A moving contact operating mechanism for a circuit breaker

Abstract

The present invention relates to a circuit breaker, in particular to a moving contact operating mechanism inside the circuit breaker. The present invention adopts the following technical solutions: A moving contact operating mechanism of a circuit breaker, an installation post is integrally arranged on the moving contact seat, a lock catch and a moving contact are both movably sleeved on the installation post, the upper end of the moving contact seat is provided with a chute for the end of the circuit breaker connecting rod to slide, the chute includes a bent part and a straight part, a resisting arm is arranged at the upper end of the lock catch, the lock catch push rod device includes a push rod and a spring, after the circuit breaker is disconnected, the front end of the push rod abuts against the side surface of the lock catch, and after the second end of the connecting rod is locked in the bent part of the chute, the handle can be pushed to close the circuit breaker. By adopting the above scheme, the present invention overcomes the problems existing in the prior art, and provides a new moving contact operating mechanism that can reduce parts through mechanical principles, and metal or plastic particles can fall into corresponding grooves or gaps without affecting the movement of the moving contact.

Description

Technical Field

[0001] The invention relates to a circuit breaker, in particular to a moving contact operating mechanism inside the circuit breaker. Background Art

[0002] Traditional circuit breaker products generally have levers, locks and trips, which are complex in structure and costly. The volume of the trip is not conducive to automated assembly, and the product has many parts, which puts the product at risk of failure. Now, a circuit breaker is designed that can reduce parts, remove the trip and reduce the tripping force of the product through the principles of mechanics and mechanics. The traditional circuit breaker product fixing mechanism uses a metal shaft. Because the metal shaft is conductive, for products with contacts on both the 1P+N or L and N poles, there is a problem of too small electrical gap between the L and N poles or a problem of withstand voltage breakdown between the L and N poles after the breaking test. Therefore, the metal shaft is not used to position the product, but the lever and the housing are used to achieve positioning. During the mechanical movement of the traditional circuit breaker lever and the moving contact, friction produces plastic or metal particles that affect the movement of the contact. Summary of the invention

[0003] The present invention overcomes the problems existing in the prior art and provides a novel moving contact operating mechanism which can reduce parts by using mechanical principles and mechanics principles, wherein metal or plastic particles can fall into corresponding grooves or gaps without affecting the movement of the moving contact.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a circuit breaker moving contact operating mechanism, comprising a handle, a lock, a lock push rod device, a moving contact seat and a moving contact, a connecting rod is arranged between the handle and the moving contact seat, a first end of the connecting rod is connected to the handle, and a second end of the connecting rod is connected to the moving contact seat, the lock and the moving contact are both arranged on the moving contact seat, and a linkage arrangement is realized between the moving contact and the moving contact seat through a torsion spring, characterized in that: a mounting column is arranged integrally with the moving contact seat, the lock and the moving contact are movably sleeved on the mounting column, and a sliding groove is arranged at the upper end of the moving contact seat for the end of the circuit breaker connecting rod to slide, The slide groove includes a curved portion and a straight portion, a resistance arm is provided at the upper end of the lock catch, and a resistance surface is provided on the resistance arm, and the lock catch push rod device includes a push rod and a spring, the spring force is on the push rod, and after the circuit breaker is disconnected, the front end of the push rod is resisted on the side surface of the lock catch, so that the resistance surface of the lock catch is close to the curved portion of the slide groove so as to lock the second end of the connecting rod in the curved portion of the slide groove, and after the second end of the connecting rod is locked in the curved portion of the slide groove, the handle can be pushed to close the circuit breaker; after the circuit breaker is closed, the tripper mechanism of the circuit breaker acts on the lock catch to rotate the lock catch, and the resistance surface loses the lock on the second end of the connecting rod, and at this time the second end of the connecting rod can slide into the straight portion of the slide groove to realize the circuit breaker opening.

[0005] By adopting the above scheme, a new method is used to lock or unlock the end of the circuit breaker connecting rod, which has a simple structure, convenient installation and reliability. In addition, through the cooperation between the contact surface of the lock buckle and the slide groove, the closing or opening of the circuit breaker can be achieved by controlling the rotation of the lock buckle, which is very practical.

[0006] A further configuration of the present invention is that: the curved portion of the slide groove is bent downward at one end close to the handle, and a limited surface and a pressure surface are arranged on the lower side of the curved portion, the limited surface is the lowest point position of the second end of the connecting rod at the curved portion of the slide groove after the circuit breaker is opened, the first end of the connecting rod connected to the handle after the circuit breaker is opened is higher than the second end of the connecting rod at the curved portion of the slide groove, and the second end of the connecting rod both abuts against the pressure surface during and after the circuit breaker is closed, at this time, the angle between the thrust direction generated by the handle on the second end of the connecting rod and the thrust direction generated by the pressure surface on the second end of the connecting rod is less than 180 degrees, and the top rod end of the lock push rod mechanism after the circuit breaker is closed is separated from the lock side; a connection for connecting is arranged on the outer side of the contact surface on the contact arm. The second end of the rod slides into the inclined surface of the curved portion of the slide groove, and a push arm is arranged above the lock and below the contact arm, and the contact arm and the push arm are forked to form a fork, and the width of the fork is greater than the diameter of the second end of the connecting rod, and the upper side of the push arm can push the second end of the connecting rod when the circuit breaker is opened to cause the second end of the connecting rod to slide into the straight portion of the slide groove; the contact arm and the push arm are staggered, and a positioning boss is arranged below the slide groove of the moving contact seat, and part of the upper side surface of the positioning boss is integrated with the lower side surface of the curved portion of the slide groove to form a pressing surface, and the pressing surface cooperates with the contact surface to lock the second end of the connecting rod of the circuit breaker so that the second end of the connecting rod of the circuit breaker is placed in the curved portion of the slide groove, and the push arm is placed on the outer side surface of the positioning boss.

[0007] The above scheme is adopted as one of the embodiments of the present invention, wherein the angle between the thrust direction generated by the handle on the second end of the connecting rod and the thrust direction generated by the pressure limit surface on the second end of the connecting rod is less than 180 degrees, so as to ensure that the lock is pushed by the top rod of the circuit breaker releaser and then rotated, and the connecting rod can smoothly slide the straight part of the slide groove to ensure that the circuit breaker can be opened. The setting of the inclined surface at the front end of the lock contact surface can well guide the end of the connecting rod to enter the curved part of the slide groove without any jamming phenomenon. The setting of the lever arm can push the end of the connecting rod to slide into the straight part of the slide groove when the circuit breaker is disconnected. What we want to explain here is that the circuit breaker opening refers to the automatic opening of the circuit breaker, not the opening of the manual operation handle, so as to ensure that the circuit breaker opening can be successful, thereby increasing the safety of the product; finally, part of the upper side surface of the positioning boss and the lower side surface of the curved part of the slide groove are integrated into a pressure surface, so that the pressure surface is relatively large, the locking end of the connecting rod will be relatively stable, thereby increasing the stability of the product, and the groove is provided around the bottom of the slide groove so that impurities such as dust can enter without affecting the movement of the end of the connecting rod.

[0008] A further arrangement of the present invention is that: the bent portion of the sliding groove bends upward at one end close to the handle, and a pressing limit surface is provided on the upper side of the bent portion. After the circuit breaker is closed, the second end of the connecting rod abuts against the pressing limit surface. At this time, the included angle between the thrust direction generated by the handle on the second end of the connecting rod and the thrust direction generated by the pressing limit surface on the second end of the connecting rod is less than 180 degrees; the abutting surface on the abutting arm is L-shaped, and a slope facilitating the sliding of the second end of the connecting rod into the bent portion is provided below the abutting surface, and a groove is provided on the abutting periphery of the sliding groove.

[0009] Adopting the above solution, the purpose of the above arrangement is that the handle can rotate in the opposite direction, so that the directions of the N pole and the L pole can be swapped compared with those in the embodiment of the present application document, meeting different requirements.

[0010] The present invention will be further described below in conjunction with specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic structural diagram of the first embodiment of the present invention;

[0012] Figure 2 It is a perspective view of the moving contact and the moving contact seat reflecting the first embodiment of the present invention;

[0013] Figure 3 It is a perspective view of the moving contact seat of the first embodiment of the present invention;

[0014] Figure 4 It is a structural diagram of the latch of the first embodiment of the present invention;

[0015] Figure 5 It is a structural diagram of the cooperation between the latch and the moving contact of the first embodiment of the present invention;

[0016] Figure 6 It is a schematic diagram of the thrusts F1, F2 and the included angle A of the first embodiment of the present invention;

[0017] Figure 7 It is a structural diagram of the cooperation between the latch and the moving contact seat at the open position of the product of the first embodiment of the present invention;

[0018] Figure 8 It is a structural diagram of the cooperation between the latch and the moving contact seat when the product of the first embodiment of the present invention just starts to close;

[0019] Figure 9 It is a structural diagram of the cooperation between the latch and the moving contact seat during the closing process of the product of the first embodiment of the present invention;

[0020] Figure 10 It is a structural diagram of the cooperation between the latch and the moving contact seat after the product of the first embodiment of the present invention is closed;

[0021] Figure 11Structural diagram of the cooperation between the locking latch and the moving contact seat when the product of Embodiment 1 of the present invention is about to trip;

[0022] Figure 12 Structural diagram of the cooperation between the locking latch and the moving contact seat when the product of the present invention is forced to trip;

[0023] Figure 13 Structural diagram of the cooperation between the locking latch and the moving contact seat during the process of the handle returning to its original position after the product of Embodiment 1 of the present invention trips;

[0024] Figure 14 Structural diagram of the cooperation between the locking latch and the moving contact seat when the moving contact of the mechanism is knocked open by the electromagnetic mechanism during a short circuit of the product of Embodiment 1 of the present invention;

[0025] Figure 15 Structural diagram of the cooperation between the locking latch and the moving contact seat when the moving contact does not return to its original position after the moving contact of the mechanism is knocked open by the electromagnetic mechanism during a short circuit of the product of Embodiment 1 of the present invention;

[0026] Figure 16 Exploded view of the locking latch push rod mechanism of Embodiment 1 of the present invention;

[0027] Figure 17 Structural diagram of Embodiment 2 of the present invention;

[0028] Figure 18 Structural diagram of Embodiment 2 reflecting the sliding groove;

[0029] Figure 19 Schematic diagram of the thrust forces F1, F2 and the included angle A in Embodiment 2 of the present invention;

[0030] Figure 20 Structural diagram of the moving contact seat of Embodiment 2 of the present invention. Detailed implementation manners

[0031] As Figures 1 - 16As shown in the figure, Embodiment 1 of the present invention relates to an operating mechanism for a moving contact of a circuit breaker, which includes a handle 6, a latch 1, a latch push rod mechanism 7, a moving contact seat 2 and a moving contact 3. A connecting rod 4 is arranged between the handle 6 and the moving contact seat 2. The first end of the connecting rod 4 is connected to the handle 6, and the second end of the connecting rod 4 is connected to the moving contact seat 2. Both the latch 1 and the moving contact 3 are arranged on the moving contact seat 2. The moving contact 3 and the moving contact seat 2 are linked through a torsion spring 5. In the embodiment of the present invention, a mounting post 21 is integrally arranged on the moving contact seat 2. Both the latch 1 and the moving contact 3 are movably sleeved on the mounting post 21. The upper end of the moving contact seat 2 is provided with a chute 211 for the end of the connecting rod 4 to slide. The chute 211 includes a bending part 2111 and a straight part 2112. The upper end of the latch 1 is provided with a resisting arm 11, and a resisting surface 111 is arranged on the resisting arm 11. The latch push rod mechanism 7 includes a spring 71 and a push rod 72. The spring 71 acts on the push rod 72. After the circuit breaker is disconnected, the front end of the push rod 72 abuts against the side surface of the latch 1, so that the resisting surface 111 of the latch 1 is close to the bending part 2111 of the chute 211 to lock the second end of the connecting rod 4 in the bending part 2111 of the chute. After the second end of the connecting rod 4 is locked in the bending part 2111 of the chute, the handle 6 can be pushed to close the circuit breaker. After the circuit breaker is closed, the tripping mechanism of the circuit breaker acts on the latch 1 to make the latch 1 rotate, and then the resisting surface 111 loses the locking of the second end of the connecting rod 4. At this time, the second end of the connecting rod 4 can slide into the straight part 2112 of the chute to realize the opening of the circuit breaker. By adopting the above scheme, a new way is used to lock or unlock the end of the connecting rod of the circuit breaker, which is simple, convenient and reliable. In addition, through the cooperation of the resisting surface 111 of the latch 1 and the chute 211, as long as the rotation of the latch 1 is controlled, it is very practical. In the above scheme, the thrust of the push rod 72 on the latch 1 can also be reduced after the latch 1 rotates, so that the requirements for the tripping mechanism are greatly reduced when tripping.

[0032] In the first embodiment of the present invention, the bent portion 2111 of the chute 211 bends downward at one end close to the handle 6. A limiting surface 21111 and a pressing surface 21112 are provided on the lower side of the bent portion. The limiting surface 21111 is the lowest point position of the second end of the connecting rod 4 in the bent portion 2111 of the chute 211 after the circuit breaker is tripped. The first end of the connecting rod 4 connected to the handle 6 is higher than the second end of the connecting rod 4 in the bent portion 2111 of the chute. During the closing process and after the closing of the circuit breaker, the second end of the connecting rod 4 abuts against the pressing surface 21112. At this time, the included angle A between the direction of the thrust F1 generated by the handle 6 on the second end of the connecting rod 4 and the direction of the thrust F2 generated by the pressing surface 21112 on the second end of the connecting rod 4 is less than 180 degrees, and the resultant force F3 they generate is upward. The end of the ejector rod 72 of the latch push rod mechanism 7 is separated from or in contact with the side surface of the latch 1 after the circuit breaker is closed. The contact thrust here is very small. By adopting the above solution, the stability of the circuit breaker during operation can be well ensured. The setting of the limiting surface 21111 and the pressing surface 21112 ensures that the handle 6 can control the connecting rod 4 during operation. The limiting surface 21111 limits the position of the second end of the connecting rod 4. If its position cannot be guaranteed, the operation cannot be carried out. The pressing surface 21112 ensures that a thrust is generated on the second end of the connecting rod 4 during the closing process and after the closing of the circuit breaker, and the direction of the thrust also needs to be properly handled. This can ensure the normal closing of the circuit breaker and the quick tripping of the latch 1 after closing. In this application document, the pressing surface 21112 can also be connected to the limiting surface 21111. The setting of the above positions also ensures that the circuit breaker can work normally.

[0033] In the first embodiment of the present invention, an inclined surface 112 for the second end of the connecting rod 4 to slide into the bent portion 2111 of the chute 211 is provided on the outer side of the contact arm 11 at the contact surface 111. A dialing arm 12 is provided above the latch 1 and below the contact arm 11. The contact arm 11 and the dialing arm 12 are arranged in a forked manner to form a fork opening. The width of the fork opening is greater than the diameter of the second end of the connecting rod 4. The upper side surface of the dialing arm 12 can dial the second end of the connecting rod 4 to cause the second end of the connecting rod 4 to slide into the straight portion 2112 of the chute when the circuit breaker is tripped. By adopting the above solution, the inclined surface 112 ensures that the second end of the connecting rod 4 can smoothly reset to the bent portion 2111 after tripping for subsequent operations. In fact, the inclined surface 112 can also not be provided, and only an arc-shaped transition surface is provided at the end of the contact surface 111, as long as it can allow the second end of the connecting rod 4 to enter the bent portion 2111. The width of the fork opening ensures smooth tripping. The function of the dialing arm 12 is that in case the connecting rod 4 is stuck during tripping, the dialing arm 12 can play a role in dialing the second end of the connecting rod 4 to ensure smooth tripping and prevent dangerous situations from occurring.

[0034] In the first embodiment of the present invention, the contact arm 11 and the lever arm 12 are staggered, and a positioning boss 22 is provided below the slide slot 211 of the movable contact seat 2. Part of the upper side surface of the positioning boss 22 and the lower side surface of the curved portion of the slide slot 211 are integrated to form a pressing surface 21112. The pressing surface 21112 cooperates with the contact surface 111 to lock the second end of the connecting rod 4 of the circuit breaker so that the second end of the connecting rod 4 of the circuit breaker is placed in the curved portion 2111 of the slide slot, and the lever arm 12 is placed on the outer side surface of the positioning boss 22. A groove 2113 is provided around the bottom of the slide slot 211. By adopting the above solution, the structure is compact. In addition, part of the upper side surface of the positioning boss 22 and the lower side surface of the curved portion 2111 are integrated to form a pressing surface 21112, which greatly increases the area of ​​the pressing surface 21112, so that the pressing force is better and the product performance is more stable.

[0035] like Figure 17 — Figure 20 As shown, in the second embodiment of the present invention, the curved portion 2111' of the slide 211' is curved upward at one end close to the handle 6, and a pressure limiting surface 21112' is provided on the upper side of the curved portion 2111'. After the circuit breaker is closed, the second end of the connecting rod 4 contacts the pressure limiting surface 21112'. At this time, the angle A between the thrust direction F1 generated by the handle 6 on the second end of the connecting rod 4 and the thrust direction F2 generated by the pressure limiting surface 21112' on the second end of the connecting rod 4 is less than 180 degrees, so that the resultant force F3 generated by them is downward. The contact surface 111' on the lock contact arm 11' is L-shaped, and an inclined surface 112' is provided below the contact surface 111' to facilitate the second end of the connecting rod 4 to slide into the curved portion 2111'. A groove 2113' is provided around the contacting periphery of the slide 211'. The purpose of the above arrangement is to allow the handle to rotate in the opposite direction, so that the directions of the N pole and the L pole can be swapped compared with the embodiment of the present application document to meet different needs.

Claims

1. A circuit breaker moving contact operating mechanism, comprising a handle, a lock, a lock push rod device, a moving contact seat and a moving contact, a connecting rod is arranged between the handle and the moving contact seat, a first end of the connecting rod is connected to the handle, and a second end of the connecting rod is connected to the moving contact seat, the lock and the moving contact are both arranged on the moving contact seat, and a torsion spring is used to realize a linkage arrangement between the moving contact and the moving contact seat, Features: The movable contact seat is integrally provided with a mounting column, the lock catch and the movable contact are movably sleeved on the mounting column, the upper end of the movable contact seat is provided with a sliding groove for the end of the circuit breaker connecting rod to slide, the sliding groove includes a curved portion and a straight portion, the upper end of the lock catch is provided with a resistance arm, and the resistance arm is provided with a resistance surface, the lock catch push rod device includes a push rod and a spring, the spring force is on the push rod, after the circuit breaker is disconnected, the front end of the push rod is resisted on the side surface of the lock catch, so that the resistance surface of the lock catch is close to the curved portion of the sliding groove so as to lock the second end of the connecting rod in the curved portion of the sliding groove, after the second end of the connecting rod is locked in the curved portion of the sliding groove, the handle can be pushed to close the circuit breaker; after the circuit breaker is closed, the tripper mechanism of the circuit breaker acts on the lock catch to rotate the lock catch, and the resistance surface loses the lock on the second end of the connecting rod, and at this time the second end of the connecting rod can slide into the straight portion of the sliding groove to realize the circuit breaker opening.

2. The circuit breaker moving contact operating mechanism according to claim 1, Features: The curved portion of the slide groove is bent downward at one end close to the handle, and a limiting surface and a pressing surface are arranged on the lower side of the curved portion. The limiting surface is the lowest point position of the second end of the connecting rod in the curved portion of the slide groove after the circuit breaker is opened. After the circuit breaker is opened, the first end of the connecting rod connected to the handle is higher than the second end of the connecting rod in the curved portion of the slide groove. During and after the circuit breaker is closed, the second end of the connecting rod abuts against the pressing surface. At this time, the angle between the thrust direction generated by the handle on the second end of the connecting rod and the thrust direction generated by the pressing surface on the second end of the connecting rod is less than 180 degrees. After the circuit breaker is closed, the top rod end of the lock push rod mechanism is separated from the lock side.

3. The circuit breaker moving contact operating mechanism according to claim 1 or 2, Features: An inclined surface is provided on the outer side of the contact surface of the contact arm for allowing the second end of the connecting rod to slide into the curved part of the slide groove. A push arm is provided above the lock buckle and below the contact arm. The contact arm and the push arm are forked to form a fork. The width of the fork is greater than the diameter of the second end of the connecting rod. When the circuit breaker is opened, the upper side of the push arm can push the second end of the connecting rod to cause the second end of the connecting rod to slide into the straight part of the slide groove.

4. The circuit breaker moving contact operating mechanism according to claim 2, Features: The resistance arm and the push arm are staggered, a positioning boss is arranged below the slide slot of the moving contact seat, part of the upper side surface of the positioning boss is integrated with the lower side surface of the curved portion of the slide slot to form a pressure surface, and the pressure surface cooperates with the resistance surface to lock the second end of the connecting rod of the circuit breaker so that the second end of the connecting rod of the circuit breaker is placed in the curved portion of the slide slot, and the push arm is placed on the outer side surface of the positioning boss.

5. The circuit breaker moving contact operating mechanism according to claim 1, Features: The bent portion of the chute is bent upward at one end close to the handle, and a pressing limiting surface is provided on the upper side of the bent portion. After the circuit breaker is closed, the second end of the connecting rod abuts against the pressing limiting surface. At this time, the included angle between the thrust direction generated by the handle on the second end of the connecting rod and the thrust direction generated by the pressing limiting surface on the second end of the connecting rod is less than 180 degrees.

6. The moving contact operating mechanism of the circuit breaker according to claim 5, characterized in that: The abutting surface on the abutting arm is L-shaped. A slope for facilitating the second end of the connecting rod to slide into the bent portion is provided below the abutting surface, and a groove is provided on the abutting periphery of the chute.

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