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Three-position switch with switching on and self-locking functions

A three-position switch and closing position technology, applied in electrical switches, air switch parts, electrical components, etc., can solve problems such as design difficulties, and achieve the effect of increasing load torque and reducing operating work.

Active Publication Date: 2015-03-25
CHINA XD ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The three-position switch has two closing positions, and the functions of the locking device and the transmission device have to be transformed into each other, which brings great difficulties to the design.

Method used

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  • Three-position switch with switching on and self-locking functions
  • Three-position switch with switching on and self-locking functions

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings:

[0020] Such as figure 1 with figure 2 As shown, the three-position switch with closing and self-locking of the present invention includes three fixed static contacts, namely the first, second and third static contacts 1, 2, and 5, a movable contact 10, and A set of linkage mechanism that drives the moving contact 10 to move; the moving contact 10 is always in good contact with the third static contact 5, and when the moving contact 10 is in good contact with the first static contact 1, it is the first A closing position, when the moving contact 10 is in good contact with the second static contact 2, it is the second closing position; the moving contact and the third static contact are fixedly connected by the shaft O2, when the moving contact 10 When switching between the first closing position and the second closing position, the movable contact rotates aroun...

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Abstract

The invention provides a three-position switch with switching on and self-locking functions. The switch comprises three fixed contacts (1, 2 and 5) and a movable contact (10). The movable contact (10) and the fixed contacts (1, 2 and 5) are always in good contact. Moreover, the movable contact (10) can rotate around a shaft (O2) between the fixed contact (1) and the fixed contact (2). The movable contact (10) is driven by a link mechanism (3, 4, 6, 7, 8, 9 and 11). A power shaft (O3) is arranged for providing driving force. The fixed contact (5) is connected with the fixed contact (1) and the fixed contact (2) through the movable contact (10). When the three-position switch is switched on, a crank arm of the link mechanism is located on the same straight line with connection plates (3 and 4) or connection plates (6 and 7), and the crank arm is in a dead point state; when the movable contact (10) is an active piece, the crank arm and the connection plates (3 and 4) or connection plates (6 and 7) can not move.

Description

【Technical Field】 [0001] The invention relates to the technical field of medium voltage and high voltage switches, in particular to a three-position switch with closing and self-locking suitable for large rated current and large short-circuit current. 【Background technique】 [0002] A three-position switch, especially a three-position switch with a larger rated current and a larger short-circuit current. It needs to withstand a lot of electric power under the action of large current. The movable contact may be bounced under the action of large electric power, and an electric arc is generated between the fixed contact and the movable contact, causing serious accidents. Therefore, the moving contact must be reliably locked when in the closing position. [0003] Because of the particularity of the three-position switch with two closing positions, the functions of the locking device and the transmission device must be mutually transformed, which brings great difficulties to the desig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H9/24
CPCH01H9/24H01H31/08
Inventor 严旭
Owner CHINA XD ELECTRIC CO LTD
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