CN107953103B

CN107953103B - Automatic screw locking system compatible with various molded case circuit breaker bases and locking method

Info

Publication number: CN107953103B
Application number: CN201711467849.XA
Authority: CN
Inventors: 不公告发明人
Original assignee: Yueqing Yedao Electromechanical Co ltd
Current assignee: The dynamo-electric Co., Ltd in wild island, Leqing
Priority date: 2017-12-29
Filing date: 2017-12-29
Publication date: 2020-04-03
Anticipated expiration: 2037-12-29
Also published as: CN107953103A

Abstract

The invention provides an automatic screw locking system compatible with various molded case circuit breaker bases, which comprises a rack table board, a production line, a pressing device, a screw feeding mechanism and an automatic screw locking mechanism, wherein the rack table board is provided with a plurality of screw locking holes; the production line and the plurality of screw feeding mechanisms are arranged on the front side of the table top of the rack, and the plurality of automatic screw locking mechanisms are arranged on the back side of the table top of the rack; the pressing device comprises a supporting plate, and a plurality of base pressing units are arranged on the supporting plate; the number of the base pressing units, the number of the screw feeding mechanisms and the number of the automatic screw locking mechanisms are equal and are all 6; the automatic screw locking mechanism comprises a sixth cylinder, a seventh cylinder, a plurality of locking mechanisms, a plurality of screw chucks and a support frame; the locking mechanism comprises an electric screwdriver, a transmission mechanism and a screwdriver. The invention adopts the transmission mechanism of the 2-level universal joint and the screw chuck which can lead the screw to be automatically aligned, realizes the purposes of automatically aligning the screw to the locking hole, automatically increasing the rotating torque force of the screw driver and automatically locking the screw, and can be compatible with the screw locking of the bases of 4P, 3P and 2P molded case circuit breakers.

Description

Automatic screw locking system compatible with various molded case circuit breaker bases and locking method

Technical Field

The invention belongs to the technical field of circuit breaker screw installation equipment, and particularly relates to an automatic screw locking system compatible with various molded case circuit breaker bases and a locking method.

Background

The combination screw with flat pad and spring washer is the most important way to improve the production efficiency, but it has encountered considerable difficulties and problems in realizing the automation; the existing conductive system for assembling the wire inlet end on the base of the molded case circuit breaker, the middle frame and the static contact system at the other end need to be locked and attached and fixed by adopting 6 rows of 60 combined screws with flat pads and spring washers, the specifications of the screws are more, the screws need to be manually completed by 7 to 8 persons, and when the screws are locked and attached on a wiring board, a worker needs to hold an electric screwdriver or an air screwdriver in a hand and turn over the base, after the screws are placed into screw holes, manually adjust a product to enable the screws to enter the screw holes, and then lock and attach. Obviously, such operations are relatively complex and inefficient; when adopting the unipolar to beat the screw machine, the screw divides the material slowly, and the electricity is criticized or the gas is criticized and need be removed the operation repeatedly between a plurality of screw hole positions, and this is more to the screw, needs the product of different specification screws, and production efficiency is low, and the human cost is high.

In the automatic locking screw industry at present, automation is generally realized in the industry because self (triangle) easily finds the center and the screwing direction, but for the combined screw of a machine tooth belt flat cushion and a spring washer, the self is flat head at present and the technical limit is reached, and no implementation case and patent application for realizing the full-automatic locking screw exist at present through retrieval; mainly, the combined screw (the length is less than 25mm, the length-width ratio is less than 1.3, and the characteristics of the patent implementation object) with the flat cushion and the spring washer of the machine tooth does not conform to the technical limits of the length and the length-width ratio of automatic feeding, and can not realize the automatic feeding without material clamping; the manual locking is not consistent in diameter and rotation direction errors due to the fact that the machine thread screw and a threaded hole of a locking product are not consistent, locking is not consistent, the manual locking can be successful only through multiple times of locking due to the fact that locking is inconsistent, the failure rate of automatic locking is 30% -80%, secondary automatic locking cannot be achieved, and the problems that locking cannot be achieved, locking is not tight, locking is not in place and the like are mainly solved.

For the combined screw with the elastic pad and the flat pad, the existing screw chuck is easy to turn over due to the characteristics of light head and heavy feet, and the screw cannot be locked and attached due to the fact that the screw chuck turns over; the other is that the material is blocked easily due to the overlarge included angle between the feeding pipeline and the screw driver channel, the material cannot be taken out quickly after being blocked, the production efficiency is greatly reduced, and particularly, when the torsion of a screw of a base of the circuit breaker is more than 5n.m, a locked product is easy to tilt; the existing screw locking machine is easy to cause thread slipping and lock missing if the screw pressure is too large or the screwing speed of the screw is inconsistent with the pressing follow-up speed, and the screw cannot be aligned with the screw hole position if the locking space is narrow or an obstacle exists in the locking space.

The existing automatic screw locking industry generally requires part alignment, threaded hole alignment and screwdriver threaded hole alignment to be basic requirements, and the method is not difficult to lock a single screw of one part, but needs to lock a plurality of threads of a plurality of parts consisting of different parts or lock a plurality of threads on one part, and deviates beyond the tolerance of normal thread clearance, so that the threaded hole on the part and the screwdriver screw of the electric screwdriver cannot be automatically aligned, generally needs to be adjusted manually, and cannot realize automatic locking.

Disclosure of Invention

The invention provides an automatic screw locking system compatible with various molded case circuit breaker bases, which aims to solve the problems that the conventional molded case circuit breaker base screw locking device is low in automation degree, low in working efficiency, high in screw locking failure rate and incapable of being compatible with different pole products.

In order to solve the technical problems, the invention adopts the technical scheme that:

the automatic screw locking system compatible with various molded case circuit breaker bases comprises a rack table, a production line, a pressing device, a plurality of screw feeding mechanisms and a plurality of automatic screw locking mechanisms; the production line and the plurality of screw feeding mechanisms are arranged on the front side of the table top of the rack, and the plurality of automatic screw locking mechanisms are arranged on the back side of the table top of the rack;

the production line comprises a feeding conveyer belt, a positioning plate and a discharging conveyer belt; the output end of the feeding conveyer belt is connected with the inlet end of the positioning plate, and the outlet end of the positioning plate is connected with the input end of the discharging conveyer belt; a plurality of slotted hole units are arranged on the positioning plate, and each slotted hole unit consists of a plurality of slotted holes; side plates are arranged on two sides of the positioning plate, linear rails are fixed on the side plates, sliding plates are embedded on the linear rails, the linear rails and the sliding plates form a linear sliding pair, a plurality of first air cylinders are fixed on the sliding plates, and a second air cylinder is fixed on the side plate close to the feeding conveying belt; the end part of a piston rod of the second cylinder is connected with the sliding plate;

the pressing device comprises a supporting plate, a plurality of base pressing units are arranged on the supporting plate, and each base pressing unit comprises a third cylinder, a first sliding rod, a pressing block, a fixing block and a positioning clamp; the third cylinder is arranged on the upper surface of the supporting plate, and the first sliding rod, the pressing block, the fixing block and the positioning clamp are arranged on the lower surface of the supporting plate; the first sliding rod is fixed on the lower surface of the supporting plate, penetrates through the pressing block and the fixing block, and the end part of a piston rod of the third cylinder is connected with the pressing block; the positioning fixture is fixed on the lower surface of the fixing block; the pressing device is positioned right above the positioning plate; the number of the slotted hole units, the number of the base pressing units, the number of the screw feeding mechanisms and the number of the automatic screw locking mechanisms are equal and are all 6; one slot unit corresponds to one base pressing unit, one screw feeding mechanism and one automatic screw locking mechanism; be provided with 6 base in the backup pad and compress tightly the unit, be fixed with a positioning fixture on every base compresses tightly the fixed block of unit, and these 6 positioning fixtures are first positioning fixture, second positioning fixture, third positioning fixture, fourth positioning fixture, fifth positioning fixture and sixth positioning fixture in proper order in the direction from the entry end to the exit end of locating plate.

The invention has the beneficial effects that:

1. the combined screw with the flat gasket and the spring washer can be automatically locked at different positions of the molded case circuit breaker base, the locking is automatically locked at one time, the locking success rate is 100 percent, manual work is not required to be excessively participated in the whole process, the automation degree is high, and the production efficiency is greatly improved;

2. the automatic screw locking mechanism adopts the transmission mechanism with the 2-level universal joint and the screw chuck which can automatically align the screw, thereby realizing the purposes of automatically aligning the screw to the locking hole, automatically increasing the rotating torque of the screwdriver and automatically locking the screw; the industrial problems that the locking is difficult to successfully lock due to the fact that the locking, the diameter and the screwing direction of the screw and the threaded hole are inconsistent and the torsion force cannot meet resistance are solved, the locking of the screw is more accurate, and the probability of locking failure is greatly reduced;

3. the production system can be compatible with screw locking of a 4P molded case circuit breaker base, a 3P molded case circuit breaker base and a 2P molded case circuit breaker base;

4. when the screw feeding mechanism is used, the screws are only needed to be placed in the screw feeding mechanism, the screws can be automatically conveyed to the screw chucks through the distribution of the screw distributing mechanism in multiple paths, the screw chucks lock the screws on products under the action of the locking mechanism, and manual participation is not needed in the whole process.

Drawings

Fig. 1 is a schematic structural view of a 4P molded case circuit breaker base;

fig. 2 is a schematic structural view of a base of a 3P molded case circuit breaker;

fig. 3 is a schematic structural view of a base of a 2P molded case circuit breaker;

fig. 4 is a schematic structural view of a base hole on a base of the molded case circuit breaker and a threaded hole on a part product;

fig. 5 is a schematic diagram of the overall structure of the automatic screw locking system compatible with various molded case circuit breaker bases according to the present invention;

FIG. 6 is a schematic view of the construction of the production line, hold-down device and multiple automatic screw locking mechanisms of the present invention;

FIG. 7 is a schematic view of the positioning plate of the present invention;

FIG. 8 is a schematic view of the construction of the first cylinder of the present invention;

FIG. 9 is a schematic view of the construction of the compacting apparatus of the present invention;

FIG. 10 is a schematic view of a fifth positioning jig of the present invention;

FIG. 11 is a schematic view of the first positioning fixture or the third positioning fixture of the present invention;

FIG. 12 is a schematic structural view of a second positioning fixture, a fourth positioning fixture or a sixth positioning fixture of the present invention;

FIG. 13 is a schematic structural view of the screw feeding mechanism of the present invention;

FIG. 14 is a schematic structural view of a distributor of the screw feeding mechanism of the present invention;

FIG. 15 is a schematic view of the structure of the pusher block of the screw feeding mechanism of the present invention;

FIG. 16 is a schematic structural diagram of a first pipe, a second pipe, a third pipe, a cross and a T-shaped block in the screw feeding mechanism of the present invention;

FIG. 17 is a schematic structural view of a first automatic screw locking mechanism of the present invention;

FIG. 18 is a schematic structural view of a second automatic screw locking mechanism of the present invention;

FIG. 19 is a schematic structural view of a third automatic screw locking mechanism of the present invention;

FIG. 20 is a schematic structural view of a second slide rod, a sixth cylinder, a first double ball bearing and a second double ball bearing of the automatic screw locking mechanism of the present invention;

FIG. 21 is a schematic structural view of the telescopic rod and the first shaft sleeve of the automatic screw locking mechanism of the present invention;

FIG. 22 is a schematic structural view of a second support plate, a second sleeve and a driver of the automatic screw locking mechanism of the present invention;

FIG. 23 is a schematic view of the construction of the screw driver chuck of the present invention;

FIG. 24 is a schematic structural view of the base and feed body of the screw driver chuck of the present invention;

FIG. 25 is a schematic view of the screw feeding member of the screw cartridge of the present invention;

FIG. 26 is a schematic view of a screw clamp of the present invention;

FIG. 27 is a schematic structural view of 4 first automatic screw-locking mechanisms, 1 second automatic screw-locking mechanism and 1 third automatic screw-locking mechanism arranged on the back of the table top of the rack according to the present invention.

Detailed Description

The invention provides an automatic screw locking system compatible with various molded case circuit breaker bases, and aims to fix the molded case circuit breaker bases and part products assembled on the molded case circuit breaker bases together through screw locking, wherein the part products are assembled in polar grooves of the molded case circuit breaker bases, and the assembled part products comprise static contacts, a conductive system, a rack, a thermal element and a bimetal part. The device disclosed by the invention can be compatible with the locking of the 4P molded case circuit breaker base 18 and a part product, the locking of the 3P molded case circuit breaker base 19 and the part product, and the locking of the 2P molded case circuit breaker base 20 and the part product.

Be provided with a plurality of base holes 17 on the moulded case circuit breaker base, be provided with a plurality of screw holes 16 on the part product, base hole 17 equals with screw hole 16's figure, both one-to-one, and base hole 17 coincides with screw hole 16's axis, and base hole 17 link up with screw hole 16 and constitutes the lock and attach the hole. As shown in fig. 4, the base bore 17 is comprised of a counterbore 1701 and a via 1702, which are in communication, with the central axes of the counterbore 1701 and the via 1702 coinciding. The threaded hole 16 is composed of an inner inclined threaded hole 1601 and a straight threaded hole 1602, which are communicated with each other, and the central axis of the inner inclined threaded hole 1601 coincides with the central axis of the straight threaded hole 1602.

As shown in fig. 1, the 4P molded case circuit breaker base 18 assembled with the component product is provided with a first incoming screw lower hole group 1801, a first stationary contact screw lower hole group 1802, a first rack screw lower hole group 1803, a first conductive system hot element screw lower hole group 1804, a first conductive dual-gold screw lower hole group 1805, and a first outgoing screw lower hole group 1806 in this order from top to bottom. The first inlet screw lower hole group 1801 is composed of 4 locking holes, the first stationary contact screw lower hole group 1802 is composed of 8 locking holes, the first frame screw lower hole group 1803 is composed of 2 locking holes, the first conductive system thermal element screw lower hole group 1804 is composed of 4 locking holes, the first conductive dual-gold screw lower hole group 1805 is composed of 8 locking holes, and the first outlet screw lower hole group 1806 is composed of 4 locking holes. Two ends of the 4P molded case circuit breaker base 18 are also respectively provided with 3

first positioning holes

1807 and 3 second positioning holes 1808; in 8 locking holes of the first lower fixed contact screw hole group 1802, every 2 locking holes form a group, and 1 first positioning hole 1807 is arranged between every two adjacent groups; in 8 locking holes of the first conductive double-gold screw lower hole group 1805, every 2 locking holes form a group, and 1 second positioning hole 1808 is arranged between every two adjacent groups; the bottom of the 4P molded case circuit breaker base 18 is provided with 4 first pole slots 1809, and the part product is assembled in the 4 first pole slots 1809.

As shown in fig. 2, the 3P molded case circuit breaker base 19 equipped with component products is provided with a second incoming screw lower hole group 1901, a second fixed contact screw lower hole group 1902, a second rack screw lower hole group 1903, a second conductive system thermoelement screw lower hole group 1904, a second conductive bimetallic screw lower hole group 1905 and a second outgoing screw lower hole group 1906 in sequence from top to bottom. The second lower hole group 1901 for incoming screws is composed of 3 locking holes, the second lower hole group 1902 for stationary contacts is composed of 6 locking holes, the second lower hole group 1903 for rack screws is composed of 2 locking holes, the second lower hole group 1904 for thermal elements of the second conductive system is composed of 3 locking holes, the second lower hole group 1905 for conductive double-gold screws is composed of 6 locking holes, and the second lower hole group 1906 for outgoing screws is composed of 3 locking holes. Two third positioning holes 1907 and two fourth positioning holes 1908 are further formed in two ends of the 3P molded case circuit breaker base 19; in the 6 locking holes of the second lower fixed contact screw hole group 1902, every 2 locking holes form one group, and 1 third positioning hole 1907 is arranged between two adjacent groups; in the 6 locking holes of the second conductive double-gold screw lower hole group 1905, every 2 locking holes form a group, and 1 fourth positioning hole 1908 is arranged between two adjacent groups; the bottom of the 3P molded case circuit breaker base 19 is provided with 3 second pole slots 1909, and the part product is assembled in the 3 second pole slots 1909.

As shown in fig. 3, the 2P molded case circuit breaker base 20 assembled with the component product is provided with a third incoming screw lower hole group 2001, a third stationary contact screw lower hole group 2002, a third rack screw lower hole group 2003, a third conductive system thermoelement screw lower hole group 2004, a third conductive bimetallic screw lower hole group 2005, and a third outgoing screw lower hole group 2006 in this order from top to bottom. The third inlet screw lower hole group 2001 is composed of 2 locking holes, the third stationary contact screw lower hole group 2002 is composed of 4 locking holes, the third rack screw lower hole group 2003 is composed of 2 locking holes, the third conductive system thermal element screw lower hole group 2004 is composed of 2 locking holes, the third conductive bimetallic screw lower hole group 2005 is composed of 4 locking holes, and the third outlet screw lower hole group 2006 is composed of 2 locking holes. Two ends of the 2P molded case circuit breaker base 20 are further provided with 1 fifth positioning hole 2007 and 1 sixth positioning hole 2008, respectively; in the 4 locking holes of the third stationary contact screw lower hole group 2002, every 2 locking holes form one group, and 1 fifth positioning hole 2007 is arranged between every two adjacent groups; in 4 locking holes of the third conductive double-gold screw lower hole group 2005, every 2 locking holes form one group, and 1 sixth positioning hole 2008 is arranged between two adjacent groups; the bottom of the 2P molded case circuit breaker base 20 is provided with 2 third pole slots 2009, and the part product is assembled in the 2 third pole slots 2009.

As shown in fig. 5, the present invention provides an automatic screw locking system compatible with various molded case circuit breaker bases, comprising a rack table 1, a production line, a pressing device 5, a plurality of screw feeding mechanisms 6 and a plurality of automatic screw locking mechanisms 7; the production line and a plurality of screw feeding mechanisms 6 are arranged on the front surface of the rack table board 1, and a plurality of automatic screw locking mechanisms 7 are arranged on the back surface of the rack table board 1.

As shown in fig. 6, the production line comprises a feeding conveyer belt 2, a positioning plate 3 and a discharging conveyer belt 4; the output end of the feeding conveyer belt 2 is connected with the inlet end of the positioning plate 3, and the outlet end of the positioning plate 3 is connected with the input end of the discharging conveyer belt 4. As shown in FIG. 7, the positioning plate 3 is provided with a plurality of slot units 3-1, each slot unit 3-1 is composed of a plurality of slots 3-2; two sides of the positioning plate 3 are provided with side plates 901, a linear rail 902 is fixed on the side plates 901, a sliding plate 903 is embedded on the linear rail 902, the linear rail 902 and the sliding plate 903 form a linear sliding pair, a plurality of first cylinders 904 are fixed on the sliding plate 903, and a second cylinder 906 is fixed on the side plate 901 close to the feeding conveyor belt 2; the end of the piston rod of the second cylinder 906 is connected to the sliding plate 903. As shown in fig. 8, a latch 905 is fixed to the end of the piston rod of each first cylinder 904.

As shown in fig. 9, the pressing device 5 includes a supporting plate 501, a plurality of base pressing units are disposed on the supporting plate 501, and each base pressing unit includes a third cylinder 502, a first sliding rod 503, a pressing block 504, a fixing block 505, and a positioning clamp; the third cylinder 502 is arranged on the upper surface of the supporting plate 501, and the first sliding rod 503, the pressing block 504, the fixing block 505 and the positioning clamp are arranged on the lower surface of the supporting plate 501; the first sliding rod 503 is fixed on the lower surface of the supporting plate 501, the first sliding rod 503 passes through the pressing block 504 and the fixing block 505, and the end of the piston rod of the third cylinder 502 is connected with the pressing block 504; the positioning jig is fixed to the lower surface of the fixing block 505.

The pressing device 5 is positioned right above the positioning plate 3; the number of the slotted hole units 3-1, the number of the base pressing units, the number of the screw feeding mechanisms 6 and the number of the automatic screw locking mechanisms 7 are equal, and one slotted hole unit 3-1 corresponds to one base pressing unit, one screw feeding mechanism 6 and one automatic screw locking mechanism 7.

As shown in fig. 13, the screw feeding mechanism 6 includes a vibrating plate 601, a straight vibrator 602, and a distributor 603; as shown in fig. 14, the distributor 603 includes a frame 616, a fourth cylinder 604, a fifth cylinder 605, a U-shaped channel rack 606, a pusher block 607, a T-shaped block 608, and a plurality of first conduits 609; the fourth cylinder 604, the fifth cylinder 605 and the U-shaped trough frame 606 are arranged on the frame 616; the U-shaped slot frame 606 is composed of a first side wall, a second side wall and a bottom wall, the first side wall and the second side wall are arranged oppositely, a plurality of straight notches 612 are formed in the first side wall, the first side wall is connected with the straight vibrator 602, and a plurality of first through holes and a baffle capable of translating are formed in the bottom wall of the U-shaped slot frame 606; the material pushing block 607 is embedded in the U-shaped slot rack 606, as shown in fig. 15, a plurality of grooves 613 are formed in the material pushing block 607, and one side of the material pushing block 607 close to the second side wall of the U-shaped slot rack 606 is a closed surface; a piston rod of the fourth cylinder 604 is connected with a material pushing block 607; a plurality of first pipelines 609 are arranged below the U-shaped trough rack 606, the upper end of each first pipeline 609 is communicated and connected with a first through hole, and the lower end of each first pipeline 609 is connected with a cross 614; as shown in FIG. 16, the first port of the cross-over 614 is connected to the lower end of the first conduit 609, the second port is connected to the rear end of the second conduit 610, and the third port is connected to the rear end of the third conduit 611; the upper surface of the T-block 608 has a plurality of plugs 615, each plug 615 plugged into a fourth port of a cross 614; the piston rod of the fifth cylinder 605 is connected with the T-shaped block 608; the number of straight slots 612, the number of grooves 613, the number of first through holes, the number of first ducts 609, the number of cross-ways 614 and the number of plugs 615 are equal; the front end of the second pipe 610 is connected to the screw feed pipe 1407 of the screw clamping head 14, and one second pipe 610 is connected to only one screw feed pipe 1407; the front end of the third pipe 611 is connected with an air blowing port of the electromagnetic valve.

The initial state of the distributor 603 is: the grooves 613 on the pushing block 607 are in one-to-one butt joint with the straight notches 612 on the U-shaped groove rack 606, the first through hole on the bottom wall of the U-shaped groove rack 606 is blocked by the baffle, and the plug 615 on the T-shaped block 608 is blocked in the fourth port of the cross 614. The working principle of the screw feeding mechanism 6 is as follows: a plurality of screws 10 are placed in a vibration disc 601, the vibration disc 601 rotates to enable all the screws 10 to be orderly arranged, the screws 10 are conveyed to the first side wall of the U-shaped groove frame 606 through a straight vibration 602, the plurality of screws 10 are orderly divided into multiple paths on the straight vibration 602, and one path of screw 10 corresponds to one straight notch 612; screws 10 pass through slots 612 into grooves 613, each groove 613 receiving only one screw 10 therein; then the piston rod of the fourth cylinder 604 pushes the material pushing block 607 to move forward linearly until the groove 613 of the material pushing block 607 is positioned right above the first through hole in the bottom wall of the U-shaped slot frame 606, and the grooves 613 correspond to the first through holes one to one, then the baffle plate translates to open the first through hole, and the screw 10 in the groove 613 falls into the first pipeline 609 from the through hole; because the plug 615 on the T-block 608 is blocked in the fourth port of the cross 614, the blow port of the solenoid blows the screw 10 into the second conduit 610 and eventually into the screw feed tube 1407 of the screw chuck 14. Only one screw 10 can be accommodated in one screw chuck 14, when one screw 10 is blown into the screw chuck 14, a sensor in the screw chuck 14 gives a signal to the controller, and the controller controls the push rod of the fifth air cylinder 605 to push the T-shaped block 608 upwards, so that the plug 615 on the T-shaped block 608 is plugged in the first port of the four-way valve 614, the first pipeline 609 is plugged, and more screws 10 are prevented from falling into the screw chuck 14 to cause material blocking.

The number of the straight groove openings 612, the number of the grooves 613, the number of the first through holes, the number of the first pipelines 609, the number of the four-way joints 614 and the number of the plugs 615 of the screw feeding mechanism 6 are equal to N; the plurality of screw feeding mechanisms 6 of the present invention are different only in the value of N, and other structures are the same, which are not described herein.

As shown in fig. 17, 18 and 19, the automatic screw locking mechanism 7 includes a sixth air cylinder 703, a seventh air cylinder 707, a plurality of locking mechanisms, a plurality of screw chucks 14 and a support bracket; the supporting frame comprises a plurality of second sliding rods 701, a base 724, a first supporting plate 704 and a second supporting plate 706; as shown in fig. 20, a plurality of second slide bars 701 are fixed on a base 724, and each second slide bar 701 is provided with a first double ball bearing 722 and a second double ball bearing 723; a supporting plate 702 is fixed at the lower ends of the second sliding rods 701, and a sixth air cylinder 703 is arranged on the supporting plate 702; the first double ball bearing 722 is fixedly connected with the first supporting plate 704, and the piston rod of the sixth air cylinder 703 is connected with the first supporting plate 704; a cross frame 705 is fixed in the middle of the second sliding rods 701, the cross frame 705 is positioned between a first double ball bearing 722 and a second double ball bearing 723, and a seventh air cylinder 707 is arranged on the cross frame 705; the second double ball bearing 723 is fixedly connected with the second support plate 706, and a piston rod of the seventh cylinder 707 is connected with the second support plate 706; the locking mechanism comprises an electric screwdriver 708, a transmission mechanism and a screwdriver 715; the electric screwdriver 708 penetrates through the first supporting plate 704 and is clamped on the first supporting plate 704; the transmission mechanism comprises a first universal joint 709, a telescopic shaft 713, a first shaft sleeve 711, a connecting rod 714, a second universal joint 710 and a second shaft sleeve 712, wherein a rotating shaft of the electric screwdriver 708 is connected with the lower end of the telescopic shaft 713 through the first universal joint 709, as shown in fig. 21, the upper end of the telescopic shaft 713 is inserted into the first shaft sleeve 711, a first waist-shaped hole 717 is formed in the first shaft sleeve 711, and a first pin 716 penetrates through the upper end of the telescopic shaft 713 and the first waist-shaped hole 717; a tenth spring 726 is sleeved on the telescopic shaft 713 between the first universal joint 709 and the first shaft sleeve 711; a connecting rod 714 is fixed at the upper end of the first shaft sleeve 711, the connecting rod 714 is connected with the lower end of the second shaft sleeve 712 through a second universal joint 710, the second shaft sleeve 712 passes through the second support plate 706, as shown in fig. 22, a sliding sleeve 718 is arranged between the second shaft sleeve 712 and the second support plate 706, the sliding sleeve 718 is fixed on the second support plate 706, the handle of the screwdriver 715 is positioned in the second shaft sleeve 712, a second waist-shaped hole 725 is arranged on the second shaft sleeve 712, a second pin 719 passes through the second waist-shaped hole 725 and the handle of the screwdriver 715, an eleventh spring 727 is sleeved on the rod part of the screwdriver 715 between the handle of the screwdriver 715 and the top of the second shaft sleeve 712, and the second pin 719 is positioned above; a third pin 720 penetrates through the rod part of the screwdriver 715, the third pin 720 is positioned above the second bushing 712, and the third pin 720 abuts against the upper surface of the second bushing 712; the second hinge pin 719 and the third hinge pin 720 are in a cross-shaped structure; a fixing plate 721 is further fixed to the upper surface of the second support plate 706, and a plurality of screw chucks 14 are fixed to the fixing plate 721.

The automatic screw locking mechanisms 7 are arranged on the back of the rack table board 1 in a straight line shape, the automatic screw locking mechanisms 7 are fixed on the back of the rack table board 1 through a base 724, the screwdriver 708 faces downwards, and the screw clamping heads 14 face upwards.

As shown in fig. 23, the screw cartridge 14 includes a base 1401, a body 1402, a screw feeder 1403 and two screw clamps 1404; as shown in fig. 24, the base 1401 includes four sides, that is, a first side, a second side, a third side, and a fourth side, the first side and the third side being disposed opposite to each other, and the second side and the fourth side being disposed opposite to each other; the feed body 1402 is disposed on the first side or the third side of the substrate 1401; a first inverted U-shaped groove 1405 is formed in the second side face of the base 1401, and a second inverted U-shaped groove is formed in the fourth side face of the base 1401; a second through hole 1406 is further arranged on the base 1401, and the second through hole 1406 is arranged longitudinally; the feeding body 1402 is provided with a screw feeding pipe 1407, a third through hole 1408 is arranged in the feeding body 1402, and a third inverted U-shaped groove 1409 is arranged on the side surface; as shown in fig. 25, the screw feeding member 1403 is composed of a first connecting head 1410 and a pipe body 1411, which are of an integral structure; the first connecting head 1410 is embedded in the third inverted U-shaped groove 1409, a fourth pin shaft 1412 penetrates through the first connecting head 1410, and two ends of the fourth pin shaft 1412 are fixed on the feeding body 1402; wherein, the screw feed pipe 1407 and the third through hole 1408 are communicated with the pipe body 1411; as shown in fig. 26, the screw clamp 1404 comprises a second connector 1413, a transition portion 1414 and a collet 1415, which are integrated into a single structure; a step 1416 is arranged on the transition part 1414, and an arc-shaped groove 1417 is arranged on the clamping head 1415; the second connectors 1413 of the two screw clamps 1404 are respectively embedded in the first inverted-U-shaped groove 1405 and the second inverted-U-shaped groove, a fifth pin 1418 penetrates through the second connector 1413 of each screw clamp 1404, two ends of the fifth pin 1418 are fixed on the substrate 1401, and the two screw clamps 1404 are arranged oppositely; the clamping heads 1415 of the two screw clamping pieces 1404 are positioned below the base 1401, and the arc-shaped grooves 1417 of the two oppositely-arranged clamping heads 1415 form a circular caliber; the arc-shaped groove 1417 consists of an inlet straight section 1419, a transition inclined section 1420 and an outlet straight section 1421; the caliber formed by the inlet straight sections 1419 of the two arc-shaped grooves 1417 is larger than the caliber formed by the outlet straight sections 1421 of the two arc-shaped grooves 1417; the end of the tube 1411 is opposite the circular aperture defined by the two arcuate grooves 1417 and the second aperture 1406 communicates with the circular aperture.

The number of the locking mechanisms is equal to that of the screw chucks 14, and one locking mechanism corresponds to one screw chuck 14; the bit of a driver 715 is aligned with a second through-hole 1406 of a screwdriver head 14; the screw feed tube 1407 of a screw cartridge 14 is connected to the front end of a second tube 610.

The working principle of the automatic screw locking system compatible with the 2P/3P/4P molded case circuit breaker base is as follows: the 2P/3P/4P molded case circuit breaker base with the assembled part product is conveyed to the inlet end of a positioning plate 3 by a feeding conveyor belt 2, piston rods of a first pair of first cylinders 904 which are positioned at the inlet end of the positioning plate 3 and oppositely arranged extend out, clamping blocks 905 on the piston rods support the front side and the rear side of the molded case circuit breaker base to clamp the molded case circuit breaker base, the piston rod of a second cylinder 906 extends out to push a sliding plate 903 forwards, the first cylinder 904 and the clamped molded case circuit breaker base move forwards, the molded case circuit breaker base is moved to a first slotted hole unit 3-1 (the polar groove of the molded case circuit breaker base faces upwards), then the piston rod of the first cylinder 904 retracts, and the molded case circuit breaker base is; then, a piston rod of a first third air cylinder 502 in the direction from the feeding conveyer belt 2 to the discharging conveyer belt 4 extends out of a downward pushing block 504, the pressing block 504 presses a fixing block 505 and a positioning clamp downwards to enable the positioning clamp to be matched with a base of the molded case circuit breaker, then a screw feeding mechanism 6 and an automatic screw locking mechanism 7 corresponding to a first slotted hole unit 3-1 start to work, the screw feeding mechanism 6 supplies screws 10 to the automatic screw locking mechanism 7, a plurality of screws 10 are conveyed to a distributor 603 by a direct vibration 602, the screws 10 fall into a first pipeline 609, an air blowing opening of an electromagnetic valve blows air to blow the screws 10 into screw feeding pipes 1407 of screw chucks 14, and then the automatic screw locking mechanism 7 performs screw locking on a part of locking holes on the base of the molded case circuit breaker equipped with part products; after the first locking, the piston rod of the first third cylinder 502 retracts, the press block 504, the fixed block 505 and the positioning fixture reset to the initial position, meanwhile, the piston rod of the second cylinder 906 retracts to pull the sliding plate 903 backwards, so that the second pair of first cylinders 904 face the base of the molded case circuit breaker, the piston rods of the second pair of first cylinders 904 extend out, the clamping blocks 905 on the piston rods clamp the base of the molded case circuit breaker, then the piston rod of the second cylinder 906 extends out to push the sliding plate 903 forwards, so that the base of the molded case circuit breaker is moved to the second slot unit 3-1, then the piston rods of the second pair of first cylinders 904 retract, and the base of the molded case circuit breaker is loosened; then, the piston rod of the second third cylinder 502 extends out of the downward pushing block 504, the pressing block 504 presses the fixing block 505 and the positioning clamp downward, so that the positioning clamp is fitted with the base of the molded case circuit breaker, then the screw feeding mechanism 6 and the automatic screw locking mechanism 7 corresponding to the second slot unit 3-1 start to work, the screw feeding mechanism 6 supplies screws 10 to the automatic screw locking mechanism 7, the automatic screw locking mechanism 7 performs screw locking on another part of locking holes on the base of the molded case circuit breaker, the second locking work is completed, after the second locking work is completed, the piston rod of the second third cylinder 502 retracts, and the pressing block 504, the fixing block 505 and the positioning clamp reset to the initial positions; the above processes are repeated until the locking holes needing to be locked on the base of the molded case circuit breaker are locked by the screws, and then the molded case circuit breaker is sent out by the discharging conveyer belt 4.

The method for automatically locking the screw in the locking hole by the automatic screw locking mechanism 7 comprises the following steps:

1. when a certain pair of first air cylinders 904 clamp a molded case circuit breaker base with an assembled part product and move to a certain slot hole unit 3-1, a base pressing unit corresponding to the slot hole unit 3-1 works, and a third air cylinder 502 starts to press a positioning clamp downwards to ensure that the positioning clamp is matched with the molded case circuit breaker base; then the screw feeding mechanism 6 and the automatic screw locking mechanism 7 corresponding to the slotted hole unit 3-1 start to work; a plurality of screws 10 are conveyed to the distributor 603 by a direct vibration 602, the screws 10 fall into a first pipeline 609, an air blowing port of an electromagnetic valve blows air, the screws 10 are blown into a screw feeding pipe 1407 of a screw clamp 14, the screws 10 sequentially pass through a third through hole 1408 and a pipe body 1411, and the screws 10 fall into a circular caliber formed by arc-shaped grooves 1417 of two screw clamps 1404;

2. when the sixth air cylinder 703 of the automatic screw locking mechanism 7 works, a push rod of the sixth air cylinder 703 extends out to push the first support plate 704 upwards, the first double ball bearing 722 moves upwards along the second slide bar 701, the first double ball bearing 722 drives the first support plate 704 and the screwdriver 708 arranged on the first support plate 704 to move upwards, the screwdriver 715 is driven by the screwdriver 708 through the transmission mechanism to move upwards, a bit of the screwdriver 715 is inserted into the second through hole 1406 of the screwdriver head 14 and penetrates into the inlet straight section 1419 and the transition inclined section 1420 of the two arc-shaped grooves 1417, then the sixth air cylinder 703 stops working, the screwdriver 715 stops moving upwards, the rotating shaft of the screwdriver 708 rotates anticlockwise, the torsion is transmitted to the rod part of the screwdriver 715 through the first universal joint 709, the telescopic shaft 713, the first sleeve 711, the connecting rod 714, the second universal joint 710, the second sleeve 712 and the third pin 720 in sequence to drive the screwdriver 715 to rotate anticlockwise, in the process of anticlockwise rotating of the screw driver 715, the head of the screw driver 715 finds the cross groove at the head of the screw 10 and is matched with the cross groove, after the two are matched, the screw driver 715 drives the screw 10 to anticlockwise rotate, the screw 10 automatically aligns and adjusts the position in a circular caliber formed by the arc-shaped grooves 1417 in the process of anticlockwise rotating, finally, a screw rod of the screw 10 is inserted into a caliber formed by the two outlet straight sections 1421, and the central axis of the screw 10, the central axis of the screw driver 715 and the central axes of the circular calibers formed by the two arc-shaped grooves 1417 coincide; since the step 1416 is provided on the transition portion 1414 of the screw clamp 1404, the screw 10 can be prevented from bouncing to the second through hole 1406;

in the above process, when the sixth air cylinder 703 stops working, the first support plate 704 stops pressing the screwdriver 708 upwards, and the rotating shaft of the screwdriver 708 transmits a counterclockwise torque force to the screwdriver 715 through the transmission mechanism, the pressure applied to the tenth spring 726 sleeved on the telescopic shaft 713 is unchanged, and the rotating torque force transmitted by the tenth spring 726 is also unchanged;

3. after the central axes of the screw 10 and the driver 715 coincide with the central axes of the circular calibers formed by the two arc-shaped grooves 1417, the sixth air cylinder 703 is restarted, the upper pressure and the torque force are transmitted to the driver 715 through the transmission mechanism, the driver 715 continuously moves upwards while rotating anticlockwise, the screw 10 is pushed upwards, the screw head 14 is exposed at the upper end of the screw 10, the upper end of the screw 10 firstly passes through the slotted hole 3-2 along with the continuous upward rotation of the screw 10, then sequentially passes through the counter bore 1701 and the through hole 1702 on the base of the molded case circuit breaker and reaches the internally inclined threaded hole 1601 of the part product, the driver 715 drives the screw 10 to rotate anticlockwise in the internally inclined threaded hole 1601, the screw 10 automatically aligns and adjusts the position in the anticlockwise rotation process, so that the central axes of the screw 10 and the driver 715 coincide with the central axis of; at this time, the screw 10 is completely ejected out of the screw chuck 14, when the head of the screw 10 passes through the caliber formed by the two exit straight sections 1421, the head of the screw 10 pushes the exit straight sections 1421 of the two chucks 1415 outwards, and the screw clamp 1404 rotates around the fifth pin 1418, so that the head of the screw 10 passes through the caliber formed by the two exit straight sections 1421 completely;

4. after the central axis of the screw 10 and the central axis of the screw driver 715 coincide with the central axis of the threaded hole 16, the rotating shaft of the screwdriver 708 rotates clockwise again, the screw driver 715 is driven by the transmission mechanism to rotate clockwise and upwards, the screw driver 715 drives the screw 10 to rotate clockwise in the inner oblique threaded hole 1601, the screw 10 enters the opening of the straight threaded hole 1602, and then the thread on the screw 10 is engaged with the thread in the straight threaded hole 1602;

5. after the threads on the screw 10 are engaged with the threads in the straight threaded hole 1602, the rotating shaft of the screwdriver 708 continues to rotate clockwise, and the sixth cylinder 703 continues to press the screwdriver 715 upwards through the transmission mechanism, so as to drive the screwdriver 715 to rotate clockwise into the straight threaded hole 1602; when the rotating shaft of the electric screwdriver 708 transmits clockwise rotating torsion to the screwdriver 715 through the transmission mechanism, the tenth spring 726 compresses to receive the feeding pressure, and the tenth spring 726 increases the rotating torsion by 10-20% according to the compression ratio of the tenth spring 726; the rotation torsion of the screw driver 715 and the rotation torsion increased by the tenth spring 726 are added, so that the feeding torsion of the screw rod of the screw 10 screwed into the straight threaded hole 1602 is large enough, the screw 10 can complete all screw threads, and the seventh cylinder 707 does not work; if the rotating torque force of the screwdriver 715 and the rotating torque force increased by the tenth spring 726 are not enough to overcome the locking resistance, the seventh cylinder 707 is started while the sixth cylinder 703 is working, the piston rod of the seventh cylinder 707 extends to push the second support plate 706 upwards, the second double ball bearing 723 moves upwards along the second sliding rod 701, the second support plate 706 presses the second pin 719 upwards, the second pin 719 presses the handle of the screwdriver 715 upwards along the second waist-shaped hole 725, the eleventh spring 727 is compressed by the feeding pressure, and the rotating torque force is increased by 15-30% by the eleventh spring 727 according to the compression ratio of the eleventh spring 727; under the common driving of the rotating shaft of the electric screwdriver 708, the sixth air cylinder 703 and the seventh air cylinder 707 and the common assistance of the tenth spring 726 and the eleventh spring 727, the screwdriver 715 has enough rotating torque to overcome the locking resistance, and at this time, the screwdriver 715 is screwed into the straight threaded hole 1602 clockwise until the screw 10 runs through all the screw threads; then the rotation shafts of the sixth cylinder 703, the seventh cylinder 707 and the electric screwdriver 708 stop working, and the whole automatic locking work is completed;

6. finally, the piston rods of the sixth cylinder 703 and the seventh cylinder 707 retract, which brings the screwdriver 708, the transmission mechanism and the screwdriver 715 back to the initial position.

By the method, the automatic screw locking mechanism 7 controls the screw 10 to sequentially pass through the counter bore 1701, the through hole 1702, the inner inclined threaded hole 1601 and finally to be screwed into the straight threaded hole 1602, so that the molded case circuit breaker base and the part product assembled on the molded case circuit breaker base are fixed together. The automatic screw locking mechanism 7 of the invention utilizes the 2-level universal joint and the automatically adjustable screw chuck, and can overcome the industrial problems that the automatic locking of the combined screw is difficult to realize due to the inconsistent locking, diameter and screwing direction and insufficient torsion of the screw and the threaded hole in the screw locking.

Preferably, the number of the slotted hole units 3-1, the number of the base pressing units, the number of the screw feeding mechanisms 6 and the number of the automatic screw locking mechanisms 7 are all 6, and the four correspond to one another.

As shown in fig. 9, the supporting plate 501 is provided with 6 base pressing units, and a positioning fixture is fixed on the fixing block 505 of each base pressing unit, and the 6 positioning fixtures are a first positioning fixture 801, a second positioning fixture 802, a third positioning fixture 803, a fourth positioning fixture 804, a fifth positioning fixture 805 and a sixth positioning fixture 806 in sequence from the inlet end to the outlet end of the positioning plate 3.

As shown in fig. 10, the fifth positioning jig 805 has a structure in which: the multifunctional folding bicycle comprises a first bottom plate 2101 and 4 first buckling units, wherein the 4 first buckling units are arranged on the first bottom plate 2101 in parallel; each of the first fastening units includes a first boss 2102, a second boss 2103 and a third boss 2104, the first boss 2102 and the second boss 2103 are disposed at one end of the first base 2101, and the third boss 2104 is disposed at the other end of the first base 2101; a groove 2113 is formed between two adjacent first buckling units; the first base plate 2101 is further provided with a first fixing hole 2112, the fifth positioning fixture 805 is fixed on the lower surface of the fixing block 505 corresponding to the first base plate 2101 through the first fixing hole 2112, and the first boss 2102, the second boss 2103 and the third boss 2104 face downward; the lower surface of each first boss 2102 is provided with a first groove and two second grooves; a first positioning pin 2105 is arranged in the first groove, the upper part of the first positioning pin 2105 is positioned in the first groove, and a first spring is arranged between the top of the first positioning pin 2105 and the bottom of the first groove; a second positioning pin 2106 is arranged in each second groove, the upper part of each second positioning pin 2106 is positioned in each second groove, and a second spring is arranged between the top of each second positioning pin 2106 and the bottom of each second groove; a third groove is formed in the lower surface of each second boss 2103, a third positioning pin 2107 is arranged in each third groove, the upper portion of each third positioning pin 2107 is located in each third groove, and a third spring is arranged between the top of each third positioning pin 2107 and the bottom of each third groove; the lower surface of each third boss 2104 is provided with a fourth groove and two fifth grooves; a fourth positioning pin 2108 is arranged in the fourth groove, the upper part of the fourth positioning pin 2108 is positioned in the fourth groove, and a fourth spring is arranged between the top of the fourth positioning pin 2108 and the bottom of the fourth groove; a fifth positioning pin 2109 is arranged in each fifth groove, the upper part of the fifth positioning pin 2109 is positioned in the fifth groove, and a fifth spring is arranged between the top of the fifth positioning pin 2109 and the bottom of the fifth groove; in addition, a first positioning post 2110 and a second positioning post 2111 are disposed in one of the grooves 2113, and the first positioning post 2110 and the second positioning post 2111 are respectively disposed at two ends of the first base 2101.

As shown in fig. 11 and 12, the first positioning jig 801, the second positioning jig 802, the third positioning jig 803, the fourth positioning jig 804, or the sixth positioning jig 806 has a structure in which: the folding table comprises a second bottom plate 2201 and 1 second buckling unit, wherein the second buckling unit is arranged on the second bottom plate 2201; the second buckling unit comprises a fourth boss 2202 and a fifth boss 2203, and the fourth boss 2202 and the fifth boss 2203 are respectively arranged at two ends of the second base plate 2201; the second bottom plate 2201 is further provided with a second fixing hole 2210, the first positioning clamp 801, the second positioning clamp 802, the third positioning clamp 803, the fourth positioning clamp 804 or the sixth positioning clamp 806 are fixed on the lower surface of the fixing block 505 corresponding to the first positioning clamp 802 through the second fixing hole 2210, and the fourth boss 2202 and the fifth boss 2203 face downwards; the lower surface of the fourth boss 2202 is provided with a sixth groove and two seventh grooves; a sixth positioning pin 2204 is arranged in the sixth groove, the upper part of the sixth positioning pin 2204 is positioned in the sixth groove, and a sixth spring is arranged between the top of the sixth positioning pin 2204 and the bottom of the sixth groove; a seventh positioning pin 2205 is arranged in each seventh groove, the upper part of the seventh positioning pin 2205 is positioned in the seventh groove, and a seventh spring is arranged between the top of the seventh positioning pin 2205 and the bottom of the seventh groove; the lower surface of the fifth boss 2203 is provided with an eighth groove and two ninth grooves; an eighth positioning pin 2206 is arranged in the eighth groove, the upper part of the eighth positioning pin 2206 is positioned in the eighth groove, and an eighth spring is arranged between the top of the eighth positioning pin 2206 and the bottom of the eighth groove; a ninth positioning pin 2207 is arranged in each ninth groove, the upper part of the ninth positioning pin 2207 is positioned in the ninth groove, and a ninth spring is arranged between the top of the ninth positioning pin 2207 and the bottom of the ninth groove; a third positioning column 2208 and a fourth positioning column 2209 are further disposed on the second base plate 2201, the third positioning column 2208 is located on one side of the fourth boss 2202, and the fourth positioning column 2209 is located on one side of the fifth boss 2203.

Further, as shown in fig. 9 and 11, the third positioning column 2208 and the fourth positioning column 2209 of the first positioning fixture 801 are located on the same side and close to the outlet end of the positioning plate 3; as shown in fig. 9 and 12, the third positioning column 2208 and the fourth positioning column 2209 of the second positioning fixture 802 are on the same side and close to the inlet end of the positioning plate 3; as shown in fig. 9 and 11, the third positioning column 2208 and the fourth positioning column 2209 of the third positioning fixture 803 are on the same side and close to the outlet end of the positioning plate 3; as shown in fig. 9 and 12, the third positioning column 2208 and the fourth positioning column 2209 of the fourth positioning fixture 804 are on the same side and close to the inlet end of the positioning plate 3; as shown in fig. 9 and 12, the third positioning column 2208 and the fourth positioning column 2209 of the sixth positioning fixture 806 are located on the same side and close to the inlet end of the positioning plate 3.

As shown in fig. 27, the 6 automatic screw-locking mechanisms 7 are composed of 4 first automatic screw-locking mechanisms 11, 1 second automatic screw-locking mechanism 12, and 1 third automatic screw-locking mechanism 13. In the direction from the feeding conveyer belt 2 to the discharging conveyer belt 4, 4 first automatic screw locking mechanisms 11, 1 second automatic screw locking mechanism 12 and 1 third automatic screw locking mechanism 13 are arranged in a straight shape on the back of the rack table-board 1.

As shown in fig. 17, each of the first automatic screw locking mechanisms 11 has 4 locking mechanisms and 4 screw chucks 14; the 4 drivers 715 are arranged in 2 rows, each row being 2; one driver 715 for each screwdriver head 14, the bit of each driver 715 facing the second through hole 1406 of one screwdriver head 14. The screw feeding mechanism 6 corresponding to the first automatic screw locking mechanism 11 has four-way 614, four second pipes 610 are respectively connected with the screw feeding pipes 1407 on the 4 screw chucks 14, and one second pipe 610 is connected with one screw feeding pipe 1407.

As shown in fig. 18, in the second automatic screw locking mechanism 12, there are 4 locking mechanisms and 4 screw chucks 14; 4 screwdrivers 715 are arranged in a shape of a Chinese character 'yi'; one driver 715 for each screwdriver head 14, the bit of each driver 715 facing the second through hole 1406 of one screwdriver head 14. The screw feeding mechanism 6 corresponding to the second automatic screw locking mechanism 12 has four-way 614, four second pipes 610 are respectively connected with the screw feeding pipes 1407 on the 4 screw chucks 14, and one second pipe 610 is connected with one screw feeding pipe 1407.

As shown in fig. 19, in the third automatic screw locking mechanism 13, there are 2 locking mechanisms, there are 2 screw chucks 14; 2 screwdrivers 715 are arranged in a shape of a Chinese character 'yi'; one driver 715 for each screwdriver head 14, the bit of each driver 715 facing the second through hole 1406 of one screwdriver head 14. The screw feeding mechanism 6 corresponding to the third automatic screw locking mechanism 13 has two cross-connections 614, two second pipes 610 are respectively connected with the screw feeding pipes 1407 of the 2 screw chucks 14, and one second pipe 610 is connected with one screw feeding pipe 1407.

Example 1

The method for locking the 4P molded case circuit breaker base by using the automatic screw locking system provided by the invention comprises the following steps:

1. when the 4P molded case circuit breaker base 18 assembled with the part product is fed onto the first slot unit 3-1 (the first pole groove 1809 of the 4P molded case circuit breaker base 18 is upward) in the direction from the feeding conveyor belt 2 to the discharging conveyor belt 4, the piston rod of the first third cylinder 502 extends out of the downward pushing block 504, the pressing block 504 presses the fixing block 505 and the first positioning fixture 801 downward, so that the first positioning fixture 801 is fitted with the 4P molded case circuit breaker base 18 assembled with the part product, specifically, as shown in fig. 1 and 11, the 1 st first pole groove 1809 from right to left at the bottom of the 4P molded case circuit breaker base 18 is fitted on the second fastening unit of the first positioning fixture 801; the port of the straight threaded hole 1602 of the 1 st locking hole from right to left in the first inlet wire screw lower hole group 1801 is sleeved on the sixth positioning pin 2204 of the first positioning fixture 801; the 1 st and 2 nd locking holes from right to left in the first stationary contact screw lower hole group 1802, and the ports of the straight threaded holes 1602 of the two locking holes are respectively sleeved on the two seventh positioning pins 2205 of the first positioning fixture 801; the port of the 1 st first positioning hole 1807 of the 4P molded case circuit breaker base 18 from right to left is sleeved on the third positioning column 2208 of the first positioning fixture 801; the 1 st locking hole from right to left of the first outlet screw lower hole group 1806 is sleeved with the port of the straight threaded hole 1602 of the first outlet screw lower hole group on the eighth positioning pin 2206 of the first positioning fixture 801; the 1 st and 2 nd locking holes from right to left in the first conductive double-gold screw lower hole group 1805 are respectively sleeved with the ports of the straight threaded holes 1602 of the two locking holes on the two ninth positioning pins 2207 of the first positioning fixture 801; the port of the 1 st second positioning hole 1808 of the 4P molded case circuit breaker base 18 from right to left is sleeved on the fourth positioning column 2209 of the first positioning fixture 801;

from pay-off conveyer belt 2 to ejection of compact conveyer belt 4 direction, the hole that first automatic lock screw mechanism 11 lock attaches is: as shown in fig. 1, the first stationary contact screw bottom hole set 1802 includes a first locking hole and a second locking hole from right to left, and the first conductive bimetal screw bottom hole set 1805 includes a first locking hole and a second locking hole from right to left.

2. When the 4P molded case circuit breaker base 18 with the assembled part product is fed onto the second slot unit 3-1 in the direction from the feeding conveyor belt 2 to the discharging conveyor belt 4 (the first pole groove 1809 of the 4P molded case circuit breaker base 18 is upward), the piston rod of the second third cylinder 502 extends out of the downward pushing block 504, the pressing block 504 presses the fixing block 505 and the second positioning clamp 802 downward, so that the second positioning clamp 802 is fitted with the 4P molded case circuit breaker base 18 with the assembled part product, specifically, as shown in fig. 1 and 12, the 2 nd first pole groove 1809 from right to left at the bottom of the 4P molded case circuit breaker base 18 is fitted on the second fastening unit of the second positioning clamp 802; the port of the straight threaded hole 1602 of the 2 nd locking hole from right to left in the first inlet wire screw lower hole group 1801 is sleeved on the sixth positioning pin 2204 of the second positioning fixture 802; the 3 rd and 4 th locking holes from right to left in the first lower hole set 1802 of the stationary contact screw are respectively sleeved with the ports of the straight threaded holes 1602 of the two locking holes on the two seventh positioning pins 2205 of the second positioning fixture 802; the port of the 1 st first positioning hole 1807 of the 4P molded case circuit breaker base 18 from right to left is sleeved on the third positioning column 2208 of the second positioning fixture 802; the port of the straight threaded hole 1602 of the 2 nd locking hole from right to left of the first outlet screw lower hole group 1806 is sleeved on the eighth positioning pin 2206 of the second positioning fixture 802; the 3 rd and 4 th locking holes from right to left of the first conductive double-gold screw lower hole group 1805 are respectively sleeved with the ports of the straight threaded holes 1602 of the two locking holes on the two ninth positioning pins 2207 of the second positioning fixture 802; the port of the 1 st second positioning hole 1808 of the 4P molded case circuit breaker base 18 from right to left is sleeved on the fourth positioning column 2209 of the second positioning fixture 802;

in the direction from the feeding conveyer belt 2 to the discharging conveyer belt 4, the holes locked by the second first automatic screw locking mechanism 11 are: as shown in fig. 1, the first stationary contact screw lower hole set 1802, and the first conductive bimetal screw lower hole set 1805, include the third and fourth locking holes from right to left.

3. When the 4P molded case circuit breaker base 18 assembled with the part product is fed onto the third slot unit 3-1 in the direction from the feeding conveyor belt 2 to the discharging conveyor belt 4 (the first pole groove 1809 of the 4P molded case circuit breaker base 18 is upward), the piston rod of the third cylinder 502 extends out of the downward pushing block 504, the pressing block 504 presses the fixing block 505 and the third positioning clamp 803 downward, so that the third positioning clamp 803 is fitted with the 4P molded case circuit breaker base 18 assembled with the part product, specifically, as shown in fig. 1 and 11, the 3 rd first pole groove 1809 from right to left at the bottom of the 4P molded case circuit breaker base 18 is fitted on the second fastening unit of the third positioning clamp 803; the port of the straight threaded hole 1602 of the 3 rd locking hole from right to left in the first inlet wire screw lower hole group 1801 is sleeved on the sixth positioning pin 2204 of the third positioning fixture 803; the 5 th and 6 th locking holes from right to left in the first lower hole set 1802 for the stationary contact screw are respectively sleeved with the ports of the straight threaded holes 1602 of the two locking holes on the two seventh positioning pins 2205 of the third positioning fixture 803; the port of the 3 rd first positioning hole 1807 of the 4P molded case circuit breaker base 18 from right to left is sleeved on the third positioning column 2208 of the third positioning fixture 803; a 3 rd locking hole from right to left in the first outlet screw lower hole group 1806, wherein a port of the straight threaded hole 1602 is sleeved on the eighth positioning pin 2206 of the third positioning fixture 803; the 5 th and 6 th locking holes from right to left in the first conductive double-gold screw lower hole group 1805 are respectively sleeved with the ports of the straight threaded holes 1602 of the two locking holes on the two ninth positioning pins 2207 of the third positioning fixture 803; the port of the 3 rd second positioning hole 1808 of the 4P molded case circuit breaker base 18 from right to left is sleeved on the fourth positioning column 2209 of the third positioning fixture 803;

from pay-off conveyer belt 2 to the direction of ejection of compact conveyer belt 4, the hole that the lock of third automatic screw locking mechanism 11 attaches is: as shown in fig. 1, the first stationary contact screw lower hole set 1802, and the first conductive bimetal screw lower hole set 1805, include the fifth and sixth locking holes from right to left.

4. When the 4P molded case circuit breaker base 18 assembled with the part product is fed onto the fourth slot unit 3-1 in the direction from the feeding conveyor belt 2 to the discharging conveyor belt 4 (the first pole groove 1809 of the 4P molded case circuit breaker base 18 is upward), the piston rod of the fourth third cylinder 502 extends out of the downward pushing block 504, the pressing block 504 presses the fixing block 505 and the fourth positioning clamp 804 downward, so that the fourth positioning clamp 804 is fitted with the 4P molded case circuit breaker base 18 assembled with the part product, specifically, as shown in fig. 1 and 12, the 4 th first pole groove 1809 from right to left at the bottom of the 4P molded case circuit breaker base 18 is fitted on the second fastening unit of the fourth positioning clamp 804; the 4 th locking hole from right to left in the first inlet wire screw lower hole group 1801 has a straight threaded hole 1602 port sleeved on the sixth positioning pin 2204 of the fourth positioning fixture 804; the 7 th and 8 th locking holes from right to left in the first lower hole set 1802 of the stationary contact screw are respectively sleeved with the ports of the straight threaded holes 1602 of the two locking holes on the two seventh positioning pins 2205 of the fourth positioning fixture 804; the port of the 3 rd first positioning hole 1807 of the 4P molded case circuit breaker base 18 from right to left is sleeved on the third positioning column 2208 of the fourth positioning fixture 804; the 4 th locking hole from right to left of the first outlet screw lower hole group 1806 is sleeved with the port of the straight threaded hole 1602 of the eighth positioning pin 2206 of the fourth positioning fixture 804; the 7 th and 8 th locking holes from right to left of the first conductive double-gold screw lower hole group 1805 are respectively sleeved with the ports of the straight threaded holes 1602 of the two locking holes on the two ninth positioning pins 2207 of the fourth positioning fixture 804; the port of the 3 rd second positioning hole 1808 of the 4P molded case circuit breaker base 18 from right to left is sleeved on the fourth positioning column 2209 of the fourth positioning fixture 804;

from pay-off conveyer belt 2 to the direction of ejection of compact conveyer belt 4, the hole that the fourth 11 locks of automatic lock screw mechanisms attaches is: as shown in fig. 1, the first stationary contact screw lower hole set 1802 is seven locking holes and eighth locking holes from right to left, and the first conductive bimetal screw lower hole set 1805 is seven locking holes and eighth locking holes from right to left.

5. When the 4P molded case circuit breaker base 18 equipped with the part product is fed onto the fifth slot unit 3-1 in the direction from the feeding conveyor belt 2 to the discharging conveyor belt 4 (the first pole groove 1809 of the 4P molded case circuit breaker base 18 is upward), the piston rod of the fifth third cylinder 502 extends out of the downward pushing block 504, and the pressing block 504 presses the fixing block 505 and the fifth positioning clamp 805 downward, so that the fifth positioning clamp 805 fits with the 4P molded case circuit breaker base 18 equipped with the part product, specifically, as shown in fig. 1 and 10, the 4 first pole grooves 1809 at the bottom of the 4P molded case circuit breaker base 18 fit with the 4 first buckling units of the five positioning clamp 805; 4 locking holes of the first outlet screw lower hole group 1806 are provided, and the ports of the straight threaded holes 1602 of the first outlet screw lower hole group are sleeved on 4 first positioning pins 2105 on 4 first bosses 2102; 8 locking holes of the first conductive double-gold screw lower hole group 1805 are provided, and the ports of the straight screw holes 1602 are sleeved on 8 second positioning pins 2106 on the 4 first bosses 2102; 4 locking holes of the first conductive system hot element screw lower hole set 1804 with straight threaded holes 1602 ported over 4 third alignment pins 2107 on 4 second bosses 2103; in the 4 locking holes of the first inlet screw lower hole group 1801, the ports of the straight threaded hole 1602 thereof are sleeved on 4 fourth positioning pins 2108 on 4 third bosses 2104; the ports of the straight threaded holes 1602 of the 8 locking holes of the first lower set 1802 of stationary contact screws are sleeved on the 8 fifth positioning pins 2109 on the 4 third bosses 2104; a first positioning hole 1807 on the 4P molded case circuit breaker base 18 is sleeved on the second positioning column 2111, and a second positioning hole 1808 is sleeved on the first positioning column 2110;

the holes locked by the second automatic screw locking mechanism 12 are as follows: the 4 locking holes of the first conductive system hot element screw lower hole set 1804.

6. When the 4P molded case circuit breaker base 18 equipped with the part product is fed onto the sixth slot unit 3-1 in the direction from the feeding conveyor belt 2 to the discharging conveyor belt 4 (the first pole groove 1809 of the 4P molded case circuit breaker base 18 is upward), the piston rod of the sixth third cylinder 502 extends out of the downward pushing block 504, the pressing block 504 presses the fixing block 505 and the sixth positioning clamp 806 downward, so that the sixth positioning clamp 806 fits with the 4P molded case circuit breaker base 18 equipped with the part product, specifically, as shown in fig. 1 and 12, the 2 nd first pole groove 1809 from right to left at the bottom of the 4P molded case circuit breaker base 18 fits on the second buckling unit of the sixth positioning clamp 806; the 2 nd locking hole from right to left in the first inlet wire screw lower hole group 1801 has a port of the straight threaded hole 1602 thereof fitted over the sixth positioning pin 2204 of the sixth positioning fixture 806; the 3 rd and 4 th locking holes from right to left in the first lower hole set 1802 of the stationary contact screw are respectively sleeved with the ports of the straight threaded holes 1602 of the two locking holes on the two seventh positioning pins 2205 of the sixth positioning fixture 806; a port of a 1 st first positioning hole 1807 of the 4P molded case circuit breaker base 18 from right to left is sleeved on the third positioning column 2208 of the sixth positioning fixture 806; the 2 nd locking hole from right to left in the first outlet screw lower hole group 1806 has a port of the straight threaded hole 1602 thereof fitted on the eighth positioning pin 2206 of the sixth positioning fixture 806; the 3 rd and 4 th locking holes from right to left in the first conductive double-gold screw lower hole group 1805 are respectively sleeved with the ports of the straight threaded holes 1602 of the two locking holes on the two ninth positioning pins 2207 of the sixth positioning fixture 806; a port of a 1 st second positioning hole 1808 of the 4P molded case circuit breaker base 18 from right to left is sleeved on the fourth positioning column 2209 of the sixth positioning fixture 806;

the holes locked by the third automatic screw locking mechanism 13 are as follows: the first set of frame screw bottom holes 1803 have 2 locking holes.

The first inlet screw lower hole group 1801 and the first outlet screw lower hole group 1806 cannot be locked by the automatic locking system of the present invention due to their large hole diameters, and need to be locked by other locking devices.

Example 2

The method for locking the base of the 3P molded case circuit breaker by using the automatic screw locking system provided by the invention comprises the following steps:

1. when the 3P molded case circuit breaker base 19 equipped with the part product is fed onto the first slot unit 3-1 in the direction from the feeding conveyor 2 to the discharging conveyor 4 (the second pole groove 1909 of the 3P molded case circuit breaker base 19 is upward), the piston rod of the first third cylinder 502 extends out of the downward pushing block 504, the pressing block 504 presses the fixing block 505 and the first positioning clamp 801 downward, so that the first positioning clamp 801 fits with the 3P molded case circuit breaker base 19 equipped with the part product, specifically, as shown in fig. 2 and 11, the 1 st second pole groove 1909 from right to left at the bottom of the 3P molded case circuit breaker base 19 fits on the second buckling unit of the first positioning clamp 801; the port of the straight threaded hole 1602 of the 1 st locking hole from right to left in the second inlet wire screw lower hole group 1901 is sleeved on the sixth positioning pin 2204 of the first positioning fixture 801; the ports of the straight threaded holes 1602 of the second fixed contact screw lower hole group 1902 are respectively sleeved on the two seventh positioning pins 2205 of the first positioning fixture 801; the port of the 1 st third positioning hole 1907 of the 3P molded case circuit breaker base 19 from right to left is sleeved on the third positioning column 2208 of the first positioning fixture 801; the 1 st locking hole from right to left in the second outlet screw lower hole group 1906 has the port of the straight threaded hole 1602 thereof sleeved on the eighth positioning pin 2206 of the first positioning fixture 801; the 1 st and 2 nd locking holes from right to left in the second conductive double-gold screw lower hole group 1905 are respectively sleeved with the ports of the straight threaded holes 1602 of the two locking holes on the two ninth positioning pins 2207 of the first positioning fixture 801; a port of a 1 st fourth positioning hole 1908 of the 3P molded case circuit breaker base 19 from right to left is sleeved on a fourth positioning column 2209 of the first positioning fixture 801;

from pay-off conveyer belt 2 to ejection of compact conveyer belt 4 direction, the hole that first automatic lock screw mechanism 11 lock attaches is: as shown in fig. 2, the second stationary contact screw lower hole group 1902 includes a first locking hole and a second locking hole from right to left, and the second conductive bimetal screw lower hole group 1905 includes a first locking hole and a second locking hole from right to left.

2. When the 3P molded case circuit breaker base 19 with the part product assembled thereon is fed onto the second slot unit 3-1 in the direction from the feeding conveyor 2 to the discharging conveyor 4 (the second pole groove 1909 of the 3P molded case circuit breaker base 19 is upward), the piston rod of the second third cylinder 502 extends out of the downward pushing block 504, the pressing block 504 presses the fixing block 505 and the second positioning clamp 802 downward, so that the second positioning clamp 802 is fitted with the 3P molded case circuit breaker base 19 with the part product assembled thereon, specifically, as shown in fig. 2 and 12, the 2 nd second pole groove 1909 from right to left at the bottom of the 3P molded case circuit breaker base 19 is fitted on the second fastening unit of the second positioning clamp 802; a 2 nd locking hole from right to left in the second inlet wire screw lower hole group 1901, wherein a port of the straight threaded hole 1602 is sleeved on the sixth positioning pin 2204 of the second positioning fixture 802; the ports of the straight threaded holes 1602 of the second fixed contact screw lower hole group 1902 are respectively sleeved on the two seventh positioning pins 2205 of the second positioning fixture 802; a port of the 1 st third positioning hole 1907 of the 3P molded case circuit breaker base 19 from right to left is sleeved on the third positioning column 2208 of the second positioning fixture 802; the 2 nd locking hole from right to left in the second outlet screw lower hole group 1906 has a port of the straight threaded hole 1602 thereof sleeved on the eighth positioning pin 2206 of the second positioning fixture 802; the 3 rd and 4 th locking holes from right to left in the second conductive double-gold screw lower hole group 1905 are respectively sleeved with the ports of the straight threaded holes 1602 of the two locking holes on the two ninth positioning pins 2207 of the second positioning fixture 802; a port of a 1 st fourth positioning hole 1908 of the 3P molded case circuit breaker base 19 from right to left is sleeved on a fourth positioning column 2209 of the second positioning fixture 802;

in the direction from the feeding conveyer belt 2 to the discharging conveyer belt 4, the holes locked by the second first automatic screw locking mechanism 11 are: as shown in fig. 2, the second stationary contact screw lower hole group 1902 includes a third locking hole and a fourth locking hole from right to left, and the second conductive bimetal screw lower hole group 1905 includes a third locking hole and a fourth locking hole from right to left.

3. When the 3P molded case circuit breaker base 19 equipped with the part product is fed onto the third slot unit 3-1 in the direction from the feeding conveyor belt 2 to the discharging conveyor belt 4, the base pressing unit corresponding to the third slot unit 3-1, the screw feeding mechanism 6 and the third first automatic screw locking mechanism 11 are not operated.

4. When the 3P molded case circuit breaker base 19 equipped with the part product is fed onto the fourth slot unit 3-1 in the direction from the feeding conveyor 2 to the discharging conveyor 4 (with the second pole groove 1909 of the 3P molded case circuit breaker base 19 facing upward), the piston rod of the fourth third cylinder 502 extends out of the downward pushing block 504, the pressing block 504 presses the fixing block 505 and the fourth positioning clamp 804 downward, so that the fourth positioning clamp 804 fits with the 3P molded case circuit breaker base 19 equipped with the part product, specifically, as shown in fig. 2 and 12, the 3 rd second pole groove 1909 from right to left in the bottom of the 3P molded case circuit breaker base 19 fits on the second buckling unit of the fourth positioning clamp 804; a 3 rd locking hole from right to left in the second inlet wire screw lower hole group 1901, wherein a port of the straight threaded hole 1602 is sleeved on the sixth positioning pin 2204 of the fourth positioning fixture 804; the 5 th and 6 th locking holes from right to left in the second lower static contact screw hole group 1902, the ports of the straight threaded holes 1602 of the two locking holes are respectively sleeved on the two seventh positioning pins 2205 of the fourth positioning fixture 804; a port of a 2 nd third positioning hole 1907 of the 3P molded case circuit breaker base 19 from right to left is sleeved on the third positioning column 2208 of the fourth positioning fixture 804; the port of the straight threaded hole 1602 of the 3 rd locking hole from right to left in the second outlet screw lower hole group 1906 is sleeved on the eighth positioning pin 2206 of the fourth positioning fixture 804; the 5 th and 6 th locking holes of the second conductive double-gold screw lower hole group 1905 from right to left are respectively sleeved with the straight threaded holes 1602 ports of the two locking holes on the two ninth positioning pins 2207 of the fourth positioning fixture 804; a port of a 2 nd fourth positioning hole 1908 of the 3P molded case circuit breaker base 19 from right to left is sleeved on a fourth positioning column 2209 of the fourth positioning fixture 804;

from pay-off conveyer belt 2 to the direction of ejection of compact conveyer belt 4, the hole that the fourth 11 locks of automatic lock screw mechanisms attaches is: the second stationary contact screw lower hole group 1902 includes a fifth locking hole and a sixth locking hole from right to left, and the second conductive bimetallic screw lower hole group 1905 includes a fifth locking hole and a sixth locking hole from right to left.

5. When the 3P molded case circuit breaker base 19 equipped with the part product is fed onto the fifth slot unit 3-1 in the direction from the feeding conveyor 2 to the discharging conveyor 4 (the second pole groove 1909 of the 3P molded case circuit breaker base 19 is upward), the piston rod of the fifth third cylinder 502 extends out of the downward pushing block 504, the pressing block 504 presses the fixing block 505 and the fifth positioning clamp 805 downward, so that the fifth positioning clamp 805 fits with the 3P molded case circuit breaker base 19 equipped with the part product, specifically, as shown in fig. 2 and 10, 3 second pole grooves 1909 at the bottom of the 3P molded case circuit breaker base 19 are fitted on 3 first buckling units of the fifth positioning clamp 805, and the other 1 first buckling unit is empty; wherein, the ports of the straight threaded holes 1602 of the 3 locking holes of the second outlet screw lower hole group 1906 are sleeved on the 3 first positioning pins 2105 on the 3 first bosses 2102; 6 locking holes of the second conductive double-gold screw lower hole group 1905 are provided, and the ports of the straight screw holes 1602 are sleeved on 6 second positioning pins 2106 on the 3 first bosses 2102; 3 locking holes of the second conductive system hot element screw lower hole group 1904, the port of the straight threaded hole 1602 of which is sleeved on 3 third positioning pins 2107 on 3 second bosses 2103; the ports of the straight threaded holes 1602 of the 3 locking holes of the second inlet screw lower hole group 1901 are sleeved on the 3 fourth positioning pins 2108 on the 3 third bosses 2104; in the 6 locking holes of the second lower hole 1902 for static contact screws, the ports of the straight threaded holes 1602 are sleeved on the 6 fifth positioning pins 2109 on the 3 third bosses 2104; a third positioning hole 1907 of the 3P molded case circuit breaker base 19 is sleeved on the second positioning post 2111, and a fourth positioning hole 1908 is sleeved on the first positioning post 2110;

the holes locked by the second automatic screw locking mechanism 12 are as follows: 3 locking holes of the second conductive system thermoelement screw lower hole set 1904; since the second automatic screw locking mechanism 12 has four locking mechanisms and four screw chucks 14, the four screw chucks 14 are arranged in a line, but only three locking mechanisms and three corresponding screw chucks 14 are operated to perform locking work, and the remaining one locking mechanism and the corresponding screw chuck 14 are not operated.

6. When the 3P molded case circuit breaker base 19 equipped with the part product is fed onto the sixth slot unit 3-1 in the direction from the feeding conveyor 2 to the discharging conveyor 4 (the second pole groove 1909 of the 3P molded case circuit breaker base 19 is upward), the piston rod of the sixth third cylinder 502 extends out of the downward pushing block 504, the pressing block 504 presses the fixing block 505 and the sixth positioning clamp 806 downward, so that the sixth positioning clamp 806 fits with the 3P molded case circuit breaker base 19 equipped with the part product, specifically, as shown in fig. 2 and 12, the 2 nd second pole groove 1909 from right to left at the bottom of the 3P molded case circuit breaker base 19 fits on the second buckling unit of the sixth positioning clamp 806; a 2 nd locking hole from right to left in the second inlet wire screw lower hole group 1901, wherein a port of the straight threaded hole 1602 is sleeved on the sixth positioning pin 2204 of the sixth positioning fixture 806; the ports of the straight threaded holes 1602 of the second fixed contact screw lower hole group 1902 are respectively sleeved on the two seventh positioning pins 2205 of the sixth positioning fixture 806; a port of the 1 st third positioning hole 1907 of the 3P molded case circuit breaker base 19 from right to left is sleeved on the third positioning column 2208 of the sixth positioning fixture 806; the 2 nd locking hole from right to left in the second outlet screw lower hole group 1906 has a port of the straight threaded hole 1602 thereof fitted over the eighth positioning pin 2206 of the sixth positioning fixture 806; the 3 rd and 4 th locking holes from right to left in the second conductive double-gold screw lower hole group 1905 are respectively sleeved with the ports of the straight threaded holes 1602 of the two locking holes on the two ninth positioning pins 2207 of the sixth positioning fixture 806; a port of a 1 st fourth positioning hole 1908 of the 3P molded case circuit breaker base 19 from right to left is sleeved on a fourth positioning column 2209 of the sixth positioning fixture 806;

the holes locked by the third automatic screw locking mechanism 13 are as follows: 2 locking holes of the second rack screw lower hole group 1903.

The second lower hole set 1901 for incoming screws and the second lower hole set 1906 for outgoing screws cannot be locked by the automatic locking system of the present invention because of their large apertures, and need to be locked by other locking devices.

Example 3

The method for locking the 2P molded case circuit breaker base by using the automatic screw locking system provided by the invention comprises the following steps:

1. when the 2P molded case circuit breaker base 20 equipped with the part product is fed onto the first slot unit 3-1 in the direction from the feeding conveyor 2 to the discharging conveyor 4 (the third pole groove 2009 of the 2P molded case circuit breaker base 20 is upward), the piston rod of the first third cylinder 502 extends out of the downward pushing block 504, the pressing block 504 presses the fixing block 505 and the first positioning clamp 801 downward, so that the first positioning clamp 801 is engaged with the 2P molded case circuit breaker base 20 equipped with the part product, specifically, as shown in fig. 3 and 11, the 1 st third pole groove 2009 from right to left in the bottom of the 2P molded case circuit breaker base 20 is engaged with the second engaging unit of the first positioning clamp 801; the 1 st locking hole from right to left in the third lower hole set 2001 of the incoming screw is sleeved with the port of the straight threaded hole 1602 of the 1 st locking hole on the sixth positioning pin 2204 of the first positioning clamp 801; the 1 st and 2 nd locking holes from right to left in the third lower hole group 2002 for the stationary contact screw are respectively sleeved with the ports of the straight threaded holes 1602 of the two locking holes on the two seventh positioning pins 2205 of the first positioning fixture 801; a port of a fifth positioning hole 2007 of the 2P molded case circuit breaker base 20 is sleeved on the third positioning column 2208 of the first positioning fixture 801; the port of the straight threaded hole 1602 of the 1 st locking hole from right to left in the third outlet screw lower hole group 2006 is sleeved on the eighth positioning pin 2206 of the first positioning fixture 801; the ports of the straight threaded holes 1602 of the first conductive double-gold screw lower hole group 2005 are respectively sleeved on the first positioning pins 2207 of the first positioning fixture 801; a sixth positioning hole 2008 port of the 2P molded case circuit breaker base 20 is sleeved on the fourth positioning column 2209 of the first positioning fixture 801;

from pay-off conveyer belt 2 to ejection of compact conveyer belt 4 direction, the hole that first automatic lock screw mechanism 11 lock attaches is: as shown in fig. 3, the third stationary contact screw lower hole group 2002 is the first locking hole and the second locking hole from right to left, and the third conductive bimetal screw lower hole group 2005 is the first locking hole and the second locking hole from right to left.

2. When the 2P molded case circuit breaker base 20 equipped with the part product is fed onto the second slot unit 3-1 in the direction from the feeding conveyor 2 to the discharging conveyor 4 (the third pole groove 2009 of the 2P molded case circuit breaker base 20 is upward), the piston rod of the second third cylinder 502 extends out of the downward pushing block 504, the pressing block 504 presses the fixing block 505 and the second positioning clamp 802 downward, so that the second positioning clamp 802 is engaged with the 2P molded case circuit breaker base 20 equipped with the part product, specifically, as shown in fig. 3 and 12, the 2 nd third pole groove 2009 from right to left in the bottom of the 2P molded case circuit breaker base 20 is embedded on the second engaging unit of the second positioning clamp 802; the 2 nd locking hole from right to left in the third lower hole set 2001 of the incoming screw is sleeved with the port of the straight threaded hole 1602 of the 2 nd locking hole on the sixth positioning pin 2204 of the second positioning fixture 802; the 3 rd and 4 th locking holes from right to left in the third lower hole set 2002 for the stationary contact screw are respectively sleeved with the ports of the straight threaded holes 1602 of the two locking holes on the two seventh positioning pins 2205 of the second positioning fixture 802; a port of a fifth positioning hole 2007 of the 2P molded case circuit breaker base 20 is sleeved on the third positioning column 2208 of the second positioning fixture 802; the port of the straight threaded hole 1602 of the 2 nd locking hole from right to left in the third outlet screw lower hole group 2006 is sleeved on the eighth positioning pin 2206 of the second positioning fixture 802; the 3 rd and 4 th locking holes from right to left in the third conductive double-gold screw lower hole group 2005 are respectively sleeved with the ports of the straight threaded holes 1602 of the two locking holes on the two ninth positioning pins 2207 of the second positioning fixture 802; a sixth positioning hole 2008 port of the 2P molded case circuit breaker base 20 is sleeved on the fourth positioning column 2209 of the second positioning fixture 802;

in the direction from the feeding conveyer belt 2 to the discharging conveyer belt 4, the holes locked by the second first automatic screw locking mechanism 11 are: as shown in fig. 3, the third stationary contact screw lower hole group 2002 is the third locking hole and the fourth locking hole from right to left, and the third conductive bimetal screw lower hole group 2005 is the third locking hole and the fourth locking hole from right to left.

3. When the 2P molded case circuit breaker base 20 with the parts assembled thereon is fed onto the third slot unit 3-1 in the direction from the feeding conveyor belt 2 to the discharging conveyor belt 4, the base pressing unit corresponding to the third slot unit 3-1, the screw feeding mechanism 6 and the third first automatic screw locking mechanism 11 are not operated.

4. When the 2P molded case circuit breaker base 20, which is assembled with the part product, is fed onto the fourth slot unit 3-1 in the direction from the feeding conveyor belt 2 to the discharging conveyor belt 4, the base pressing unit, the screw feeding mechanism 6, and the fourth first automatic screw locking mechanism 11, which correspond to the fourth slot unit 3-1, do not operate.

5. When the 2P molded case circuit breaker base 20 equipped with the part product is fed onto the fifth slot unit 3-1 in the direction from the feeding conveyor 2 to the discharging conveyor 4 (the third pole groove 2009 of the 2P molded case circuit breaker base 20 is upward), the piston rod of the fifth third cylinder 502 extends out of the downward pushing block 504, the pressing block 504 presses the fixing block 505 and the fifth positioning clamp 805 downward, so that the fifth positioning clamp 805 fits with the 2P molded case circuit breaker base 20 equipped with the part product, specifically, as shown in fig. 3 and 10, the 2 third pole grooves 2009 at the bottom of the 2P molded case circuit breaker base 20 are embedded on the 2 first buckling units of the fifth positioning clamp 805, and the other 2 first buckling units are empty; the port of the straight threaded hole 1602 of the 2 locking holes of the third outlet screw lower hole group 2006 is sleeved on the 2 first positioning pins 2105 on the 2 first bosses 2102; 4 locking holes of the third conductive double-gold screw lower hole group 2005 are provided, and the ports of the straight threaded holes 1602 are sleeved on 4 second positioning pins 2106 on 2 first bosses 2102; 2 locking holes of the third conduction system hot element screw lower hole group 2004, the port of the straight screw hole 1602 is sleeved on 2 third positioning pins 2107 on 2 second bosses 2103; 2 locking holes of the third inlet screw lower hole group 2001, and the ports of the straight threaded holes 1602 of the third inlet screw lower hole group are sleeved on 2 fourth positioning pins 2108 on 2 third bosses 2104; 4 locking holes of the third lower hole group 2002 for the stationary contact screws, and the ports of the straight screw holes 1602 of the third lower hole group are sleeved on 4 fifth positioning pins 2109 on 2 third bosses 2104; a fifth positioning hole 2007 of the 2P molded case circuit breaker base 20 is sleeved on the second positioning post 2111, and a sixth positioning hole 2008 is sleeved on the first positioning post 2110;

the holes locked by the second automatic screw locking mechanism 12 are as follows: 2 locking holes of the third conductive system hot element screw lower hole set 2004; since the second automatic screw locking mechanism 12 has four locking mechanisms and four screw chucks 14, the four screw chucks 14 are arranged in a line, but only two locking mechanisms and two corresponding screw chucks 14 are operated to perform locking work, and the remaining two locking mechanisms and two corresponding screw chucks 14 are not operated.

6. When the 2P molded case circuit breaker base 20 equipped with the part product is fed onto the sixth slot unit 3-1 in the direction from the feeding conveyor 2 to the discharging conveyor 4 (the third pole groove 2009 of the 2P molded case circuit breaker base 20 is upward), the piston rod of the sixth third cylinder 502 extends out of the downward pushing block 504, the pressing block 504 presses the fixing block 505 and the sixth positioning clamp 806 downward, so that the sixth positioning clamp 806 is engaged with the 2P molded case circuit breaker base 20 equipped with the part product, specifically, as shown in fig. 3 and 12, the 2 nd third pole groove 2009 from right to left at the bottom of the 2P molded case circuit breaker base 20 is engaged with the second engaging unit of the sixth positioning clamp 806; the 2 nd locking hole from right to left in the third lower hole set 2001 for the incoming screw is sleeved with the port of the straight threaded hole 1602 of the third locking hole on the sixth positioning pin 2204 of the sixth positioning fixture 806; the 3 rd and 4 th locking holes from right to left in the third lower hole set 2002 for the stationary contact screw are respectively sleeved with the ports of the straight threaded holes 1602 of the two locking holes on the two seventh positioning pins 2205 of the sixth positioning fixture 806; a port of a fifth positioning hole 2007 of the 2P molded case circuit breaker base 20 is sleeved on the third positioning column 2208 of the sixth positioning fixture 806; a port of the straight threaded hole 1602 of the 2 nd locking hole from right to left in the third outlet screw lower hole group 2006 is sleeved on the eighth positioning pin 2206 of the sixth positioning fixture 806; the ports of the straight threaded holes 1602 of the third conductive double-gold screw lower hole group 2005 from right to left are respectively sleeved on the two ninth positioning pins 2207 of the sixth positioning fixture 806; a sixth positioning hole 2008 port of the 2P molded case circuit breaker base 20 is sleeved on the fourth positioning column 2209 of the sixth positioning fixture 806;

the holes locked by the third automatic screw locking mechanism 13 are as follows: and 2 locking holes of the third rack screw lower hole group 2003.

The third lower hole group 2001 for the incoming screw and the third lower hole group 2006 for the outgoing screw cannot be locked by the automatic locking system of the present invention due to the large hole diameter, and other locking devices are required for locking.

Claims

1. Compatible multiple moulded case circuit breaker base's automatic lock screw system, its characterized in that: comprises a rack table board (1), a production line, a pressing device (5), a plurality of screw feeding mechanisms (6) and a plurality of automatic screw locking mechanisms (7); the production line and the screw feeding mechanisms (6) are arranged on the front surface of the rack table top (1), and the automatic screw locking mechanisms (7) are arranged on the back surface of the rack table top (1);

the production line comprises a feeding conveyer belt (2), a positioning plate (3) and a discharging conveyer belt (4); the output end of the feeding conveyer belt (2) is connected with the inlet end of the positioning plate (3), and the outlet end of the positioning plate (3) is connected with the input end of the discharging conveyer belt (4); a plurality of slotted hole units (3-1) are arranged on the positioning plate (3), and each slotted hole unit (3-1) consists of a plurality of slotted holes (3-2); side plates (901) are arranged on two sides of the positioning plate (3), a linear track (902) is fixed on each side plate (901), a sliding plate (903) is embedded in each linear track (902), each linear track (902) and each sliding plate (903) form a linear sliding pair, a plurality of first cylinders (904) are fixed on each sliding plate (903), and a second cylinder (906) is fixed on each side plate (901) close to the feeding conveyor belt (2); the end part of a piston rod of the second cylinder (906) is connected with the sliding plate (903);

the pressing device (5) comprises a supporting plate (501), a plurality of base pressing units are arranged on the supporting plate (501), and each base pressing unit comprises a third air cylinder (502), a first sliding rod (503), a pressing block (504), a fixing block (505) and a positioning clamp; the third cylinder (502) is arranged on the upper surface of the supporting plate (501), and the first sliding rod (503), the pressing block (504), the fixing block (505) and the positioning clamp are arranged on the lower surface of the supporting plate (501); the first sliding rod (503) is fixed on the lower surface of the supporting plate (501), the first sliding rod (503) penetrates through the pressing block (504) and the fixing block (505), and the end part of the piston rod of the third cylinder (502) is connected with the pressing block (504); the positioning clamp is fixed on the lower surface of the fixing block (505);

the pressing device (5) is positioned right above the positioning plate (3); the number of the slotted hole units (3-1), the number of the base pressing units, the number of the screw feeding mechanisms (6) and the number of the automatic screw locking mechanisms (7) are equal and are all 6; a slotted hole unit (3-1) corresponds to a base pressing unit, a screw feeding mechanism (6) and an automatic screw locking mechanism (7);

the supporting plate (501) is provided with 6 base pressing units, a fixing block (505) of each base pressing unit is fixedly provided with a positioning clamp, and the 6 positioning clamps sequentially comprise a first positioning clamp (801), a second positioning clamp (802), a third positioning clamp (803), a fourth positioning clamp (804), a fifth positioning clamp (805) and a sixth positioning clamp (806) from the inlet end to the outlet end of the positioning plate (3);

the fifth positioning clamp (805) comprises a first bottom plate (2101) and 4 first buckling units, wherein the 4 first buckling units are arranged on the first bottom plate (2101) in parallel; each first buckling unit comprises a first boss (2102), a second boss (2103) and a third boss (2104), the first boss (2102) and the second boss (2103) are arranged at one end of the first bottom plate (2101), and the third boss (2104) is arranged at the other end of the first bottom plate (2101); a groove (2113) is formed between two adjacent first buckling units; the first bottom plate (2101) is further provided with a first fixing hole (2112), the fifth positioning clamp (805) is fixed on the lower surface of the fixing block (505) corresponding to the fifth positioning clamp through the first fixing hole (2112), and the first boss (2102), the second boss (2103) and the third boss (2104) face downwards; the lower surface of each first boss (2102) is provided with a first groove and two second grooves; a first positioning pin (2105) is arranged in the first groove, the upper part of the first positioning pin (2105) is positioned in the first groove, and a first spring is arranged between the top of the first positioning pin (2105) and the bottom of the first groove; a second positioning pin (2106) is arranged in each second groove, the upper part of each second positioning pin (2106) is positioned in each second groove, and a second spring is arranged between the top of each second positioning pin (2106) and the bottom of each second groove; a third groove is formed in the lower surface of each second boss (2103), a third positioning pin (2107) is arranged in each third groove, the upper portion of each third positioning pin (2107) is located in each third groove, and a third spring is arranged between the top of each third positioning pin (2107) and the bottom of each third groove; the lower surface of each third boss (2104) is provided with a fourth groove and two fifth grooves; a fourth positioning pin (2108) is arranged in the fourth groove, the upper part of the fourth positioning pin (2108) is positioned in the fourth groove, and a fourth spring is arranged between the top of the fourth positioning pin (2108) and the bottom of the fourth groove; a fifth positioning pin (2109) is arranged in each fifth groove, the upper part of the fifth positioning pin (2109) is positioned in the fifth groove, and a fifth spring is arranged between the top of the fifth positioning pin (2109) and the bottom of the fifth groove; in addition, a first positioning column (2110) and a second positioning column (2111) are arranged in one of the grooves (2113), and the first positioning column (2110) and the second positioning column (2111) are respectively positioned at two ends of the first bottom plate (2101);

the first positioning clamp (801), the second positioning clamp (802), the third positioning clamp (803), the fourth positioning clamp (804) or the sixth positioning clamp (806) comprise a second bottom plate (2201) and 1 second buckling unit, and the second buckling unit is arranged on the second bottom plate (2201); the second buckling unit comprises a fourth boss (2202) and a fifth boss (2203), and the fourth boss (2202) and the fifth boss (2203) are respectively arranged at two ends of the second bottom plate (2201); a second fixing hole (2210) is further arranged on the second bottom plate (2201), the first positioning clamp (801), the second positioning clamp (802), the third positioning clamp (803), the fourth positioning clamp (804) or the sixth positioning clamp (806) are fixed on the lower surface of the corresponding fixing block (505) through the second fixing hole (2210), and the fourth boss (2202) and the fifth boss (2203) face downwards; the lower surface of the fourth boss (2202) is provided with a sixth groove and two seventh grooves; a sixth positioning pin (2204) is arranged in the sixth groove, the upper part of the sixth positioning pin (2204) is positioned in the sixth groove, and a sixth spring is arranged between the top of the sixth positioning pin (2204) and the bottom of the sixth groove; a seventh positioning pin (2205) is arranged in each seventh groove, the upper part of the seventh positioning pin (2205) is positioned in the seventh groove, and a seventh spring is arranged between the top of the seventh positioning pin (2205) and the bottom of the seventh groove; the lower surface of the fifth boss (2203) is provided with an eighth groove and two ninth grooves; an eighth positioning pin (2206) is arranged in the eighth groove, the upper part of the eighth positioning pin (2206) is positioned in the eighth groove, and an eighth spring is arranged between the top of the eighth positioning pin (2206) and the bottom of the eighth groove; a ninth positioning pin (2207) is arranged in each ninth groove, the upper part of the ninth positioning pin (2207) is positioned in the ninth groove, and a ninth spring is arranged between the top of the ninth positioning pin (2207) and the bottom of the ninth groove; a third positioning column (2208) and a fourth positioning column (2209) are further arranged on the second bottom plate (2201), the third positioning column (2208) is located on one side of the fourth boss (2202), and the fourth positioning column (2209) is located on one side of the fifth boss (2203);

a third positioning column (2208) and a fourth positioning column (2209) of the first positioning clamp (801) are arranged on the same side and close to the outlet end of the positioning plate (3); a third positioning column (2208) and a fourth positioning column (2209) of the second positioning fixture (802) are arranged on the same side and close to the inlet end of the positioning plate (3); a third positioning column (2208) and a fourth positioning column (2209) of the third positioning fixture (803) are positioned at the same side and close to the outlet end of the positioning plate (3); a third positioning column (2208) and a fourth positioning column (2209) of the fourth positioning clamp (804) are on the same side and close to the inlet end of the positioning plate (3); a third positioning column (2208) and a fourth positioning column (2209) of the sixth positioning fixture (806) are on the same side and close to the inlet end of the positioning plate (3);

the automatic screw locking mechanism (7) comprises a sixth air cylinder (703), a seventh air cylinder (707), a plurality of locking mechanisms, a plurality of screw chucks (14) and a support frame; the supporting frame comprises a plurality of second sliding rods (701), a base (724), a first supporting plate (704) and a second supporting plate (706); a plurality of second sliding rods (701) are fixed on the base (724), and each second sliding rod (701) is provided with a first double ball bearing (722) and a second double ball bearing (723); the lower ends of the second sliding rods (701) are fixedly provided with supporting plates (702), and sixth air cylinders (703) are arranged on the supporting plates (702); the first double ball bearing (722) is fixedly connected with the first supporting plate (704), and a piston rod of the sixth air cylinder (703) is connected with the first supporting plate (704); a cross frame (705) is fixed in the middle of the second sliding rods (701), the cross frame (705) is positioned between the first double ball bearing (722) and the second double ball bearing (723), and a seventh cylinder (707) is arranged on the cross frame (705); the second double ball bearing (723) is fixedly connected with the second support plate (706), and a piston rod of the seventh air cylinder (707) is connected with the second support plate (706); the locking mechanism comprises an electric screwdriver (708), a transmission mechanism and a screwdriver (715); the electric screwdriver (708) penetrates through the first supporting plate (704) and is clamped on the first supporting plate (704); the transmission mechanism comprises a first universal joint (709), a telescopic shaft (713), a first shaft sleeve (711), a connecting rod (714), a second universal joint (710) and a second shaft sleeve (712), a rotating shaft of the electric screwdriver (708) is connected with the lower end of the telescopic shaft (713) through the first universal joint (709), the upper end of the telescopic shaft (713) is inserted into the first shaft sleeve (711), the first shaft sleeve (711) is provided with a first waist-shaped hole (717), and a first pin shaft (716) penetrates through the upper end of the telescopic shaft (713) and the first waist-shaped hole (717); a tenth spring (726) is sleeved on the telescopic shaft (713) between the first universal joint (709) and the first shaft sleeve (711); a connecting rod (714) is fixed at the upper end of the first shaft sleeve (711), the connecting rod (714) is connected with the lower end of a second shaft sleeve (712) through a second universal joint (710), the second shaft sleeve (712) penetrates through a second supporting plate (706), a sliding sleeve (718) is arranged between the second shaft sleeve (712) and the second supporting plate (706), the sliding sleeve (718) is fixed on the second supporting plate (706), a handle part of the screwdriver (715) is positioned in the second shaft sleeve (712), a second waist-shaped hole (725) is arranged on the second shaft sleeve (712), a second pin shaft (719) penetrates through the second waist-shaped hole (725) and the handle part of the screwdriver (715), an eleventh spring (727) is sleeved on the screwdriver (715) between the handle part of the screwdriver (715) and the top part of the second shaft sleeve (712), and the second pin shaft rod part (719) is positioned above the second supporting plate; the third pin shaft (720) penetrates through the rod part of the screwdriver (715), the third pin shaft (720) is positioned above the second shaft sleeve (712), and the third pin shaft (720) abuts against the upper surface of the second shaft sleeve (712); the second pin shaft (719) and the third pin shaft (720) are in a cross-shaped structure; a fixing plate (721) is further fixed on the upper surface of the second supporting plate (706), and a plurality of screw chucks (14) are fixed on the fixing plate (721);

the automatic screw locking mechanisms (7) are arranged on the back of the rack table board (1) in a straight line shape, the automatic screw locking mechanisms (7) are fixed on the back of the rack table board (1) through a base (724), the screwdriver (708) faces downwards, and the screw chuck (14) faces upwards;

the screw clamp (14) comprises a base body (1401), a material inlet body (1402), a screw material inlet body (1403) and two screw clamp bodies (1404); the base body (1401) comprises four side surfaces, namely a first side surface, a second side surface, a third side surface and a fourth side surface, wherein the first side surface and the third side surface are oppositely arranged, and the second side surface and the fourth side surface are oppositely arranged; the material inlet body (1402) is arranged on the first side or the third side of the base body (1401); a first inverted U-shaped groove (1405) is formed in the second side face of the base body (1401), and a second inverted U-shaped groove is formed in the fourth side face of the base body (1401); the base body (1401) is also provided with a second through hole (1406), and the second through hole (1406) is longitudinally arranged; a screw feeding pipe (1407) is arranged on the feeding body (1402), a third through hole (1408) is arranged in the feeding body (1402), and a third inverted U-shaped groove (1409) is arranged on the side surface; the screw feeding piece (1403) consists of a first connecting head (1410) and a pipe body (1411), and the first connecting head and the pipe body are of an integrated structure; the first connecting head (1410) is embedded in the third inverted U-shaped groove (1409), a fourth pin shaft (1412) penetrates through the first connecting head (1410), and two ends of the fourth pin shaft (1412) are fixed on the feeding body (1402); wherein, the screw feed pipe (1407), the third through hole (1408) and the pipe body (1411) are communicated; the screw clamp (1404) consists of a second connector (1413), a transition part (1414) and a chuck (1415), and the second connector, the transition part and the chuck are of an integrated structure; a step (1416) is arranged on the transition part (1414), and an arc-shaped groove (1417) is arranged on the clamping head (1415); second connectors (1413) of the two screw clamping pieces (1404) are respectively embedded in the first inverted-U-shaped groove (1405) and the second inverted-U-shaped groove, a fifth pin shaft (1418) penetrates through the second connector (1413) of each screw clamping piece (1404), two ends of the fifth pin shaft (1418) are fixed on the base body (1401), and the two screw clamping pieces (1404) are arranged oppositely; the clamping heads (1415) of the two screw clamping pieces (1404) are positioned below the base body (1401), and the arc-shaped grooves (1417) of the two clamping heads (1415) which are oppositely arranged form a circular caliber; the arc-shaped groove (1417) consists of an inlet straight section (1419), a transition inclined section (1420) and an outlet straight section (1421); the caliber formed by the inlet straight sections (1419) of the two arc-shaped grooves (1417) is larger than the caliber formed by the outlet straight sections (1421) of the two arc-shaped grooves (1417); the port of the pipe body (1411) faces a circular caliber formed by the two arc-shaped grooves (1417), and the second through hole (1406) is communicated with the circular caliber;

the number of the locking mechanisms is equal to that of the screw chucks (14), and one locking mechanism corresponds to one screw chuck (14); the bit of a driver (715) is aligned with the second through hole (1406) of a screwdriver head (14);

the screw feeding mechanism (6) comprises a vibration disc (601), a straight vibration (602) and a distributor (603); the distributor (603) comprises a machine frame (616), a fourth air cylinder (604), a fifth air cylinder (605), a U-shaped trough frame (606), a material pushing block (607), a T-shaped block (608) and a plurality of first pipelines (609); the fourth cylinder (604), the fifth cylinder (605) and the U-shaped groove frame (606) are arranged on the frame (616); the U-shaped groove frame (606) is composed of a first side wall, a second side wall and a bottom wall, the first side wall and the second side wall are arranged oppositely, a plurality of straight notches (612) are formed in the first side wall, the first side wall is connected with a straight vibrator (602), and a plurality of first through holes and a baffle capable of translating are formed in the bottom wall of the U-shaped groove frame (606); the material pushing block (607) is embedded in the U-shaped groove rack (606), a plurality of grooves (613) are formed in the material pushing block (607), and one surface, close to the second side wall of the U-shaped groove rack (606), of the material pushing block (607) is a closed surface; a piston rod of the fourth cylinder (604) is connected with a material pushing block (607); a plurality of first pipelines (609) are arranged below the U-shaped groove frame (606), the upper end of each first pipeline (609) is communicated and connected with one first through hole, and the lower end of each first pipeline (609) is connected with a four-way joint (614); a first port of the four-way joint (614) is connected with the lower end of the first pipeline (609), a second port is connected with the rear end of the second pipeline (610), and a third port is connected with the rear end of the third pipeline (611); the upper surface of the T-shaped block (608) is provided with a plurality of plugs (615), and each plug (615) is plugged into the fourth port of one four-way joint (614); a piston rod of the fifth cylinder (605) is connected with the T-shaped block (608); wherein the number of straight slots (612), the number of grooves (613), the number of first through holes, the number of first ducts (609), the number of cross-ways (614) and the number of plugs (615) are equal;

the front end of the second pipe (610) is connected with the screw feed pipe (1407) of the screw chuck (14), and one second pipe (610) is only connected with one screw feed pipe (1407); the front end of the third pipeline (611) is connected with an air blowing port of the electromagnetic valve;

the 6 automatic screw locking mechanisms (7) consist of 4 first automatic screw locking mechanisms (11), 1 second automatic screw locking mechanism (12) and 1 third automatic screw locking mechanism (13); in the direction from the feeding conveyer belt (2) to the discharging conveyer belt (4), 4 first automatic screw locking mechanisms (11), 1 second automatic screw locking mechanism (12) and 1 third automatic screw locking mechanism (13) are sequentially arranged on the back of the rack table-board (1) in a straight shape;

wherein, each first automatic screw locking mechanism (11) is provided with 4 locking mechanisms and 4 screw chucks (14); 4 screw drivers (715) are arranged in 2 rows, and each row is 2; one driver (715) corresponds to one screwdriver head (14), and the tool bit of each driver (715) is opposite to the second through hole (1406) of one screwdriver head (14); the screw feeding mechanism (6) corresponding to the first automatic screw locking mechanism (11) is provided with four cross joints (614), four second pipelines (610) are respectively connected with the screw feeding pipes (1407) on the 4 screw chucks (14), and one second pipeline (610) is connected with one screw feeding pipe (1407);

wherein, in the second automatic screw locking mechanism (12), there are 4 locking mechanisms, there are 4 screw chucks (14); 4 screw drivers (715) are arranged in a straight shape; one driver (715) corresponds to one screwdriver head (14), and the tool bit of each driver (715) is opposite to the second through hole (1406) of one screwdriver head (14); the screw feeding mechanism (6) corresponding to the second automatic screw locking mechanism (12) is provided with four cross joints (614), four second pipelines (610) are respectively connected with the screw feeding pipes (1407) on the 4 screw chucks (14), and one second pipeline (610) is connected with one screw feeding pipe (1407);

wherein, in the third automatic screw locking mechanism (13), there are 2 locking mechanisms, there are 2 screw chucks (14); 2 screw drivers (715) are arranged in a straight shape; one driver (715) corresponds to one screwdriver head (14), and the tool bit of each driver (715) is opposite to the second through hole (1406) of one screwdriver head (14); the screw feeding mechanism (6) corresponding to the third automatic screw locking mechanism (13) is provided with two cross joints (614), two second pipelines (610) are respectively connected with the screw feeding pipes (1407) on the 2 screw chucks (14), and one second pipeline (610) is connected with one screw feeding pipe (1407).

2. The method for locking the 4P molded case circuit breaker base by the automatic screw locking system compatible with various molded case circuit breaker bases as recited in claim 1 is characterized in that:

step 1, when a 4P molded case circuit breaker base (18) assembled with a part product is sent to a first slotted hole unit (3-1) in the direction from a feeding conveyer belt (2) to a discharging conveyer belt (4), a piston rod of a first third cylinder (502) extends out of a downward pushing block (504), the pressing block (504) presses a fixed block (505) and a first positioning clamp (801) downwards, so that the first positioning clamp (801) is matched with the 4P molded case circuit breaker base (18) assembled with the part product, and specifically, a 1 st first polar groove (1809) from right to left at the bottom of the 4P molded case circuit breaker base (18) is embedded in a second buckling unit of the first positioning clamp (801); a port of a straight threaded hole (1602) of a 1 st locking hole from right to left of a first inlet wire screw lower hole group (1801) is sleeved on a sixth positioning pin (2204) of a first positioning clamp (801); the ports of straight threaded holes (1602) of a first static contact screw lower hole group (1802) are respectively sleeved on two seventh positioning pins (2205) of a first positioning clamp (801); the port of a 1 st first positioning hole (1807) of a 4P molded case circuit breaker base (18) from right to left is sleeved on a third positioning column (2208) of a first positioning clamp (801); a 1 st locking hole from right to left is formed in a first outlet screw lower hole group (1806), and a port of a straight threaded hole (1602) of the first outlet screw lower hole group is sleeved on an eighth positioning pin (2206) of the first positioning clamp (801); the ports of straight threaded holes (1602) of a first conductive double-gold screw lower hole group (1805) are respectively sleeved on two ninth positioning pins (2207) of a first positioning clamp (801); the port of the 1 st second positioning hole (1808) of the 4P molded case circuit breaker base (18) from right to left is sleeved on the fourth positioning column (2209) of the first positioning clamp (801);

from pay-off conveyer belt (2) to ejection of compact conveyer belt (4) on the direction, the hole that first automatic lock screw mechanism (11) lock attaches is: a first static contact screw lower hole group (1802) comprises a first locking hole and a second locking hole from right to left, and a first conductive dual-gold screw lower hole group (1805) comprises a first locking hole and a second locking hole from right to left;

step 2, when the 4P molded case circuit breaker base (18) assembled with the part product is sent to the second slotted hole unit (3-1) in the direction from the feeding conveyor belt (2) to the discharging conveyor belt (4), a piston rod of the second third cylinder (502) extends out of the downward pushing block (504), the pressing block (504) presses the fixing block (505) and the second positioning clamp (802) downwards, so that the second positioning clamp (802) is matched with the 4P molded case circuit breaker base (18) assembled with the part product, and specifically, a 2 nd first polar groove (1809) from right to left at the bottom of the 4P molded case circuit breaker base (18) is embedded in a second buckling unit of the second positioning clamp (802); a 2 nd locking hole from right to left of the first inlet wire screw lower hole group (1801), wherein the port of a straight threaded hole (1602) is sleeved on a sixth positioning pin (2204) of the second positioning clamp (802); the ports of straight threaded holes (1602) of the 3 rd and 4 th locking holes of the first static contact screw lower hole group (1802) from right to left are respectively sleeved on two seventh positioning pins (2205) of the second positioning clamp (802); the port of the 1 st first positioning hole (1807) of the 4P molded case circuit breaker base (18) from right to left is sleeved on the third positioning column (2208) of the second positioning fixture (802); a 2 nd locking hole from right to left of a first outlet screw lower hole group (1806), wherein the port of a straight threaded hole (1602) is sleeved on an eighth positioning pin (2206) of a second positioning clamp (802); the ports of straight threaded holes (1602) of the first conductive double-gold screw lower hole group (1805) are respectively sleeved on two ninth positioning pins (2207) of the second positioning clamp (802); the port of the 1 st second positioning hole (1808) of the 4P molded case circuit breaker base (18) from right to left is sleeved on the fourth positioning column (2209) of the second positioning clamp (802);

from pay-off conveyer belt (2) to ejection of compact conveyer belt (4) on the direction, the hole that second first automatic lock screw mechanism (11) lock attaches is: a first static contact screw lower hole group (1802) comprises a third locking hole and a fourth locking hole from right to left, and a first conductive dual-gold screw lower hole group (1805) comprises a third locking hole and a fourth locking hole from right to left;

step 3, when the 4P molded case circuit breaker base (18) assembled with the part product is sent to the third slotted hole unit (3-1) in the direction from the feeding conveyor belt (2) to the discharging conveyor belt (4), a piston rod of a third air cylinder (502) extends out of a downward pushing block (504), the pressing block (504) presses a fixing block (505) and a third positioning clamp (803) downwards, so that the third positioning clamp (803) is matched with the 4P molded case circuit breaker base (18) assembled with the part product, and specifically, a 3 rd first polar groove (1809) from right to left at the bottom of the 4P molded case circuit breaker base (18) is embedded in a second buckling unit of the third positioning clamp (803); a 3 rd locking hole from right to left is formed in a first inlet wire screw lower hole group (1801), and the port of a straight threaded hole (1602) of the first inlet wire screw lower hole group is sleeved on a sixth positioning pin (2204) of a third positioning clamp (803); the 5 th and 6 th locking holes from right to left of the first static contact screw lower hole group (1802), and the ports of the straight threaded holes (1602) of the two locking holes are respectively sleeved on two seventh positioning pins (2205) of the third positioning clamp (803); the port of a 3 rd first positioning hole (1807) of a 4P molded case circuit breaker base (18) from right to left is sleeved on a third positioning column (2208) of a third positioning fixture (803); a 3 rd locking hole from right to left is formed in a first outlet screw lower hole group (1806), and a port of a straight threaded hole (1602) of the first outlet screw lower hole group is sleeved on an eighth positioning pin (2206) of a third positioning clamp (803); the 5 th and 6 th locking holes from right to left of the first conductive double-gold screw lower hole group (1805), and the ports of the straight threaded holes (1602) of the two locking holes are respectively sleeved on the two ninth positioning pins (2207) of the third positioning fixture (803); the port of a 3 rd second positioning hole (1808) of a 4P molded case circuit breaker base (18) from right to left is sleeved on a fourth positioning column (2209) of the third positioning fixture (803);

from pay-off conveyer belt (2) to the direction of ejection of compact conveyer belt (4), the hole that third automatic lock screw mechanism (11) lock attaches is: a first static contact screw lower hole group (1802) comprises a fifth locking hole and a sixth locking hole from right to left, and a first conductive dual-gold screw lower hole group (1805) comprises a fifth locking hole and a sixth locking hole from right to left;

step 4, when the 4P molded case circuit breaker base (18) assembled with the part product is sent to the fourth slotted hole unit (3-1) in the direction from the feeding conveyor belt (2) to the discharging conveyor belt (4), a piston rod of a fourth third cylinder (502) extends out of a downward pushing block (504), the pressing block (504) presses a fixed block (505) and a fourth positioning clamp (804) downwards, so that the fourth positioning clamp (804) is matched with the 4P molded case circuit breaker base (18) assembled with the part product, and specifically, a 4 th first polar groove (1809) from right to left at the bottom of the 4P molded case circuit breaker base (18) is embedded in a second buckling unit of the fourth positioning clamp (804); the 4 th locking hole from right to left of the first inlet wire screw lower hole group (1801) is sleeved with the port of a straight threaded hole (1602) on a sixth positioning pin (2204) of the fourth positioning clamp (804); the 7 th and 8 th locking holes from right to left of the first static contact screw lower hole group (1802) are respectively sleeved with the ports of straight threaded holes (1602) of the two locking holes on two seventh positioning pins (2205) of the fourth positioning clamp (804); the port of a 3 rd first positioning hole (1807) of a 4P molded case circuit breaker base (18) from right to left is sleeved on a third positioning column (2208) of a fourth positioning clamp (804); a 4 th locking hole from right to left is formed in a first outlet screw lower hole group (1806), and a port of a straight threaded hole (1602) of the first outlet screw lower hole group is sleeved on an eighth positioning pin (2206) of the fourth positioning clamp (804); the 7 th and 8 th locking holes from right to left of the first conductive double-gold screw lower hole group (1805) are respectively sleeved with the ports of straight threaded holes (1602) of the two locking holes on two ninth positioning pins (2207) of the fourth positioning clamp (804); the port of a 3 rd second positioning hole (1808) of the 4P molded case circuit breaker base (18) from right to left is sleeved on a fourth positioning column (2209) of the fourth positioning clamp (804);

from pay-off conveyer belt (2) to the direction of ejection of compact conveyer belt (4), the hole that fourth automatic lock screw mechanism (11) lock attaches is: the first static contact screw lower hole group (1802) comprises a seventh locking hole and an eighth locking hole from right to left, and the first conductive dual-gold screw lower hole group (1805) comprises a seventh locking hole and an eighth locking hole from right to left;

step 5, when the 4P molded case circuit breaker base (18) assembled with the part product is sent to the fifth slotted hole unit (3-1) in the direction from the feeding conveyor belt (2) to the discharging conveyor belt (4), a piston rod of the fifth third cylinder (502) extends out of the downward pushing block (504), the pressing block (504) presses the fixing block (505) and the fifth positioning clamp (805) downward, so that the fifth positioning clamp (805) is matched with the 4P molded case circuit breaker base (18) assembled with the part product, and specifically, 4 first polar grooves (1809) at the bottom of the 4P molded case circuit breaker base (18) are embedded in 4 first buckling units of the five positioning clamp (805); 4 locking holes of a first outlet screw lower hole group (1806), wherein the ports of straight threaded holes (1602) are sleeved on 4 first positioning pins (2105) on 4 first bosses (2102); 8 locking holes of a first conductive double-gold screw lower hole group (1805), and the ports of straight threaded holes (1602) of the locking holes are sleeved on 8 second positioning pins (2106) on 4 first bosses (2102); 4 locking holes of a first conductive system hot element screw lower hole group (1804), and the port of a straight threaded hole (1602) of the 4 locking holes is sleeved on 4 third positioning pins (2107) on 4 second bosses (2103); in 4 locking holes of the first inlet wire screw lower hole group (1801), the port of a straight threaded hole (502) is sleeved on 4 fourth positioning pins (2108) on 4 third bosses (2104); 8 locking holes of the first fixed contact screw lower hole group (1802), and the ports of straight threaded holes (1602) of the 8 locking holes are sleeved on 8 fifth positioning pins (2109) on 4 third bosses (2104); a first positioning hole (1807) in a 4P molded case circuit breaker base (18) is sleeved on the second positioning column (2111), and a second positioning hole (1808) is sleeved on the first positioning column (2110);

the holes locked by the second automatic screw locking mechanism (12) are as follows: 4 locking holes of a first conductive system hot element screw lower hole set (1804);

step 6, when the 4P molded case circuit breaker base (18) assembled with the part product is sent to the sixth slotted hole unit (3-1) in the direction from the feeding conveyor belt (2) to the discharging conveyor belt (4), a piston rod of the sixth third cylinder (502) extends out of the downward pushing block (504), the pressing block (504) presses the fixing block (505) and the sixth positioning clamp (806) downwards, so that the sixth positioning clamp (806) is matched with the 4P molded case circuit breaker base (18) assembled with the part product, and specifically, a 2 nd first polar groove (1809) from right to left at the bottom of the 4P molded case circuit breaker base (18) is embedded in a second buckling unit of the sixth positioning clamp (806); a 2 nd locking hole from right to left of the first inlet wire screw lower hole group (1801), wherein a port of a straight threaded hole (1602) is sleeved on a sixth positioning pin (2204) of a sixth positioning clamp (806); the ports of straight threaded holes (1602) of the 3 rd and 4 th locking holes of the first static contact screw lower hole group (1802) from right to left are respectively sleeved on two seventh positioning pins (2205) of a sixth positioning clamp (806); the port of the 1 st first positioning hole (1807) of the 4P molded case circuit breaker base (18) from right to left is sleeved on the third positioning column (2208) of the sixth positioning clamp (806); a 2 nd locking hole from right to left is formed in a first outlet screw lower hole group (1806), and a port of a straight threaded hole (1602) of the first outlet screw lower hole group is sleeved on an eighth positioning pin (2206) of a sixth positioning clamp (806); the ports of straight threaded holes (1602) of the first conductive double-gold screw lower hole group (1805) are respectively sleeved on two ninth positioning pins (2207) of a sixth positioning clamp (806); the port of the 1 st second positioning hole (1808) of the 4P molded case circuit breaker base (18) from right to left is sleeved on the fourth positioning column (2209) of the sixth positioning clamp (806);

the holes locked by the third automatic screw locking mechanism (13) are as follows: 2 locking holes of a first frame screw lower hole group (1803).

3. The method for locking the 3P molded case circuit breaker base by the automatic screw locking system compatible with various molded case circuit breaker bases as recited in claim 1 is characterized in that:

step 1, when a 3P molded case circuit breaker base (19) assembled with a part product is conveyed to a first slotted hole unit (3-1) in the direction from a feeding conveyor belt (2) to a discharging conveyor belt (4), a piston rod of a first third cylinder (502) extends out of a downward pushing block (504), the pressing block (504) presses a fixing block (505) and a first positioning clamp (801) downwards, so that the first positioning clamp (801) is matched with the 3P molded case circuit breaker base (19) assembled with the part product, and specifically, a 1 st second polar groove (1909) from right to left at the bottom of the 3P molded case circuit breaker base (19) is embedded in a second buckling unit of the first positioning clamp (801); a port of a straight threaded hole (1602) of a 1 st locking hole in a second inlet wire screw lower hole group (1901) from right to left is sleeved on a sixth positioning pin (2204) of the first positioning clamp (801); the 1 st and 2 nd locking holes from right to left in the second static contact screw lower hole group (1902), and the ports of the straight threaded holes (1602) of the two locking holes are respectively sleeved on the two seventh positioning pins (2205) of the first positioning clamp (801); the port of the 1 st third positioning hole (1907) of the 3P molded case circuit breaker base (19) from right to left is sleeved on a third positioning column (2208) of the first positioning clamp (801); a 1 st locking hole from right to left is formed in a second outlet screw lower hole group (1906), and a port of a straight threaded hole (1602) of the second outlet screw lower hole group is sleeved on an eighth positioning pin (2206) of the first positioning clamp (801); the ports of straight threaded holes (1602) of the second conductive double-gold screw lower hole group (1905) are respectively sleeved on two ninth positioning pins (2207) of the first positioning clamp (801); the port of the 1 st fourth positioning hole (1908) of the 3P molded case circuit breaker base (19) from right to left is sleeved on a fourth positioning column (2209) of the first positioning clamp (801);

from pay-off conveyer belt (2) to ejection of compact conveyer belt (4) on the direction, the hole that first automatic lock screw mechanism (11) lock attaches is: the first locking hole and the second locking hole are arranged in a second static contact screw lower hole group (1902) from right to left, and the first locking hole and the second locking hole are arranged in a second conductive dual-gold screw lower hole group (1905) from right to left;

step 2, when the 3P molded case circuit breaker base (19) assembled with the part product is conveyed to the second slotted hole unit (3-1) in the direction from the feeding conveyor belt (2) to the discharging conveyor belt (4), a piston rod of the second third air cylinder (502) extends out of the downward pushing block (504), the pressing block (504) presses the fixing block (505) and the second positioning clamp (802) downwards, so that the second positioning clamp (802) is matched with the 3P molded case circuit breaker base (19) assembled with the part product, and specifically, a 2 nd second polar groove (1909) from right to left at the bottom of the 3P molded case circuit breaker base (19) is embedded in a second buckling unit of the second positioning clamp (802); a 2 nd locking hole from right to left of a second inlet wire screw lower hole group (1901), wherein the port of a straight threaded hole (1602) is sleeved on a sixth positioning pin (2204) of a second positioning clamp (802); the ports of straight threaded holes (1602) of the second static contact screw lower hole group (1902) are respectively sleeved on two seventh positioning pins (2205) of the second positioning clamp (802); the port of the 1 st third positioning hole (1907) of the 3P molded case circuit breaker base (19) from right to left is sleeved on a third positioning column (2208) of the second positioning fixture (802); a 2 nd locking hole from right to left in a second outlet screw lower hole group (1906), wherein the port of a straight threaded hole (1602) is sleeved on an eighth positioning pin (2206) of the second positioning clamp (802); the ports of straight threaded holes (1602) of the second conductive double-gold screw lower hole group (1905) are respectively sleeved on two ninth positioning pins (2207) of the second positioning clamp (802); the port of the 1 st fourth positioning hole (1908) of the 3P molded case circuit breaker base (19) from right to left is sleeved on a fourth positioning column (2209) of the second positioning fixture (802);

from pay-off conveyer belt (2) to ejection of compact conveyer belt (4) on the direction, the hole that second first automatic lock screw mechanism (11) lock attaches is: a second static contact screw lower hole group (1902) is provided with a third locking hole and a fourth locking hole from right to left, and a second conductive dual-gold screw lower hole group (1905) is provided with a third locking hole and a fourth locking hole from right to left;

step 3, when the 3P molded case circuit breaker base (19) assembled with the part product is sent to the third slotted hole unit (3-1) in the direction from the feeding conveyer belt (2) to the discharging conveyer belt (4), the base pressing unit corresponding to the third slotted hole unit (3-1), the screw feeding mechanism (6) and the third first automatic screw locking mechanism (11) do not act;

step 4, when the 3P molded case circuit breaker base (19) assembled with the part product is conveyed to the fourth slotted hole unit (3-1) in the direction from the feeding conveyor belt (2) to the discharging conveyor belt (4), a piston rod of a fourth third cylinder (502) extends out of a downward pushing block (504), the pressing block (504) presses a fixed block (505) and a fourth positioning clamp (804) downwards, so that the fourth positioning clamp (804) is matched with the 3P molded case circuit breaker base (19) assembled with the part product, and specifically, a 3 rd second polar groove (1909) from right to left in the bottom of the 3P molded case circuit breaker base (19) is embedded in a second buckling unit of the fourth positioning clamp (804); a 3 rd locking hole from right to left is formed in the second inlet wire screw lower hole group (1901), and the port of the straight threaded hole (1602) is sleeved on a sixth positioning pin (2204) of the fourth positioning clamp (804); the 5 th and 6 th locking holes from right to left of the second lower static contact screw hole group (1902), and the ports of the straight threaded holes (1602) of the two locking holes are respectively sleeved on two seventh positioning pins (2205) of the fourth positioning clamp (804); the port of a 2 nd third positioning hole (1907) of the 3P molded case circuit breaker base (19) from right to left is sleeved on a third positioning column (2208) of the fourth positioning fixture (804); a 3 rd locking hole from right to left is formed in the second outlet screw lower hole group (1906), and a port of the straight threaded hole (1602) is sleeved on an eighth positioning pin (2206) of the fourth positioning clamp (804); the 5 th and 6 th locking holes of the second conductive double-gold screw lower hole group (1905) from right to left are respectively sleeved on two ninth positioning pins (2207) of the fourth positioning clamp (804) through the ports of straight threaded holes (1602) of the two locking holes; the port of a 2 nd fourth positioning hole (1908) of the 3P molded case circuit breaker base (19) from right to left is sleeved on a fourth positioning column (2209) of the fourth positioning clamp (804);

from pay-off conveyer belt (2) to the direction of ejection of compact conveyer belt (4), the hole that fourth automatic lock screw mechanism (11) lock attaches is: a second stationary contact screw lower hole group (1902) is provided with a fifth locking hole and a sixth locking hole from right to left, and a second conductive dual-gold screw lower hole group (1905) is provided with a fifth locking hole and a sixth locking hole from right to left;

step 5, when the 3P molded case circuit breaker base (19) assembled with the part product is sent to the fifth slotted hole unit (3-1) in the direction from the feeding conveyor belt (2) to the discharging conveyor belt (4), a piston rod of the fifth third cylinder (502) extends out of the downward pushing block (504), the pressing block (504) presses the fixing block (505) and the fifth positioning clamp (805) downward, so that the fifth positioning clamp (805) is matched with the 3P molded case circuit breaker base (19) assembled with the part product, specifically, 3 second pole grooves (1909) at the bottom of the 3P molded case circuit breaker base (19) are embedded in 3 first buckling units of the fifth positioning clamp (805), and the other 1 first buckling unit is empty; wherein, the port of the straight threaded hole (1602) of 3 locking holes of the second outlet screw lower hole group (1906) is sleeved on 3 first positioning pins (2105) on 3 first bosses (2102); 6 locking holes of a second conductive double-gold screw lower hole group (1905), and the ports of straight threaded holes (1602) of the second conductive double-gold screw lower hole group are sleeved on 6 second positioning pins (2106) on 3 first bosses (2102); 3 locking holes of a lower hole group (1904) of a second conduction system thermal element screw, wherein the port of a straight threaded hole (1602) is sleeved on 3 third positioning pins (2107) on 3 second bosses (2103); 3 locking holes of the second inlet screw lower hole group (1901), wherein the port of the straight threaded hole (1602) is sleeved on 3 fourth positioning pins (2108) on 3 third bosses (2104); in the 6 locking holes of the second lower fixed contact screw hole group (1902), the ports of the straight threaded holes (1602) are sleeved on 6 fifth positioning pins (2109) on 3 third bosses (2104); a third positioning hole (1907) of the 3P molded case circuit breaker base (19) is sleeved on the second positioning column (2111), and a fourth positioning hole (1908) is sleeved on the first positioning column (2110);

the holes locked by the second automatic screw locking mechanism (12) are as follows: 3 locking holes of a second conductive system hot element screw lower hole set (1904); because the second automatic screw locking mechanism (12) is provided with four locking mechanisms and four screw chucks (14), the four screw chucks (14) are arranged in a straight line, but only three locking mechanisms and the three corresponding screw chucks (14) act to lock, and the remaining one locking mechanism and the corresponding screw chuck (14) do not act;

step 6, when the 3P molded case circuit breaker base (19) assembled with the part product is conveyed to the sixth slotted hole unit (3-1) in the direction from the feeding conveyor belt (2) to the discharging conveyor belt (4), a piston rod of the sixth third cylinder (502) extends out of the downward pushing block (504), the pressing block (504) presses the fixing block (505) and the sixth positioning clamp (806) downwards, so that the sixth positioning clamp (806) is matched with the 3P molded case circuit breaker base (19) assembled with the part product, and specifically, a 2 nd second polar groove (1909) from right to left at the bottom of the 3P molded case circuit breaker base (19) is embedded in a second buckling unit of the sixth positioning clamp (806); a 2 nd locking hole from right to left of the second inlet wire screw lower hole group (1901), and the port of the straight threaded hole (1602) is sleeved on a sixth positioning pin (2204) of the sixth positioning clamp (806); the ports of straight threaded holes (1602) of the second static contact screw lower hole group (1902) are respectively sleeved on two seventh positioning pins (2205) of a sixth positioning clamp (806); the port of the 1 st third positioning hole (1907) of the 3P molded case circuit breaker base (19) from right to left is sleeved on a third positioning column (2208) of the sixth positioning clamp (806); a 2 nd locking hole from right to left in the second outlet screw lower hole group (1906), wherein the port of the straight threaded hole (1602) is sleeved on an eighth positioning pin (2206) of the sixth positioning clamp (806); the ports of straight threaded holes (1602) of the second conductive double-gold screw lower hole group (1905) are respectively sleeved on two ninth positioning pins (2207) of a sixth positioning clamp (806); the port of the 1 st fourth positioning hole (1908) of the 3P molded case circuit breaker base (19) from right to left is sleeved on a fourth positioning column (2209) of the sixth positioning clamp (806);

the holes locked by the third automatic screw locking mechanism (13) are as follows: 2 locking holes of a second rack screw lower hole group (1903).

4. The method for locking the 2P molded case circuit breaker base by the automatic screw locking system compatible with various molded case circuit breaker bases as recited in claim 1 is characterized in that:

step 1, when a 2P molded case circuit breaker base (20) assembled with a part product is conveyed to a first slotted hole unit (3-1) in the direction from a feeding conveyor belt (2) to a discharging conveyor belt (4), a piston rod of a first third cylinder (502) extends out of a downward pushing block (504), the pressing block (504) presses a fixed block (505) and a first positioning clamp (801) downwards, so that the first positioning clamp (801) is matched with the 2P molded case circuit breaker base (20) assembled with the part product, and specifically, a 1 st third polar groove (2009) from right to left in the bottom of the 2P molded case circuit breaker base (20) is embedded in a second buckling unit of the first positioning clamp (801); the port of a straight threaded hole (1602) of a 1 st locking hole from right to left of a third inlet screw lower hole group (2001) is sleeved on a sixth positioning pin (2204) of the first positioning clamp (801); the 1 st and 2 nd locking holes from right to left of the third static contact screw lower hole group (2002) are respectively sleeved with the ports of straight threaded holes (1602) of the two locking holes on two seventh positioning pins (2205) of the first positioning clamp (801); the port of a fifth positioning hole (2007) of the 2P molded case circuit breaker base (20) is sleeved on a third positioning column (2208) of the first positioning clamp (801); a 1 st locking hole from right to left is formed in a third outgoing screw lower hole group (2006), and a port of a straight threaded hole (1602) of the third outgoing screw lower hole group is sleeved on an eighth positioning pin (2206) of the first positioning clamp (801); the ports of straight threaded holes (1602) of the first conductive double-gold screw lower hole group (2005) are respectively sleeved on two ninth positioning pins (2207) of the first positioning clamp (801); a port of a sixth positioning hole (2008) of the 2P molded case circuit breaker base (20) is sleeved on a fourth positioning column (2209) of the first positioning clamp (801);

from pay-off conveyer belt (2) to ejection of compact conveyer belt (4) on the direction, the hole that first automatic lock screw mechanism (11) lock attaches is: a first locking hole and a second locking hole are formed in a third static contact screw lower hole group (2002) from right to left, and a first locking hole and a second locking hole are formed in a third conductive dual-gold screw lower hole group (2005) from right to left;

step 2, when the 2P molded case circuit breaker base (20) assembled with the part product is conveyed to the second slotted hole unit (3-1) in the direction from the feeding conveyor belt (2) to the discharging conveyor belt (4), a piston rod of a second third air cylinder (502) extends out of a downward pushing block (504), the pressing block (504) presses a fixed block (505) and a second positioning clamp (802) downwards, so that the second positioning clamp (802) is matched with the 2P molded case circuit breaker base (20) assembled with the part product, and specifically, a 2 nd third polar groove (2009) from right to left at the bottom of the 2P molded case circuit breaker base (20) is embedded in a second buckling unit of the second positioning clamp (802); a 2 nd locking hole from right to left in a third lower hole group (2001) of the incoming screw is sleeved with a port of a straight threaded hole (1602) on a sixth positioning pin (2204) of the second positioning clamp (802); the 3 rd and 4 th locking holes from right to left of the third static contact screw lower hole group (2002) are respectively sleeved on two seventh positioning pins (2205) of the second positioning clamp (802) through the ports of straight threaded holes (1602) of the two locking holes; a port of a fifth positioning hole (2007) of the 2P molded case circuit breaker base (20) is sleeved on a third positioning column (2208) of the second positioning clamp (802); a 2 nd locking hole from right to left in a third outlet screw lower hole group (2006), wherein the port of a straight threaded hole (1602) is sleeved on an eighth positioning pin (2206) of the second positioning clamp (802); the 3 rd and 4 th locking holes from right to left of a third conductive double-gold screw lower hole group (2005) are respectively sleeved on two ninth positioning pins (2207) of a second positioning clamp (802) through the ports of straight threaded holes (1602) of the two locking holes; a port of a sixth positioning hole (2008) of the 2P molded case circuit breaker base (20) is sleeved on a fourth positioning column (2209) of the second positioning fixture (802);

from pay-off conveyer belt (2) to ejection of compact conveyer belt (4) on the direction, the hole that second first automatic lock screw mechanism (11) lock attaches is: a third fixed contact screw lower hole group (2002) is a third locking hole and a fourth locking hole from right to left, and a third conductive bimetal screw lower hole group (2005) is a third locking hole and a fourth locking hole from right to left;

step 3, when the 2P molded case circuit breaker base (20) assembled with the part product is sent to the third slotted hole unit (3-1) in the direction from the feeding conveyer belt (2) to the discharging conveyer belt (4), the base pressing unit corresponding to the third slotted hole unit (3-1), the screw feeding mechanism (6) and the third first automatic screw locking mechanism (11) do not act;

step 4, when the 2P molded case circuit breaker base (20) assembled with the part product is sent to the fourth slotted hole unit (3-1) in the direction from the feeding conveyer belt (2) to the discharging conveyer belt (4), the base pressing unit corresponding to the fourth slotted hole unit (3-1), the screw feeding mechanism (6) and the fourth first automatic screw locking mechanism (11) do not act;

step 5, when the 2P molded case circuit breaker base (20) assembled with the part product is sent to the fifth slotted hole unit (3-1) in the direction from the feeding conveyor belt (2) to the discharging conveyor belt (4), a piston rod of the fifth third cylinder (502) extends out of the downward pushing block (504), the pressing block (504) presses the fixing block (505) and the fifth positioning clamp (805) downward, so that the fifth positioning clamp (805) is matched with the 2P molded case circuit breaker base (20) assembled with the part product, specifically, 2 third polar grooves (2009) at the bottom of the 2P molded case circuit breaker base (20) are embedded on 2 first buckling units of the fifth positioning clamp (805), and the other 2 first buckling units are empty; the port of the straight threaded hole (1602) of 2 locking holes of the third outlet screw lower hole group (2006) is sleeved on 2 first positioning pins (2105) on 2 first bosses (2102); 4 locking holes of a third conductive double-gold screw lower hole group (2005), and the ports of straight threaded holes (1602) of the locking holes are sleeved on 4 second positioning pins (2106) on 2 first bosses (2102); 2 locking holes of a lower hole group (2004) of a third conduction system hot element screw, and the port of a straight threaded hole (1602) of the locking holes is sleeved on 2 third positioning pins (2107) on 2 second bosses (2103); 2 locking holes of a third inlet screw lower hole group (2001), wherein the ports of straight threaded holes (1602) of the 2 locking holes are sleeved on 2 fourth positioning pins (2108) on 2 third bosses (2104); 4 locking holes of a third static contact screw lower hole group (2002) are formed, and the ports of straight threaded holes (1602) of the 4 locking holes are sleeved on 4 fifth positioning pins (2109) on 2 third bosses (2104); a fifth positioning hole (2007) of the 2P molded case circuit breaker base (20) is sleeved on the second positioning column (2111), and a sixth positioning hole (2008) is sleeved on the first positioning column (2110);

the holes locked by the second automatic screw locking mechanism (12) are as follows: 2 locking holes of a third conductive system hot element screw lower hole group (2004); because the second automatic screw locking mechanism (12) is provided with four locking mechanisms and four screw chucks (14), the four screw chucks (14) are arranged in a straight line, but only two locking mechanisms and two corresponding screw chucks (14) act to lock, and the remaining two locking mechanisms and two corresponding screw chucks (14) do not act;

step 6, when the 2P molded case circuit breaker base (20) assembled with the part product is conveyed to the sixth slotted hole unit (3-1) in the direction from the feeding conveyor belt (2) to the discharging conveyor belt (4), a piston rod of a sixth third cylinder (502) extends out of a downward pushing block (504), the pressing block (504) presses a fixed block (505) and a sixth positioning clamp (806) downwards, so that the sixth positioning clamp (806) is matched with the 2P molded case circuit breaker base (20) assembled with the part product, and specifically, a 2 nd third polar groove (2009) from right to left at the bottom of the 2P molded case circuit breaker base (20) is embedded in a second buckling unit of the sixth positioning clamp (806); a 2 nd locking hole from right to left in the third lower hole group (2001) of the incoming screw is sleeved with a port of a straight threaded hole (1602) on a sixth positioning pin (2204) of a sixth positioning clamp (806); the 3 rd and 4 th locking holes from right to left of the third static contact screw lower hole group (2002) are respectively sleeved with the ports of straight threaded holes (1602) of the two locking holes on two seventh positioning pins (2205) of a sixth positioning clamp (806); a port of a fifth positioning hole (2007) of the 2P molded case circuit breaker base (20) is sleeved on a third positioning column (2208) of the sixth positioning clamp (806); a 2 nd locking hole from right to left in a third outlet screw lower hole group (2006), wherein the port of a straight threaded hole (1602) is sleeved on an eighth positioning pin (2206) of a sixth positioning clamp (806); the 3 rd and 4 th locking holes from right to left of a third conductive double-gold screw lower hole group (2005) are respectively sleeved on two ninth positioning pins (2207) of a sixth positioning clamp (806) through straight threaded holes (1602) of the two locking holes; a port of a sixth positioning hole (2008) of the 2P molded case circuit breaker base (20) is sleeved on a fourth positioning column (2209) of the sixth positioning clamp (806);

the holes locked by the third automatic screw locking mechanism (13) are as follows: and 2 locking holes of a third rack screw lower hole group (2003).

5. The method for locking the base of the molded case circuit breaker by the automatic screw locking system compatible with various molded case circuit breaker bases as claimed in claim 2, 3 or 4 is characterized in that:

step 1, when a certain pair of first air cylinders (904) clamp a molded case circuit breaker base with an assembled part product and move to a certain slotted hole unit (3-1), a base pressing unit corresponding to the slotted hole unit (3-1) works, and a third air cylinder (502) starts to press a positioning clamp downwards to ensure that the positioning clamp is matched with the molded case circuit breaker base; then the screw feeding mechanism (6) and the automatic screw locking mechanism (7) corresponding to the slotted hole unit (3-1) start to work; a plurality of screws (10) are conveyed to a distributor (603) by a direct vibration device (602), the screws (10) fall into a first pipeline (609), an air blowing port of an electromagnetic valve blows air, the screws (10) are blown into a screw feeding pipe (1407) of a screw chuck (14), the screws (10) sequentially pass through a third through hole (1408) and a pipe body (1411), and the screws (10) fall into circular calibers formed by arc-shaped grooves (1417) of two screw clamps (1404);

step 2, a sixth air cylinder (703) of the automatic screw locking mechanism (7) works, a push rod of the sixth air cylinder (703) extends out to push the first supporting plate (704) upwards, a first double ball bearing (722) moves upwards along the second sliding rod (701), the first double ball bearing (722) drives the first supporting plate (704) and an electric screwdriver (708) arranged on the first supporting plate (704) to move upwards, the electric screwdriver (708) drives a screwdriver (715) to move upwards through a transmission mechanism, a tool bit of the screwdriver (715) is inserted into a second through hole (1406) of the screwdriver chuck (14) and penetrates into an inlet straight section (1419) and a transition inclined section (1420) of the two arc-shaped grooves (1417), then the sixth air cylinder (703) stops working, the screwdriver (715) stops moving upwards, a rotating shaft of the electric screwdriver (708) rotates anticlockwise, and torsion sequentially passes through the first universal joint (709), the telescopic shaft (713) and the transition inclined section (1420), The first shaft sleeve (711), the connecting rod (714), the second universal joint (710), the second shaft sleeve (712) and the third pin shaft (720) are transmitted to the rod part of the screw driver (715) to drive the screw driver (715) to rotate anticlockwise, in the process of anticlockwise rotation of the screw driver (715), the head of the screw driver (715) finds the cross groove of the head of the screw (10) and is matched with the cross groove, after the screw driver (715) and the cross groove are matched, the screw driver (10) drives the screw (10) to rotate anticlockwise, the screw (10) automatically aligns and adjusts the position in a circular caliber formed by arc-shaped grooves (1417) in the process of anticlockwise rotation, and finally, the screw rod of the screw (10) is inserted into a caliber formed by the two outlet straight sections (1421), and the central axes of the screw driver (715) and the central axes of the two arc-shaped grooves (1417) are coincided with each; the transition part (1414) of the screw clamp (1404) is provided with a step (1416), so that the screw (10) can be prevented from jumping to the second through hole (1406);

in the process, when the sixth air cylinder (703) stops working, the first supporting plate (704) stops pressing the electric screwdriver (708) upwards, and the rotating shaft of the electric screwdriver (708) transmits anticlockwise torsion force to the screwdriver (715) through the transmission mechanism, the pressure applied to the tenth spring (726) sleeved on the telescopic shaft (713) is unchanged, and the rotating torsion force transmitted by the tenth spring (726) is also unchanged;

step 3, after the central axis of the screw (10), the central axis of the screw driver (715) and the central axis of the circular caliber formed by the two arc-shaped grooves (1417) are overlapped, the sixth air cylinder (703) is restarted, the upper pressure and the torsion are transmitted to the screw driver (715) through the transmission mechanism, the screw driver (715) continues to move upwards while rotating anticlockwise, the screw (10) is pushed upwards, the upper end of the screw rod of the screw (10) is exposed out of the screw chuck (14), along with the continuous upward rotation of the screw (10), the upper end of the screw rod of the screw (10) passes through the slotted hole (3-2) and then sequentially passes through the counter bore (1701) and the through hole (1702) on the base of the molded case circuit breaker to reach the inner oblique threaded hole (1601) of the part product, the screw driver (715) drives the screw (10) to rotate anticlockwise in the inner oblique threaded hole (1601), and the screw (, the central axis of the screw (10) and the central axis of the screwdriver (715) are coincided with the central axis of the threaded hole (16); at the moment, the screw (10) is completely ejected out of the screw chuck (14), when the head of the screw (10) passes through the caliber formed by the two outlet straight sections (1421), the head of the screw (10) pushes the outlet straight sections (1421) of the two chucks (1415) outwards, and the screw clamp (1404) rotates around the fifth pin shaft (1418), so that the head of the screw (10) completely passes through the caliber formed by the two outlet straight sections (1421);

step 4, after the central axis of the screw (10) and the central axis of the screw driver (715) coincide with the central axis of the threaded hole (16), the rotating shaft of the screwdriver (708) rotates clockwise, the screw driver (715) is driven by the transmission mechanism to rotate clockwise and upwards, the screw driver (715) drives the screw (10) to rotate clockwise in the inner oblique threaded hole (1201), the screw (10) enters the opening of the straight threaded hole (1202), and then the thread on the screw (10) is meshed with the thread in the straight threaded hole (1602);

step 5, after the threads on the screw (10) are meshed with the threads in the straight threaded hole (1602), the rotating shaft of the screwdriver (708) continues to rotate clockwise, the sixth air cylinder (703) continues to press the screwdriver (715) upwards through the transmission mechanism, and the screwdriver (715) is driven to rotate clockwise into the straight threaded hole (1602); when the rotating shaft of the electric screwdriver (708) transmits clockwise rotating torsion to the screwdriver (715) through the transmission mechanism, the tenth spring (726) compresses to receive feeding pressure, and the tenth spring (726) increases the rotating torsion by 10-20% according to the compression ratio of the tenth spring (726); the rotating torsion of the screwdriver (715) and the rotating torsion increased by the tenth spring (726) make the feeding torsion of the screw rod of the screw (10) screwed into the straight threaded hole (1602) large enough, so that the screw (10) can complete all screw threads, and the seventh air cylinder (707) does not work; if the rotating torque force of the screwdriver (715) plus the rotating torque force increased by the tenth spring (726) is not enough to overcome the locking resistance, the seventh cylinder (707) is started while the sixth cylinder (703) works, the piston rod of the seventh cylinder (707) extends to push the second support plate (706) upwards, the second double-ball bearing (723) moves upwards along the second sliding rod (701), the second support plate (706) presses the second pin shaft (719) upwards, the second pin shaft (719) presses the handle of the screwdriver (715) upwards along the second waist-shaped hole (725), the eleventh spring (727) is compressed and subjected to a feeding pressure, and the eleventh spring (727) increases the rotating torque force by 15-30% according to the compression ratio of the eleventh spring (727); under the common driving of a rotating shaft of the electric screwdriver (708), a sixth air cylinder (703) and a seventh air cylinder (707) and the common assistance of a tenth spring (726) and an eleventh spring (727), the screwdriver (715) has enough rotating torque force to overcome the locking resistance, and at the moment, the screwdriver (715) is screwed into the straight threaded hole (1602) clockwise until the screw (10) finishes all threads; then the rotating shafts of the sixth air cylinder (703), the seventh air cylinder (707) and the electric screwdriver (708) stop working, and the whole automatic locking work is completed;

and 6, finally, retracting piston rods of the sixth air cylinder (703) and the seventh air cylinder (707) to drive the electric screwdriver (708), the transmission mechanism and the screwdriver (715) to return to the initial positions.