Circuit breaker tripping mechanism

Patent metadata

Field	Value
Publication number	US-10490377-B2
Application number	US-201615750217-A
Country	US
Kind code	B2
Filing date	Aug 20, 2016
Priority date	Aug 4, 2015
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

A tripping mechanism for a circuit breaker comprises a connecting rod assembly and a control assembly, wherein one end of the connecting rod assembly is connected with a rotating shaft assembly for driving the circuit breaker to be switched off in a driving manner, and the other end of the connecting rod assembly is provided with a jump pin which can be connected with the control assembly in a latching manner, and the jump pin is also provided with a U-shaped groove. The control assembly comprises a switching-off latch which is rotatably mounted. The end part of the switching-off latch can be connected with the U-shaped groove in a latching and limiting manner, and the circuit breaker triggers the end part of the switching-off latch to be tripped from the U-shaped groove when being switched off, and therefore the rotating shaft assembly connected with the connecting rod assembly drives the circuit breaker to be switched off. The tripping mechanism for the circuit breaker, which is provided by the present invention, is stable in latching, simple in structure and accurate in action.

First claim

The invention claimed is:

1. A tripping mechanism for a circuit breaker, comprising a connecting rod assembly and a control assembly, wherein one end of the connecting rod assembly is connected with a rotating shaft assembly for driving the circuit breaker to be switched off in a driving manner, and the other end of the connecting rod assembly is provided with a jump pin which can be connected with the control assembly in a latching manner; the jump pin is also provided with a U-shaped groove; the control assembly comprises a switching-off latch which is rotatably mounted; the end part of the switching-off latch can be connected with the U-shaped groove in a latching and limiting manner, and the circuit breaker triggers the end part of the switching-off latch to be tripped from the U-shaped groove when being switched off, and therefore the rotating shaft assembly connected with the connecting rod assembly drives the circuit breaker to be switched off;
the control assembly further comprises a switching-off half-shaft which can be connected with the switching-off latch in a latching manner; two ends of the switching-off latch are respectively provided with a latch bearing and a latch tail end; the latch bearing is connected with the U-shaped groove in a latching and limiting manner; the latch tail end is connected with a semicircular plane in the middle of the switching-off half-shaft in a latching manner.

2. The tripping mechanism for the circuit breaker according to claim 1 , wherein the edge of the jump pin is provided with a jump pin hook; a jump pin spring is mounted between the jump pin hook and the corresponding spring fixing shaft, and the spring fixing shaft is mounted at one side of the latch tail end.

3. The tripping mechanism for the circuit breaker according to claim 1 , wherein an inner wall of the U-shaped groove comprises a lower U-shaped groove plane and an upper U-shaped groove plane which face each other; the latch bearing can be in contact and connection with the lower U-shaped groove plane and the upper U-shaped groove plane respectively in a process from switching-off energy storage to switching-on energy release.

4. The tripping mechanism for the circuit breaker according to claim 1 , wherein one end of the switching-off half-shaft is connected with a switching-off guide rod for a switching-off operation in a driving manner; the switching-off guide rod can push the switching-off half-shaft to rotate, such that the semicircular plane is tripped from the latch tail end, and therefore, the latch bearing is tripped from the U-shaped groove to finish a switching-off operation.

5. The tripping mechanism for the circuit breaker according to claim 4 , wherein one end of the switching-off guide rod is a switching-off guide rod trigger end which is in contact and connection with a switching-off button, and the other end of the switching-off guide rod is a switching-off guide rod driving end which is in contact and connection with a switching-off plane of the switching-off half-shaft; the switching-off guide rod is also provided with a switching-off guide rod limiting groove configured to guide and limit and a switching-off guide rod spring hook configured to pull and reset.

6. The tripping mechanism for the circuit breaker according to claim 4 , wherein the other end of the switching-off half-shaft is provided with a switching-off half-shaft limiting plane which is in contact and connection with a switching-on guide rod; a switching-on guide rod positioning hole is formed in the middle of the switching-on guide rod; one end of the switching-on guide rod is provided with a switching-on guide rod limiting boss which is in contact and connection with the switching-off half-shaft limiting plane, and the other end of the switching-on guide rod is in contact and connection with the switching-on half-shaft for a switching-on operation; the switching-off half-shaft limiting plane can push the switching-on guide rod limiting boss from bottom to top to drive the switching-on guide rod to rotate around the switching-on guide rod positioning hole, thereby enabling the end part of the switching-on guide rod to move to one side of the switching-on half-shaft.

7. The tripping mechanism for the circuit breaker according to claim 5 , wherein the switching-off half-shaft is provided with a switching-off half-shaft driving plane which is in contact and connection with a tripping system of the circuit breaker; the tripping system can drive the switching-off half-shaft driving plane to drive the switching-off half-shaft to rotate; the switching-off half-shaft driving plane and the switching-off plane are respectively arranged at two ends of the switching-off half-shaft and are relatively perpendicular in position.

8. The tripping mechanism for the circuit breaker according to claim 1 , wherein the connecting rod assembly comprises a jump pin, a first connecting rod and a second connecting rod which are rotatably connected in sequence; the end part of the second connecting rod is connected with the rotating shaft assembly in a driving manner to pull the rotating shaft assembly to finish the switching-on/switching-off operation; the jump pin is of a quadrangular structure, wherein four end parts of the quadrangular structure are sequentially provided with a jump pin connecting end connected with the first connecting rod, a U-shaped groove connected with the control assembly in a latching manner, a jump pin hook connected with the jump pin spring and a jump pin mounting hole connected with the driving shaft.

9. The tripping mechanism for the circuit breaker according to claim 8 , wherein the jump pin is arranged at one side of the first connecting rod, and the energy storage assembly for storing energy is also arranged at the other side of the first connecting rod; the jump pin always moves at one side of the first connecting rod; the energy storage assembly comprises an energy storage lever mounted on the energy storage mounting shaft; the main tension springs for switching off and resetting the rotating shaft assembly are also mounted between the energy storage mounting shaft and the connecting pin.

Assignees

• Zhejiang Chint Electrics Co Ltd
• Seari Electric Technology Co Ltd

Inventors

• Pan Binhua
• Sun Jisheng

Classifications

• H01H71/12 Primary

  Automatic release mechanisms with or without manual release · CPC title

• H01H71/528

  comprising a toggle or collapsible link between handle and contact arm, e.g. sear pin mechanism · CPC title

• H01H71/1009 Primary

  Interconnected mechanisms (H01H71/1045 takes precedence; operated by excess current and other electrical conditions H01H83/20) · CPC title

• H01H71/505

  Latching devices between operating and release mechanism · CPC title

• H01H9/20

  Interlocking, locking, or latching mechanisms · CPC title