CN214226847U - Moving contact mechanism of circuit breaker - Google Patents

Abstract

The utility model relates to a circuit breaker, especially the inside moving contact mechanism of circuit breaker. The utility model adopts the following technical scheme: a moving contact mechanism of a circuit breaker is characterized in that: the first side top of moving contact mount pad is provided with the spout, and the spout has flexion and straight portion, and the flexion is kickup being close to circuit breaker handle one side, sets up the arm of contradicting on the hasp, and this arm of contradicting locks or releases the handle connecting rod of circuit breaker with the spout matching, through adopting above-mentioned scheme, the utility model overcomes the problem that prior art exists provides a rational in infrastructure, job stabilization's neotype moving contact mechanism of circuit breaker.

Description

Moving contact mechanism of circuit breaker

Technical Field

The utility model relates to a circuit breaker, especially the inside moving contact mechanism of circuit breaker.

Background

The moving contact mechanism structure of current circuit breaker is unreasonable, appears blocking phenomenon easily, and N utmost point moving contact and L utmost point moving contact installation are unreasonable in addition, lags behind the scheduling problem easily when the dropout, appears gluing or frictional force grow scheduling problem easily between hasp and the mount pad, and the direction of rotation of last current circuit breaker handle all is the same all the time, can't realize the reversal, limits its application range.

Disclosure of Invention

The utility model overcomes the problem that prior art exists provides a rational in infrastructure, job stabilization's neotype electric leakage circuit breaker's moving contact mechanism.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a moving contact mechanism of circuit breaker, is provided with the erection column including moving contact mount pad, hasp, L utmost point moving contact and N utmost point moving contact, the both sides of moving contact mount pad just are located same axis, and L utmost point moving contact and N utmost point moving contact move about respectively and set up on the erection column of moving contact mount pad both sides, one side of moving contact mount pad installation L utmost point moving contact is first side, and one side of installation N utmost point moving contact is second side, its characterized in that: a sliding groove is arranged above the first side of the moving contact mounting seat, the sliding groove is provided with a bending part and a straight part, the bending part is bent upwards at one side close to a handle of the circuit breaker, a butting arm is arranged on the lock catch, the butting arm and the sliding groove are matched to lock or release a handle connecting rod of the circuit breaker, a boss is arranged at the periphery of the straight part of the sliding groove, a positioning block is arranged below the boss, an arc-shaped convex column is arranged at the bottom of the mounting column at the first side of the moving contact mounting seat around one circumference of the mounting column, a convex rib is arranged on the plane at the periphery of the mounting column at the first side of the moving contact mounting seat, a mounting through hole is arranged on the lock catch, the mounting through hole of the lock catch is sleeved on the mounting column at the first side and forms rotating fit with the arc-shaped convex column, an L-pole moving contact is sleeved on the mounting column at the first side, the side surface of the L-pole moving contact is abutted against or close to the end part of the arc-shaped convex column, a first bayonet is arranged on the L-pole moving contact mounting seat, and a concave cavity is arranged at the position corresponding to the first bayonet, the lower part of the boss is provided with a stop block, a limit groove is formed between the stop block and the side surface of the first side of the moving contact mounting seat, a first torsion spring is arranged between the L-pole moving contact and the moving contact mounting seat, the first torsion spring is also sleeved on the mounting column of the first side, the first torsion arm of the first torsion spring is abutted in the limit groove below the boss, the second torsion arm of the first torsion spring is abutted on the first bayonet of the L-pole moving contact, the end wall of the second torsion arm of the first torsion spring is provided with a bending part, the bending part is inserted into the cavity below the first bayonet, a positioning sheet is arranged on the L-pole moving contact, the positioning sheet is positioned between the positioning block of the moving contact mounting seat and the boss, and the positioning sheet and the abutting of the positioning block or the boss form the.

By adopting the scheme, the purpose of arranging the sliding chute is to connect with a handle connecting rod in the circuit breaker, the sliding chute is provided with a bending part and a straight part, so that one end of the handle connecting rod can be positioned by matching with the abutting arm of the lock catch, the handle connecting rod is arranged in the bending part or slides into the straight part, when one end of the handle connecting rod is arranged in the bending part, the handle of the circuit breaker is operated, the handle connecting rod can rotate the movable contact seat at the moment, particularly, the end part of the handle connecting rod is always arranged in the bending part under the action of the abutting arm, the circuit breaker is operated to be switched on, when the lock catch moves under the external action force, the abutting arm of the lock catch leaves the upper part of the bending part of the sliding chute, namely, the abutting on the handle connecting rod is lost, the handle connecting rod slides into the straight part under the action force, the rotation direction of the handle is completely opposite to that of the traditional breaker, and the problem that the original handle cannot realize switching-off and switching-on in the opposite direction is solved; the lock catch is rotationally matched with the arc-shaped convex column, a gap can be formed, dust can enter the gap, the problems of adhesion and friction increasing and blocking caused by the influence of the dust can be avoided, and the friction is reduced by the arrangement of the convex ribs; the L utmost point moving contact adopts above-mentioned mode installation very convenient, and two arms of first torsional spring are very firm fixing on the mount pad in addition, and the rotation range of injecing the L utmost point moving contact that can be fine, and the L utmost point moving contact is inseparabler with the static contact when closing a floodgate simultaneously, can rotate in advance under the circumstances of heavy current, does benefit to quick separating brake.

The utility model discloses a further setting is: a connecting column is arranged above the mounting column at the second side of the moving contact mounting seat, a convex edge is arranged around the periphery of the connecting column, an abutting surface and an abutting boss are respectively arranged on the convex edge, a third torsion spring is sleeved on the connecting column, a first torsion arm of the third torsion spring abuts against the abutting surface, a second torsion arm of the third torsion spring can abut against the abutting boss, a second stop block is arranged below the abutting boss, a positioning notch is formed between the second stop block and the side surface of the second side of the moving contact mounting seat, a second bayonet is arranged on the N-pole moving contact, a second concave cavity is arranged on the second side of the moving contact mounting seat and corresponds to the second bayonet, the N-pole moving contact is sleeved on the mounting column at the second side of the moving contact mounting seat, a second torsion spring is arranged between the N-pole moving contact and the moving contact mounting seat, and the second torsion spring is also sleeved on the mounting column at the second side of the moving contact mounting seat, the first torque arm of second torsional spring is contradicted on the location notch, the second torque arm of second torsional spring is contradicted on the second bayonet socket of N utmost point moving contact, and the second torque arm tip of second torsional spring inserts in the second cavity after buckling, be provided with the location lug on the second side of moving contact mount pad, on the N utmost point moving contact and lie in and be provided with N limit position piece between location lug and the conflict boss, N limit position piece constitutes the turned angle's of N utmost point moving contact spacing with the conflict of location lug or conflict boss.

Through adopting above-mentioned scheme, the effect of N utmost point moving contact is the same with L utmost point moving contact, the spliced pole adopts above-mentioned mode to set up in addition, its periphery is provided with the protection spliced pole that the chimb can be fine, even the spliced pole has disconnected the effect that does not influence the third torsional spring yet, conflict boss setting on the chimb can make the second conflict arm of third torsional spring conflict on the boss of contradicting temporarily, can realize mechanized installation on the lug on the base through the hypotenuse card on the base when circuit breaker base installation.

The utility model discloses a further setting is: the first torsion arm of the first torsion spring is arranged at a position, close to the stop, of the limiting groove, the width of a space, located in the first torsion arm of the first torsion spring, of the limiting groove is larger than the thickness of the L-pole moving contact, the L-pole moving contact rotates a space, located in the first torsion arm, of the limiting groove, the side edge of the positioning piece of the L-pole moving contact can be inserted into the space, located in the first torsion arm of the limiting groove, the first torsion arm of the second torsion spring is arranged at a position, close to the stop, of the positioning notch, the width of the space, located in the first torsion arm of the second torsion spring, of the positioning notch is larger than the thickness of the N-pole moving contact, and the side edge of the limiting block of the N-pole moving contact rotates a space, located in the first torsion arm of the second torsion spring, of the positioning notch, and can be inserted into the space.

Through adopting above-mentioned scheme, wherein the spacing groove adopts above-mentioned scheme setting with the first torsion arm of first torsional spring, can guarantee that the home range of spacer is not influenced, and the spacer rotates and also can not exert an influence to the torsional spring in addition, mutually noninterfere between the two, and the notch and second torsional spring and stopper are so also to be used to the principle location.

The utility model discloses a further setting is again: the utility model discloses a breaker, including moving contact mount pad, hasp, tripper ejector pin, the last spacer that just is located the L utmost point moving contact of moving contact mount pad and N limit position piece between be provided with protruding muscle or recess on the global, the below of hasp is provided with the lug, corresponds the department with the tripper ejector pin of circuit breaker on the hasp and is provided with the arc face of contradicting, the top that just is located the erection column on the hasp is provided with the inclined plane of contradicting.

By adopting the scheme, the circumferential surface of the moving contact mounting seat is provided with the convex ribs or the grooves, so that the creepage distance is increased, and the positioning sheets and the limiting blocks are relatively close to each other at the position, so that the product cannot be easily burnt; the lug is arranged for being pulled by the bimetallic pull rod, the arc-shaped abutting surface is arranged to facilitate the push of the tripper ejector rod, and the abutting inclined surface is arranged to facilitate the push of the lock catch ejector rod to the lock catch.

The last setting of utility model is: the periphery of spout bottom is provided with the recess, the downside of spout flexion and the integrative setting in side of the corresponding position on the boss constitute and support the pressure face, and the circuit breaker is closed a floodgate the back, and the link of circuit breaker handle connecting rod is contradicted on supporting the pressure face, and the contained angle that the thrust direction of the link of circuit breaker handle connecting rod and support the thrust direction between the link of pressure face to the handle connecting rod is less than 180 degrees, the top that the moving contact mount pad is located the spout is provided with divide-shut brake indicator board.

By adopting the scheme, the safety of the product is improved, dust and the like can enter the groove without influencing the movement of the handle connecting rod, the limitation of the upper abutting surface is to meet the requirement that the abutting surface stably abuts against the handle connecting rod during closing and ensure that the end part of the connecting rod can slide into the straight part of the sliding groove to realize the disconnection of the breaker when the lock catch rotates to separate from the handle connecting rod, and what needs to be described is that; the included angle between the thrust direction of the handle to the connecting end of the handle connecting rod and the thrust direction of the abutting-against surface to the connecting end of the handle connecting rod is smaller than 180 degrees, so that resultant force generated by the two forces is upward, if the upper part of the end part of the handle connecting rod is blocked by the lock catch abutting arm, the end part of the handle connecting rod is arranged in the bent part of the sliding groove and does not move, and if the lock catch abutting arm above the end part of the handle connecting rod leaves, the end part of the handle connecting rod slides into the straight part of the sliding groove under the action of the upward force, so that the brake separating is realized.

The present invention will be further described with reference to the following specific embodiments.

Drawings

Fig. 1 is a perspective view of an embodiment of the present invention;

FIG. 2 is a perspective view of a third torsion spring according to an embodiment of the present invention;

fig. 3 is a perspective view of a moving contact mounting base according to an embodiment of the present invention;

fig. 4 is a perspective view of a connecting column of a moving contact mounting seat according to an embodiment of the present invention;

fig. 5 is a perspective view of the locking device of the embodiment of the present invention cooperating with the movable contact mounting seat;

fig. 6 is a structural diagram reflecting the force generation between the handle connecting rod and the sliding chute contact surface when the breaker is switched on in the embodiment of the present invention;

FIG. 7 is a schematic view of the force direction of FIG. 6;

fig. 8 is a perspective view of the moving contact base according to the embodiment of the present invention.

Detailed Description

As shown in fig. 1-8, a moving contact mechanism of a circuit breaker includes a moving contact mounting base 1, a latch 2, an L-pole moving contact 3 and an N-pole moving contact 4, wherein mounting posts 14 are disposed on two sides of the moving contact mounting base 1 and on the same axis, the L-pole moving contact 3 and the N-pole moving contact 4 are respectively movably disposed on the mounting posts 14 on two sides of the moving contact mounting base 1, one side of the moving contact mounting base 1 where the L-pole moving contact 3 is mounted is a first side 11, one side of the moving contact mounting base 1 where the N-pole moving contact 4 is mounted is a second side 12, a chute 111 is disposed above the first side 11 of the moving contact mounting base 1, the chute 111 has a bending portion 1111 and a straight portion 1112, the bending portion 1111 is bent upward on a side close to a handle of the circuit breaker, the latch 2 is provided with a contact arm 22, the contact arm 22 is matched with the chute 111 to lock or release a handle link of the circuit breaker, a boss 112 is disposed around the straight portion 1112 of the chute 111, a positioning block 113 is arranged below the boss 112, an arc-shaped convex column 114 is arranged at the bottom of the mounting column 14 on the first side 11 of the movable contact mounting seat 1 around one circumference, a convex rib 115 is arranged on the plane of the periphery of the mounting column 14 on the first side 11 of the movable contact mounting seat 1, a mounting through hole 21 is arranged on the latch 2, the mounting through hole 21 of the latch 2 is sleeved on the first side mounting column 14 and forms a rotating fit with the arc-shaped convex column 114, the L-pole movable contact 3 is sleeved on the mounting column 14 on the first side 11 and the side surface thereof is abutted against or pressed close to the end part of the arc-shaped convex column 114, a first bayonet 31 is arranged on the L-pole movable contact 3, a concave cavity 15 is arranged on the movable contact mounting seat 1 and corresponds to the first bayonet 31, a stop 1121 is arranged below the boss 112, a limit groove 1122 is formed between the stop 1121 and the side surface of the first side 11 of the movable contact mounting seat 1, and a first torsion spring 5 is arranged between the L-pole movable contact 3 and the movable contact mounting seat 1, the first torsion spring 5 is also sleeved on the mounting column 14 of the first side 11, the first torsion arm of the first torsion spring 5 abuts against the limiting groove 1122 below the boss 112, the second torsion arm of the first torsion spring 5 abuts against the first bayonet 31 of the L-pole moving contact 3, the end wall of the second torsion arm of the first torsion spring 5 has a bending portion, the bending portion is inserted into the cavity 15 below the first bayonet 31, the L-pole moving contact 3 is provided with a positioning piece 32, the positioning piece 32 is located between the positioning block 113 and the boss 112 of the moving contact mounting seat 1, and the abutting of the positioning piece 32 and the positioning block 113 or the boss 112 constitutes the limitation of the rotation angle of the L-pole moving contact 3. By adopting the scheme, the chute 111 is arranged for connecting with a handle connecting rod in the circuit breaker, the chute 111 is provided with a bending part 1111 and a straight part 1112, so that one end of the handle connecting rod can be positioned by matching with the abutting arm 22 of the latch 2, the handle connecting rod is arranged in the bending part 1111 or slides into the straight part 1112, when one end of the handle connecting rod is arranged in the bending part 1111, the circuit breaker handle is operated, the handle connecting rod can rotate the movable contact seat 1, particularly, the end part of the handle connecting rod is arranged in the bending part 1111 all the time under the action of the abutting arm 22, the circuit breaker is operated to be switched on, when the latch 2 moves under an external action force, the abutting arm 22 of the latch 2 leaves the upper part of the bending part 1111 of the chute, namely, the abutting on the handle connecting rod is lost, the handle connecting rod slides into the straight part 1112 under the action of the side wall of the bending part 1111 and the handle, and the movable contact mounting seat 1 rotates to trip the circuit breaker, the bent portion 1111 is arranged upwards at one side close to the handle, so that the rotation direction of the handle is completely opposite to that of a traditional breaker, and the problem that the original handle cannot realize opening and closing in the opposite direction is solved; the lock catch 2 is in running fit with the arc-shaped convex column 114, a gap can be formed, dust can enter the gap, the problems of adhesion and friction increasing and blocking due to the influence of the dust can be avoided, and the arrangement of the convex rib 115 is to reduce the friction; the L pole moving contact 3 is very convenient to install by adopting the mode, in addition, two arms of the first torsion spring 5 are very firmly fixed on the mounting seat, the rotating range of the L pole moving contact 3 can be well limited, meanwhile, the L pole moving contact 3 is tighter with the static contact when the switch is switched on, and can rotate in advance under the condition of large current, so that the rapid switching-off is facilitated.

In the embodiment of the present invention, a connection column 121 is disposed above the mounting column 14 of the second side 12 of the movable contact mounting seat 1, a convex edge 1211 is disposed around a periphery of the connection column 121, an abutting surface 12111 and an abutting boss 12112 are respectively disposed on the convex edge 1211, a third torsion spring 6 is sleeved on the connection column 121, a first torsion arm of the third torsion spring 6 abuts against the abutting surface 12111, a second torsion arm of the third torsion spring 6 can abut against the abutting boss 12112, a groove can be disposed on the abutting boss 12112, the third torsion spring 6 can also abut against the groove, a second stopper 121121 is disposed below the abutting boss 12112, a positioning notch 121122 is formed between the second stopper 121121 and the side surface of the second side 12 of the movable contact mounting seat 1, a second bayonet 42 is disposed on the N-pole movable contact 4, a second cavity 16 is disposed on the second side 12 of the movable contact mounting seat 1 and corresponding to the second bayonet 42, the N-pole moving contact 4 is sleeved on the mounting column 14 of the second side 12 of the moving contact mounting seat 1, a second torsion spring 7 is arranged between the N-pole moving contact 4 and the moving contact mounting seat 1, the second torsion spring 7 is also sleeved on the mounting column 14 of the second side 12 of the moving contact mounting seat 1, a first torsion arm of the second torsion spring 7 abuts against the positioning notch 121122, a second torsion arm of the second torsion spring 7 abuts against a second bayonet 42 of the N-pole moving contact 4, an end portion of the second torsion arm of the second torsion spring 7 is bent and then inserted into the second concave cavity 16, the second side 12 of the moving contact mounting seat 1 is provided with a positioning lug 122, an N-pole limit block 41 is arranged on the N-pole moving contact 4 and between the positioning lug 122 and the abutting lug 12112, and the abutting of the N-pole limit block 41 and the positioning lug 122 or abutting lug 12112 constitutes a limit of a rotation angle of the N-pole moving contact 4; in the above-mentioned scheme, the effect of N utmost point moving contact 4 is the same basically with L utmost point moving contact, its purpose all is better combined floodgate or separating brake, spliced pole 121 adopts above-mentioned mode to set up in addition, its periphery is provided with protection spliced pole 121 that chimb 1211 can be fine, even spliced pole 121 has disconnected the effect that does not influence third torsional spring 6 yet, conflict boss 12112 setting on the chimb 1211 can make the second conflict arm of third torsional spring 6 conflict on conflict boss 12112 temporarily, its purpose can be through the hypotenuse on the base when the circuit breaker base installation on the lug of base is gone into to the second conflict arm card of torsional spring 6, can realize mechanized installation.

In the embodiment of the present invention, the first torsion arm of the first torsion spring 5 is disposed in the position of the limit slot 1122 close to the stop 1121, the space width of the limit slot 1122 in the first torsion arm of the first torsion spring 5 is greater than the thickness of the L-pole moving contact 3, the L-pole moving contact 3 can rotate its spacer 32 side to insert into the space of the limit slot 1122 in the first torsion arm, the first torsion arm of the second torsion spring 7 is disposed in the position of the positioning notch 121122 close to the stop 121121, the space width of the positioning notch 121122 in the first torsion arm of the second torsion spring 7 is greater than the thickness of the N-pole moving contact 4, and the N-pole moving contact 4 can rotate its N-pole limit block 41 side to insert into the space of the positioning notch 121122 in the first torsion arm of the second torsion spring 7; in the above scheme, the limiting groove 1122 and the first torsion arm of the first torsion spring 5 are arranged in the above scheme, so that the moving range of the positioning plate 32 is not affected, the rotation of the positioning plate 32 does not affect the torsion spring, and the positioning plate and the torsion spring do not interfere with each other, and similarly, the positioning notch 121122, the second torsion spring 7 and the N-limit limiting block 41 also have such effects.

In the embodiment of the present invention, a convex rib or a groove 17 is provided on the circumferential surface of the moving contact mounting base 1 and between the positioning plate 32 of the L-pole moving contact 3 and the limiting block 41 of the N-pole moving contact 4, so as to increase the creepage distance, and since the positioning plate 32 and the limiting block 41 are relatively close to each other at this position, the product is not easily burned; the below of hasp 2 is provided with flash barrier 23 and lug 24, and the effect of flash barrier 23 is to cut off the electric arc, and the effect of lug 24 is to supply two golden pull rod pulling, and the tripper ejector pin department of corresponding with the circuit breaker on hasp 2 is provided with arc conflict face 25, and arc conflict inclined plane 25 makes things convenient for the hasp ejector pin to push away hasp 2, the top that just is located erection column 14 on hasp 2 is provided with conflict inclined plane 26.

The embodiment of the utility model provides an in, the periphery of spout 111 bottom is provided with recess 1113, and setting up of recess 1113 can make entering such as dust, impurity, does not influence the removal of handle connecting rod, downside and the side an organic whole of the corresponding position on the boss 112 of spout flexion 1111 set up and constitute and support pressing surface 1123, and the circuit breaker is closed a floodgate after, and the link of circuit breaker handle connecting rod is contradicted on supporting pressing surface 1123, and contained angle A between the thrust direction F1 of the link of circuit breaker handle connecting rod and the direction F2 of the thrust direction of the link of supporting pressing surface 1123 to the handle connecting rod is less than 180 degrees, moving contact mount pad 1 is located the top of spout 111 and is provided with divide-shut brake indicator board 13. Through adopting above-mentioned scheme, increase the security of product, wherein the higher authority is to pressing the restriction of face 1123 and is not only to satisfy pressing the face 1123 to the firm support of handle connecting rod when closing a floodgate, also guarantees that the handle connecting rod when the hasp rotates and breaks away from the handle connecting rod, and the straight portion 1112 that the connecting rod tip can slide in spout 111 realizes the circuit breaker disconnection, and what explain here: an included angle between the thrust direction of the handle to the connecting end of the handle connecting rod and the thrust direction of the abutting surface 1123 to the connecting end of the handle connecting rod is smaller than 180 degrees, so that resultant force F3 generated by the two forces is upward, if the upper part of the end part of the handle connecting rod is blocked by the abutting arm 22 of the lock catch 2, the end part of the handle connecting rod is arranged in the bent part 1111 of the sliding groove and is not moved, and if the abutting arm 22 of the lock catch 2 above the end part of the handle connecting rod is separated, the end part of the handle connecting rod slides into the straight part 1112 of the sliding groove under the action of the upward force, and the brake is separated.

Finally, it should be noted that the terms of upper and lower positions and their relative positions as described in this document are illustrated in the accompanying drawing 1 of this document.

Claims (6)

1. The utility model provides a moving contact mechanism of circuit breaker, is provided with the erection column including moving contact mount pad, hasp, L utmost point moving contact and N utmost point moving contact, the both sides of moving contact mount pad just are located same axis, and L utmost point moving contact and N utmost point moving contact move about respectively and set up on the erection column of moving contact mount pad both sides, one side of moving contact mount pad installation L utmost point moving contact is first side, and one side of installation N utmost point moving contact is second side, its characterized in that: a sliding groove is arranged above the first side of the moving contact mounting seat, the sliding groove is provided with a bending part and a straight part, the bending part is bent upwards at one side close to a handle of the circuit breaker, a butting arm is arranged on the lock catch, the butting arm and the sliding groove are matched to lock or release a handle connecting rod of the circuit breaker, a boss is arranged at the periphery of the straight part of the sliding groove, a positioning block is arranged below the boss, an arc-shaped convex column is arranged at the bottom of the mounting column at the first side of the moving contact mounting seat around one circumference of the mounting column, a convex rib is arranged on the plane at the periphery of the mounting column at the first side of the moving contact mounting seat, a mounting through hole is arranged on the lock catch, the mounting through hole of the lock catch is sleeved on the mounting column at the first side and forms rotating fit with the arc-shaped convex column, an L-pole moving contact is sleeved on the mounting column at the first side, the side surface of the L-pole moving contact is abutted against or close to the end part of the arc-shaped convex column, a first bayonet is arranged on the L-pole moving contact mounting seat, and a concave cavity is arranged at the position corresponding to the first bayonet, the lower part of the boss is provided with a stop block, a limit groove is formed between the stop block and the side surface of the first side of the moving contact mounting seat, a first torsion spring is arranged between the L-pole moving contact and the moving contact mounting seat, the first torsion spring is also sleeved on the mounting column of the first side, the first torsion arm of the first torsion spring is abutted in the limit groove below the boss, the second torsion arm of the first torsion spring is abutted on the first bayonet of the L-pole moving contact, the end wall of the second torsion arm of the first torsion spring is provided with a bending part, the bending part is inserted into the cavity below the first bayonet, a positioning sheet is arranged on the L-pole moving contact, the positioning sheet is positioned between the positioning block of the moving contact mounting seat and the boss, and the positioning sheet and the abutting of the positioning block or the boss form the.

2. A movable contact mechanism for a circuit breaker as claimed in claim 1, wherein: a connecting column is arranged above the mounting column at the second side of the moving contact mounting seat, a convex edge is arranged around the periphery of the connecting column, an abutting surface and an abutting boss are respectively arranged on the convex edge, a third torsion spring is sleeved on the connecting column, a first torsion arm of the third torsion spring abuts against the abutting surface, a second torsion arm of the third torsion spring can abut against the abutting boss, a second stop block is arranged below the abutting boss, a positioning notch is formed between the second stop block and the side surface of the second side of the moving contact mounting seat, a second bayonet is arranged on the N-pole moving contact, a second concave cavity is arranged on the second side of the moving contact mounting seat and corresponds to the second bayonet, the N-pole moving contact is sleeved on the mounting column at the second side of the moving contact mounting seat, a second torsion spring is arranged between the N-pole moving contact and the moving contact mounting seat, and the second torsion spring is also sleeved on the mounting column at the second side of the moving contact mounting seat, the first torque arm of second torsional spring is contradicted on the location notch, the second torque arm of second torsional spring is contradicted on the second bayonet socket of N utmost point moving contact, and the second torque arm tip of second torsional spring inserts in the second cavity after buckling, be provided with the location lug on the second side of moving contact mount pad, on the N utmost point moving contact and lie in and be provided with N limit position piece between location lug and the conflict boss, N limit position piece constitutes the turned angle's of N utmost point moving contact spacing with the conflict of location lug or conflict boss.

3. A movable contact mechanism for a circuit breaker as claimed in claim 2, wherein: the first torsion arm of the first torsion spring is arranged at a position, close to the stop, of the limiting groove, the width of a space, located in the first torsion arm of the first torsion spring, of the limiting groove is larger than the thickness of the L-pole moving contact, the L-pole moving contact rotates a space, located in the first torsion arm, of the limiting groove, the side edge of the positioning piece of the L-pole moving contact can be inserted into the space, located in the first torsion arm of the limiting groove, the first torsion arm of the second torsion spring is arranged at a position, close to the stop, of the positioning notch, the width of the space, located in the first torsion arm of the second torsion spring, of the positioning notch is larger than the thickness of the N-pole moving contact, and the side edge of the limiting block of the N-pole moving contact rotates a space, located in the first torsion arm of the second torsion spring, of the positioning notch, and can be inserted into the space.

4. A movable contact mechanism of a circuit breaker according to claim 1 or 2, wherein: the utility model discloses a breaker, including moving contact mount pad, hasp, tripper ejector pin, the last spacer that just is located the L utmost point moving contact of moving contact mount pad and N limit position piece between be provided with protruding muscle or recess on the global, the below of hasp is provided with the lug, corresponds the department with the tripper ejector pin of circuit breaker on the hasp and is provided with the arc face of contradicting, the top that just is located the erection column on the hasp is provided with the inclined plane of contradicting.

5. A movable contact mechanism of a circuit breaker according to claim 1 or 2, wherein: the periphery of spout bottom is provided with the recess, the downside of spout flexion and the integrative setting in side of the corresponding position on the boss constitute and support the pressure face, and the circuit breaker is closed a floodgate the back, and the link of circuit breaker handle connecting rod is contradicted on supporting the pressure face, and the contained angle that the thrust direction of the link of circuit breaker handle connecting rod and support the thrust direction between the link of pressure face to the handle connecting rod is less than 180 degrees, the top that the moving contact mount pad is located the spout is provided with divide-shut brake indicator board.

6. A movable contact mechanism of a circuit breaker as claimed in claim 4, wherein: the periphery of spout bottom is provided with the recess, the downside of spout flexion and the integrative setting in side of the corresponding position on the boss constitute and support the pressure face, and the circuit breaker is closed a floodgate the back, and the link of circuit breaker handle connecting rod is contradicted on supporting the pressure face, and the contained angle that the thrust direction of the link of circuit breaker handle connecting rod and support the thrust direction between the link of pressure face to the handle connecting rod is less than 180 degrees, the top that the moving contact mount pad is located the spout is provided with divide-shut brake indicator board.

Images