Switching-on device for spring operating mechanism of circuit breaker

Abstract

The utility model discloses a circuit breaker spring operating mechanism closing device, which relates to the technical field of circuit breakers, and comprises a mechanism frame, the mechanism frame is composed of a front clamping plate and a rear clamping plate, an energy storage shaft is arranged at the middle lower part between the front clamping plate and the rear clamping plate, an energy storage retaining pawl is arranged on the energy storage shaft, and a fixing hole is arranged on the energy storage retaining pawl to install a reset spring. The reset spring is fixed on the closing pawl hanging spring pin; the closing pawl hanging spring pin is arranged at the middle lower part of the front clamping plate; the energy storage holding pawl cam roller and the energy storage holding pawl are arranged, and the friction type clutch principle is utilized, so that the energy storage holding pawl and the closing half shaft are buckled more stably and reliably, and the tripping force is smaller; besides, matching of all parts of the spring operating mechanism is optimized and adjusted by the aid of existing space during closing, so that the spring operating mechanism is more reasonable and is more efficient and quicker in assembly, debugging and maintenance, and the fastening amount or the fastening angle reaches the optimal working state of the spring operating mechanism by means of perfect design.

Description

Technical Field

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

[0002] The circuit breaker spring operating mechanism refers to a switching device that can close, carry and disconnect the current under normal circuit conditions and can close, carry and disconnect the current under abnormal circuit conditions within a specified time.

[0003] The existing circuit breaker spring operating mechanism has various inconveniences in assembly, debugging and maintenance due to the imperfect control of the angle and size of the energy storage retaining latch design and the amount of buckling with the closing half-axis. Due to manual assembly, the buckling amount or the buckling angle is not easy to control, which increases the instability of the circuit breaker spring operating mechanism. If the buckling amount is too large, the closing tripping coil cannot reliably operate the circuit breaker spring operating mechanism within the specified voltage range. If the buckling amount is too small, it is easy to cause the circuit breaker spring operating mechanism to trip due to vibration during operation. Therefore, there are certain safety hazards in the later maintenance process, and it also has a certain impact on production efficiency. 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 closing device.

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

[0006] The circuit breaker spring operating mechanism closing device includes a mechanism frame, which is composed of a front clamping plate and a rear clamping plate. An energy storage shaft is installed in the middle and lower part between the front clamping plate and the rear clamping plate. An energy storage retaining latch is installed on the energy storage shaft. A fixing hole is provided on the energy storage retaining latch to install a reset spring. The reset spring is fixed to the closing latch spring pin, and the closing latch spring pin is installed in the middle and lower part of the front clamping plate.

[0007] A roller is provided on the upper right side of the energy storage retaining latch. The roller is fixed on the energy storage retaining cam through a pivot. The energy storage retaining cam is installed on the camshaft.

[0008] A closing half-axis is provided on the upper left side of the energy storage retaining latch.

[0009] Working principle: The utility model utilizes the friction clutch principle to increase the transmission torque, achieve smooth engagement, no noise, reliable and stable advantages. That is, the friction tripping method is adopted between the primary holding latch (roller) and the secondary holding latch (energy storage holding latch), that is, the arc surface of the energy storage holding latch contacts the circular surface of the roller, and the roller is made of low-friction metal material. When tripping, the energy storage holding latch rotates around the energy storage axis. Therefore, the retention is more reliable and the tripping force is smaller, which effectively solves the problem that the buckling amount or buckling angle is difficult to control and increases the instability of the action of the circuit breaker spring operating mechanism.

[0010] In the utility model, when buckling, the roller rotates clockwise along the cam shaft and slowly approaches the energy storage retaining latch. When the arc surface of the energy storage retaining latch contacts the circular surface of the roller, the energy storage retaining latch rotates around the energy storage shaft under the action of friction, so that the left end of the energy storage retaining latch is buckled with the closing half shaft.

[0011] When tripping, the roller rotates counterclockwise along the camshaft, and the roller slowly leaves the energy storage holding latch. The energy storage holding latch is reset under the action of the reset spring, causing the energy storage holding latch to leave the closing half shaft.

[0012] The beneficial effects of the utility model are as follows:

[0013] By setting an energy storage retaining latch cam roller and an energy storage retaining latch and utilizing the friction clutch principle, the engagement between the energy storage retaining latch and the closing half-shaft is made more stable and reliable, and the tripping force is smaller; in addition, the utility model simulates the closing action by designing the angle and size of the energy storage retaining latch and the engagement amount with the closing half-shaft without changing the overall size of the spring operating mechanism. After a run-in experiment on the new design, it is concluded that the utility model uses the existing space to optimize the coordination of its components during the closing action, making it more reasonable, and more efficient and quick in assembly, debugging, and maintenance. The engagement amount or engagement angle also achieves the best working state of the spring operating mechanism through the improvement of the design. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 yes Figure 1 Middle AA section view.

[0016] Figure numerals: 1. front splint; 2. rear splint; 3. energy storage shaft; 4. energy storage retaining latch; 5. reset spring; 6. closing latch hanging spring pin; 7. roller; 8. energy storage retaining cam; 9. camshaft; 10. closing half shaft. 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 2 As shown, this embodiment provides a circuit breaker spring operating mechanism closing device, including a mechanism frame, which is composed of a front clamping plate 1 and a rear clamping plate 2. An energy storage shaft 3 is installed in the middle and lower part between the front clamping plate 1 and the rear clamping plate 2. An energy storage retaining latch 4 is installed on the energy storage shaft 3. A fixing hole is provided on the energy storage retaining latch 4 to install a reset spring 5. The reset spring 5 is fixed to the closing latch spring pin 6. The closing latch spring pin 6 is installed in the middle and lower part of the front clamping plate 1.

[0021] A roller 7 is provided at the upper right side of the energy storage retaining latch 4 . The roller 7 is fixed on an energy storage retaining cam 8 through a pivot. The energy storage retaining cam 8 is installed on a camshaft 9 .

[0022] A closing half shaft 10 is provided on the upper left of the energy storage retaining latch 4 .

[0023] Working principle: The utility model utilizes the friction clutch principle to increase the transmission torque, achieve smooth meshing, no noise, reliable and stable advantages. That is, the first-stage holding latch (roller 7) and the second-stage holding latch (energy storage holding latch 4) adopt a friction tripping method, that is, the arc surface of the energy storage holding latch 4 contacts the circular surface of the roller 7, and the roller 7 is made of low-friction metal material. When tripping, the energy storage holding latch 4 rotates around the energy storage shaft 3. Therefore, the holding is more reliable and the tripping force is smaller, which effectively solves the problem that the buckling amount or buckling angle is difficult to control and increases the instability of the circuit breaker spring operating mechanism.

[0024] In the present invention, when buckling, refer to the attached Figure 2 , the roller 7 rotates clockwise along the cam shaft 9 and slowly approaches the energy storage retaining latch 4. When the arc surface of the energy storage retaining latch 4 contacts the circular surface of the roller 7, the energy storage retaining latch 4 rotates around the energy storage shaft 3 under the action of friction, so that the left end of the energy storage retaining latch 4 is buckled with the closing half shaft 10;

[0025] When tripping, the roller 7 rotates counterclockwise along the camshaft 9, and the roller 7 slowly leaves the energy storage retaining latch 4. The energy storage retaining latch 4 is reset under the action of the reset spring 5, so that the energy storage retaining latch 4 leaves the closing half shaft 10.

Claims

1. A circuit breaker spring operating mechanism closing device, comprising a mechanism frame, the mechanism frame consisting of a front clamping plate and a rear clamping plate, characterized in that: An energy storage shaft is installed in the middle and lower part between the front splint and the rear splint, and an energy storage retaining latch is installed on the energy storage shaft. There is a fixing hole on the energy storage retaining latch to install a reset spring, and the reset spring is fixed to the closing latch spring pin, and the closing latch spring pin is installed in the middle and lower part of the front splint.

2. The circuit breaker spring operating mechanism closing device according to claim 1, characterized in that: A roller is provided on the upper right side of the energy storage retaining latch. The roller is fixed on the energy storage retaining cam through a pivot. The energy storage retaining cam is installed on the camshaft.

3. The circuit breaker spring operating mechanism closing device according to claim 1, characterized in that: A closing half-axis is provided on the upper left side of the energy storage retaining latch.

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