Circuit breaker operating mechanism

Abstract

A circuit breaker operating mechanism comprises a support assembly and a hasp assembly, the hasp assembly comprises a jump buckle, a lock catch and a re-buckle, the lock catch and the re-buckle are respectively configured to be rotatably connected with the support assembly, the re-buckle is provided with a lap joint face used for being matched with the lock catch, and the hasp assembly has a lap joint state and an unlocking state. The side plate is provided with a locking hole below the rotating shaft of the re-buckle, the locking hole is located at the front side of the moving path of the re-buckle switching from the lap joint state to the unlocking state, and the locking hole is used for inserting a locking pin shaft, limiting the re-buckle action and maintaining the lap joint state of the hasp assembly when the circuit breaker is verified. By reserving the locking hole in the support assembly, the pin shaft can be inserted into the locking hole to limit the re-buckle during instantaneous verification, so that the movable and static contacts cannot be disconnected during instantaneous verification, the movable and static silver points are prevented from being ablated, the reliability of the product is effectively ensured, and the device is simple in structure and convenient to operate.

Description

Technical Field

[0001] The utility model specifically relates to a circuit breaker operating mechanism. Background Art

[0002] Existing circuit breakers need to undergo various tests during routine factory tests, such as instantaneous verification, which requires 12 times the current to pass through and enable the trip unit to directly trip the operating mechanism and disconnect the moving and static contacts. Due to the large test current, an arc will be generated when the moving and static contacts are disconnected, and the arc will cause wear on the contacts. The arc root has a high temperature, which will cause partial melting of the contact surface. Due to the erosion of the arc, the contact surface becomes rough, forming a metamorphic layer, increasing the contact resistance, and causing the product to heat up. The product causes the contact surface to be eroded by the arc during the test, and a large number of tests are often required in the actual production process and factory tests, which will cause more serious wear on the contacts and seriously affect the product's performance. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a circuit breaker operating mechanism.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A circuit breaker operating mechanism, comprising:

[0006] A bracket assembly, used to be fixed to an external device base, and provided with two symmetrically arranged side panels;

[0007] A buckle assembly, comprising a jump buckle and a lock buckle and a re-buckle respectively configured to be rotatably connected to the bracket assembly, and the re-buckle is provided with an overlap surface for cooperating with the lock buckle;

[0008] The buckle assembly has an overlapped state and an unlocked state, wherein in the overlapped state, the jump buckle, the lock buckle and the re-buckle are overlapped with each other;

[0009] The side plate is provided with a locking hole below the rotating shaft of the re-latch, and the locking hole is located on the front side of the moving path of the re-latch switching from the overlapping state to the unlocking state. The locking hole is used to insert a locking pin when the circuit breaker is checked to limit the re-latch action and maintain the overlapping state of the buckle assembly.

[0010] Furthermore, the locking hole and the circular hole for fixing the re-locking shaft are located on the same axis.

[0011] Furthermore, the diameter of the locking hole is smaller than the diameter of the circular hole.

[0012] Furthermore, the re-deduction includes:

[0013] A first pivot portion, which is rotatably disposed between the two side plates and has a lap joint surface on its lower side for cooperating with the lock buckle;

[0014] A first linkage part, arranged at one end of the rotating part;

[0015] The second linkage part is arranged at the other end of the rotating part, and has a striking part, which forms a linkage with the tripping assembly. When in the unlocked state, the striking part is hit by the tripping rod and drives the re-buckle to release the overlapping state with the lock buckle.

[0016] Furthermore, the side plate is provided with a notch below the locking hole that can meet the moving path requirements of the first linkage part / the second linkage part.

[0017] Furthermore, a stopper is provided at the front end of the notch.

[0018] Furthermore, the lock comprises:

[0019] a second pivot portion rotatably disposed between the two side plates;

[0020] The first overlapping portion extends from two ends of the second pivot portion in the direction of the re-snap, and forms an overlapping plane at a position that matches the re-snap, and in the overlapping state, the overlapping plane and the overlapping surface of the re-snap form an overlapping match;

[0021] The second overlapping portion extends upward from the middle position of the second pivot portion and is arranged toward the jump buckle. In the overlapping state, the second overlapping portion is overlapped with the jump buckle.

[0022] Furthermore, the two side panels are fixedly connected via a plurality of assembly shafts, and an installation space for placing the buckle assembly is formed between the two side panels.

[0023] The beneficial effects of the utility model are as follows: by reserving a locking hole on the bracket assembly, a pin shaft can be inserted into the locking hole during instantaneous calibration, which serves as a limit for re-fastening, thereby ensuring that the moving and static contacts will not be disconnected during instantaneous calibration, thereby avoiding the dynamic and static silver points from being ablated, effectively ensuring the reliability of the product, and the structure is simple and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The utility model is a schematic diagram of the structure of a circuit breaker.

[0025] Figure 2 It is a structural schematic diagram of the utility model.

[0026] Figure 3 It is a side schematic diagram of the utility model.

[0027] Figure 4 It is a structural schematic diagram of the side plate of the utility model.

[0028] Figure 5 It is a schematic diagram of the structure when the buckle assembly is in an overlapping state.

[0029] Figure 6 It is a schematic diagram of the structure of the buckle.

[0030] Figure 7 A schematic diagram of the structure of the lock. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] As shown in the figure, a circuit breaker operating mechanism includes:

[0034] The bracket assembly 3 is used to be fixed to the peripheral base 1, and is provided with two symmetrically arranged side panels 31;

[0035] The buckle assembly 4 includes a jump buckle 43 and a lock buckle 42 and a re-buckle 41 respectively configured to be rotatably connected to the bracket assembly, and the re-buckle is provided with an overlap surface for cooperating with the lock buckle;

[0036] The buckle assembly has an overlapping state and an unlocking state, wherein in the overlapping state, the jump buckle, the lock buckle and the re-buckle are overlapped with each other, and in the unlocking state, the jump buckle and the lock buckle are separated.

[0037] The side plate is provided with a locking hole 312 below the rotating shaft of the re-lock, and the locking hole is located on the front side of the moving path of the re-lock from the overlapping state to the unlocking state. The locking hole is used to insert the locking pin shaft 5 during circuit breaker inspection to limit the re-lock action and maintain the overlapping state of the buckle assembly.

[0038] A locking hole is directly reserved on the side panel to limit the re-locking action during verification. Because the re-lock will rotate instantaneously with the rotating shaft as the center when entering the unlocked state, it is only necessary to set a pin at the front end of its rotation path to limit the re-locking action, and the pin needs to be removable. Based on this, a locking hole is directly set to facilitate the insertion of the pin, and the pin can limit the re-locking action and maintain the overlapping state, so that the moving and static contacts always remain in a closed state.

[0039] Furthermore, the locking hole and the circular hole for fixing the re-snap shaft are located on the same axis, and the setting position of the re-snap has an angle with the axis, so it is directly set at the position closest to the re-snap in the overlapping state, which can ensure that the inserted pin shaft contacts the re-snap, so that the re-snap will not move, avoiding the phenomenon that the overlapping state between the lock buckle and the re-snap may be released due to the small stroke of the re-snap.

[0040] Furthermore, the diameter of the locking hole 312 is smaller than the diameter of the circular hole 311. The use of a small diameter locking hole can effectively maintain the placement of the pin shaft, and can also be adapted to various conventional axial structures. It is not limited to a specific pin shaft, and any columnar structure with a certain rigidity can achieve the limit of the re-fastening.

[0041] Furthermore, the re-deduction 41 includes:

[0042] The first pivot part 411 is rotatably arranged between the two side plates, and a lap joint surface 4111 for cooperating with the lock buckle is arranged on its lower side. The first pivot part has a through hole, and the rotating shaft passes through the through hole. Both ends of the rotating shaft are respectively fixed to the side plates, playing the role of supporting the lock buckle and allowing the lock buckle to rotate relative to the side plates;

[0043] A first linkage part 412, provided at one end of the rotating part, for linkage with other parts of the circuit breaker;

[0044] The second linkage part 413 is arranged at the other end of the rotating part, and has a striking part 414, which forms a linkage with the trip assembly 2. When in the unlocked state, the striking part is hit by the tripping rod and drives the re-lock to release the overlapping state with the lock buckle.

[0045] Furthermore, the side plate is provided with a notch 313 below the locking hole to meet the moving path requirements of the first linkage part / the second linkage part. By providing the notch 313 on the side plate, the buckle can rotate relatively.

[0046] Furthermore, a stopper 314 is provided at the front end of the notch to limit the maximum distance of counterclockwise rotation of the buckle.

[0047] Furthermore, the lock comprises:

[0048] A second pivot portion 421, which is rotatably disposed between the two side plates;

[0049] The first overlapping portion 422 extends from both ends of the second pivot portion toward the re-fastening direction, and forms an overlapping plane 4222 at a position that cooperates with the re-fastening, that is, it is U-shaped. In the overlapping state, the overlapping plane and the overlapping surface of the re-fastening form an overlapping fit;

[0050] The second overlapping portion 423 extends upward from the middle position of the second pivot portion and is arranged toward the jump buckle. In the overlapping state, the second overlapping portion is overlapped with the jump buckle and is placed between the U-shaped first overlapping portions.

[0051] Furthermore, the two side panels are fixedly connected by a plurality of assembly shafts, and an installation space for placing the buckle assembly is formed between the two side panels. The assembly shafts are used to achieve fixed support of the side panels, making the bracket assembly more secure.

[0052] The embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A circuit breaker operating mechanism, comprising: A bracket assembly, used to be fixed to an external device base, and provided with two symmetrically arranged side panels; A buckle assembly, comprising a jump buckle and a lock buckle and a re-buckle respectively configured to be rotatably connected to the bracket assembly, and the re-buckle is provided with an overlap surface for cooperating with the lock buckle; The buckle assembly has an overlapped state and an unlocked state, wherein in the overlapped state, the jump buckle, the lock buckle and the re-buckle are overlapped with each other; It is characterized in that: the side plate is provided with a locking hole below the rotating shaft of the re-lock, and the locking hole is located at the front side of the moving path of the re-lock switching from the overlapping state to the unlocking state. The locking hole is used to insert a locking pin when the circuit breaker is checked to limit the re-lock action and maintain the overlapping state of the buckle assembly.

2. A circuit breaker operating mechanism according to claim 1, characterized in that: The locking hole and the circular hole for fixing the re-locking shaft are located on the same axis.

3. A circuit breaker operating mechanism according to claim 1 or 2, characterized in that: The diameter of the locking hole is smaller than the diameter of the circular hole.

4. A circuit breaker operating mechanism according to claim 1, characterized in that: The re-deduction includes: A first pivot portion, which is rotatably disposed between the two side plates and has a lap joint surface on its lower side for cooperating with the lock buckle; A first linkage part, arranged at one end of the rotating part; The second linkage part is arranged at the other end of the rotating part, and has a striking part, which forms a linkage with the tripping assembly. When in the unlocked state, the striking part is hit by the tripping rod and drives the re-buckle to release the overlapping state with the lock buckle.

5. A circuit breaker operating mechanism according to claim 4, characterized in that: The side plate is provided with a notch below the locking hole to meet the moving path requirements of the first linkage part / the second linkage part.

6. A circuit breaker operating mechanism according to claim 5, characterized in that: A stopper is provided at the front end of the notch.

7. A circuit breaker operating mechanism according to claim 1, characterized in that: The lock comprises: a second pivot portion rotatably disposed between the two side plates; The first overlapping portion extends from two ends of the second pivot portion in the direction of the re-snap, and forms an overlapping plane at a position that matches the re-snap, and in the overlapping state, the overlapping plane and the overlapping surface of the re-snap form an overlapping match; The second overlapping portion extends upward from the middle position of the second pivot portion and is arranged toward the jump buckle. In the overlapping state, the second overlapping portion is overlapped with the jump buckle.

8. A circuit breaker operating mechanism according to claim 1, characterized in that: The two side panels are fixedly connected via a plurality of assembly shafts, and an installation space for placing the buckle assembly is formed between the two side panels.

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