A connector guide centering force control nut tightening machine

Abstract

The present invention discloses a connector-guided centering force-controlled nut tightening machine, which relates to the field of assembly technology, including a nut tightening machine, a material box, and a feeding belt. The nut tightening machine is installed on a workbench, and the material box and the feeding belt are installed on a conveyor frame. The feeding belt is located below the material box, and a connector with a cable is placed in the material box. The conveyor frame is provided with a feeding table at a position corresponding to the front of the nut tightening machine, and a feeding mechanism is installed below the feeding table. A vibration motor is installed in the material box, and the connectors fall on the feeding belt one by one under the kinetic energy provided by the vibration motor. With the operation of the feeding belt, the connector gradually moves to the bottom of the feeding mechanism, and the feeding mechanism inserts the connector into the nut tightening machine, and the nut tightening machine screws the nut on the connector so that the nut is threadedly connected with the connector body. By setting the material box, the feeding belt, and the feeding mechanism, the process of manual feeding is replaced, and the nut tightening machine is used to replace the work of manual nut tightening, thereby improving the assembly efficiency of the connector as a whole.

Description

Technical Field

[0001] The invention relates to the technical field of assembly, in particular to a connector guide centering controlled force nut tightening machine. Background Art

[0002] Photovoltaic connectors are devices used to establish safe and reliable electrical connections between photovoltaic panels and between photovoltaic panels and other components of photovoltaic systems (such as inverters, charging controllers, and batteries). With the rise of new energy, the demand for connectors is also increasing. In the processing of cables and connectors, it is urgent to realize automated processing. In the existing processing technology of cables and connectors, one of the process steps is: inserting the cable into the connector and tightening the connector nut. Most of the existing processing processes are completed manually. Faced with the problem of increasing demand for connectors, traditional manual operations can no longer meet the growing demand. Summary of the invention

[0003] The purpose of the present invention is to provide a connector-guided, center-controlled force nut tightening machine to solve the problems raised in the prior art.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a connector-guided centering force-controlled nut tightening machine, comprising a loading platform, a module is installed below the loading platform, a lifting cylinder is installed on the slider of the module, a clamping cylinder is installed on the output end of the lifting cylinder, and also comprises a workbench, a conveyor frame and a nut tightening machine, the conveyor frame is installed on one side of the workbench, the nut tightening machine is arranged on the workbench, the loading platform is installed on the conveyor frame and is located in front of the nut tightening machine, a loading belt is installed on the conveyor frame, a material box is installed above one end of the conveyor frame, and a material receiving box is placed at the other end of the conveyor frame. The cable is convenient for picking up the connector and convenient for subsequent other circuits or electrical appliances to connect the connector. Put the connector with a section of cable into the material box. As the feeding belt runs, the connectors in the material box fall onto the feeding belt one by one. The feeding belt conveys the connectors. The clamping cylinder clamps the cable and inserts the connectors on the feeding belt into the nut tightening machine one by one. After the nut tightening machine tightens the nut on the connector body, the clamping cylinder takes the connector out of the nut tightening machine and places it on the feeding belt. As the feeding belt runs again, the connector with the nut not tightened moves to the bottom of the clamping cylinder, and the connector with the nut tightened falls into the receiving box. The module drives the clamping cylinder to move linearly through the lifting cylinder, and the lifting cylinder drives the clamping cylinder to move up and down, so that the clamping cylinder picks up the connector on the feeding belt or places the connector on the feeding belt. After the clamping cylinder picks up the connector, the module inserts the connector into the nut tightening machine through the clamping cylinder.

[0005] The nut tightening machine includes an external box body, a side door and a control box installed on the box body, a nut sleeve is installed in the front of the box body, a driving motor and a driving plate are installed in the front of the box body, a collar is installed on the outside of the nut sleeve, the collar is rotatably installed in the driving plate, and the driving motor drives the collar and the nut sleeve to rotate through the driving plate. A clamping cylinder is also installed inside the box body, and an upper bracket is installed on the output end of the clamping cylinder. Three clamping plates are rotatably installed on one end of the upper bracket. The clamping plate is inserted into the collar, and three clamping plates with inclined surfaces are slidably installed on one side of the nut sleeve. The clamping plate is slidably connected with the clamping plate through the inclined surface. After the clamping cylinder inserts the connector into the nut sleeve, the clamping cylinder works and pushes the upper bracket toward the direction of the driving plate, so that the clamping plate moves forward, and the clamping plate pushes the clamping plate toward the center position of the nut sleeve through the inclined surface. The three clamping plates cooperate with each other to clamp the nut on the connector. After the nut is clamped, the driving motor drives the collar and the nut sleeve to rotate through the driving plate to tighten the nut on the connector body.

[0006] Side plates are installed on both sides of the driving plate, and the two side plates are slidably connected to the upper bracket on the inner side through a slide rail slider. A guide rail is arranged inside the box body, and the guide rail is respectively installed with the upper bracket and the lower bracket through two sliders. A turntable is rotatably installed on the upper bracket, and the clamping plate is installed on the turntable through a slide groove slider. A sleeve is installed on the lower bracket, and the sleeve passes through the center of the turntable and is inserted into a collar. A push rod is slidably installed in the sleeve, and a spring for resetting the push rod is installed in the sleeve, one end of the spring is connected to the push rod, and one end of the push rod extends out of the sleeve and is installed with a baffle. A sensor is installed on the lower bracket, and a push cylinder is installed at one end of the lower bracket, and the push cylinder is connected to the box body. When the connector is inserted into the nut sleeve, the front end of the connector body is inserted into the sleeve, and the ejector in the sleeve is pushed out for a certain length. After the ejector is pushed out, the baffle is blocked at the sensor, so that the sensor receives a signal and transmits it to the control box. At this time, the control box first controls the clamping cylinder to work, so that the clamping plate clamps the nut, and then the push cylinder works, so that the sleeve supports the front end of the connector body, and when the nut is conveniently screwed, the nut can be tightened on the connector body, and finally the drive motor works, and the drive motor drives the collar and the nut sleeve to rotate through the drive plate, so that the nut is tightened on the connector body. During the rotation of the collar, the collar drives the clamping plate to rotate, and the clamping plate uses the turntable to achieve synchronous rotation.

[0007] A driving wheel, a tensioning wheel and a driven wheel are rotatably installed inside the driving plate. The driven wheel is installed outside the sleeve. The driving wheel is connected to the output shaft of the driving motor. The driving wheel is connected to the driven wheel through a transmission belt, and the tensioning wheel is pressed against one side of the transmission belt.

[0008] The material box is symmetrically installed with guide plates, and a diverter plate is installed between two guide plates inside the material box. The guide plates and the diverter plates are both installed with vibration motors. After the connectors are put into the material box, under the vibration of the vibration motor, several connectors are diverted to the gap between the guide plates and the diverter plates. Vibration is used to prevent the connectors from getting stuck in the material box and the gap.

[0009] Two outer conveyor belts are symmetrically installed below the material box, and an "L"-shaped shell is installed on one side of the material box. Each of the outer conveyor belts includes a guide wheel and three outer drive rollers, two of which are installed on the conveying frame, and the other outer drive roller and the guide wheel are installed on one side of the material box. A conveying chain plate is commonly installed on the three outer drive rollers, and the conveying chain plate includes a plurality of bases connected in series by steel cables and a baffle rotatably installed on the base. A torsion spring is installed at the rotating connection between the baffle and the base. The two outer conveyor belts cooperate with each other to form a material unloading area on the upper belt, and the width of the material unloading area is the same as the gap width between the guide plate and the diverter plate;

[0010] The two outer driving rollers are on the same vertical plane, one section of the conveyor chain is in a vertical state, and the feeding belt passes through the conveyor chain in a vertical state. The bases and baffles on the two outer conveyor belts correspond to each other, and the two baffles on the two outer conveyor belts cooperate with each other to form a long baffle. The two adjacent long baffles are distributed on the feeding belt and form a feeding area. The two long baffles cooperate with each other to limit the position of the connector, so that the connector is in a fixed area on the feeding belt.

[0011] Two vertical plates are installed at one end of the conveyor frame, and the feeding belt includes an inner driving roller installed on the conveyor frame and the two vertical plates. A feeding chain plate is installed on the two inner driving rollers. The feeding chain plate is composed of a number of material plates connected in series by steel wires. A limit block for limiting the position of the connector is installed on the material plate. The limit block is on the inner side of the unloading area. A guide plate with a right-angle trapezoidal cross-section is provided on one side of the inner driving roller on the inner side of the conveyor frame. When the connector is unloaded from the material box, the baffle covers the top of the material plate, and the connector falls from the material box and falls into the unloading area and is located between the two limit blocks. The limit block limits the cables on the connector, thereby limiting the position of the connector, which facilitates the alignment of the connector with the nut sleeve after loading. When the inner driving roller drives the feeding chain plate to operate, the material plate with the connector moves out from the vertical conveying chain plate. During the movement, the baffle can be pushed outward so that the baffle rotates on the base after being subjected to force. When the material plate without the connector (i.e., the empty material plate) moves in from the vertical conveying chain plate (i.e., moves toward the direction close to the material box), during the movement, the empty material plate pushes the baffle so that the baffle rotates on the base.

[0012] An annular clamping ring is arranged on the outer side of the outer driving roller, and a clamping plate is arranged on each of the bases. When the base passes through the outer driving roller, the clamping plate is embedded in the clamping ring.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: a connector with a cable is placed in a material box, a vibration motor is installed in the material box, and the connectors fall one by one on the feeding belt under the kinetic energy provided by the vibration motor. As the feeding belt runs, the connector gradually moves to the bottom of the feeding mechanism, and the feeding mechanism inserts the connector into the nut tightening machine, and the nut tightening machine tightens the nut on the connector so that the nut is threadedly connected with the connector body. By setting the material box, the feeding belt and the feeding mechanism, the manual feeding process is replaced, and the nut tightening machine is used to replace the manual nut tightening work, thereby improving the assembly efficiency of the connector as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0015] Figure 2 It is a three-dimensional view of the interior of the nut tightening machine of the present invention;

[0016] Figure 3 A three-dimensional diagram showing the connection between the driving motor and the driving board of the present invention;

[0017] Figure 4 A three-dimensional diagram showing the connection between the clamping cylinder and the upper bracket of the present invention;

[0018] Figure 5 It is a three-dimensional diagram of the interior of the driving plate of the present invention;

[0019] Figure 6 It is an exploded view of the connection structure of the nut sleeve, the collar and the clamping plate of the present invention;

[0020] Figure 7 A half-section view of the sleeve and the push rod of the present invention when connected;

[0021] Figure 8 It is a three-dimensional view of the interior of the material box of the present invention;

[0022] Fig. 9 It is a left view of the material box of the present invention installed on the conveying frame;

[0023] Fig.10 It is the position distribution diagram of the outer conveyor belt and the feeding belt of the present invention;

[0024] Fig.11 It is a three-dimensional diagram of a single outer drive roller and a base of the present invention.

[0025] In the figure: 1. workbench; 2. conveyor frame; 3. nut tightening machine; 4. loading platform; 5. material box; 6. outer conveyor belt; 7. loading belt; 8. control box; 9. nut sleeve; 10. drive motor; 11. drive plate; 12. clamping cylinder; 13. upper bracket; 14. side plate; 15. clamping plate; 16. push cylinder; 17. guide rail; 18. lower bracket; 19. sensor; 20. baffle; 21. sleeve; 22. turntable; 23. driving wheel; 24. driven wheel; 25. clamping plate; 26. collar; 27. ejector; 28. guide plate; 29. ​​diverter plate; 30. outer drive roller; 31. inner drive roller; 32. base; 33. baffle; 34. guide plate. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example: Figure 1 - Fig.11 As shown, the present invention provides a technical solution, a connector guided centering controlled force nut tightening machine, comprising a workbench 1, a conveyor frame 2, a nut tightening machine 3 and a loading platform 4, a module (not shown in the figure) is installed below the loading platform 4, a lifting cylinder (not shown in the figure) is installed on the slider of the module, a clamping cylinder (not shown in the figure) is installed at the output end of the lifting cylinder, the conveyor frame 2 is installed on one side of the workbench 1, the nut tightening machine 3 is arranged on the workbench 1, the loading platform 4 is installed on the conveyor frame 2 and is located in front of the nut tightening machine 3, a feeding belt 7 is installed on the conveyor frame 2, a material box 5 is installed above one end of the conveyor frame 2, and a material receiving box (not shown in the figure) is placed on the other end of the conveyor frame 2.

[0028] The nut tightening machine 3 includes an external box body, a side door installed on the box body and a control box 8, a nut sleeve 9 is installed in the front of the box body, a driving motor 10 and a driving plate 11 are installed in the front of the box body, a collar 26 is installed on the outside of the nut sleeve 9, the collar 26 is rotatably installed in the driving plate 11, and the driving motor 10 drives the collar 26 and the nut sleeve 9 to rotate through the driving plate 11. A clamping cylinder 12 is also installed inside the box body, and an upper bracket 13 is installed at the output end of the clamping cylinder 12. Three clamping plates 15 are rotatably installed at one end of the upper bracket 13, and the clamping plates 15 are inserted into the collar 26. Three clamping plates 25 with inclined surfaces are slidably installed on one side of the nut sleeve 9, and the clamping plates 15 are slidably connected to the clamping plates 25 through the inclined surfaces.

[0029] Side plates 14 are installed on both sides of the driving plate 11. The two side plates 14 are slidably connected to the inner upper bracket 13 through a slide rail slider. A guide rail 17 is arranged inside the box. The guide rail 17 is respectively installed with the upper bracket 13 and the lower bracket 18 through two sliders. A turntable 22 is rotatably installed on the upper bracket 13. The clamping plate 15 is installed on the turntable 22 through a slide groove slider. A sleeve 21 is installed on the lower bracket 18. The sleeve 21 passes through the center of the turntable 22 and is inserted into a collar 26. A push rod 27 is slidably installed in the sleeve 21. A spring for resetting the push rod 27 is installed in the sleeve 21. One end of the spring is connected to the push rod 27. One end of the push rod 27 extends out of the sleeve 21 and is installed with a baffle 20. A sensor 19 is installed on the lower bracket 18. A push cylinder 16 is installed at one end of the lower bracket 18, and the push cylinder 16 is connected to the box.

[0030] A driving wheel 23, a tensioning wheel and a driven wheel 24 are rotatably mounted inside the driving plate 11. The driven wheel 24 is mounted outside the collar 26. The driving wheel 23 is connected to the output shaft of the driving motor 10. A torque sensor (not shown) is mounted at the location where the driving wheel 23 is connected to the output shaft, so that the control box 8 can detect the force during tightening to prevent the nut and the connector body from being damaged. The driving wheel 23 is connected to the driven wheel 24 through a transmission belt, and the tensioning wheel is pressed against one side of the transmission belt.

[0031] Guide plates 28 are symmetrically installed inside the material box 5, and a diverter plate 29 is installed between two guide plates 28 inside the material box 5. Vibration motors (not shown in the figure) are installed in the guide plates 28 and the diverter plates 29. Vibration is used to prevent the connector from getting stuck in the material box 5 and the gap.

[0032] Two outer conveyor belts 6 are symmetrically installed below the material box 5, and an "L"-shaped shell is installed on one side of the material box 5. Each outer conveyor belt 6 includes a guide wheel and three outer drive rollers 30, two of which are installed on the conveying frame 2, and two of which are connected to a rotating motor. The rotating motor drives the outer drive rollers 30 to drive the conveying chain plate to operate. The other outer drive roller 30 and the guide wheel are installed on a side shell of the material box 5. The three outer drive rollers 30 are jointly installed with a conveying chain plate. The conveying chain plate includes a plurality of bases 32 connected in series by steel cables and a baffle 33 rotatably installed on the base 32. An annular clamping ring is arranged on the outer side of the outer drive roller 30, and a clamping plate is arranged on each base 32. When the base 32 passes through the outer drive roller 30, the clamping plate is embedded in the clamping ring;

[0033] A torsion spring is installed at the rotation connection between the baffle 33 and the base 32. The two outer conveyor belts 6 cooperate with each other to form a material discharge area on the material discharge belt 7. The width of the material discharge area is the same as the gap width between the guide plate 28 and the diverter plate 29.

[0034] The two outer driving rollers 30 are on the same vertical plane, a section of the conveying chain plate is in a vertical state, and the feeding belt 7 passes through the conveying chain plate in the vertical state.

[0035] The base 32 and the baffle 33 on the two outer conveyor belts 6 correspond to each other, and the two baffles 33 on the two outer conveyor belts 6 cooperate with each other to form a long baffle. The two adjacent long baffles are distributed on the loading belt 7 and form a unloading area. The two long baffles cooperate with each other to limit the position of the connector so that the connector is in a fixed area on the loading belt 7.

[0036] Two vertical plates are installed at one end of the conveyor frame 2, and the feeding belt 7 includes an inner driving roller 31 installed on the conveyor frame 2 and the two vertical plates. The inner driving roller 31 is connected to the feeding motor, and the feeding motor drives the inner driving roller 31 to rotate, so that the inner driving roller 31 drives the feeding chain plate to operate. The two inner driving rollers 31 are jointly installed with a feeding chain plate, and the feeding chain plate is composed of a plurality of material plates connected in series by steel wires. A limit block for limiting the position of the connector is installed on the material plate, and the limit block is on the inner side of the unloading area. A guide plate 34 with a right-angled trapezoidal cross-section is provided on one side of the inner driving roller 31 on the inner side of the conveyor frame 2. The guide plate 34 raises the height of the lower unloading chain plate, so that the lower chain plate can easily pass through the vertical conveying chain plate.

[0037] The working principle of the present invention is as follows: a connector with a section of cable is placed into the material box 5, and the vibration motor is started. Under the vibration action of the vibration motor, a number of connectors are diverted to the gap between the guide plate 28 and the diverter plate 29 and arranged in sequence.

[0038] Under the rotation of the outer driving roller 30 and the inner driving roller 31, the conveying chain plate and the feeding chain plate operate synchronously. When not moving to the unloading area, the baffle 33 blocks the gap between the guide plate 28 and the diverter plate 29 to prevent the connector from falling. When moving to the unloading area, the baffle 33 covers the top of the material plate, and the connector falls from the material box 5 and falls into the unloading area and is located between the two limit blocks. The limit blocks limit the cables on the connector, thereby limiting the position of the connector.

[0039] When the inner driving roller 31 drives the loading chain plate to operate, the material plate with the connector moves out from the vertical conveying chain plate. During the movement, the baffle 33 can be pushed outward so that the baffle 33 rotates on the base 32 after being subjected to force. When the material plate without the connector moves in from the vertical conveying chain plate, during the movement, the empty material plate pushes the baffle 33 so that the baffle 33 rotates on the base 32.

[0040] As the feeding belt 7 runs, the feeding belt 7 transports the connector. When it moves to the bottom of the clamping cylinder, the lifting cylinder lowers the clamping cylinder. After the clamping cylinder clamps the cable, the lifting cylinder lifts the clamping cylinder and inserts the connector into the nut sleeve 9 under the drive of the module.

[0041] When the connector is inserted into the nut sleeve 9, the front end of the connector body is inserted into the sleeve 21, and the push rod 27 in the sleeve 21 is pushed out for a certain length. After the push rod 27 is pushed out, the baffle 20 blocks the sensor 19, so that the sensor 19 receives the signal and transmits it to the control box 8. At this time, the control box 8 first controls the clamping cylinder 12 to work, so that the clamping plate 25 clamps the nut, and then the pushing cylinder 16 works, so that the sleeve 21 presses against the front end of the connector body, so that the nut can be tightened on the connector body when it is convenient to screw the nut. Finally, the drive motor 10 is operated, and the drive motor 10 drives the ring 26 and the nut sleeve 9 to rotate through the drive plate 11, so that the nut is tightened on the connector body.

[0042] After the nut is tightened, all cylinders are reset, and the push rod 27 is reset in the sleeve 21. Then the module drives the clamping cylinder to reset, and the lifting cylinder cooperates with the clamping cylinder to place the connector for tightening the nut on the feeding belt 7. As the feeding belt 7 runs, the connector finally falls into the receiving box.

[0043] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A connector guide centering controlled force nut tightening machine, comprising a loading platform (4), a module is installed below the loading platform (4), a lifting cylinder is installed on the slider of the module, and a clamping cylinder is installed at the output end of the lifting cylinder, characterized in that: It also comprises a workbench (1), a conveying frame (2) and a nut tightening machine (3), wherein the conveying frame (2) is mounted on one side of the workbench (1), the nut tightening machine (3) is arranged on the workbench (1), a loading platform (4) is mounted on the conveying frame (2) and is located in front of the nut tightening machine (3), a loading belt (7) is mounted on the conveying frame (2), a material box (5) is mounted above one end of the conveying frame (2), and a material receiving box is placed at the other end of the conveying frame (2); The nut tightening machine (3) comprises an external box body, a side door mounted on the box body, and a control box (8); a nut sleeve (9) is mounted at the front of the box body; a driving motor (10) and a driving plate (11) are mounted at the front of the box body; a collar (26) is mounted on the outside of the nut sleeve (9); the collar (26) is rotatably mounted in the driving plate (11); the driving motor (10) drives the collar (26) and the nut sleeve (9) to rotate via the driving plate (11); A clamping cylinder (12) is also installed inside the box body, and an upper bracket (13) is installed at the output end of the clamping cylinder (12). Three clamping plates (15) are rotatably installed at one end of the upper bracket (13), and the clamping plates (15) are inserted into the collar (26). Three clamping plates (25) with inclined surfaces are slidably installed on one side of the nut sleeve (9), and the clamping plates (15) are slidably connected to the clamping plates (25) via the inclined surfaces. Side plates (14) are installed on both sides of the driving plate (11), and the two side plates (14) are slidably connected to the inner upper bracket (13) through a slide rail slider. A guide rail (17) is arranged inside the box body, and the guide rail (17) is respectively installed on the upper bracket (13) and the lower bracket (18) through two sliders. A turntable (22) is rotatably installed on the upper bracket (13), and the clamping plate (15) is installed on the turntable (22) through a slide groove slider. A sleeve (21) is installed on the lower bracket (18). A sleeve (21) passes through the center of the rotating disk (22) and is inserted into the collar (26). A push rod (27) is slidably mounted in the sleeve (21). A spring for resetting the push rod (27) is mounted in the sleeve (21). One end of the spring is connected to the push rod (27). One end of the push rod (27) extends out of the sleeve (21) and is mounted with a baffle (20). A sensor (19) is mounted on the lower bracket (18). A push cylinder (16) is mounted at one end of the lower bracket (18). The push cylinder (16) is connected to the box.

2. A connector guide centering force controlled nut tightening machine according to claim 1, characterized in that: A driving wheel (23), a tensioning wheel and a driven wheel (24) are rotatably mounted inside the driving plate (11); the driven wheel (24) is mounted outside the sleeve (26); the driving wheel (23) is connected to the output shaft of the driving motor (10); the driving wheel (23) is connected to the driven wheel (24) via a transmission belt; and the tensioning wheel is pressed against one side of the transmission belt.

3. A connector guide centering force controlled nut tightening machine according to claim 1, characterized in that: Guide plates (28) are symmetrically installed inside the material box (5), a flow divider plate (29) is installed between two flow guide plates (28) inside the material box (5), and vibration motors are installed in the flow guide plates (28) and the flow divider plates (29).

4. A connector guide centering force controlled nut tightening machine according to claim 3, characterized in that: Two outer conveyor belts (6) are symmetrically installed below the material box (5), and an "L"-shaped shell is installed on one side of the material box (5). Each of the outer conveyor belts (6) includes a guide wheel and three outer drive rollers (30), wherein two of the outer drive rollers (30) are installed on the conveying frame (2), and the other outer drive roller (30) and the guide wheel are installed on a shell on one side of the material box (5). A conveyor chain plate is installed on the three outer drive rollers (30), and the conveyor chain plate includes a plurality of bases (32) connected in series by steel cables and a baffle (33) rotatably installed on the base (32). A torsion spring is installed at the rotation connection between the baffle (33) and the base (32). The two outer conveyor belts (6) cooperate with each other to form a material discharge area on the material supply belt (7), and the width of the material discharge area is the same as the gap width between the guide plate (28) and the diverter plate (29); The two outer drive rollers (30) are on the same vertical plane, a section of the conveying chain plate is in a vertical state, and the loading belt (7) passes through the conveying chain plate in the vertical state.

5. A connector guide centering force controlled nut tightening machine according to claim 4, characterized in that: Two vertical plates are installed at one end of the conveyor frame (2), and the loading belt (7) includes an inner driving roller (31) installed on the conveyor frame (2) and the two vertical plates. A loading chain plate is installed on the two inner driving rollers (31), and the loading chain plate is composed of a plurality of material plates connected in series by steel wires. A limit block for limiting the position of the connector is installed on the material plate, and the limit block is located on the inner side of the unloading area. A guide plate (34) with a right-angled trapezoidal cross-section is provided on one side of the inner driving roller (31) on the inner side of the conveyor frame (2).

6. A connector guide centering force controlled nut tightening machine according to claim 4, characterized in that: An annular clamping ring is arranged on the outside of the outer driving roller (30), and a clamping plate is arranged on each of the bases (32). When the base (32) passes the outer driving roller (30), the clamping plate is embedded in the clamping ring.

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