CN212570879U

CN212570879U - Universal circuit breaker contact assembly quality

Info

Publication number: CN212570879U
Application number: CN202021728705.2U
Authority: CN
Inventors: 涂小祥; 匡红勇; 聂东东; 郑永恒; 苏洪新
Original assignee: Dongguan Keiyip Electrical Equipment Co ltd
Current assignee: Dongguan Keiyip Electrical Equipment Co ltd
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2021-02-19
Anticipated expiration: 2030-08-18

Abstract

The utility model belongs to the technical field of the circuit breaker technique and specifically relates to indicate an universal circuit breaker contact assembly quality, which comprises a frame, locate the pushing mechanism of frame, be located the contact equipment microscope carrier of pushing mechanism's below, connect in the contact sliding guide of contact equipment microscope carrier, locate the first end portion of one side of contact equipment microscope carrier and keep off the material seat and set up in the second end portion of the opposite side of contact equipment microscope carrier, first end portion keeps off the material seat and sets up with second end portion keeps off the material seat relatively, the frame is located to contact equipment microscope carrier, contact equipment microscope carrier is equipped with first spout, contact sliding guide is equipped with the second spout, the feed end of first spout and the discharge end intercommunication of second spout, between contact equipment microscope carrier and the contact sliding guide or the feed end of contact group loading platform is provided with the location lug. The utility model discloses a mode of slipping in, roll-off carries out material loading and unloading, has simplified operating procedure, has reduced intensity of labour, has improved the efficiency of assembly contact, and the position precision is high, and assembly quality is good.

Description

Universal circuit breaker contact assembly quality

Technical Field

The utility model belongs to the technical field of the circuit breaker technique and specifically relates to indicate an universal circuit breaker contact assembly quality.

Background

The universal circuit breaker contact mainly comprises a contact, a spring, a shaft, a clamping plate, a base and other parts. In order to ensure the overall miniaturization and high breaking of the circuit breaker, the contact system is often compact in overall design structure, high in matching precision among parts, large in contact pressure and difficult to assemble. Traditional assembly methods mainly are through manual assembly of workman, and not only intensity of labour is big, work efficiency is low, and the security is poor, and operator's proficiency can also influence assembly quality moreover, reduces the wholeness ability of circuit breaker. The contact system is assembled through an assembly jig in the prior art, the contact system to be assembled is placed on a front push-pull type movable material carrying platform and a rear push-pull type movable material carrying platform firstly by the existing assembly jig, then the movable material carrying platform is pushed to an assembly position for assembly, and finally the movable material carrying platform is pulled out to a specified position to take away the assembled contact system. Therefore, the drawbacks are obvious, and a solution is needed.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing an universal circuit breaker contact assembly quality.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a conventional circuit breaker contact assembly quality, its includes the frame, install in the pushing down mechanism of frame, be located the contact equipment microscope carrier of pushing down the below of mechanism, connect in the contact sliding guide of contact equipment microscope carrier, set up in the first end portion material stopping seat of one side of contact equipment microscope carrier and set up in the second end portion material stopping seat of the opposite side of contact equipment microscope carrier, first end portion material stopping seat and second end portion material stopping seat set up relatively, contact equipment microscope carrier is installed in the frame, contact equipment microscope carrier is provided with first spout, contact sliding guide is provided with the second spout, the feed end of first spout and the discharge end of second spout intercommunication, be provided with the location lug between contact equipment microscope carrier and the contact sliding guide or the feed end of contact group loading platform.

Furthermore, the contact assembling carrying platform is detachably connected with a positioning adjusting mechanism, and the positioning adjusting mechanism is in transitional connection with the positioning convex blocks in a flush mode.

Furthermore, the positioning adjusting mechanism comprises an insertion hole formed in the top surface of the contact assembling carrier and a positioning block detachably connected with the insertion hole, the positioning block comprises an insertion part and a positioning part connected with the insertion part, the insertion part is inserted into the insertion hole, the positioning part is connected with the positioning bump, and the bottom surface of the positioning part abuts against the top surface of the contact assembling carrier.

Furthermore, the pressing mechanism comprises a pressing driver arranged on the frame, a pressing block arranged at the output end of the pressing driver and a protection pad embedded on the pressing surface of the pressing block, and the pressing block is positioned above the contact assembling platform deck.

Furthermore, the pressing mechanism further comprises a connecting piece connected with the pressing block, a guide rod connected to the connecting piece and a guide sleeve arranged on the rack, and the guide rod is connected with the guide sleeve in a sliding manner.

Furthermore, a first lock hole is formed in the machine frame, and a first adjusting groove communicated with the first lock hole is formed in the bottom of the first end material blocking seat.

Furthermore, a second lock hole is formed in the machine frame, and a second adjusting groove communicated with the second lock hole is formed in the bottom of the second end material blocking seat.

Further, the first end material blocking seat is provided with a material blocking surface, the second end material blocking seat is provided with a contact block, and the contact block is provided with a contact inclined surface.

Furthermore, a limiting block is arranged at the feeding end of the contact sliding guide rail.

Further, the contact assembling carrier comprises a first bearing plate and a second bearing plate arranged in parallel with the first bearing plate, the first chute is positioned between the first bearing plate and the second bearing plate, the horizontal plane of the top surface of the first bearing plate is lower than the horizontal plane of the top surface of the second bearing plate, the contact sliding guide rail comprises a first guide rail and a second guide rail arranged in parallel with the first guide rail, the second chute is positioned between the first guide rail and the second guide rail, the horizontal plane of the top surface of the first guide rail is lower than the horizontal plane of the top surface of the second guide rail, the horizontal plane of the top surface of the first guide rail is higher than the horizontal plane of the top surface of the first bearing plate, and the horizontal plane of the top surface of the second guide rail is higher than the horizontal plane of the top surface of the second bearing plate.

The utility model has the advantages that: the utility model has the advantages of simple structure, contact sliding guide can treat the pre-stocked material of assembly contact, contact sliding guide's second spout and the first spout intercommunication and the smooth butt joint of contact equipment microscope carrier, it can only to need to slide the contact that waits to assemble that prestores on the contact sliding guide to contact equipment microscope carrier in proper order, the material loading is convenient, swiftly, treat the assembly contact through first end portion material stopping seat, second end portion material stopping seat and locating lug and fix a position, the position precision and the stability of the contact that waits to assemble are guaranteed, thereby the quality of assembly contact is guaranteed, the position of contact equipment microscope carrier is fixed, the problems such as wearing and tearing appear because contact equipment microscope carrier frequently moves, the skew are avoided, the quality of assembly contact is further improved, and the well assembled contact only need along first spout roll-off can, the ejection of compact is convenient, swiftly; the mode that the contact to be assembled slides in and the assembled contact slides out is adopted, so that the operation steps of feeding the contact to be assembled and blanking the assembled contact are simplified, the labor intensity is reduced, and the efficiency of assembling the contact is greatly improved.

Drawings

Fig. 1 is a schematic view of the three-dimensional structure of the contact and the contact to be assembled according to the present invention.

Fig. 2 is a schematic perspective view of the present invention.

Fig. 3 is the utility model discloses a contact equipment microscope carrier, positioning adjustment mechanism, first end portion keep off the material seat and the second end portion keeps off the material seat's decomposition structure schematic diagram.

Fig. 4 is a schematic perspective view of the frame and the pressing mechanism of the present invention.

Fig. 5 is a schematic perspective view of a contact to be assembled and a contact according to the present embodiment.

Description of reference numerals:

1. a frame; 2. a pressing mechanism; 21. pressing down the driver; 22. pressing the block; 23. a protection pad; 24. a connecting member; 25. a guide bar; 26. a guide sleeve; 3. a contact assembling carrying platform; 31. a first chute; 32. a first bearing plate; 33. a second carrier plate; 4. a contact sliding guide rail; 41. a second chute; 42. a limiting block; 43. a first guide rail; 44. a second guide rail; 45. a slider; 5. a first end material blocking seat; 51. a first regulating groove; 52. blocking the material surface; 6. a second end material blocking seat; 61. a second regulating groove; 62. abutting against the inclined plane; 7. positioning the bump; 8. a positioning adjustment mechanism; 81. inserting holes; 82. positioning blocks; 83. an insertion part; 84. a positioning part; 9. a contact to be assembled; 91. a contact; 92. a base; 93. a contact piece; 94. a spring; 95. a left splint; 96. a right splint; 97. a shaft; 98. the contact tails.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

As shown in fig. 1 to 5, the utility model provides a contact assembling device of a universal circuit breaker, which comprises a frame 1, a pressing mechanism 2 installed on the frame 1, a contact assembling platform 3 located below the pressing mechanism 2, a contact sliding guide 4 connected to the contact assembling platform 3, a first end material blocking seat 5 arranged on one side of the contact assembling platform 3, and a second end material blocking seat 6 arranged on the other side of the contact assembling platform 3, wherein the first end material blocking seat 5 and the second end material blocking seat 6 are oppositely arranged, the contact assembling platform 3 is installed on the frame 1, the top surface of the contact assembling platform 3 is located at a level lower than that of the top surface of the contact sliding guide 4, the contact assembling platform 3 is provided with a first chute 31, the contact sliding guide 4 is provided with a second chute 41, the feeding end of the first chute 31 is communicated with the discharging end of the second chute 41, a positioning bump 7 is arranged between the contact assembly carrier 3 and the contact sliding guide rail 4 or at the feeding end of the contact assembly carrier 3, the contact 91 is composed of a base 92, a contact piece 93, a spring 94, a left clamping plate 95, a right clamping plate 96, a shaft 97 and a contact tail 98, the contact 9 to be assembled comprises the assembled base 92, the contact piece 93, the spring 94, the shaft 97 and the contact tail 98, the bottom of the base 92 in the contact 9 to be assembled protrudes into the first sliding groove 31 or the second sliding groove 41, and the base 92 can slide in the first sliding groove 31 or the second sliding groove 41.

In practical application, a plurality of contacts 9 to be assembled are placed on the contact sliding guide rail 4 in a neatly arranged manner, when the contacts 9 to be assembled need to be assembled, a manipulator or an operator drives the contacts 9 to be assembled on the contact sliding guide rail 4 to move along the second chute 41, so that the contacts 9 to be assembled slide on the contact assembling platform 3, the contacts 9 to be assembled are positioned between the first end part material blocking seat 5 and the second end part material blocking seat 6, one end of the base 92 in the contacts 9 to be assembled abuts against the first end part material blocking seat 5, the contact tails 98 in the contacts 9 to be assembled abut against the second end part material blocking seat 6, one side of the base 92 abuts against the positioning surface of the positioning convex block 7, so as to ensure the position accuracy and stability of the contacts 9 to be assembled on the contact assembling platform 3, and then the pressing mechanism 2 works and presses the contact pieces 93 in the contacts 9 to be assembled, the contact piece 93 is made to compress the spring 94, then an operator or a mechanical hand installs corresponding holes on the left clamping plate 95 and the right clamping plate 96 on corresponding positioning positions on the shaft 97 and the base 92, and finally the pressing mechanism 2 is reset, so that the operator or the mechanical hand can slide the assembled contact 91 along the first chute 31 of the contact assembling carrier 3, the contact 91 is convenient to take away, the contact 9 to be assembled on the contact sliding guide rail 4 is convenient to move to the assembling position of the contact assembling carrier 3, the loading of the contact 9 to be assembled and the unloading of the assembled contact 91 are convenient and rapid, and the assembling efficiency is greatly improved.

The utility model has the advantages of simple structure, contact sliding guide 4 can reserve material to the contact 9 of treating the assembly, second spout 41 of contact sliding guide 4 communicates with first spout 31 of contact equipment microscope carrier 3 and smoothly docks, only need to slide the contact 9 of treating the assembly that prestores on contact sliding guide 4 to contact equipment microscope carrier 3 in proper order, the material loading is convenient, swiftly, treat the assembly contact 9 through first end portion stock stop 5, second end portion stock stop 6 and locating convex block 7 and fix a position, the position precision and the stability of contact 9 of treating the assembly are guaranteed, thereby the quality of assembly contact 91 is guaranteed, the position of contact equipment microscope carrier 3 is fixed, the problems of wearing and tearing, position excursion and the like caused by frequent movement of contact equipment microscope carrier 3 are avoided, the quality of assembly contact 91 is further improved, and the assembled contact 91 only needs to slide out along first spout 31, the discharging is convenient and fast; the mode that the contact 9 to be assembled slides in and the assembled contact 91 slides out is adopted, so that the operation steps of feeding the contact 9 to be assembled and blanking the assembled contact 91 are simplified, the labor intensity is reduced, and the efficiency of assembling the contact 91 is greatly improved.

In order to satisfy and assemble the contact 91 to different specification models, in this embodiment, contact equipment microscope carrier 3 detachably is connected with location adjustment mechanism 8,

location adjustment mechanism

8 and 7 parallel and level ground transitional coupling of location lug, location adjustment mechanism 8 is located one side that contact sliding guide 4 was kept away from to location lug 7, and location adjustment mechanism 8 can be used for prolonging location lug 7's locating surface to guarantee can fix a position different specification models treating assembly contact 9, and the commonality is good, and it is convenient to adjust, has reduced the cost of assembling the contact 91 of different specification models, has improved the utility model discloses a rate of utilization.

In this embodiment, the positioning adjustment mechanism 8 includes an insertion hole 81 provided on the top surface of the contact assembly stage 3 and a positioning block 82 detachably connected to the insertion hole 81, the positioning block 82 includes an insertion portion 83 and a positioning portion 84 connected to the insertion portion 83, the insertion portion 83 is inserted into the insertion hole 81, the positioning portion 84 is connected to the positioning bump 7, the top surface of the positioning portion 84 and the top surface of the positioning bump 7 are on the same horizontal plane, the insertion portion 83 is perpendicular to the positioning portion 84, and the bottom surface of the positioning portion 84 abuts against the top surface of the contact assembly stage 3. According to the specification and the model of the contact 91 which is actually assembled, when the specification and the model of the contact 91 are large and the positioning adjusting mechanism 8 is not needed, the positioning block 82 is detached from the insertion hole 81, and the contact 9 to be assembled is positioned through the positioning surface of the positioning bump 7; when the specification and the model of the contact 91 are smaller and the positioning adjusting mechanism 8 needs to be used, the inserting portion 83 of the positioning block 82 is inserted into the inserting hole 81, the positioning portion 84 is smoothly connected with the positioning projection 7, and at this time, one side of the positioning portion 84, which is far away from the positioning projection 7, serves as a positioning surface for positioning the contact 9 to be assembled, so that the positioning surface of the positioning portion 84 positions the contact 9 to be assembled. According to the different specification models of the contact 9 to be assembled, only the positioning blocks 82 of different specifications need to be replaced, the adjustment is convenient and efficient, the cost is low, and the positioning of the contacts 91 of different specification models is met. In the present embodiment, the positioning blocks 82 of different specifications specifically refer to the positioning portions 84 of different lengths.

In this embodiment, the pressing mechanism 2 includes a pressing driver 21 installed on the frame 1, a pressing block 22 installed on an output end of the pressing driver 21, and a protection pad 23 embedded on a pressing surface of the pressing block 22, the pressing block 22 is located above the contact assembling stage 3, the pressing driver 21 is an air cylinder, and the protection pad 23 is an elastic rubber pad.

In actual work, when the contact 9 to be assembled is located at the assembling position of the contact assembling platform 3, and the contact 9 to be assembled is located, the pressing driver 21 drives the pressing block 22 to move close to the contact 9 to be assembled until the pressing block 22 presses the contact member 93 of the contact 9 to be assembled, so that the spring 94 is compressed, in the process, the protection pad 23 is abutted against the contact member 93 of the contact 9 to be assembled, and because the protection pad 23 has elasticity, the protection pad 23 plays a role in buffering and protecting the contact member 93, so that silver spots on the contact 91 are prevented from being crushed in the assembling process, the quality of the contact 91 is further ensured, and the assembling reject ratio is reduced.

In this embodiment, the pressing mechanism 2 further includes a connecting member 24 connected to the pressing block 22, a guide rod 25 connected to the connecting member 24, and a guide sleeve 26 installed on the frame 1, wherein the guide rod 25 is slidably connected to the guide sleeve 26. In the process that the pressing driver 21 drives the pressing block 22 to move up and down, the guide rod 25 is in sliding fit with the guide sleeve 26 to play a role in guiding, and the lifting stability of the pressing block 22 is improved.

In this embodiment, the frame 1 is provided with a first lock hole, the bottom of the first end material blocking seat 5 is provided with a first adjusting groove 51 communicated with the first lock hole, and the first lock hole is a threaded hole; during the adjustment, adjust first end along the length direction of first adjustment tank 51 and keep off the position of material seat 5 in frame 1, keep off the distance between material seat 6 with the second end with the regulation first end, make first end keep off material seat 5 and second end keep off material seat 6 and can contradict the location to the contact 91 of different specification models, keep off the position control back of material seat 5 as first end, the screw thread section of screw runs through behind the first adjustment tank 51 with first lockhole threaded connection, keep off material seat 5 locking in frame 1 until the screw with first end, thereby realize keeping off material seat 5 to fix first end, it is convenient to adjust.

In this embodiment, the frame 1 is provided with a second locking hole, the bottom of the second end material blocking seat 6 is provided with a second adjusting groove 61 communicated with the second locking hole, and the second locking hole is a threaded hole. During the adjustment, adjust the position of second end material blocking seat 6 on frame 1 along the length direction of second adjustment tank 61, keep off the distance between material blocking seat 5 and the second end with the regulation first end, make first end material blocking seat 5 and second end material blocking seat 6 can contradict the location to the contact 91 of different specification models, after the position control of second end material blocking seat 6 is good, the screw thread section of screw runs through behind second adjustment tank 61 with second lockhole threaded connection, keep off material blocking seat 6 locking with the second end on frame 1 until the screw, thereby realize fixing second end material blocking seat 6, and it is convenient to adjust.

In this embodiment, the first end material blocking seat 5 is provided with a material blocking surface 52, the second end material blocking seat 6 is provided with a contact block, the contact block is provided with a contact inclined surface 62, and the contact inclined surface 62 inclines from the top to the bottom towards the direction close to the contact assembling carrier 3. Keep off material face 52 and conflict inclined plane 62 and contradict with base 92's terminal surface and contact tail 98 respectively, thereby treat to assemble contact 9 and fix a position, the stability and the position accuracy of waiting to assemble contact 9 have been guaranteed, and through setting up the conflict inclined plane 62 of outside-in slope, the angle of contact tail 98 outwards slope has been increased, make contact tail 98 can outwards slope, be convenient for improve to wait to assemble contact 9 and place the stability at contact equipment microscope carrier 3, be convenient for assemble the both sides of waiting to assemble contact 9 respectively with left splint 95 and right splint 96 to operator or manipulator, bump with contact tail 98 when preventing to push down briquetting 22.

Specifically, the contact sliding guide 4 is provided with a conveying driving mechanism, the conveying driving mechanism is located in the second chute 41, the conveying driving mechanism is used for driving the universal circuit breaker contact 91 carried on the contact sliding guide 4 to slide along the second chute 41, so that the contact 9 to be assembled slides onto the contact assembling carrier 3, and the rack 1 is provided with a control button electrically connected with the conveying driving mechanism. When the contact 9 that treats that the range was placed on contact sliding guide 4 removed when needs are carried, press control button for carry actuating mechanism drive contact sliding guide 4 on all treat that assembly contact 9 removes one and treat the position of assembly contact 9, thereby realized treating assembly contact 9 and carried out the pay-off, realized automatic pay-off, degree of automation is high, not only is convenient for the utility model discloses with the external equipment concatenation in order to form automation line, still improved the efficiency of assembly contact 91.

Specifically, the conveying driving mechanism includes a motor installed on the contact sliding guide rail 4, a driving wheel sleeved on an output shaft 97 of the motor, a driven wheel rotatably installed in the second chute 41, a conveying belt wound around the driving wheel and the driven wheel, and a plurality of material pushing blocks uniformly installed on the conveying belt, and an accommodating space for accommodating the contact 9 to be assembled is provided between two adjacent material pushing blocks.

During actual work, the motor drives the driving wheel to rotate, the conveying belt rotates in an annular mode under the driving of the driving wheel and the driven wheel, the plurality of material pushing blocks move along with the conveying belt, and the moving material pushing blocks push the to-be-assembled contact 9 located in the containing space to move so as to convey the to-be-assembled contact 9. The adjacent two material pushing blocks limit the contact 9 to be assembled, so that the position precision and the stability of the contact 9 to be assembled are ensured, and the moving precision of the contact 9 to be assembled is improved.

In this embodiment, the feed end of contact sliding guide 4 is provided with stopper 42, and stopper 42 is upwards protruding from the top surface of contact sliding guide 4, and stopper 42 plays spacing effect to waiting to assemble contact 9 on contact sliding guide 4, avoids waiting to assemble contact 9 and drops from contact sliding guide 4.

In this embodiment, the contact assembly carrier 3 includes a first carrier plate 32 and a second carrier plate 33 parallel to the first carrier plate 32, the first sliding chute 31 is located between the first bearing plate 32 and the second bearing plate 33, the horizontal plane of the top surface of the first bearing plate 32 is lower than the horizontal plane of the top surface of the second bearing plate 33, the contact sliding guide 4 comprises a first guide 43 and a second guide 44 arranged parallel to the first guide 43, the second runner 41 is located between the first rail 43 and the second rail 44, the top surface of the first rail 43 is located at a lower level than the top surface of the second rail 44, the top surface of the first guide rail 43 is located at a level higher than that of the first loading plate 32, the top surface of the second guide rail 44 is located at a level higher than that of the top surface of the second loading plate 33. The contact assembling carrier 3 and the contact sliding guide rail 4 with the structural design enable the contact 9 to be assembled to be horizontally placed on the contact assembling carrier 3 and the contact sliding guide rail 4, the distance between the first bearing plate 32 and the second bearing plate 33 is adjustable, the distance between the first guide rail 43 and the second guide rail 44 is adjustable, and therefore contacts 91 with different specifications and models can be assembled.

Specifically, a slide block 45 is detachably arranged on each of the first guide rail 43 and the second guide rail 44, and the top surface of the slide block 45 is used for supporting the contact 9 to be assembled; by additionally arranging the sliding block 45, the top surface of the sliding block 45 is used as the sliding top surface (sliding surface) of the contact sliding guide rail 4, the first guide rail 43 and the second guide rail 44 are prevented from directly contacting with the contact 9 to be assembled, and the contact sliding guide rail 4 needs to frequently slide and rub with the contact 9 to be assembled, so that the requirement on the smoothness of the top surface (sliding surface) of the contact sliding guide rail 4 is high in order to reduce the abrasion between the contact sliding guide rail 4 and the contact 9 to be assembled, when the sliding block 45 is abraded, only the sliding block 45 needs to be replaced, and the maintenance and use cost is reduced.

All the technical features in the embodiment can be freely combined according to actual needs.

The above-mentioned embodiment is the utility model discloses the implementation scheme of preferred, in addition, the utility model discloses can also realize by other modes, any obvious replacement is all within the protection scope of the utility model under the prerequisite that does not deviate from this technical scheme design.

Claims

1. The utility model provides a conventional circuit breaker contact assembly quality which characterized in that: the contact assembly loading platform comprises a rack, a pressing mechanism arranged on the rack, a contact assembly loading platform arranged below the pressing mechanism, a contact sliding guide rail connected to the contact assembly loading platform, a first end part material blocking seat arranged on one side of the contact assembly loading platform and a second end part material blocking seat arranged on the other side of the contact assembly loading platform, wherein the first end part material blocking seat and the second end part material blocking seat are arranged oppositely, the contact assembly loading platform is arranged on the rack, the contact assembly loading platform is provided with a first sliding groove, the contact sliding guide rail is provided with a second sliding groove, the feeding end of the first sliding groove is communicated with the discharging end of the second sliding groove, and a positioning convex block is arranged between the contact assembly loading platform and the contact sliding guide rail or at the feeding end of the contact.

2. A contact fitting apparatus of a conventional circuit breaker according to claim 1, wherein: the contact assembling carrying platform is detachably connected with a positioning adjusting mechanism, and the positioning adjusting mechanism is in transitional connection with the positioning convex blocks in a flush mode.

3. A contact fitting apparatus of a conventional circuit breaker according to claim 2, wherein: the positioning adjusting mechanism comprises an insertion hole formed in the top surface of the contact assembling carrying platform and a positioning block detachably connected with the insertion hole, the positioning block comprises an insertion part and a positioning part connected with the insertion part, the insertion part is inserted into the insertion hole, the positioning part is connected with the positioning bump, and the bottom surface of the positioning part is abutted against the top surface of the contact assembling carrying platform.

4. A contact fitting apparatus of a conventional circuit breaker according to claim 1, wherein: the downward pressing mechanism comprises a downward pressing driver arranged on the frame, a downward pressing block arranged at the output end of the downward pressing driver and a protection pad embedded on the downward pressing surface of the downward pressing block, and the downward pressing block is positioned above the contact assembling carrying platform.

5. A conventional circuit breaker contact mounting apparatus as claimed in claim 4, wherein: the pressing mechanism further comprises a connecting piece connected with the pressing block, a guide rod connected to the connecting piece and a guide sleeve arranged on the rack, and the guide rod is connected with the guide sleeve in a sliding mode.

6. A contact fitting apparatus of a conventional circuit breaker according to claim 1, wherein: a first lock hole is formed in the rack, and a first adjusting groove communicated with the first lock hole is formed in the bottom of the first end material blocking seat.

7. A contact fitting apparatus of a conventional circuit breaker according to claim 1, wherein: the rack is provided with a second lock hole, and a second adjusting groove communicated with the second lock hole is formed in the bottom of the second end material blocking seat.

8. A contact fitting apparatus of a conventional circuit breaker according to claim 1, wherein: the first end material blocking seat is provided with a material blocking surface, the second end material blocking seat is provided with a contact block, and the contact block is provided with a contact inclined surface.

9. A contact fitting apparatus of a conventional circuit breaker according to claim 1, wherein: and a limiting block is arranged at the feed end of the contact sliding guide rail.

10. A contact fitting apparatus of a conventional circuit breaker according to claim 1, wherein: the contact assembling carrying platform comprises a first bearing plate and a second bearing plate arranged in parallel with the first bearing plate, a first sliding groove is located between the first bearing plate and the second bearing plate, the horizontal plane of the top surface of the first bearing plate is lower than the horizontal plane of the top surface of the second bearing plate, a contact sliding guide rail comprises a first guide rail and a second guide rail arranged in parallel with the first guide rail, a second sliding groove is located between the first guide rail and the second guide rail, the horizontal plane of the top surface of the first guide rail is lower than the horizontal plane of the top surface of the second guide rail, the horizontal plane of the top surface of the first guide rail is higher than the horizontal plane of the top surface of the first bearing plate, and the horizontal plane of the top surface of the second guide rail is higher than the horizontal plane of the top surface of the second bearing plate.