pipe joint clamping mechanism to meet the reaction force generated when the locking torque is applied, thereby realizing the locking of the nut and the pipe joint. The special-shaped plug adopts a conical gyro-type structure, which can automatically adjust the opening and closing degree of the clamping claw head, thereby realizing the clamping of pipe joints of different sizes, and has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of a nut locking device according to the present invention;

[0018] Figure 2 A three-dimensional diagram of the support platform of the present invention;

[0019] Figure 3 A three-dimensional diagram of the pipe joint clamping mechanism of the present invention;

[0020] Figure 4 It is a structural schematic diagram of the lower pipe clamp of the present invention;

[0021] Figure 5 It is a structural schematic diagram of the translation mechanism of the present invention;

[0022] Figure 6 It is a structural schematic diagram of the pipe joint positioning mechanism of the present invention;

[0023] Figure 7 is a three-dimensional diagram of the nut locking mechanism of the present invention;

[0024] Figure 8 It is a front view of the nut locking mechanism of the present invention;

[0025] Fig. 9 It is a three-dimensional diagram of the nut discharging mechanism of the present invention;

[0026] Fig.10 It is a cross-sectional view of the nut discharging mechanism of the present invention.

[0027] Explanation of the reference numerals in the figure: 1. Support platform; 11. Control panel; 2. Clamping mechanism of pipe joint; 21. Upper pipe clamp mounting plate; 22. First mounting plate; 23. Connecting rod; 24. Adjusting plate; 25. Upper pipe clamp; 26. Lower pipe clamp; 261. First clamping arm; 262. Second clamping arm; 263. Articulated shaft; 264. Lower pipe clamp mounting plate; 265. Driving cylinder; 266. Special-shaped plug; 267. Connecting rod; 3. Slide rail; 31. Slide seat; 4. Translation mechanism; 41. Lead screw; 42. Screw nut pair; 43. Translation motor; 5. Positioning mechanism of pipe joint; 51. Positioning plate; 52. Positioning seat; 53. Lifting cylinder; 54. Second mounting plate; 55. Guide rod; 5 6. Linear bearing; 6. Nut locking mechanism; 61. Lifting plate; 62. Third mounting plate; 63. Motor mounting plate; 64. Lifting motor; 65. Screw; 66. Electric screwdriver; 67. Guide rod; 7. Nut discharging mechanism; 71. Vibrating plate; 72. Discharging guide rail; 73. Storage barrel; 74. Positioning optical fiber; 75. Discharging cylinder; 751. Block; 76. Discharging cylinder; 761. Baffle; 8. Cooling mechanism; 81. Cooling nozzle; 82. Water trough; 9. Two-dimensional driving mechanism; 91. Translation frame; 92. Y-axis guide rail; 93. Y-axis cylinder; 94. Y-axis slider; 95. X-axis guide rail; 96. X-axis slider; 97. X-axis cylinder; 10. Pipe fittings. DETAILED DESCRIPTION

[0028] In order to better understand the purpose, structure and function of the present invention, a nut locking device of the present invention is further described in detail below in conjunction with the accompanying drawings.

[0029] like Figure 1 As shown, the present application provides a nut locking device, including a supporting platform 1, a pipe loading position is set at one end of the supporting platform 1, a nut feeding position is set at the other end of the supporting platform 1, the nut feeding position is provided with a nut locking mechanism 6 for providing nuts, a pipe joint clamping mechanism 2 for fixing the pipe fitting 10 is slidingly set on the supporting platform 1, the pipe joint clamping mechanism 2 is connected to a translation mechanism 4, the nut locking mechanism 6 is provided with a locking piece, the translation mechanism 4 drives the pipe joint clamping mechanism 2 to be transferred from the pipe loading position to the nut feeding position, and the nut is tightened on the pipe joint of the pipe fitting 10 through the locking piece.

[0030] like Figure 2 As shown, the support platform 1 is formed by welding and fixing a plurality of support rods arranged horizontally and vertically. The support platform 1 on the side of the pipe material position is provided with a control panel 11, and the control panel 11 is provided with a control switch. The support platform 1 is provided with a pair of slide rails 3, and the slide rails 3 are provided with a slide seat 31. The two ends of the pipe joint clamping mechanism 2 are respectively fixed on the slide seats 31 on both sides. Figure 2 In the embodiment, two pairs of slide rails 3 are arranged on the support platform 1, so that two sets of pipe joint clamping mechanisms 2 are arranged on the support platform 1 to improve the locking efficiency of the nuts.

[0031] In order to improve the assembly efficiency of nuts and pipe fittings, Figure 3-Figure 4 As shown, the pipe joint clamping mechanism 2 includes an upper pipe clamp mounting plate 21 and a first mounting plate 22 which are arranged opposite to each other. The upper pipe clamp mounting plate 21 and the first mounting plate 22 are connected by a connecting rod 23. The two ends of the first mounting plate 22 are respectively fixed to the slide seats 31 on both sides. A plurality of upper pipe clamps 25 are arranged side by side on the upper pipe clamp mounting plate 21. A plurality of lower pipe clamps 26 are arranged on the bottom surface of the first mounting plate 22. The upper pipe clamps 25 and the lower pipe clamps 26 are arranged opposite to each other. The number and position of the upper pipe clamps 25 and the lower pipe clamps 26 are determined according to production requirements. Figure 3 In the figure, four upper tube clamps 25 are arranged side by side on the upper tube clamp mounting plate 21, and four lower tube clamps 26 are arranged opposite to each other on the bottom surface of the first mounting plate 22.

[0032] like Figure 3 As shown, the upper tube clamp 25 is fixed on the adjustment plate 24, and a long hole is set on the adjustment plate 24. The long hole is set along the long side direction of the adjustment plate 24, and the upper tube clamp 25 is placed at one end of the long hole. A round hole is set on the upper tube clamp mounting plate 21, and the adjustment plate 24 is fixed to the upper tube clamp mounting plate 21 by fasteners, so as to adjust the protruding length of the upper tube clamp 25.

[0033] like Figure 4 As shown, the lower pipe clamp 26 includes a first clamping arm 261 and a second clamping arm 262. The middle parts of the first clamping arm 261 and the second clamping arm 262 are hinged together through a hinge shaft 263. One end of the first clamping arm 261 and the second clamping arm 262 is a clamping part for clamping the pipe fitting 10. The other end of the first clamping arm 261 and the second clamping arm 262 is a control part. The control parts of the first clamping arm 261 and the second clamping arm 262 are connected by a return spring. The top end of the hinge shaft 263 is fixed to the lower pipe fitting 10. On the clamp mounting plate 264, a connecting rod 267 is provided on the top surface of the lower pipe clamp mounting plate 264, and the top end of the connecting rod 267 is fixed to the bottom surface of the first mounting plate 22. A driving cylinder 265 is provided on the first mounting plate 22 above the control part, and a special-shaped plug 266 is fixed on the driving shaft of the driving cylinder 265. The special-shaped plug 266 is inserted between the first clamping arm 261 and the second clamping arm 262, so that the clamping parts of the first clamping arm 261 and the second clamping arm 262 are moved away from each other, so that the pipe fitting 10 is inserted into the lower pipe clamp 26.

[0034] The special-shaped plug 266 is in the shape of a conical gyro, and the diameter of the bottom end of the special-shaped plug 266 is smaller than the diameter of the top end. The special-shaped plug 266 can automatically adjust the opening and closing degree of the clamping claw head, thereby achieving the clamping of pipe fittings 10 of different sizes, and has strong versatility.

[0035] like Figure 5As shown, the translation mechanism 4 includes a lead screw 41 and a nut pair 42 screwed on the lead screw 41, the nut pair 42 is fixed at the center of the bottom surface of the first mounting plate 22, both ends of the lead screw 41 are rotatably fixed on the support platform 1 through bearing seats, one end of the lead screw 41 is connected to a translation motor 43, and the translation motor 43 is fixed on the support platform 1 through a motor bracket, the lead screw 41 is placed between the two slide rails 3, and the lead screw 41 and the slide rails 3 are parallel to each other.

[0036] In order to realize the positioning of the pipe joint, a pipe joint positioning mechanism 5 is also included, which is arranged at the upper material position of the pipe fitting. The pipe joint positioning mechanism 5 includes a positioning plate 51, on which a plurality of positioning seats 52 are arranged side by side, and two positioning holes for positioning the pipe joint are respectively arranged on the positioning seats 52. The positioning seats 52 are arranged opposite to the lower pipe clamp 26, and the two ends of the positioning plate 51 can be lifted and fixed on the supporting platform 1. Opposite to the lower pipe clamp 26, four positioning seats 52 are arranged side by side on the positioning plate 51.

[0037] In order to adapt to the positioning of pipes 10 of different sizes, Figure 6 As shown, a lifting cylinder 53 is arranged in the middle of the positioning plate 51, and the lifting cylinder 53 is fixed on the supporting platform 1. The driving shaft of the lifting cylinder 53 is fixed on the middle of the positioning plate 51. Linear bearings 56 are arranged at both ends of the positioning plate 51 respectively. A guide rod 55 is arranged in the linear bearing 56. The guide rod 55 can be lifted and lowered relative to the linear bearing 56. A second mounting plate 54 is arranged on the outer wall of the linear bearing 56, and the second mounting plate 54 is fixed on the supporting platform 1.

[0038] like Figure 2 As shown, the locking device also includes a cooling mechanism 8 arranged in the middle of the support platform 1, and the cooling mechanism 8 includes a cooling nozzle 81 arranged on the support rod. The cooling nozzle 81 sprays cooling medium to the pipe joint, and the cooling nozzle 81 is connected to a cold source for conveying cooling medium through a pipeline. In another embodiment, the cooling medium can be compressed air or water. When the cooling medium is water, a water receiving tank 82 is also provided under the support rod. When the pipe joint clamping mechanism 2 moves to the cooling nozzle 81, the pipe joint clamping mechanism 2 stops moving, and the cooling nozzle 81 is turned on to spray cooling medium to the pipe joint to cool the pipe joint, and then continues to move to the nut feeding position.

[0039] like Figure 7-Figure 8As shown, the nut locking mechanism 6 includes a lifting plate 61, the number of locking members is consistent with the number of lower pipe clamps 26, and the locking members are arranged side by side on the lifting plate 61. The locking member is an electric screwdriver 66, and the electric screwdriver 66 is provided with a nut sleeve. A third mounting plate 62 is provided below the lifting plate 61, and a screw rod 65 is screwed at the center of the third mounting plate 62. The top end of the screw rod 65 extends toward the lifting plate 61, and the bottom end of the screw rod 65 is fixed to the driving shaft of the lifting motor 64. The lifting motor 64 is fixed on the motor mounting plate 63. It also includes a guide rod 67. The lifting plate 61 is provided with a through hole for the guide rod 67 to pass through. The two ends of the guide rod 67 are respectively fixed on the lifting plate 61 and the motor mounting plate 63. The lifting plate 61 is slidably fixed on the two-dimensional driving mechanism 9, thereby realizing the alignment of the nut locking mechanism 6 and the pipe joint clamping mechanism 2.

[0040] like Figure 7 As shown, the two-dimensional driving mechanism 9 includes a square translation frame 91 for fixing the nut locking mechanism 6, Y-axis guide rails 92 are respectively arranged on the long sides of the top surface of the translation frame 91, and Y-axis sliders 94 are slidingly arranged on the Y-axis guide rails 92. The third mounting plate 62 is fixed on the Y-axis sliders 94 on both sides, and a Y-axis cylinder 93 is arranged on the translation frame 91 along the long side direction, and the driving shaft of the Y-axis cylinder 93 is fixedly connected to the lifting plate 61.

[0041] A pair of X-axis guide rails 95 are provided on the support platform 1, and an X-axis slider 96 is slidably set on the X-axis guide rails 95. The X-axis guide rails 95 are perpendicular to the Y-axis guide rails 92 and parallel to the slide rails 3. An X-axis cylinder 97 is also provided on the support platform 1. The driving shaft of the X-axis cylinder 97 is fixedly connected to the translation frame 91. The X-axis guide rails 95 span across the two pairs of slide rails 3, so that the nut locking mechanism 6 can switch between the two sleeve joint clamping mechanisms 2.

[0042] In order to realize automatic feeding of nuts, a nut discharging mechanism 7 is also included. The nut discharging mechanism 7 is arranged on one side of one of the nut feeding positions and is used to automatically put the nuts into the nut sleeve.

[0043] In order to enable the nut discharging mechanism 7 to supply nuts to multiple nut sleeves at the same time, the nut discharging mechanism 7 includes two sets, such as Figure 9-10 As shown, each set of nut discharging mechanism 7 includes a vibration plate 71 for holding nuts and a discharging guide rail 72 connected to the discharging port of the vibration plate 71, each vibration plate 71 is connected to two discharging guide rails 72, and the end of each discharging guide rail 72 is connected to a storage barrel 73, and a positioning optical fiber 74 is provided on the side wall of the storage barrel 73 to detect the presence or absence of nuts in real time. A discharging cylinder 76 is provided on one side of the storage barrel 73, and an avoidance hole is provided on the side wall of the bottom end of the storage barrel 73, and a baffle 761 is provided on the driving shaft of the discharging cylinder 76, and the baffle 761 passes through the avoidance hole, and the nut is placed above the baffle 761, so as to prevent the nut from leaking out of the storage barrel 73 when no discharging is required.

[0044] Furthermore, in order to prevent multiple nuts from being discharged at one time during discharging, a dividing cylinder 75 is provided above the discharging cylinder 76, and a stopper 751 is provided on the driving shaft of the dividing cylinder 75. An opening that cooperates with the stopper 751 is provided on the side wall of the storage barrel 73, and the opening is opposite to the nut above the discharging nut. When the nuts are discharged, the stopper 751 is tightened against the nut above the discharging nut, effectively preventing the situation of discharging multiple nuts at one time.

[0045] The nut locking device achieves the clamping of the pipe joint by setting up the pipe joint clamping mechanism 2. The special-shaped plug 266 increases the holding force of the pipe joint clamping mechanism 2 to meet the reaction force generated when the locking torque is applied, thereby achieving the locking of the nut and the pipe joint. The special-shaped plug 266 adopts a conical gyro structure, which can automatically adjust the opening and closing degree of the clamping claw head, thereby achieving the clamping of pipe joints of different sizes, and has strong versatility.

[0046] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A nut locking device, characterized in that: The invention comprises a support platform (1), a pipe loading position is arranged at one end of the support platform (1), a nut feeding position is arranged at the other end of the support platform (1), a nut locking mechanism (6) is arranged at the nut feeding position, a pipe joint clamping mechanism (2) for fixing the pipe (10) is arranged slidably on the support platform (1), the pipe joint clamping mechanism (2) is connected to a translation mechanism (4), the nut locking mechanism (6) is provided with a locking member, the translation mechanism (4) drives the pipe joint clamping mechanism (2) to be transferred from the pipe loading position to the nut feeding position, and the nut is screwed onto the pipe joint of the pipe (10) through the locking member; The pipe joint clamping mechanism (2) comprises an upper pipe clamp mounting plate (21) and a first mounting plate (22) connected by a connecting rod (23); a plurality of upper pipe clamps (25) are arranged side by side on the upper pipe clamp mounting plate (21); a plurality of lower pipe clamps (26) are arranged on the bottom surface of the first mounting plate (22); and the upper pipe clamps (25) and the lower pipe clamps (26) are arranged opposite to each other; A driving cylinder (265) is arranged on the first mounting plate (22) above the control part of the lower pipe clamp (26), and a special-shaped plug (266) is fixed on the driving shaft of the driving cylinder (265). The lower pipe clamp (26) comprises a first clamping arm (261) and a second clamping arm (262) which are hinged together through a hinge shaft (263). The control parts of the first clamping arm (261) and the second clamping arm (262) are connected through a return spring. The top end of the hinge shaft (263) is fixed on the lower pipe clamp mounting plate (264). The lower pipe clamp mounting plate (264) and the first mounting plate (22) are fixedly connected through a connecting rod (267). The nut locking mechanism (6) comprises a lifting plate (61) for fixing a locking member, wherein the locking member is an electric screwdriver (66), and a nut sleeve is arranged on the electric screwdriver (66). A third mounting plate (62) is arranged below the lifting plate (61), and a screw rod (65) is screwed at the center of the third mounting plate (62). The top end of the screw rod (65) extends toward the lifting plate (61), and the bottom end of the screw rod (65) is fixed on the driving shaft of the lifting motor (64). The lifting motor (64) is fixed on the motor mounting plate (63). The guide rod (67) also comprises a guide rod (67), which passes through the third mounting plate (62) and has two ends respectively fixed on the lifting plate (61) and the motor mounting plate (63). The lifting plate (61) is slidably fixed on the two-dimensional driving mechanism (9); The translation mechanism (4) comprises a lead screw (41) and a nut pair (42) screwed onto the lead screw (41); the nut pair (42) is fixed at the center of the bottom surface of the first mounting plate (22); both ends of the lead screw (41) are rotatably fixed on the support platform (1); the lead screw (41) is placed between two slide rails (3), and the lead screw (41) and the slide rails (3) are parallel to each other.

2. The nut locking device according to claim 1, characterized in that: Slide rails (3) are arranged in pairs on the support platform (1), and slide seats (31) are arranged on the slide rails (3). The two ends of the first mounting plate (22) are respectively fixed on the slide seats (31) on both sides.

3. The nut locking device according to claim 2, characterized in that: One end of the lead screw (41) is connected to a translation motor (43), and the translation motor (43) is fixed on the support platform (1).

4. The nut locking device according to claim 1, characterized in that: The nut locking device also includes a pipe joint positioning mechanism (5) arranged at the upper material position of the pipe fitting, the pipe joint positioning mechanism (5) includes a positioning plate (51), a plurality of positioning seats (52) are arranged side by side on the positioning plate (51), two positioning holes are respectively arranged on the positioning seats (52), the positioning seats (52) are arranged opposite to the lower pipe clamp (26), a lifting cylinder (53) is arranged in the middle of the positioning plate (51), and the positioning plate (51) can be lifted and fixed on the supporting platform (1).

5. The nut locking device according to claim 1, characterized in that: The nut locking device also includes a cooling mechanism (8) arranged in the middle of the support platform (1), the support platform (1) is formed by welding and fixing a plurality of support rods arranged horizontally and vertically, the cooling mechanism (8) includes a cooling nozzle (81) arranged on the support rod, and the cooling nozzle (81) is connected to a cold source for conveying a cooling medium through a pipeline.

6. The nut locking device according to claim 1, characterized in that: The two-dimensional driving mechanism (9) comprises a square translation frame (91) for fixing a nut locking mechanism (6); Y-axis guide rails (92) are respectively arranged on the long sides of the top surface of the translation frame (91); Y-axis sliders (94) are slidably arranged on the Y-axis guide rails (92); a third mounting plate (62) is fixed on the Y-axis sliders (94) on both sides; a Y-axis cylinder (93) is arranged on the translation frame (91) along the long side direction; a pair of X-axis guide rails (95) are arranged on the support platform (1); an X-axis slider (96) is slidably arranged on the X-axis guide rails (95); the X-axis guide rails (95) are perpendicular to the Y-axis guide rails (92) and parallel to the slide rails (3); an X-axis cylinder (97) is also arranged on the support platform (1); and a driving shaft of the X-axis cylinder (97) is fixedly connected to the translation frame (91).

7. The nut locking device according to claim 1, characterized in that: The nut locking device also includes a nut discharging mechanism (7), which is arranged on one side of one of the nut feeding positions, and includes a vibration plate (71) for holding nuts and a discharging guide rail (72) connected to the discharging port of the vibration plate (71).

8. The nut locking device according to claim 7, characterized in that: The end of the discharge guide rail (72) is connected to a storage barrel (73), a discharge cylinder (76) is arranged on one side of the storage barrel (73), a baffle (761) is arranged on the driving shaft of the discharge cylinder (76), an escape hole for the baffle (761) to enter and exit is arranged on the side wall at the bottom end of the storage barrel (73), a distribution cylinder (75) is arranged above the discharge cylinder (76), a baffle (751) is arranged on the driving shaft of the distribution cylinder (75), and an opening matched with the baffle (751) is arranged on the side wall of the storage barrel (73), and the opening is opposite to the nut above the discharge nut.

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