Crossbar assembly and trip assembly comprising same

Patent metadata

Field	Value
Publication number	US-12278071-B2
Application number	US-202017756063-A
Country	US
Kind code	B2
Filing date	Apr 9, 2020
Priority date	Nov 18, 2019
Publication date	Apr 15, 2025
Grant date	Apr 15, 2025

Abstract

A crossbar assembly and a trip assembly comprising same are disclosed. The crossbar assembly according to an embodiment of the present disclosure comprises a crossbar and an instant bar. The crossbar and the instant bar can be rotatably coupled so as to be rotatable around the same rotary shaft. Therefore, the space required for rotation can be reduced to be less than when the crossbar and the instant bar are individually rotated. In addition, the crossbar can move in a longitudinal direction when coupled to the instant bar. Therefore, a metallic bar for movement of the crossbar is unnecessary. Therefore, interference between different-phase currents flowing through the trip assembly can be minimized.

First claim

The invention claimed is:

1. A crossbar assembly comprising:
a crossbar extending in one direction, and configured to rotate in response to an overcurrent flowing in a circuit associated with a circuit breaker in which the crossbar assembly is disposed to perform a trip operation of the circuit breaker; and
an instant bar extending in the one direction and rotatably coupled to the crossbar, and configured to rotate independently of rotation of the crossbar in response to a fault current flowing in the circuit to perform the trip operation,
wherein the crossbar comprises:
an insertion space portion formed through an inside of the crossbar in the one direction, accommodating the instant bar, and having one side facing the instant bar open;
a first body portion extending in the one direction and surrounding a part of the insertion space portion; and
a second body portion extending in the one direction and surrounding another part of the insertion space portion.

2. The crossbar assembly of claim 1 , wherein each of the first body portion and the second body portion has an arcuate cross-section, and
wherein one end portion of the first body portion in an arcuate direction and one end portion of the second body portion in the arcuate direction are spaced apart from each other at the one side at which the insertion space portion is open.

3. The crossbar assembly of claim 2 , wherein the cross-section of the first body portion and the cross-section of the second body portion are formed in an arcuate shape having the same center.

4. The crossbar assembly of claim 2 , wherein the instant bar comprises an instant bar body part extending in the one direction, rotatably inserted into the insertion space portion, and having a rounded outer circumferential surface, and
wherein the instant bar body part is formed such that a minimum distance from a central axis in the extending direction to the outer circumferential surface is longer than a distance between the one end portion of the first body portion and the one end portion of the second body portion.

5. The crossbar assembly of claim 4 , wherein the first body portion of the crossbar comprises a movement limiting groove formed therethrough and extending by a predetermined length in the one direction, and
wherein the instant bar body part facing the crossbar comprises a movement limiting protrusion protruding from one side thereof toward the crossbar and inserted through the movement limiting groove.

6. The crossbar assembly of claim 5 , wherein the movement limiting protrusion comprises:
a first portion extending from the outer circumferential surface of the one side of the instant bar body part to form a predetermined angle with the outer circumferential surface of the one side; and
a second portion extending from an end of the first portion to form a predetermined angle with the first portion.

7. The crossbar assembly of claim 1 , wherein the instant bar is coupled to the crossbar to be movable in the one direction.

8. The crossbar assembly of claim 7 , wherein an extended length of the instant bar is shorter than an extended length of the crossbar.

9. A trip device comprising:
a frame with an inner space;
a shooter rotatably coupled to the frame; and
a crossbar assembly rotatably coupled to the frame to be brought into contact with or separated from the shooter,
wherein the crossbar assembly comprises:
a crossbar extending in one direction and including an insertion space portion formed through an inside thereof in the one direction, and configured to rotate in response to an overcurrent flowing in a circuit associated with the trip device to perform a trip operation of the trip device; and
an instant bar extending in the one direction and rotatably coupled to the insertion space portion of the crossbar, and configured to rotate independently of the crossbar in response to a fault current flowing in the circuit to perform the trip operation.

10. The trip device of claim 9 , wherein the instant bar comprises a rotation shaft located on each end portion of the instant bar in the extending direction and rotatably coupled to the frame.

11. The trip device of claim 9 , wherein the crossbar comprises:
a shooter contact part protruding toward the shooter; and
a contact hook portion extending from an end portion of the shooter contact part toward the shooter while forming a predetermined angle with the shooter contact part, and
wherein the shooter comprises a shooter hook portion brought into contact with the contact hook portion and extending toward the shooter contact part.

12. The trip device of claim 9 , wherein the crossbar comprises:
a first body portion extending in the one direction and surrounding a part of the insertion space portion; and
a second body portion extending from the first body portion in the one direction and surrounding another part of the insertion space portion, and
wherein the second body portion extends to be shorter than the first body portion, and is provided in plurality, the plurality of second body portions being spaced apart from one another by predetermined distances.

13. The trip device of claim 12 , wherein the instant bar comprises an elastic member coupling part having a coupling groove to which an elastic member is coupled, and protruding from the instant bar, and
wherein the elastic member coupling part is inserted into a movement groove that is a space defined between the plurality of second body portions.

14. The trip device of claim 13 , wherein the instant bar is coupled to the crossbar to be movable relative to the crossbar in the one direction or in another direction opposite to the one direction, and
wherein the elastic member coupling part is moved in the one direction or the another direction between an end portion in the one direction of any one second body portion of adjacent second body portions and an end portion in another direction of the second body portion.

15. The trip device of claim 9 , wherein the crossbar comprises a movement limiting groove formed through an outer circumferential surface thereof by a predetermined distance in the one direction in which the crossbar extends, and
wherein the instant bar comprises a movement limiting protrusion protruding toward the movement limiting groove and coupled through the movement limiting groove.

Assignees

• Ls Electric Co Ltd

Inventors

• Lim Jeongjae

Classifications

• H01H71/2472

  with rotatable armatures · CPC title

• H01H71/025

  Constructional details of housings or casings not concerning the mounting or assembly of the different internal parts · CPC title

• H01H71/7418

  Adjusting both electrothermal and electromagnetic mechanism · CPC title

• H01H71/402

  in which the thermal mechanism influences the magnetic circuit of the electromagnetic mechanism · CPC title

• H01H71/7445

  Poly-phase adjustment · CPC title