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CN-224217448-U - Connecting structure for fixed contact of circuit breaker

CN224217448UCN 224217448 UCN224217448 UCN 224217448UCN-224217448-U

Abstract

The application relates to the technical field of electrical equipment, and discloses a connecting structure for a fixed contact of a circuit breaker, which is applied to the circuit breaker with the fixed contact and a circuit board, wherein an inserting port is arranged on the fixed contact, the connecting structure comprises a connecting bolt connected between the fixed contact and the circuit board, the connecting bolt is conductive, a conductive hole for the connecting bolt to penetrate is formed in the circuit board, and connecting threads matched with the connecting bolt threads are formed in the inner wall of the plug-in port. The circuit board and the fixed contact are connected through the connecting bolt, so that the circuit board and the fixed contact have the effects of improving the connection stability and guaranteeing the normal operation of the circuit breaker.

Inventors

  • ZHANG JUNHUI
  • WANG YONGXIAN

Assignees

  • 广州南鸿智能电气有限公司

Dates

Publication Date
20260508
Application Date
20250415

Claims (8)

  1. 1. The connecting structure for the fixed contact of the circuit breaker is applied to the circuit breaker with the fixed contact (1) and the circuit board (2), and the fixed contact (1) is provided with an inserting port (11), and is characterized by comprising a connecting bolt (3) connected between the fixed contact (1) and the circuit board (2), wherein the connecting bolt (3) is conductive, the circuit board (2) is provided with a conductive hole (21) for the connecting bolt (3) to penetrate through, and the inner wall of the inserting port (11) is provided with connecting threads (111) in threaded fit with the connecting bolt (3).
  2. 2. The connecting structure for the fixed contact of the circuit breaker according to claim 1, wherein the connecting bolt (3) comprises a screw rod and a bolt head, a gasket (4) is sleeved on the screw rod, the diameter of the gasket (4) is larger than that of the bolt head, and when the connecting bolt (3) is connected with the fixed contact (1), the gasket (4) is positioned between the circuit board (2) and the bolt head.
  3. 3. The connecting structure for the fixed contact of the circuit breaker according to claim 2, further comprising a conductive ring (5) connected between the fixed contact (1) and the circuit board (2), wherein the conductive ring (5) is arranged in the conductive hole (21) and the plug-in port (11) in a penetrating manner, the conductive ring (5) is a hollow cylinder, an installation thread (51) in threaded fit with the connecting bolt (3) is arranged on the inner wall of the conductive ring (5), an installation groove (13) is formed in the inner wall, far away from the circuit board (2), of the plug-in port (11), and a fixing thread (131) in threaded fit with the connecting bolt (3) is arranged on the groove wall of the installation groove (13).
  4. 4. The connecting structure for the fixed contact of the circuit breaker is characterized in that a yielding groove (14) is formed in the groove wall, far away from the plug-in port (11), of the mounting groove (13), the width of the yielding groove (14) is larger than that of the mounting groove (13) in the direction perpendicular to the direction that the connecting bolt (3) stretches into the mounting groove (13), a limiting component (6) is arranged at one end, far away from the bolt head, of a screw rod of the connecting bolt (3), of the connecting bolt, and the limiting component (6) is used for limiting the connecting bolt (3) in the mounting groove (13).
  5. 5. The connection structure for a fixed contact of a circuit breaker according to claim 4, wherein the limiting assembly (6) comprises two limiting blocks (61) arranged on a screw in a sliding manner and an elastic piece (62) arranged between the two limiting blocks (61), limiting grooves (63) are formed in the screw, the two limiting blocks (61) are arranged in the limiting grooves (63), limiting holes (612) are formed in opposite side walls of the two limiting blocks (61), connecting grooves (631) are formed in opposite groove walls of the limiting grooves (63), connecting rods (64) are arranged in the two connecting grooves (631) and the two limiting holes (612) in a common mode, the two limiting blocks (61) are arranged on the connecting rods (64) in a sliding manner, and the elastic piece (62) can drive the two limiting blocks (61) to move to one side far away from each other, and when the limiting blocks (61) stretch into the positioning grooves (14), the maximum distance between the two limiting blocks (61) is larger than the maximum distance between the two limiting blocks (13) and is larger than the maximum distance between the two limiting blocks (61) and the maximum distance between the two limiting blocks and the two limiting blocks (13) along the directions perpendicular to the mounting grooves (13) and the mounting grooves (13).
  6. 6. The connection structure for the fixed contact of the circuit breaker according to claim 5, wherein the elastic piece (62) comprises a reset spring (621) sleeved on the connecting rod (64), and two ends of the reset spring (621) are respectively abutted against the side walls of different limiting blocks (61).
  7. 7. The connecting structure for the fixed contact of the circuit breaker according to claim 6, wherein one end, far away from the screw rod, of the two limiting blocks (61) is provided with a guide inclined plane (613).
  8. 8. The connection structure for a stationary contact of a circuit breaker according to claim 7, wherein the two limiting blocks (61) are provided with fixing grooves (611) on one sides close to each other, one end of the return spring (621) is arranged in one of the fixing grooves (611), and the other end is arranged in the other fixing groove (611).

Description

Connecting structure for fixed contact of circuit breaker Technical Field The application relates to the technical field of electrical equipment, in particular to a connecting structure for a fixed contact of a circuit breaker. Background The circuit breaker comprises a fixed contact and a moving contact, when current overload is detected in the circuit, the moving contact can be separated from the fixed contact, so that the circuit is rapidly cut off, overload operation of equipment is prevented, and electrical equipment is protected from damage. In the related art, a circuit breaker is proposed in a patent with a bulletin number of CN220984449U, and comprises a mounting shell, a base and an upper cover detachably mounted on the top of the base, wherein the base and the upper cover enclose a first accommodating space, a bottom plate of the base is recessed towards the first accommodating space to form a mounting groove, a power taking hole is formed in the bottom plate, a static contact is positioned in the first accommodating space, a circuit board is positioned in the mounting groove and provided with a conductive hole, a conductive column is inserted into the conductive hole, a part of the conductive column enters the first accommodating space through the power taking hole and is contacted with the static contact, so that the circuit board is electrically connected with the static contact through the conductive column, an inserting port is formed in the static contact, and the conductive column is inserted into the inserting port to be contacted with the static contact through the inserting port. However, when the static contact of the circuit breaker is connected with the circuit board through the conductive column, the conductive column is easy to generate the infirm plugging condition, which causes poor contact between the static contact and the circuit board and affects the normal operation of the circuit breaker, so the circuit breaker needs to be improved. Disclosure of utility model In order to ensure the normal operation of a circuit breaker, the application provides a connecting structure for a fixed contact of the circuit breaker. The application provides a connecting structure for a fixed contact of a circuit breaker, which adopts the following technical scheme: A connection structure for circuit breaker stationary contact is applied to the circuit breaker that has stationary contact and circuit board, set up the interface on the stationary contact, including connecting the connecting bolt between stationary contact and circuit board, connecting bolt has electric conductivity, set up the conductive hole that is used for supplying connecting bolt to wear to establish on the circuit board, be equipped with on the interface inner wall with connecting bolt screw-thread fit's connecting thread. Through adopting above-mentioned technical scheme, when connecting circuit board and stationary contact, wear to establish connecting bolt in the conducting aperture earlier, then with connecting bolt and grafting mouth threaded connection, can realize the connection of circuit board and stationary contact, convenient operation, and connecting bolt and circuit board and stationary contact firm in connection. Compared with the circuit board and the fixed contact which are connected through the conductive column in a plug-in manner, the connection strength of the circuit board and the fixed contact is enhanced through the bolt connection, so that the possibility of poor contact between the circuit board and the fixed contact is reduced, the normal work of the circuit breaker is guaranteed, and the circuit breaker is convenient to install. Optionally, the connecting bolt includes screw rod and bolt head, the cover is equipped with the gasket on the screw rod, the diameter of gasket is greater than the diameter of bolt head, when connecting bolt connects in the stationary contact, the gasket is located between circuit board and the bolt head. Through adopting above-mentioned technical scheme, when connecting bolt connects in the static contact, the gasket butt has increased the area of contact with between the circuit board between bolt head and the circuit board to increased the frictional force of circuit board and bolt head, made the connection stability between connecting bolt and the circuit board high, can reduce the possibility that connecting bolt is not hard up at the in-process of vibration. In addition, the gasket can also disperse the pressure of the bolt head of the connecting bolt to the circuit board, and plays a role in protecting the circuit board. Optionally, still including connecting the conducting ring between static contact and circuit board, the conducting ring wears to establish in conducting hole and grafting mouth, the conducting ring is hollow cylinder, be equipped with on the inner wall of conducting ring with connecting bolt screw-thread fit's mounting thread, the mounting groove ha