Spring operation device of circuit breaker

Patent metadata

Field	Value
Publication number	US-10026567-B2
Application number	US-201615245871-A
Country	US
Kind code	B2
Filing date	Aug 24, 2016
Priority date	Jan 14, 2016
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

A spring operation device includes a closing shaft rotating to apply closing driving force to a movable contactor of a circuit breaker; a breaking shaft connected to the closing shaft in an axial direction and rotating to apply breaking driving force to the movable contactor of a circuit breaker; a plurality of springs having one ends connected to the closing shaft and the breaking shaft and the other ends fixed in position and provided along circumferences of the closing shaft and the breaking shaft in order to transmit elastic restoring force to the closing shaft and the breaking shaft to rotate the closing shaft and the breaking shaft; and a power transmission unit connecting the closing shaft and the breaking shaft when a closing operation is performed and releasing a connection between the closing shaft and the breaking shaft when a breaking operation is performed.

First claim

What is claimed is:

1. A spring operation device comprising:
a closing shaft rotating to apply closing driving force to a movable contactor of a circuit breaker; a breaking shaft connected to the closing shaft in an axial direction and rotating to apply breaking driving force to the movable contactor of the circuit breaker;
a plurality of springs having one ends connected to the closing shaft and the breaking shaft and the other ends fixed in position and provided along circumferences of the closing shaft and the breaking shaft in order to transmit elastic restoring force to the closing shaft and the breaking shaft to rotate the closing shaft and the breaking shaft; and
a power transmission unit provided in a location in which the closing shaft and the breaking shaft are connected, connecting the closing shaft and the breaking shaft when a closing operation is performed, and releasing a connection between the closing shaft and the breaking shaft when a breaking operation is performed,
wherein the plurality of springs are provided to have a rotationally symmetrical structure with respect to rotational axes of the closing shaft and the breaking shaft and cooperate with each other to rotate the closing shaft and the breaking shaft in a single direction, and
wherein the closing shaft and the breaking shaft are coaxial and independently rotatable, and the plurality of springs include a plurality of closing springs connected to the closing shaft and a plurality of breaking springs connected to the breaking shaft.

2. The spring operation device of claim 1 , wherein the plurality of springs are provided in three directions along the circumferences of the closing shaft and the breaking shaft, centered on the closing shaft and the breaking shaft, to form a delta structure.

3. The spring operation device of claim 2 , wherein the plurality of springs are disposed in such a manner that lines extending therefrom form an equilateral triangular delta structure centered on the closing shaft and the breaking shaft.

4. The spring operation device of claim 2 , wherein each of the plurality springs provided along the circumferences of the closing shaft and the breaking shaft is configured as one of a pair of springs.

5. The spring operation device of claim 1 , wherein each of the plurality of springs is a tension spring.

6. The spring operation device of claim 1 , wherein each of the plurality of springs is a cold wound coil spring.

7. The spring operation device of claim 1 , wherein when the closing spring is charged, the power transmission unit releases a connection between the closing shaft and the breaking shaft.

8. The spring operation device of claim 7 , wherein the power transmission unit includes:
a closing actuating plate coupled to the closing shaft in such a manner that rotational behavior thereof is the same as that of the closing shaft;
a breaking actuating plate coupled to the breaking shaft such that rotational behavior thereof is the same as that of the breaking shaft, receiving rotational force from the closing actuating plate when a closing operation is performed, and rotated independently of the closing actuating plate when a breaking operation is performed and when the closing spring is charged; and
a clutch unit provided on the closing actuating plate and the breaking actuating plate, and transmitting rotational force from the closing actuating plate to the breaking actuating plate when a closing operation is performed.

9. The spring operation device of claim 8 , further comprising a charging cam rotating the closing actuating plate in a direction in which the closing spring is charged.

10. The spring operation device of claim 9 , further comprising a driving unit rotating the charging cam.

11. The spring operation device of claim 8 , further comprising a closing latch restraining rotation of the closing actuating plate, and releasing the rotational restraint of the closing actuating plate when a closing operation is performed.

12. The spring operation device of claim 8 , further comprising a breaking latch restraining rotation of the breaking actuating plate and releasing the rotational restraint of the breaking actuating plate when a breaking operation is performed.

13. The spring operation device of claim 8 , wherein the clutch unit includes:
a clutch frame provided on the breaking actuating plate;
a clutch bar provided on the closing actuating plate, moved or rotated to be disposed in a first position or a second position, and fastened to the clutch frame in the first position, and separated from the clutch frame in the second position,
wherein the clutch bar is disposed in the first position when the closing actuating plate is rotated at a charging completion rotation angle of the closing spring, and disposed in the second position when the closing actuating plate is rotated at a closing completion rotation angle.

14. The spring operation device of claim 13 , further comprising a closing side support plate, to which the closing shaft is rotatably coupled, disposed to face one side of the closing actuating plate.

15. The spring operation device of claim 14 , wherein the clutch bar is rotatably provided on both sides of the closing actuating plate and has a clutch roller protruding from one side of the closing actuating plate, and
the closing side support plate has a connection cam pressing the clutch roller upwardly to rotate the clutch bar to the first position when the closing actuating plate is rotated at a charging completion rotation angle of the closing spring and a release cam pressing the clutch roller downwardly to rotate the clutch bar to the second position when the closing actuating plate is rotated at a closing completion rotation angle.

16. The spring operation device of claim 1 , wherein the plurality of breaking springs are charged through rotational force from the closing shaft and the breaking shaft rotated by elastic restoring force from the plurality of closing springs when a closing operation is performed.

17. The spring operation device of claim 14 , further comprising a closing side support plate to which the breaking shaft is rotatably coupled,
the power transmission unit is provided between the closing side support plate and the breaking side support plate,
the plurality of closing springs are disposed on an outer side of the closing side support plate, and
the plurality of breaking springs are disposed on an outer side of the breaking side support plate.

18. The spring operation device of claim 1 , further comprising an elasticity transmission member coupled to the closing shaft in such a manner that rotational behavior thereof is the same as that of the closing shaft, and extending in a radial direction of the closing shaft, the plurality of springs being connected to an outer portion of the elasticity transmission member.

Assignees

• Hyun Dai Heavy Ind Co Ltd
• Hyundai Electric & Energy Systems Co Ltd

Inventors

• Ahn Il Chul
• Choi Kyu Bok
• Kim Young Sung
• Bajnay Zoltán
• Lévai Balázs
• Bakos Csanád

Classifications

• H01H3/38 Primary

  using spring or other flexible shaft coupling · CPC title

• H01H3/3015

  using cam devices · CPC title

• H01H2003/3063

  Decoupling charging handle or motor at end of charging cycle or during charged condition · CPC title

• H01H3/3026 Primary

  in which the closing spring charges the opening spring or vice versa · CPC title

• H01H33/40 Primary

  using spring motor · CPC title