Compression-type closing spring used for spring operation mechanism
A technology of closing spring and operating mechanism, which is applied to high-voltage air circuit breakers, high-voltage/high-current switches, electrical components, etc., can solve problems such as fractures at stress concentration points, achieve force balance, structural stability, and avoid stress concentration points Fracture effect
Active Publication Date: 2012-06-27
CHINA TIANSHUI CHANGCHENG SWITCHGEAR CO LTD
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Problems solved by technology
[0003] The purpose of the present invention is to provide a compressed closing spring for a spring operating mechanism to solve the problem that the existing closing spring is a structure of a tension spring hanging on a spring plate, which causes fracture at the place where the stress is concentrated
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[0019] The following embodiments can further illustrate the present invention, but do not limit the present invention in any way.
[0020] A compressed closing spring for a spring operating mechanism, including a closing spring 5, the closing spring 5 is installed between the end cover 4 and the compression end cover 6, two guide plates 7 are arranged in the middle of the closing spring 5, and the compression end The round hole 13 of the cover 6 is provided with a copper sleeve 8, and the upper end of the guide plate 7 is provided with a large long hole 12.
[0021] The compression end cap 6 is provided with a hole 14, and the two guide plates 7 are respectively provided with two elongated holes 11, and the limit pins 9 are respectively inserted in the elongated holes 11 and the holes 14.
[0022] The two guide plates 7 are fixed by positioning pins 10 .
[0023] The bottom of guide plate 7 is provided with bottom hole 15, and pin shaft 3 is arranged in bottom hole 15, and pi...
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The invention discloses a compression-type closing spring used for a spring operation mechanism. The compression-type closing spring can be used for solving the problem that the stress concentration part fractures caused by that the existing closing spring is in a tension spring suspended spring plate structure. The compression-type closing spring comprises a closing spring which is arranged between an end cover and a compression end cover; two guide plates are arranged in the middle of the closing spring; a copper bush is arranged in a round hole of the compression end cover; and a big slot hole is formed at the upper end of the guide plate. The compression-type closing spring used for the spring operation mechanism provided by the invention has the following characteristics: 1. the problem of stress concentration at the two ends of the tension spring structure is solved; 2. the total length after the spring is subpackaged is reduced, and the installation size is reduced; and 3. the compression-type closing spring is suitable for a large-load circuit breaker. By adopting a compression spring, the structure of the compression-type closing spring provided by the invention is more stable; the stress at the two ends of the structure is balanced; and the problems that the stress concentration part fractures caused by the tension spring suspended spring plate structure, and the circuit breaker is in fault can be avoided.
Description
technical field [0001] The invention belongs to the field of high-voltage AC vacuum circuit breakers, in particular to a compressed closing spring for a spring operating mechanism. Background technique [0002] In the field of medium-voltage vacuum circuit breakers, the spring operating mechanism is still the mainstream operating mechanism type at present, and most of the main component closing springs are designed as tension spring structures. In actual application, especially in circuit breakers with a rated short-circuit breaking current of 40kA and above, since the two ends of the spring are usually connected by a hanging spring plate, the defects in the spring steel wire itself or the manufacturing process may cause the spring to hang The stress concentration of the spring plate structure breaks, causing the circuit breaker to fail, and there is a big hidden danger. In addition, because the two ends of the tension spring structure need to hang spring plates, the inst...
Claims
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IPC IPC(8): H01H33/666
Inventor 张炜柳连有裴冠辉刘爱华
Owner CHINA TIANSHUI CHANGCHENG SWITCHGEAR CO LTD