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Actuator for switch comprising a freewheel coupling device

A transmission device and coupling device technology, which is applied to clutches, one-way clutches, power devices inside switches, etc., can solve problems such as high cost and complicated control of friction parameters, and achieve the effect of reducing wear

Inactive Publication Date: 2013-03-20
ALSTOM TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Those currently existing circuit breaker drives with freewheel couplings are not completely satisfactory: they may therefore be designed with a large number of components, their costs are high and / or the control of the friction parameters during operation is complicated

Method used

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  • Actuator for switch comprising a freewheel coupling device
  • Actuator for switch comprising a freewheel coupling device
  • Actuator for switch comprising a freewheel coupling device

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0051] figure 1 The transmission device 1 according to the invention for a high-voltage disconnector is shown in a perspective view.

[0052] The transmission has a main body 1 indicated by dashed lines, in which is mounted a motor 2, a gear train 3 and a breaking spring 4 for breaking the movable contacts of the circuit breaker.

[0053] More precisely, the motor 2 is mounted in mesh with the gear train 3 in order to prestress (wind up) the trip spring 4 when the motor is powered.

[0054] In other embodiments, the motor may be replaced by a manually operated handle to manually wind the spring.

[0055] The transmission 1 also comprises a freewheel coupling 5 which is part of the drive chain of the gear train 3 . The function of said device 5 is to prevent said motor 2 and the upstream part of said gear train 3 from displacing the movable contact of said circuit breaker when releasing said previously wound (pre-stressed) said breaking spring 4 . 31 spins.

[0056] In the...

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PUM

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Abstract

Actuator (1) for a switch, such as a high-voltage or medium-voltage circuit breaker, comprising a freewheel coupling device (5) to allow a motor (2) to be uncoupled when the switch contact is closed by the closing spring (4) provided for that purpose. The device (5) comprises a helical spring (52) with contiguous coils (520) wound with contact around two cylinders one of them integral with a cogged wheel (303) in mesh with the motor (2) and the other integral with a shaft (300) in mesh with another cogged wheel (301) integral with the closing spring (4).

Description

technical field [0001] The invention relates to a transmission of a circuit breaker with a freewheel coupling. [0002] It is especially suitable for high and medium voltage circuit breakers. Background technique [0003] Freewheel couplings are known from the prior art. [0004] For example, document DE19516973 teaches a freewheel coupling comprising a helical spring 25 with turns 25a, 25b extending around a cylindrical portion (see for example image 3 and column 3, lines 44 to 49). An axially extending space 26 is defined between these parts, which makes it possible to obtain an additional spring action. This device does not provide a very small return angle for the free wheel. [0005] High-voltage disconnector drives including freewheel couplings are also known from the prior art. [0006] High or medium voltage disconnect switch drives usually have a motor by means of which a disconnect spring can be pre-stressed or wound via a gear train, releasing (unwinding) thi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H3/30H01H3/54F16D41/20
CPCH01H3/3021F16D41/206H01H3/54
Inventor 苏特拉恩斯特
Owner ALSTOM TECH LTD