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Composite buffer

A technology of composite buffering and buffering pad, which is applied in high-voltage air circuit breakers, electrical components, electrical switches, etc., can solve the problem of not being able to completely suppress bouncing, and achieve the effect of reducing impact and restraining bouncing.

Inactive Publication Date: 2012-12-26
CHANGSHU GENERAL ELECTRIC APPLIANCE FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing opening buffer has only one-level buffer structure, which cannot completely suppress the rebound of the over-travel

Method used

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  • Composite buffer

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Embodiment Construction

[0016] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0017] see figure 1 , the embodiment of the present invention includes:

[0018] A composite buffer, comprising: a limit device 10, a cylinder 20, a cover 30 installed in the inner cavity of the cylinder 20, a lower cover 40, a piston 50, a piston rod 60, a spring 70, and a buffer pad 80 and cage 90.

[0019] The cover 30 and the lower cover 40 are respectively fixed on two ends of the cylinder body 20 . In this embodiment, the outer surface of the lower cover 40 is stepped, and is fixed by cooperating with the surface of the inner cavity of the cylinder body 20. At the same time, in order to ensure the sealing performance, the outer surface of...

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Abstract

The invention discloses a composite buffer. The composite buffer comprises a limiting device and a cylinder body, as well as a seal cover, a lower cover, a piston, a piston rod, a spring, a retainer and a cushion pad which are mounted in the inner chamber of the cylinder body, wherein the cushion pad is wrapped outside the piston rod and is in contact with the seal cover; the retainer is wrapped on the piston rod and used for fixing the cushion pad; the piston divides the inner chamber of the cylinder body into an upper oil chamber and a lower oil chamber; and a throttling port through which the upper oil chamber and the lower oil chamber are communicated is formed on the piston. The composite buffer can achieve twice buffering, effectively reduces the impact caused in closing and opening of a vacuum circuit breaker, and can effectively absorb the impact energy of the limiting device and prevent the limiting device from rebounding.

Description

technical field [0001] The invention relates to the field of electrical appliances, in particular to a composite buffer for a vacuum circuit breaker. Background technique [0002] In order to ensure the mechanical life of the bellows of the vacuum interrupter of the vacuum circuit breaker, it is required that the overtravel of its opening should be as small as possible, and the bounce of the limit device should also be small enough, because this bounce will cause a heavy blow in the gap Wear, the secondary reignition of the arc occurs, and the contact is burned, thus reducing its service life. Therefore, the general operating mechanism of the vacuum circuit breaker is equipped with an opening buffer to suppress the rebound of the over-travel. [0003] The existing opening buffer has only one level of buffer structure, which cannot completely suppress the rebound of the over-travel. Contents of the invention [0004] The technical problem mainly solved by the present inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H33/66
Inventor 王卫良孙劲文王晓红朱国庭王勇
Owner CHANGSHU GENERAL ELECTRIC APPLIANCE FACTORY
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