Vacuum adsorption fixed type flexible transmission nut mounting machine

Abstract

The application discloses a vacuum adsorption fixed type flexible transmission nut mounting machine and belongs to the technical field of nut mounting. The nut state adjusting slide is used for adjusting the posture of nuts and conveying the nuts to the nut positioning mechanism; the nut shielding mechanism is used for shielding the nut state adjusting slide and preventing the nuts in the nut state adjusting slide from falling into the nut positioning mechanism; the nut positioning mechanism is used for positioning the nuts to ensure that the nut postures correspond to the hexagonal mounting grooves; and the nut transmission bearing mounting rod is used for bearing and mounting the nuts. The nut state adjusting slide is used for adjusting the state of the nuts, so that the nuts can smoothly enter the hexagonal mounting grooves in the end surface of the transmission rod body, the stability of nut mounting is greatly improved, the failure rate is reduced, and the work efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of nut installation technology, specifically to a nut installation machine. Background Technology

[0002] The existing nut installation machines have the following drawbacks in practical applications: firstly, nuts are prone to falling off during installation; secondly, the working performance of the nut installation machines is unstable, resulting in low installation efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a vacuum adsorption fixed flexible transmission nut installation machine with stable working performance and high working efficiency.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A vacuum adsorption fixed flexible transmission nut installation machine includes a nut state adjustment slide, a nut blocking mechanism, a nut positioning mechanism, a nut transmission bearing mounting rod, a nut installation rotation mechanism, and a nut installation feeding mechanism. The nut state adjustment slide is used to adjust the nut's posture and transport the nut to the nut positioning mechanism. The nut blocking mechanism is used to block the nut state adjustment slide to prevent the nut from falling into the nut positioning mechanism. The nut positioning mechanism is used to position the nut to ensure that its posture corresponds to the hexagonal mounting groove on the end face of the nut transmission bearing mounting rod. The nut transmission bearing mounting rod is used to support and install the nut. The nut installation rotation mechanism is used to drive the nut transmission bearing mounting rod to rotate. The nut installation feeding mechanism is used to drive the nut transmission bearing mounting rod to move linearly.

[0005] Furthermore, the nut transmission bearing mounting rod includes a transmission rod body, a spring, and a nut bearing tube. A receiving hole is provided on one end face of the transmission rod body. The nut bearing tube and spring are located within the receiving hole, with the spring positioned between the end of the receiving hole and the nut bearing tube. A sealing ring is provided between the nut bearing tube and the inner wall of the receiving hole. A nut bearing rod is provided at the closed end of the nut bearing tube. Nut suction holes are distributed around the closed end of the nut bearing tube and around the nut bearing rod. The nut suction holes communicate with the cavity inside the nut bearing tube. The cavity inside the nut bearing tube communicates with the receiving hole. The receiving hole communicates with a vacuum channel within the transmission rod body. The vacuum channel is connected to a main vacuum pipeline via a vacuum branch pipe C. An electromagnetic three-way valve C is provided on the vacuum branch pipe C. The main vacuum pipeline is connected to a vacuum pump.

[0006] Furthermore, the hexagonal mounting groove is provided on the end face of the transmission rod and located at the receiving hole. When the nut is rotated and installed, the nut bearing tube retracts into the receiving hole, and the hexagonal mounting groove is used to accommodate the nut.

[0007] Furthermore, the nut positioning mechanism includes a left positioning block and a right positioning block. The left and right positioning blocks have left and right positioning grooves on their sides, respectively. A left airflow channel and a right airflow channel are respectively provided inside the left and right positioning blocks. The left and right airflow channels are connected to one end of the extraction branch pipe A and the extraction branch pipe B, respectively. The other end of the extraction branch pipe A and the extraction branch pipe B are connected to the main extraction pipe. Electromagnetic three-way valve A and electromagnetic three-way valve B are respectively installed on the extraction branch pipe A and the extraction branch pipe B. Two connection ports of electromagnetic three-way valve A are connected in series to the air extraction branch pipe A, and two connection ports of electromagnetic three-way valve B are connected in series to the air extraction branch pipe B. The third connection port of electromagnetic three-way valve A and electromagnetic three-way valve B is open to the outside atmosphere. The left positioning groove is provided with a left positioning suction hole that communicates with the left airflow channel, and the right positioning groove is provided with a right positioning suction hole that communicates with the right airflow channel. The left and right positioning grooves together position the left and right sides of the nut, and the left and right positioning suction holes are used to adsorb and position the end face of the nut.

[0008] Furthermore, the nut positioning mechanism also includes a guide rail, a left slider, a right slider, a left cylinder, and a right cylinder. The left positioning block and the right positioning block are respectively mounted on the left slider and the right slider. The left slider and the right slider are mounted on the guide rail. The left cylinder and the right cylinder are respectively used to drive the left slider and the right slider to slide along the guide rail.

[0009] Furthermore, the width between the inner walls of the nut state adjustment slide is greater than the distance between the relative planes of the outer contour of the nut and less than the distance between the diagonals; the lower port of the nut state adjustment slide is located above the left positioning block and the right positioning block.

[0010] Furthermore, the nut blocking mechanism includes a support frame, a stop rod, and a blocking drive cylinder. One end of the stop rod is installed at the piston rod end of the blocking drive cylinder. The blocking drive cylinder is installed on the support frame, which is installed on the side wall of the nut state adjustment slide. The side wall of the nut state adjustment slide has a through hole. The other end of the stop rod driven by the blocking drive cylinder extends into the nut state adjustment slide through the through hole to block the nut in the nut state adjustment slide, thereby preventing the nut from falling into the nut positioning mechanism.

[0011] Furthermore, the nut installation feeding mechanism includes a feeding cylinder and a flexible transmission component. The flexible transmission component includes a transmission slider A, a transmission slider B, a slide rail, a limiting guide rod, and a transmission spring. The slide rail is mounted on the bottom surface of the base, and the transmission sliders A and B are mounted on the slide rail. The transmission rod of the nut transmission bearing mounting rod is mounted on a bracket via a bearing. The bracket is fixed to the transmission slider B. The transmission slider B has a through hole parallel to the slide rail. One end of the limiting guide rod is fixed to the end face of the transmission slider A, and the other end of the limiting guide rod passes through the through hole of the transmission slider B. The transmission spring is inserted into the limiting guide rod and located between the transmission sliders A and B. The feeding cylinder drives the transmission slider A to move along the slide rail. The transmission slider A drives the transmission slider B to move along the slide rail via the transmission spring. The transmission slider B drives the nut transmission bearing mounting rod to move linearly via the support frame.

[0012] Furthermore, the nut mounting rotation mechanism includes a rotary mounting motor, a reducer, and a sliding connector. The sliding connector includes a slide rod and a sliding sleeve. The slide rod is fixedly connected to the end of the transmission rod body. An elongated sliding hole is provided on the slide rod along its axial direction. One end of the sliding sleeve is inserted into the slide rod and connected by a pin. The pin passes through the elongated sliding hole and can slide along the elongated sliding hole. The other end of the sliding sleeve is fixedly connected to the output shaft of the reducer. The power input shaft of the reducer is connected to the output shaft of the rotary mounting motor. The reducer and the rotary mounting motor are mounted on a rotary drive base, which is mounted on the transmission slider A.

[0013] Furthermore, two fixed rods are installed on the side wall of the rotary drive base, and the ends of the two fixed rods are fixed with bearing sleeves. The transmission rod passes through the bearing sleeves and can rotate relative to the bearing sleeves or slide linearly relative to the bearing sleeves.

[0014] The beneficial effects of this invention are as follows: This application uses a nut state adjustment slide to adjust the state of the nut, allowing the nut to smoothly enter the hexagonal mounting groove on the end face of the transmission rod, which greatly improves the stability of nut installation, reduces the failure rate, and increases work efficiency.

[0015] This application improves the nut drive bearing mounting rod and nut positioning mechanism, so that the nut can be firmly held in place through the nut suction hole, thus solving the problem of the nut easily falling off during installation. Attached Figure Description

[0016] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 The diagram shows the structure of the nut-driven load-bearing mounting rod. Figure 3 for Figure 2 A schematic diagram of the structure at the end of the transmission rod shown; Figure 4 for Figure 1 The side view shown; Figure 5 for Figure 4 A top-view structural diagram of the left and right positioning blocks; Figure 6 for Figure 1 The rear view shown; Figure 7 for Figure 1 The bottom view shown; Figure 8 for Figure 1 The 3D diagram shown.

[0017] In the diagram: 1. Nut adjustment slide; 2. Nut blocking mechanism; 3. Nut positioning mechanism; 4. Nut transmission bearing mounting rod; 5. Nut installation rotation mechanism; 6. Nut installation feeding mechanism; 7. Transmission rod body; 8. Spring; 9. Nut bearing tube; 10. Storage hole; 11. Nut bearing rod; 12. Nut suction hole; 13. Cavity inside the nut bearing tube; 14. Vacuum channel; 15. Main air extraction pipeline; 16. Vacuum pump; 17. Hexagonal groove; 18. Left positioning block; 19. Right positioning block; 20. Left positioning groove; 21. Right positioning groove; 22. Left airflow channel; 23. Right airflow channel; 24. Left positioning suction hole; 25. Right positioning suction hole; 26. Guide rail; 27. Left slider 28. Right slider; 29. ​​Left cylinder; 30. Right cylinder; 31. Support frame; 32. Stop bar; 33. Blocking drive cylinder; 34. Through hole; 35. Feed cylinder; 36. Transmission slider A; 37. Transmission slider B; 38. Slide rail; 39. Limiting guide rod; 40. Transmission spring; 41. Base; 42. Bracket; 43. Through hole; 44. Rotary mounting motor; 45. Reducer; 46. Slide rod; 47. Slide sleeve; 48. Long slide hole; 49. Pin; 50. Rotary drive base; 51. Fixed rod; 52. Bearing slide sleeve; 53. Locking nut; 54. Suction branch pipe A; 55. Suction branch pipe B; 56. Solenoid three-way valve A; 57. Solenoid three-way valve B. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper surface," "lower surface," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "forward," "reverse," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] like Figure 1 As shown, a vacuum adsorption fixed flexible transmission nut installation machine includes a nut state adjustment slide 1, a nut blocking mechanism 2, a nut positioning mechanism 3, a nut transmission bearing mounting rod 4, a nut installation rotation mechanism 5, and a nut installation feeding mechanism 6. The nut state adjustment slide 1 is used to adjust the nut's posture and transport the nut to the nut positioning mechanism 2. The nut blocking mechanism 3 blocks the nut state adjustment slide 1 to prevent the nut from falling into the nut positioning mechanism 3. The nut positioning mechanism 3 positions the nut to ensure its posture corresponds to the hexagonal mounting groove on the end face of the nut transmission bearing mounting rod. The nut transmission bearing mounting rod 4 carries and installs the nut. The nut installation rotation mechanism 5 drives the nut transmission bearing mounting rod 4 to rotate, and the nut installation feeding mechanism 6 drives the nut transmission bearing mounting rod 4 to move linearly.

[0021] like Figure 2 , 3As shown, the nut transmission bearing mounting rod 4 includes a transmission rod body 7, a spring 8, and a nut bearing tube 9. A receiving hole 10 is provided on one end face of the transmission rod body 7. The nut bearing tube 9 and the spring 8 are located inside the receiving hole 10, with the spring 8 positioned between the end of the receiving hole 10 and the nut bearing tube 9. A sealing ring is provided between the nut bearing tube 9 and the inner wall of the receiving hole 10. A nut bearing rod 11 is provided at the closed end of the nut bearing tube 9. Nut suction holes 12 are distributed around the closed end of the nut bearing tube 9 and around the nut bearing rod 11. The nut suction holes 12 communicate with the cavity 13 inside the nut bearing tube. The cavity 13 inside the nut bearing tube communicates with the receiving hole 10. The receiving hole 10 communicates with the vacuum channel 14 inside the transmission rod body 7. The vacuum channel 14 is connected to the main vacuum channel 15 via a vacuum branch pipe C. An electromagnetic three-way valve C is provided on the vacuum branch pipe C. The main vacuum channel 15 is connected to a vacuum pump 16. The transmission rod 7 has a hexagonal groove 17 on its end face and located at the receiving hole 10. When the nut is rotated and installed, the nut bearing tube 9 retracts into the receiving hole 10, and the hexagonal groove 17 is used to accommodate the nut.

[0022] like Figure 4 , 5 As shown, the nut positioning mechanism 3 includes a left positioning block 18 and a right positioning block 19. The left positioning block 18 and the right positioning block 19 are respectively provided with a left positioning groove 20 and a right positioning groove 21 on their sides. The left positioning block 18 and the right positioning block 19 are respectively provided with a left airflow channel 22 and a right airflow channel 23. The left airflow channel 22 and the right airflow channel 23 are respectively connected to one end of the extraction branch pipe A54 and the extraction branch pipe B55. The extraction branch pipe A54 and the extraction... The other end of branch pipe B55 is connected to the main exhaust pipe 15. Electromagnetic three-way valves A56 and B57 are respectively installed on exhaust branch pipes A54 and B55. Two connection ports of electromagnetic three-way valve A56 are connected in series on exhaust branch pipe A54, and two connection ports of electromagnetic three-way valve B57 are connected in series on exhaust branch pipe B55. The third connection port of electromagnetic three-way valves A56 and B57 is open to the outside atmosphere.

[0023] The left positioning groove 20 is provided with a left positioning suction hole 24 that communicates with the left airflow channel 22, and the right positioning groove 21 is provided with a right positioning suction hole 25 that communicates with the right airflow channel 23. The left positioning groove 20 and the right positioning groove 21 together position the left and right sides of the nut, and the left positioning suction hole 24 and the right positioning suction hole 25 are used to adsorb and position the end face of the nut.

[0024] The width between the inner walls of the nut state adjustment slide 1 is greater than the distance between the relative planes of the outer contour of the nut and less than the distance between the diagonals, and is basically slightly greater than the distance between the relative planes of the outer contour of the nut; the lower port of the nut state adjustment slide 1 is located above the left positioning block 18 and the right positioning block 19.

[0025] The nut positioning mechanism 3 also includes a guide rail 26, a left slider 27, a right slider 28, a left cylinder 29, and a right cylinder 30. The left positioning block 18 and the right positioning block 19 are respectively mounted on the left slider 27 and the right slider 28. The left slider 27 and the right slider 28 are mounted on the guide rail 26. The left cylinder 29 and the right cylinder 30 are respectively used to drive the left slider 27 and the right slider 28 to slide along the guide rail 26.

[0026] like Figure 6 As shown, the nut blocking mechanism 3 includes a support frame 31, a stop rod 32, and a blocking drive cylinder 33. One end of the stop rod 32 is installed at the piston rod end of the blocking drive cylinder 33. The blocking drive cylinder 33 is installed on the support frame 31. The support frame 31 is installed on the side wall of the nut state adjustment slide 1. The side wall of the nut state adjustment slide 1 is provided with a through hole 34. The blocking drive cylinder 33 drives the other end of the stop rod 32 to extend into the nut state adjustment slide 1 through the through hole 34 to block the nut in the nut state adjustment slide 1 and prevent the nut from falling into the nut positioning mechanism 3.

[0027] like Figure 2 , 6 As shown in Figures 7 and 8, the nut installation feeding mechanism 6 includes a feeding cylinder 35 and a flexible transmission component. The flexible transmission component includes a transmission slider A36, a transmission slider B37, a slide rail 38, a limiting guide rod 39, and a transmission spring 40. The slide rail 38 is mounted on the bottom surface of the base 41, and the transmission sliders A36 and B37 are mounted on the slide rail 38. The transmission rod 7 in the nut transmission bearing mounting rod 4 is mounted on the bracket 42 via a bearing. The bracket 42 is fixed to the transmission slider B37, and the transmission slider B37 has a through hole 43 parallel to the slide rail 38. One end of the limiting guide rod 39 is fixed to the end face of the transmission slider A36, and the other end of the limiting guide rod 39 passes through the through hole 43 of the transmission slider B and is threadedly connected to the locking nut 53. The transmission spring 40 is inserted on the limiting guide rod 39 and is located between the transmission slider A36 and the transmission slider B37. The air inlet cylinder 35 is used to drive the transmission slider A36 to move along the slide rail 38. The transmission slider A36 drives the transmission slider B37 to move along the slide rail 38 through the transmission spring 40. The transmission slider B37 drives the nut to drive the bearing mounting rod 4 to make linear motion through the support frame 42.

[0028] The nut mounting rotation mechanism 5 includes a rotary mounting motor 44, a reducer 45, and a sliding connector. The sliding connector includes a slide rod 46 and a sliding sleeve 47. The slide rod 46 is fixedly connected to the end of the transmission rod body 7. The slide rod 46 has an elongated sliding hole 48 along its axial direction. One end of the sliding sleeve 47 is inserted into the slide rod 46 and connected by a pin 49. The pin 49 passes through the elongated sliding hole 48 and can slide along the elongated sliding hole 48. The other end of the sliding sleeve 47 is fixedly connected to the output shaft of the reducer 45. The power input shaft of the reducer 45 is connected to the output shaft of the rotary mounting motor 44. The reducer 45 and the rotary mounting motor 44 are mounted on a rotary drive base 50, which is mounted on a transmission slider A36.

[0029] Two fixed rods 51 are installed on the side wall of the rotary drive base 50. The ends of the two fixed rods 51 are fixed with bearing sleeves 52. The transmission rod 7 passes through the bearing sleeves 52. The transmission rod 7 can rotate relative to the bearing sleeves 52 and slide linearly relative to the bearing sleeves 52.

[0030] The work process is as follows: 1. Feeding: The control system starts the feeding vibratory feeder. After being sorted by the feeding vibratory feeder, the nuts enter the nut state adjustment slide 1. Since the width of the nut state adjustment slide 1 is slightly larger than the distance between the relative planes of the nut's outer contour, the posture of the nut after entering the nut state adjustment slide 1 is adjusted so that the sharp corners are facing upwards. The two planes of the nut's outer contour are nearly parallel to the side wall of the nut state adjustment slide 1. The nut falls down through the nut state adjustment slide 1 onto the left positioning groove 20 of the left positioning block 18 and the right positioning groove 21 of the right positioning block 19 in the nut positioning mechanism 3. The control system starts the blocking drive cylinder 33 so that the other end of the drive rod 32 extends into the nut state adjustment slide 1 through the through hole 34 to block the nut in the nut state adjustment slide 1, so as to prevent the nut from falling into the nut positioning mechanism 3 and ensure that only one nut can be in the nut positioning mechanism.

[0031] 2. Adsorption: The control system starts the vacuum pump 16 and opens the solenoid three-way valve A56 and solenoid three-way valve B57, adsorbing and positioning both sides of one end face of the nut through the left positioning suction hole 24 and the right positioning suction hole 25.

[0032] 3. The control system starts the nut installation feeding mechanism 6, drives the nut transmission bearing installation rod 4 to move forward, puts the nut to be installed onto the nut bearing rod 11 and makes the nut fit tightly against the end face of the nut bearing tube 9, until the nut on the nut positioning mechanism 3 enters into the hexagonal groove 17 on the end face of the transmission rod body 7, and then closes the nut installation feeding mechanism 6.

[0033] 4. Close the solenoid three-way valve A56 and solenoid three-way valve B57, block the air extraction branch pipe A54 and air extraction branch pipe B55, release the pressure in the left positioning suction hole 24 and the right positioning suction hole 25, open the solenoid three-way valve C, so that the air extraction branch pipe C is open, and the nut suction hole 12 on the end face of the nut bearing pipe 9 firmly sucks the nut.

[0034] 5. The control system starts the left cylinder 29 and right cylinder 30 in the nut positioning mechanism 3, which drives the left slider 27 and right slider 28 to move to both sides along the guide rail 26, thereby driving the left positioning block 18 and right positioning block 19 to move to both sides, leaving a channel and space for the installation of the nut, so as not to affect the forward movement of the nut transmission bearing mounting rod 4.

[0035] 6. The control system restarts the nut installation feed mechanism 6, causing the nut transmission bearing installation rod 4 to advance forward. When the nut presses against the end of the corresponding screw, the nut bearing tube 9 retracts into the receiving hole 10 under the pressure of the screw. At this time, the nut presses against the end face of the hexagonal groove 17 on the end face of the transmission rod body 7. Note that at this time, the nut installation feed mechanism 6 does not close, so as to provide feed force for nut installation. Since the nut installation feed mechanism 6 uses a flexible transmission component, it will not damage the relevant parts.

[0036] VII. The control system starts the nut installation rotating mechanism 5, which transmits torque through the hexagonal groove 17 to install the nut onto the corresponding screw. After the nut installation is completed, the vacuum pump, the nut installation feed mechanism 6, and the nut installation rotating mechanism 5 are turned off.

[0037] Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of those embodiments or examples, without contradiction. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A vacuum adsorption fixed flexible transmission type nut installation machine, characterized in that: The system includes a nut adjustment slide, a nut blocking mechanism, a nut positioning mechanism, a nut drive bearing mounting rod, a nut installation rotation mechanism, and a nut installation feeding mechanism. The nut adjustment slide adjusts the nut's posture and delivers it to the nut positioning mechanism. The nut blocking mechanism blocks the nut adjustment slide to prevent the nut from falling into the nut positioning mechanism. The nut positioning mechanism positions the nut to ensure its posture corresponds to the hexagonal mounting groove on the end face of the nut drive bearing mounting rod. The nut drive bearing mounting rod carries and installs the nut. The nut installation rotation mechanism drives the nut drive bearing mounting rod to rotate. The nut installation feeding mechanism drives the nut drive bearing mounting rod to move linearly. The nut transmission bearing mounting rod includes a transmission rod body, a spring, and a nut bearing tube. A receiving hole is provided on one end face of the transmission rod body. The nut bearing tube and spring are located within the receiving hole, with the spring positioned between the end of the receiving hole and the nut bearing tube. A sealing ring is provided between the nut bearing tube and the inner wall of the receiving hole. A nut bearing rod is provided at the closed end of the nut bearing tube. Nut suction holes are distributed around the closed end of the nut bearing tube and around the nut bearing rod. The nut suction holes communicate with the cavity inside the nut bearing tube. The cavity inside the nut bearing tube communicates with the receiving hole. The receiving hole communicates with a vacuum channel within the transmission rod body. The vacuum channel is connected to a main vacuum pipeline via a vacuum branch pipe C. An electromagnetic three-way valve C is provided on the vacuum branch pipe C. The main vacuum pipeline is connected to a vacuum pump. The hexagonal mounting groove is located on the end face of the transmission rod and at the receiving hole. When the nut is rotated for installation, the nut bearing tube retracts into the receiving hole, and the hexagonal mounting groove is used to accommodate the nut.

2. The vacuum adsorption fixed flexible transmission nut installation machine according to claim 1, characterized in that: The nut positioning mechanism includes a left positioning block and a right positioning block. The left and right positioning blocks have left and right positioning grooves on their sides, respectively. A left airflow channel and a right airflow channel are respectively provided inside the left and right positioning blocks. The left and right airflow channels are connected to one end of the extraction branch pipe A and extraction branch pipe B, respectively. The other end of extraction branch pipe A and extraction branch pipe B are connected to the main extraction pipe. Electromagnetic three-way valve A and electromagnetic three-way valve B are respectively installed on extraction branch pipe A and extraction branch pipe B. Two connection ports of the magnetic three-way valve A are connected in series to the air extraction branch pipe A, and two connection ports of the electromagnetic three-way valve B are connected in series to the air extraction branch pipe B. The third connection port of the electromagnetic three-way valve A and the electromagnetic three-way valve B is open to the outside atmosphere. The left positioning groove is provided with a left positioning suction hole that communicates with the left airflow channel, and the right positioning groove is provided with a right positioning suction hole that communicates with the right airflow channel. The left and right positioning grooves together position the left and right sides of the nut, and the left and right positioning suction holes are used to adsorb and position the end face of the nut.

3. The vacuum adsorption fixed flexible transmission nut installation machine according to claim 2, characterized in that: The nut positioning mechanism further includes a guide rail, a left slider, a right slider, a left cylinder, and a right cylinder. The left positioning block and the right positioning block are respectively mounted on the left slider and the right slider. The left slider and the right slider are mounted on the guide rail. The left cylinder and the right cylinder are respectively used to drive the left slider and the right slider to slide along the guide rail.

4. The vacuum adsorption fixed flexible transmission nut installation machine according to claim 3, characterized in that: The width between the inner walls of the nut state adjustment slide is greater than the distance between the relative planes of the nut's outer contour and less than the distance between the diagonals; the lower port of the nut state adjustment slide is located above the space between the left and right positioning blocks.

5. The vacuum adsorption fixed flexible transmission nut installation machine according to claim 4, characterized in that: The nut blocking mechanism includes a support frame, a stop rod, and a blocking drive cylinder. One end of the stop rod is installed at the piston rod end of the blocking drive cylinder. The blocking drive cylinder is installed on the support frame, which is installed on the side wall of the nut state adjustment slide. The side wall of the nut state adjustment slide has a through hole. The other end of the stop rod driven by the blocking drive cylinder extends into the nut state adjustment slide through the through hole to block the nut in the nut state adjustment slide, thereby preventing the nut from falling into the nut positioning mechanism.

6. The vacuum adsorption fixed flexible transmission nut installation machine according to claim 5, characterized in that: The nut installation feeding mechanism includes a feeding cylinder and a flexible transmission component. The flexible transmission component includes a transmission slider A, a transmission slider B, a slide rail, a limiting guide rod, and a transmission spring. The slide rail is mounted on the bottom surface of the base. Transmission slider A and transmission slider B are mounted on the slide rail. The transmission rod of the nut transmission bearing mounting rod is mounted on a bracket via a bearing. The bracket is fixed to transmission slider B. Transmission slider B has a through hole parallel to the slide rail. One end of the limiting guide rod is fixed to the end face of transmission slider A, and the other end of the limiting guide rod passes through the through hole of transmission slider B. The transmission spring is inserted into the limiting guide rod and located between transmission slider A and transmission slider B. The feeding cylinder drives transmission slider A to move along the slide rail. Transmission slider A drives transmission slider B to move along the slide rail via the transmission spring. Transmission slider B drives the nut transmission bearing mounting rod to move linearly via the bracket.

7. The vacuum adsorption fixed flexible transmission nut installation machine according to claim 6, characterized in that: The nut mounting and rotating mechanism includes a rotary mounting motor, a reducer, and a sliding connector. The sliding connector includes a slide rod and a sliding sleeve. The slide rod is fixedly connected to the end of the transmission rod body. An elongated sliding hole is provided on the slide rod along its axial direction. One end of the sliding sleeve is inserted into the slide rod and connected by a pin. The pin passes through the elongated sliding hole and can slide along the elongated sliding hole. The other end of the sliding sleeve is fixedly connected to the output shaft of the reducer. The power input shaft of the reducer is connected to the output shaft of the rotary mounting motor. The reducer and the rotary mounting motor are mounted on a rotary drive base, which is mounted on the transmission slider A.

8. The vacuum adsorption fixed flexible transmission nut installation machine according to claim 7, characterized in that: Two fixed rods are installed on the side wall of the rotary drive base. The ends of the two fixed rods are fixed with bearing sleeves. The transmission rod passes through the bearing sleeves. The transmission rod can rotate relative to the bearing sleeves and slide linearly relative to the bearing sleeves.

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