Spring operating mechanism of circuit breaker

Abstract

The utility model discloses a circuit breaker spring operating mechanism, which relates to the technical field of circuit breakers and comprises a mounting seat and a direct current motor fixed on the mounting seat, an energy storage spring assembling component is arranged on the right of the direct current motor, and a closing trip coil and an opening trip coil are mounted on the lower end face of the mounting seat. The closing trip coil and the opening trip coil are arranged in a one-to-one staggered mode, an opening trigger rod is arranged on the left side of the opening trip coil, and an opening half shaft is installed at the inner side end of the opening trigger rod; the switching-on tripping coil and the switching-off tripping coil are arranged in a one-to-one staggered mode, the structural layout is compact, scientific and reasonable, mutual interference between the switching-off half shaft and the switching-on tripping coil during action is avoided by adjusting the installation position of the switching-on tripping coil, potential safety hazards are eliminated, and the personal safety of operators is guaranteed; and an overcurrent coil and an overcurrent trigger plate are arranged for standby application, so that the purpose of opening is achieved, and potential safety hazards are eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, and more specifically to a spring operating mechanism of a circuit breaker. Background Art

[0002] The circuit breaker spring operating mechanism refers to a switch device that can close, carry and disconnect the current under normal circuit conditions and close, carry and disconnect the current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. Among them, the opening trip coil and the opening half-shaft are responsible for performing the opening operation in the spring operating mechanism of the circuit breaker. The traditional circuit breaker spring operating mechanism has defects in its structural design. When the closing trip coil is activated, it affects the rotation of the opening half-shaft and cannot effectively complete the opening action.

[0003] For example, a Chinese patent (CN 220020979 U) discloses a spring operating mechanism for a vacuum circuit breaker. The circuit breaker spring operating mechanism in the patent has defects in its structural design. Specifically, a closing tripping coil (14) is installed on the upper end surface of the bearing seat (1). It can be observed from the attached drawings that the closing tripping coil is located above one end of the opening half-shaft. Since the closing tripping coil occupies more space and is close to the opening half-shaft, it not only affects the installation of the opening half-shaft, but also affects the rotation of the opening half-shaft. Therefore, it is necessary to optimize the structure. Utility Model Content

[0004] The purpose of the utility model is to solve the above technical problems and provide a circuit breaker spring operating mechanism.

[0005] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0006] A circuit breaker spring operating mechanism comprises a mounting base and a DC motor fixed on the mounting base, an energy storage spring assembly component is arranged on the right side of the DC motor, a closing tripping coil and an opening tripping coil are installed on the lower end surface of the mounting base, the closing tripping coil and the opening tripping coil are staggered one below and one above, an opening trigger rod is arranged on the left side of the opening tripping coil, and an opening half shaft is installed on the inner end of the opening trigger rod.

[0007] A closing trigger rod is arranged on the right side of the closing tripping coil.

[0008] A closing half-shaft is installed at the inner end of the closing trigger rod.

[0009] A closing trigger plate is installed on the closing half shaft, and the closing trigger plate is arranged vertically with the closing trigger rod. When the power is off, the closing trip coil cannot complete the closing action, and the closing trigger plate is arranged to cooperate with the manual closing operating mechanism outside the chassis to complete the closing.

[0010] An overcurrent trigger plate is provided at one end of the opening half shaft close to the energy storage spring assembly component, and an overcurrent coil is provided on the right side of the overcurrent trigger plate. When the opening tripping coil or the opening trigger rod fails and the opening action cannot be completed, the overcurrent coil and the overcurrent trigger plate are provided to replace the opening tripping coil for backup, so as to achieve the purpose of opening and eliminate safety hazards. When in use, the overcurrent coil works and contacts the overcurrent trigger plate to complete the opening.

[0011] The beneficial effects of the utility model are as follows:

[0012] The closing tripping coil and the opening tripping coil are staggered one above the other, and the structural layout is compact, scientific and reasonable. By adjusting the installation position of the closing tripping coil, the interference between the closing tripping coil and the opening half-axis during operation can be avoided, thereby eliminating safety hazards and ensuring the personal safety of operators. By setting up overcurrent coils and overcurrent trigger boards as backup, the purpose of opening can be achieved and safety hazards can be eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a bottom view of the utility model;

[0015] Figure 3 It is a schematic diagram of the installation structure of the overcurrent trigger board and the overcurrent coil.

[0016] Figure numerals: 1. mounting base; 2. DC motor; 3. energy storage spring assembly; 4. closing trip coil; 5. opening trip coil; 6. opening trigger rod; 7. opening half shaft; 8. closing trigger rod; 9. closing half shaft; 10. closing trigger plate; 11. overcurrent trigger plate; 12. overcurrent coil. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example 1

[0020] like Figures 1 to 3 As shown, this embodiment provides a circuit breaker spring operating mechanism, including a mounting base 1 and a DC motor 2 fixed on the mounting base 1, a storage spring assembly component 3 is provided on the right side of the DC motor 2, a closing tripping coil 4 and an opening tripping coil 5 are installed on the lower end surface of the mounting base 1, the closing tripping coil 4 and the opening tripping coil 5 are staggered one below and one above, an opening trigger rod 6 is provided on the left side of the opening tripping coil 5, and an opening half shaft 7 is installed on the inner end of the opening trigger rod 6.

[0021] A closing trigger rod 8 is provided on the right side of the closing tripping coil 4 .

[0022] A closing half shaft 9 is installed at the inner end of the closing trigger rod 8 .

[0023] A closing trigger plate 10 is mounted on the closing half shaft 9, and the closing trigger plate 10 is arranged vertically with the closing trigger rod 8. When the power is off, the closing trip coil 4 cannot complete the closing action, and the closing trigger plate 10 is arranged to cooperate with the manual closing operating mechanism outside the chassis to complete the closing.

[0024] An overcurrent trigger plate 11 is provided at one end of the opening half shaft 7 close to the energy storage spring assembly 3, and an overcurrent coil 12 is provided on the right side of the overcurrent trigger plate 11. When the opening tripping coil 5 or the opening triggering rod 6 fails and the opening action cannot be completed, the overcurrent coil 12 and the overcurrent trigger plate 11 are provided to replace the opening tripping coil for backup, so as to achieve the purpose of opening and eliminate safety hazards. When in use, the overcurrent coil 12 works and contacts the overcurrent trigger plate 11 to complete the opening.

Claims

1. A circuit breaker spring operating mechanism, comprising a mounting base and a DC motor fixed on the mounting base, characterized in that: An energy storage spring assembly is provided on the right side of the DC motor, and a closing tripping coil and an opening tripping coil are installed on the lower end face of the mounting seat. The closing tripping coil and the opening tripping coil are staggered one below and one above. An opening trigger rod is provided on the left side of the opening tripping coil, and an opening half-shaft is installed on the inner end of the opening trigger rod.

2. The circuit breaker spring operating mechanism according to claim 1, characterized in that: A closing trigger rod is arranged on the right side of the closing tripping coil.

3. The circuit breaker spring operating mechanism according to claim 2, characterized in that: A closing half-shaft is installed at the inner end of the closing trigger rod.

4. The circuit breaker spring operating mechanism according to claim 3, characterized in that: A closing trigger plate is installed on the closing half-axis, and the closing trigger plate is arranged vertically with the closing trigger rod.

5. The circuit breaker spring operating mechanism according to claim 1, characterized in that: An overcurrent trigger plate is arranged at one end of the opening half shaft close to the energy storage spring assembly component, and an overcurrent coil is arranged on the right side of the overcurrent trigger plate.

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