ELECTRICAL SWITCHING APPARATUS AND STORED ENERGY ASSEMBLY THEREFOR

• US 20080296137A1
• Filed: 06/01/2007
• Published: 12/04/2008
• Est. Priority Date: 06/01/2007
• Status: Active Grant

• Current Assignee: Eaton Intelligent Power Limited (Eaton Corporation PLC.)
• Original Assignee: Eaton Corp. (Wisconsin) (Eaton Corporation PLC.)
• Inventors: Benke, James J., Chen, Steven Z., Bottegal, Paul T., Palmieri, Daniel E., Edmunds, Alan K.
• Granted Patent: US 7,696,447 B2
• Time in Patent Office: Days
• US Class Current: 200/400
• CPC Class Codes: H01H 3/3005 Charging means
• CPC Class Codes: H01H 3/3031 Means for locking the spring in a charged state
• CPC Class Codes: H01H 71/70 actuated by electric motor

Abstract

A stored energy assembly is provided for an electrical switching apparatus, such as a circuit breaker. The stored energy assembly includes a mount removably coupled to the circuit breaker housing. A stored energy mechanism, such as a spring, is coupled to the mount and is movable among charged and discharged positions. An actuating element is cooperable with the gears of a gear assembly in order to move among first and second positions corresponding to the spring being disposed in the charged and discharged positions, respectively. A manual charging mechanism and an automatic charging mechanism are coupled to the gear assembly, and move the gears, in order to move the actuating element and charge the spring. The spring, the actuating element, the gear assembly, and the charging mechanisms are coupled to the mount, thereby forming a sub-assembly. The sub-assembly is removably coupled to the circuit breaker housing.

Claims

1. A stored energy assembly for an electrical switching apparatus including a housing, said stored energy assembly comprising:

a mount structured to be removably coupled to said housing;

a stored energy mechanism coupled to said mount and being movable among a charged position and a discharged position;

a gear assembly including a plurality of gears;

an actuating element being cooperable with said gears in order to charge said stored energy mechanism, said actuating element being movable among a first position corresponding to said stored energy mechanism being disposed in said charged position, and a second position corresponding to said stored energy mechanism being disposed in said discharged position;

a first charging mechanism coupled to a corresponding one of said gears; and

a second charging mechanism coupled to said corresponding one of said gears,

wherein each of said first charging mechanism and said second charging mechanism is structured to move said gears, in order to move said actuating element and charge said stored energy mechanism, and

wherein said stored energy mechanism, said actuating element, said gear assembly, said first charging mechanism, and said second charging mechanism are coupled to said mount, thereby forming a sub-assembly which is structured to be removably coupled to said housing of said electrical switching apparatus.

2. The stored energy assembly of claim 1 wherein said mount comprises a first side, a second side, a first end, a second end disposed opposite and distal from the first end, a back structured to be coupled to said housing, and a front structured to be accessible external said housing;

wherein said stored energy mechanism comprises a spring and a mounting assembly structured to mount said spring on the second side of said mount;

wherein said spring has a first end disposed proximate the first end of said mount, a second end extending toward the second end of said mount, and a plurality of coils extending between the first end of said spring and the second end of said spring.

3. The stored energy assembly of claim 2 wherein said mounting assembly comprises a first connector extending outwardly from the second side of said mount at or about the first end of said mount, a second connector coupled to said actuating element, and a guide member extending between said first connector and said second connector;

wherein said spring is disposed between said first connector and said second connector;

wherein said guide member extends through said coils;

wherein, when said actuating element is moved toward said first position, said second connector is structured to move toward said first connector in order to charge said spring; and

wherein, when said actuating element is moved toward said second position, said second connector is structured to move away from said first connector in order to discharge said spring.

4. The stored energy assembly of claim 3 wherein said first charging mechanism is a manual charging mechanism being operable by hand to charge said spring;

wherein said second charging mechanism is an automatic charging mechanism being operable to automatically charge said spring;

wherein said gears include a first gear coupled to the second side of said mount, a second gear coupled to said automatic charging mechanism, and a third gear coupled to said actuating element and being cooperable with said first gear and said second gear; and

wherein said manual charging mechanism is coupled to said automatic charging mechanism and is structured to move said automatic charging mechanism in order to move said second gear.

5. The stored energy assembly of claim 4 wherein said third gear includes a center and a generally circular perimeter;

wherein said actuating element comprises a planar portion and a protrusion extending perpendicularly outwardly from said planar portion;

wherein said planar portion is coupled to said third gear with said protrusion being disposed between said center and said generally circular perimeter;

wherein, when said third gear is pivoted and said actuating element is moved toward said first position, said protrusion of said actuating element moves said second connector in a first direction to compress said spring; and

wherein, when said third gear is pivoted and said actuating element is moved toward said second position, said protrusion of said actuating element moves said second connector in a second direction which is generally opposite said first direction, in order to release said spring.

6. The stored energy assembly of claim 4 wherein said first gear includes a first portion and a second portion;

wherein each of said first portion of said first gear, said second portion of said first gear, said second gear, and said third gear has a plurality of teeth;

wherein said teeth of said first portion of said first gear engage said teeth of said second gear;

wherein said teeth of said second portion of said first gear engage said teeth of said third gear; and

wherein, when one of said gears of said gear assembly is moved, all of said gears move in order to move said actuating element.

7. The stored energy assembly of claim 4 wherein said manual charging mechanism comprises a charging handle and a one-way bearing;

wherein said automatic charging mechanism comprises an electric motor;

wherein said one-way bearing is disposed between said charging handle and said electric motor;

wherein said one-way bearing permits said charging handle to move said electric motor and said second gear only when said charging handle is moved in one predetermined direction;

wherein said gear assembly further includes a shaft coupled to a corresponding one of said gears, and a one-way clutch coupled to said shaft; and

wherein said one-way clutch only permits each of said first gear, said second gear, and said third gear to be operable in one direction.

8. The stored energy assembly of claim 3 wherein said guide member includes a slot;

wherein said actuating element comprises a pin member extending outwardly from a corresponding one of said gears of said gear assembly; and

wherein said pin member extends through said slot and is coupled to said second connector, in order that said pin member and said second connector are movable with respect to said guide member.

9. The stored energy assembly of claim 2 wherein said mount further comprises a first side plate, a second side plate disposed opposite said first side plate, and a number of mounting blocks disposed between said first side plate and said second side plate;

wherein said first charging mechanism is a manual charging mechanism including a charging handle; and

wherein said charging handle is pivotably coupled to said front of said mount between said first side plate and said second side plate.

10. The stored energy assembly of claim 9 wherein said second charging mechanism is an automatic charging mechanism including an electric motor and a gearbox;

wherein said electric motor is substantially disposed on the first side of said mount at or about said first side plate; and

wherein said gearbox is disposed between said first side plate and said second side plate.

11. An electrical switching apparatus comprising:

a housing;

separable contacts;

an operating mechanism comprising a pivotable pole shaft structured to open and close said separable contacts; and

a stored energy assembly comprising;

a mount removably coupled to said housing,

a stored energy mechanism coupled to said mount and being movable among a charged position and a discharged position,

a gear assembly including a plurality of gears,

an actuating element being cooperable with said gears in order to charge said stored energy mechanism, said actuating element being movable among a first position corresponding to said stored energy mechanism being disposed in said charged position, and a second position corresponding to said stored energy mechanism being disposed in said discharged position,

a first charging mechanism coupled to a corresponding one of said gears, and

a second charging mechanism coupled to said corresponding one of said gears,

wherein each of said first charging mechanism and said second charging mechanism moves said gears, in order to move said actuating element and charge said stored energy mechanism, and

wherein said stored energy mechanism, said actuating element, said gear assembly, said first charging mechanism, and said second charging mechanism are coupled to said mount, thereby forming a sub-assembly which is removably coupled to said housing of said electrical switching apparatus.

12. The electrical switching apparatus of claim 11 wherein said mount of said stored energy assembly comprises a first side, a second side, a first end, a second end disposed opposite and distal from the first end, a back, and a front;

wherein said stored energy mechanism of said stored energy assembly comprises a spring and a mounting assembly;

wherein said spring has a first end disposed proximate the first end of said mount, a second end extending toward the second end of said mount, and a plurality of coils extending between the first end of said spring and the second end of said spring;

wherein said mounting assembly comprises a first connector extending outwardly from the second side of said mount at or about the first end of said mount, a second connector coupled to said actuating element, and a guide member extending between said first connector and said second connector;

wherein said spring is disposed between said first connector and said second connector;

wherein said guide member extends through said coils of said spring;

wherein, when said actuating element is moved toward said first position, said second connector moves toward said first connector in order to charge said spring; and

wherein, when said actuating element is moved toward said second position, said second connector moves away from said first connector in order to discharge said spring.

13. The electrical switching apparatus of claim 12 wherein said first charging mechanism of said stored energy assembly is a manual charging mechanism being operable by hand to charge said spring;

wherein said second charging mechanism of said stored energy assembly is an automatic charging mechanism being operable to automatically charge said spring;

wherein said gears of said gear assembly of said stored energy assembly include a first gear coupled to the second side of said mount, a second gear coupled to said automatic charging mechanism and said manual charging mechanism, and a third gear including a center and a generally circular perimeter;

wherein said third gear is cooperable with said first gear and said second gear;

wherein said actuating element comprises a planar portion and a protrusion extending perpendicularly outwardly from said planar portion;

wherein said planar portion is coupled to said third gear with said protrusion being disposed between said center and said generally circular perimeter;

wherein, when said third gear is pivoted and said actuating element is moved toward said first position, said actuating element moves said second connector in a first direction to compress said spring; and

wherein, when said third gear is pivoted and said actuating element is moved toward said second position, said actuating element moves said second connector in a second direction which is generally opposite said first direction, in order to release said spring.

14. The electrical switching apparatus of claim 13 wherein said first gear includes a first portion and a second portion;

wherein each of said first portion of said first gear, said second portion of said first gear, said second gear, and said third gear has a plurality of teeth;

wherein said teeth of said first portion of said first gear engage said teeth of said second gear;

wherein said teeth of said second portion of said first gear engage said teeth of said third gear; and

wherein, when one of said gear of said gear assembly is moved, all of said gears of said gear assembly move in order to move said actuating element.

15. The electrical switching apparatus of claim 13 wherein said manual charging mechanism of said stored energy assembly comprises a charging handle and a one-way bearing;

wherein said automatic charging mechanism comprises an electric motor;

wherein said one-way bearing is disposed between said charging handle and said electric motor;

wherein said one-way bearing permits said charging handle to move said electric motor and said second gear only when said charging handle is moved in one predetermined direction;

wherein said gear assembly further includes a shaft coupled to a corresponding one of said gears, wherein said one-way clutch only permits each of said first gear, said second gear, and said third gear to be operable in one direction.

16. The electrical switching apparatus of claim 12 wherein said mount of said stored energy assembly further comprises a first side plate, a second side plate disposed opposite said first side plate, and number of mounting blocks disposed between said first side plate and said second side plate;

wherein said first charging mechanism of said stored energy assembly is a manual charging mechanism including a charging handle;

wherein said charging handle is pivotably coupled to said front of said mount between said first side plate and said second side plate;

wherein said second charging mechanism is an automatic charging mechanism including an electric motor and a gearbox;

wherein said electric motor is substantially disposed on the first side of said mount at or about said first side plate; and

wherein said gearbox is disposed between said first side plate and said second side plate.

17. The electrical switching apparatus of claim 16 wherein said stored energy assembly further comprises a drive assembly including a drive shaft extending between said first side plate and said second side plate proximate the second end of said mount, and an actuating arm extending outwardly from said drive shaft;

wherein said actuating arm is coupled to said pole shaft of said operating mechanism of said electrical switching apparatus; and

wherein said drive shaft is cooperable with said actuating element and said gear assembly of said stored energy assembly, is structured to move said pole shaft.

18. The electrical switching apparatus of claim 11 wherein said stored energy assembly further comprises at least one manual actuator and at least one accessory;

and wherein each of said at least one manual actuator and said at least one accessory is actuatable in order to actuate said stored energy mechanism of said stored energy assembly.

19. The electrical switching apparatus of claim 18 wherein said stored energy assembly further comprises a first status indicator and a second status indicator;

wherein said first status indicator is coupled to said at least one actuator;

wherein said first status indicator is movable among a first position in which said first status indicator indicates said separable contacts of said electrical switching apparatus are open, and a second position in which said first status indicator indicates said separable contacts of said electrical switching apparatus are closed;

wherein said second status indicator is cooperable with said actuating element; and

wherein said second status indicator is movable among a first position in which said second status indicator indicates said stored energy mechanism of said stored energy assembly is charged, and a second position in which said second status indicator indicates said stored energy mechanism of said stored energy assembly is discharged.

20. The electrical switching apparatus of claim 11 wherein said electrical switching apparatus is a circuit breaker;

wherein said housing of said circuit breaker includes a back, a front, first and second opposing sides, a top, and a bottom extending outwardly from said back to form a cavity;

wherein said mount of said stored energy assembly further comprises a number of fasteners;

wherein said number of fasteners are fastenable to fasten said sub-assembly of said stored energy assembly to said back of said housing;

wherein, when said mount of said stored energy assembly is fastened to said back of said housing, said sub-assembly is disposed within said cavity; and

wherein when said sub-assembly is disposed within said cavity, said front of said mount is accessible at or about said front of said housing of said circuit breaker.