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A three-position switch with closing self-locking

A technology of three-position switch and closing position, which is applied in the direction of electric switches, air switch components, 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: 2017-03-29
CHINA XD ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 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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  • A three-position switch with closing self-locking
  • A three-position switch with closing self-locking

Examples

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Embodiment Construction

[0024] The present invention is described in further detail below in conjunction with accompanying drawing:

[0025] Such as figure 1 and figure 2 As shown, the three-position switch with closing self-locking of the present invention includes three fixed static contacts, which are respectively the first, second and third static contacts 1, 2, 5, a moving contact 10, and A set of linkage mechanism for driving the movement of the moving contact 10; 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 second 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 pass through the axis O 2 Fixed connection, when the moving contact 10 switches between the first closing position and the second closing position, the moving contact rotate...

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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

[0001] 【Technical field】 [0002] The invention relates to the technical field of medium-voltage and high-voltage switches, in particular to a three-position switch with closing self-locking which is suitable for large rated current and large short-circuit current. [0003] 【Background technique】 [0004] Three-position switch, especially a three-position switch that flows through a larger rated current and a larger short-circuit current. It needs to withstand a lot of electromotive force under the action of high current. The movable contact may be bounced off under the action of large electric force, and an electric arc may be generated between the fixed contact and the movable contact, causing serious accidents. Therefore, the moving contact must be reliably locked when it is in the closing position. [0005] Due to the particularity of two closing positions of the three-position switch, the functions of the locking device and the transmission device have to be transformed ...

Claims

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Application Information

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