TWI443703B - Stuck breaker rotary mechanism - Google Patents

Description

Rotary stuck mechanism for circuit breaker

The invention provides a rotary locking mechanism for a circuit breaker, which is abnormal in the circuit system and can quickly cut off the circuit to protect the safety of the circuit system.

1 shows a cross-sectional view of a conventional circuit breaker 1, which includes a casing 2, a handle mechanism 3, an electrode device 4, and a trip portion 5. The electrode device 4 includes a rotation clamping mechanism 6, an arc extinguishing chamber 7a, 7b, a power source side terminal 8, a load side terminal 9, a fixed contact 10a, 10b fixed to the power source side terminal 8 and the load side. On terminal 9. The rotation locking mechanism 6 and the arc extinguishing chambers 7a, 7b are mounted in the electrode device 4. The function of the handle mechanism 3 is to switch between ON and OFF. When the handle mechanism 3 is in the input state, the movable contacts 13a, 13b and the fixed contacts 10a, 10b of the rotation locking mechanism 6 The contact causes the circuit to be turned on; when the handle mechanism 3 is in the OFF state, the movable contacts 13a, 13b of the rotary chucking mechanism 6 are separated from the fixed contacts 10a, 10b, forcing the circuit to be cut. The arc extinguishing chambers 7a, 7b function to extinguish the arc generated when the movable contacts 13a, 13b are separated from the fixed contacts 10a, 10b. The function of the trip portion 5 is to drive the handle mechanism 3 to perform the operation of cutting off the circuit under current overload or short-circuit current.

As shown in FIG. 1B, the rotation locking mechanism 6 includes a rotor seat 11; a movable member 12 is mounted in the rotor base 11; a movable contact 13a, 13b is coupled to both ends of the movable member 12; and two pressures are applied. The spring 14, one end of each of the pressure receiving springs 14 is coupled to the movable member 12 by a spring pin 15a, and the other end is fixed to the rotor base 11 by a spring pin 15b. When the circuit breaker is switched from OFF to input, the rotor seat 11 drives the movable member 12 to rotate, so that the movable contacts 13a, 13b are in contact with the fixed contacts 10a, 10b; when the input is switched to OFF, the rotor seat 11 drives the movable member 12 to rotate. The movable contacts 13a, 13b are separated from the fixed contacts 10a, 10b. One end of each of the pressure-receiving springs 14 is coupled to the movable member 12 by a spring pin 15a, and the other end is fixed to the rotor base 11 by a spring pin 15b. When the circuit breaker is in the input state, the pressure-receiving spring 14 can generate a force via The movable member 12 is transmitted between the contacts as a contact pressure.

Figure 1C shows a schematic view of the rotation locking mechanism 6 in a stuck state. When the short-circuit current passes, the electromagnetic repulsion between the movable contacts 13a, 13b and the fixed contacts 10a, 10b will first push the movable member 12 to the stuck state. In order to separate the movable contacts 13a, 13b from the fixed contacts 10a, 10b, the trip portion 5 drives the handle mechanism 3 to perform the tripping action.

There are several inherent problems with the rotation locking mechanism 6 when it is actuated: 1. The movable member 12 has no central axis, which causes the movable member 12 to generate a severe translational movement when it is actuated. 2. When the locking mechanism 6 is in the stuck state, the spring pin 15b rubs against the movable member 12 to easily wear it. 3. When the jamming action is not smooth, there will be problems with the card being stuck.

The main object of the present invention is to provide a rotary locking mechanism for a circuit breaker, wherein a movable contact is respectively coupled to both ends of the movable member, and a central hole of the movable body is coupled with a central hole of the rotor seat by the central axis, and the movable member is Installed in the rotor seat, a pair of link assemblies are coupled to the movable member, and a pressure spring is mounted on both sides of the rotor seat, and the spring force is transmitted to the movable member through the link assembly, so that the circuit breaker is sufficient when the input state is in the input state. Contact pressure. When the short-circuit current passes, the movable member quickly rotates to the stuck position to separate the movable contact from the fixed contact to cut off the circuit.

2 is a perspective view showing the rotary locking mechanism 20 of the circuit breaker of the present invention mounted on the electrode device 50, and located between the power source side terminal 51 and the load side terminal 52; when the circuit breaker is in the input state, the movable connection of the rotation locking mechanism 20 is rotated. The points 35a and 35b are in contact with the fixed contacts 53a and 53b on the power source side terminal 51 and the load side terminal 52. At this time, a current flows from the power source side terminal 51 and flows out from the load side terminal 52. When the circuit breaker is in the OFF or trip state, the movable contacts 35a, 35b of the rotary chucking mechanism 20 are separated from the fixed contacts 53a, 53b on the power supply side terminal 51 and the load side terminal 52, and the current cannot be supplied from the power supply side terminal. 51 inflows.

As shown in FIG. 3 and FIG. 4, the rotation locking mechanism 20 includes a rotor seat 21 and a movable member 30. The rotor seat 21 has a central hole 22 for receiving a central shaft 40. The central shaft 40 can be positioned. Contacting the pressure at both ends of the balance; the lateral receiving groove 23 can be used to receive the movable member 30; the pair of sliding grooves 24 are respectively located above and below the central hole 22, and the sliding groove 24 can receive a sliding pin 41 and The slide pin 41 is slidable in the slide groove 24, and the slide pin 41 is coupled with the link assembly 32 to control the moving direction of the movable member 30; a pair of grooves 25a, 25b are formed at the peripheral edge of the rotor seat 21, so that the spring pin 42a 42b is movable within the recesses 25a, 25b; and a pair of drive pin holes 26a, 26b for coupling with the handle mechanism.

The movable member 30 has a center hole 31 having a smaller diameter than the center hole 22 of the rotor seat 21, and the movable shaft is inserted when the center shaft 40 is inserted into the center hole 22 of the rotor seat 21 and the center hole 31 of the movable member 30. 30 is rotated about the central axis 40 and translated in a small amplitude; a pair of link assemblies 32 are mounted in opposite directions at the upper and lower ends of the movable member 30, and each of the link assemblies 32 is respectively connected by two links 33, 34. Cooperating, and correspondingly, the connecting rod shaft 43 can pass through the shaft hole on the connecting rods 33, 34, and each of the connecting rod assemblies 32 rotates around the connecting rod shaft 43; and the two movable joints 35a, 35b They are respectively fixed to the front and rear ends of the movable member 30.

The top ends of the links 33, 34 have an open slot for a spring pin 42a, 42b to be placed in the open slot and move within the recess 25a, 25b of the rotor seat 21.

One end of the spring pins 42a, 42b is commonly mounted with a pressure receiving spring 36, and the other ends of the spring pins 42a, 42b are commonly mounted with a pressure receiving spring 37. The above combination can be completed by combining a movable right cover 38 and a movable left cover 39 with the rotor base 21.

Figure 5 is a schematic view showing the state in which the rotating latching mechanism of the present invention is in an engaged state, the force of the pressing springs 36, 37 is converted into forces F1 and F2 via the connecting rods 33, 34, the force F2 is absorbed by the rotor seat 21, and the force F1 acts on The movable member 30 serves as a source of contact pressure between the movable contacts 35a and 35b and the fixed contacts 53a and 53b.

Figure 6 is a schematic view showing the stuck state of the rotating latching mechanism of the present invention. When a short-circuit current occurs in the circuit, a large current flows through the circuit breaker, and an electromagnetic repulsion force generated between the movable contacts 35a, 35b and the fixed contacts 53a, 53b The movable member 30 is rotated clockwise around the central axis 40 until the sliding pin 41 comes into contact with the movable member 30 to stop. At this time, the force of the pressing springs 36, 37 is converted into the forces F3 and F4 via the connecting rods 33, 34, and the force F4 is absorbed by the rotor seat 21, and F3 acts on the movable member 30 to prevent the movable member from rotating counterclockwise to ensure that the movable contact 35a, 35b is separated from the fixed contact 53a, 53b; until the handle mechanism completes the tripping action, the rotation The stuck mechanism 20 is released from the stuck state.

(previous technology)

1. . . breaker

2. . . shell

3. . . Handle mechanism

4. . . Electrode device

5. . . Jump off

6. . . Rotating stuck mechanism

7a, 7b. . . Arc extinguishing chamber

8. . . Power supply side terminal

9. . . Load side terminal

10a, 10b. . . Fixed contact

13a, 13b. . . Movable contact

11. . . Rotor seat

12. . . Movable

13a, 13b. . . Movable contact

14. . . Pressure spring

15a, 15b. . . Spring pin

(this invention)

20‧‧‧Rotating stuck mechanism

21‧‧‧ rotor seat

22‧‧‧ center hole

23‧‧‧ lateral bearing groove

24‧‧‧ sliding slot

25a, 25b‧‧‧ grooves

26a, 26b‧‧‧ drive pin holes

30‧‧‧ movable

31‧‧‧ center hole

32‧‧‧ Connecting rod assembly

33, 34‧‧‧ linkage

35a, 35b‧‧‧ movable joints

36, 37‧‧‧Connecting spring

38‧‧‧ movable sub-cover

39‧‧‧ movable left cover

40‧‧‧ center axis

41‧‧‧Slide pin

42a, 42b‧‧ ‧ spring pin

43‧‧‧Connector shaft

50‧‧‧electrode device

51‧‧‧Power side terminal

52‧‧‧Load side terminal

53a, 53b‧‧‧ fixed joints

Figure 1A is a schematic diagram of the internal structure of a conventional circuit breaker.

Figure 1B is a schematic view of the rotating stuck mechanism of Figure 1.

FIG. 1C is a schematic view showing the state in which the rotation locking mechanism of FIG. 1 is stuck.

Figure 2 is a perspective view of the rotating carding mechanism of the present invention mounted on an electrode device.

Figure 3 is a perspective view of the spin-and-lock mechanism of the present invention.

Figure 4 is an exploded perspective view of the spin-staying mechanism of the present invention.

FIG. 5 is a schematic view showing the state of the rotating stuck mechanism of the present invention.

Figure 6 is a schematic view showing the stuck state of the rotating jamming mechanism of the present invention.

20. . . Rotating stuck mechanism

twenty one. . . Rotor seat

26a, 26b. . . Drive pin hole

30. . . Movable

33, 34. . . link

35a, 35b. . . Movable contact

36, 37. . . Pressure spring

38. . . Movable right cover

39. . . Movable left cover

41. . . Slide pin

42a, 42b. . . Spring pin

Claims (2)

A rotary locking mechanism for a circuit breaker, comprising: a rotor seat having a central hole and a sliding slot above and below the central hole; and a movable body having a central hole for a central axis to pass through the rotor seat a central hole and a central hole of the movable member, the rotor seat can drive the movable member to rotate; the two movable contacts are combined with the two ends of the movable member; and the pair of connecting rod assemblies are respectively composed of two connecting rods, and The connecting rod and the movable member are coupled by a connecting rod shaft, and are disposed in the opposite direction above and below the movable member, and each of the connecting rod assemblies is rotated around the connecting rod shaft, and the connecting rod top has an open slot A spring pin can be commonly received, and the link assembly is respectively disposed with a spring pin. One end of the two spring pins is commonly connected with a pressure spring, and the other end is also connected with a pressure spring, and is respectively located at the side of the rotor seat. And a sliding pin respectively passes through the pair of link assemblies and contacts the sliding groove of the rotor seat to control the moving direction of the movable member. The rotary latching mechanism of claim 1, wherein the central bore diameter on the rotor seat is larger than the central shaft diameter for positioning and balancing the contact pressure at both ends.