CN209804569U

CN209804569U - Auxiliary tripping structure

Info

Publication number: CN209804569U
Application number: CN201920885305.3U
Authority: CN
Inventors: 沈平
Original assignee: JIANGSU KAILONG ELECTRONICS CO Ltd
Current assignee: JIANGSU KAILONG ELECTRONICS CO Ltd
Priority date: 2019-06-13
Filing date: 2019-06-13
Publication date: 2019-12-17
Anticipated expiration: 2029-06-13

Abstract

The utility model relates to an auxiliary tripping structure, which is arranged in a circuit breaker; the circuit breaker comprises a moving contact and a fixed contact; the auxiliary tripping structure comprises a transmission part and an electromagnetic mechanism which are arranged in the circuit breaker; the transmission piece comprises a first connecting rod and a second connecting rod which are hinged through a hexagonal shaft; the electromagnetic mechanism comprises a movable iron core, a static iron core, a bracket and a metal shaft; the bracket is arranged on the static contact; the metal shaft and the bracket are fixed on the bracket in parallel; the movable iron core is rotatably arranged on the metal shaft; the static iron core is inserted in the bracket; when the static contact passes through the current, the magnetic force generated by the static iron core enables the movable iron core to rotate around the metal shaft under the action of the magnetic force; the moving iron core pushes the second connecting rod to rotate around the hexagonal shaft while rotating, the hexagonal shaft drives the first connecting rod to rotate, and the first connecting rod pushes the moving contact to be separated from the static contact. The utility model discloses a tripping structure is simple, the intermediate drive is few, and the fault rate is low, and is fast, can shorten the breaking time of circuit breaker, improve the breaking capacity of circuit breaker.

Description

Auxiliary tripping structure

Technical Field

The utility model relates to a low-voltage apparatus technical field, in particular to supplementary dropout structure.

Background

The low-voltage circuit breaker is also called an automatic air switch or an automatic air circuit breaker, and is called a circuit breaker for short. It is an electric appliance which not only has the function of manual switch, but also can automatically carry out voltage loss, undervoltage, overload and short-circuit protection. It can be used to distribute electric energy, start asynchronous motor infrequently, and protect power supply circuit and motor.

When the short-circuit fault of the existing low-voltage circuit breaker is disconnected, the short-circuit fault is generally operated through an electromagnetic mechanism, the electromagnetic release is one of releases, only provides magnetic protection, namely short-circuit protection, and actually is a magnetic return force, when the current is large enough, the generated magnetic field force overcomes a counter-force spring to attract an armature to strike a traction rod, the traction rod is pushed to turn over, the traction rod drives a buckle to be released, then an upper connecting rod and a lower connecting rod are reset to drive a rotating shaft to turn over, and finally, a moving contact and a static contact are separated to complete, so that the mechanism is driven to operate and cut.

In the whole process, four force transmissions are needed from the action of the electromagnetic mechanism to the separation of the moving contact and the fixed contact, but the more the number of the intermediate transmissions is, the longer the time consumption is, the higher the fault probability is, and the short-circuit breaking capacity is reduced.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model discloses an auxiliary tripping structure.

The utility model discloses the technical scheme who adopts as follows:

An auxiliary trip structure installed in a circuit breaker; the circuit breaker comprises a moving contact and a fixed contact; the auxiliary tripping structure comprises a transmission part and an electromagnetic mechanism which are arranged in the circuit breaker; the transmission piece comprises a first connecting rod and a second connecting rod which are hinged through a hexagonal shaft; the electromagnetic mechanism comprises a movable iron core, a static iron core, a bracket and a metal shaft; the bracket is arranged on the static contact; the metal shaft and the bracket are fixed on the bracket in parallel; the movable iron core is rotatably arranged on the metal shaft; the static iron core is inserted in the bracket; when the static contact passes through the current, the magnetic force generated by the static iron core enables the movable iron core to rotate around the metal shaft under the action of the magnetic force; the moving iron core pushes the second connecting rod to rotate around the hexagonal shaft while rotating, the hexagonal shaft drives the first connecting rod to rotate, and the first connecting rod pushes the moving contact to be separated from the static contact.

the method is further characterized in that: the hexagonal shaft is mounted on the cover of the circuit breaker.

The method is further characterized in that: the first connecting rod comprises a first connecting part, a first bending part and a second connecting part which are integrally formed; the section of the first connecting part is rectangular; the section of the second connecting part is circular; the first bending part is used for transitionally connecting the first connecting part and the second connecting part in an arc shape; the second connecting rod comprises a third connecting part, a fourth connecting part, a second bending part and a fifth connecting part which are integrally formed; the section of the third connecting part is circular; the fifth connecting part is inclined upwards at 45 degrees and faces the outer side of the circuit breaker; the second bending part is used for transitionally connecting the fourth connecting part and the fifth connecting part at right angles.

The method is further characterized in that: the through holes are formed in the second connecting portion and the third connecting portion, and the hexagonal shaft sequentially penetrates through the through holes of the second connecting portion and the third connecting portion to enable the first connecting rod and the second connecting rod to be hinged.

The method is further characterized in that: the circuit breaker further comprises a bottom plate and a base; a moving contact, a fixed contact, a cover and an operating mechanism are arranged between the bottom plate and the base; concave cavities are formed in the bottom plate and the base; the moving contact and the static contact are respectively arranged in the concave cavities of the base plate and the base; the operating mechanism is arranged on the base; the operating mechanism and the movable contact form a movable insulated mechanical connection.

The utility model has the advantages as follows:

When the circuit has the short-circuit fault current, the utility model discloses a tripping structure is simple, the intermediate drive is few, and the fault rate is low, and is fast, can shorten the breaking time of circuit breaker, improve the breaking capacity of circuit breaker. Specifically, the static contact passes through the current, makes the static iron core produce powerful magnetic force, moves the iron core and rotates around the metal axle under the magnetic force effect, moves the iron core and promotes the second connecting rod and rotates around the hexagonal axle when rotating a certain position, and the hexagonal axle drives first connecting rod and rotates and promote the moving contact downwards, makes the moving contact separate from the static contact.

The utility model discloses further improve the reliability of circuit breaker, guaranteed the quality of product.

Drawings

Fig. 1 is a schematic view of the present invention.

FIG. 2 is a schematic view of the transmission member of FIG. 1.

Fig. 3 is a schematic view of the electromagnetic mechanism of fig. 1.

Fig. 4 is a schematic diagram of the present invention for separating the moving contact from the static contact.

In the figure: 10. a moving contact; 20. a base; 30. static contact; 40. a cover; 50. an operating mechanism; 60. A transmission member; 61. a hexagonal shaft; 62. a first link; 621. a first connection portion; 622. a first bent portion; 623. a second connecting portion; 63. a second link; 631. a third connecting portion; 632. a fourth connecting portion; 633. a second bent portion; 634. a fifth connecting part; 70. an electromagnetic mechanism; 71. a movable iron core; 72. a stationary iron core; 73. a support; 74. a metal shaft.

Detailed Description

The following describes a specific embodiment of the present embodiment with reference to the drawings.

Fig. 1 is a schematic view of the present invention, and fig. 2 is a schematic view of a transmission member in fig. 1. Referring to fig. 1 and 2, an auxiliary trip structure includes a transmission member 60 and an electromagnetic mechanism 70 installed inside a circuit breaker. The transmission 60 includes a first link 62 and a second link 63 hinged by a hexagonal shaft 61. Specifically, one end of the first link 62 is provided with a first through hole. One end of the second link 63 is provided with a second through hole. The hexagonal shaft 61 sequentially passes through the first and second through holes to hinge the first and second links 62 and 63. The hexagonal shaft 61 is mounted in a recess provided in the cover 40 of the circuit breaker.

The electromagnetic mechanism 70 includes a movable iron core 71, a stationary iron core 72, a bracket 73, and a metal shaft 74. The cradle 73 is mounted on the stationary contact 30 of the circuit breaker. The metal shaft 74 is fixed to the bracket 73 in parallel with the bracket 73. The plunger 71 is rotatably mounted on the metal shaft 74, i.e., the plunger 71 is rotatable around the metal shaft 74. The stationary core 72 is inserted in the bracket 73. When the static contact 30 passes through the current, the magnetic force generated by the static iron core 72 makes the movable iron core 71 rotate around the metal shaft 74 under the action of the magnetic force. The moving iron core 71 rotates and simultaneously pushes the second connecting rod 63 to rotate around the hexagonal shaft 61, the hexagonal shaft 61 drives the first connecting rod 62 to rotate, and the first connecting rod 62 pushes the moving contact 10 to be separated from the static contact 30, so that the circuit breaker is disconnected.

The first link 62 includes a first connecting portion 621, a first bent portion 622, and a second connecting portion 623 that are integrally formed. The first connection portion 621 has a rectangular cross-section. The second connecting portion 623 has a circular cross-section. The first bent portion 622 transitionally connects the first connection portion 621 and the second connection portion 623 in an arc shape.

The second link 63 includes a third connecting portion 631, a fourth connecting portion 632, a second bending portion 633 and a fifth connecting portion 634 which are integrally formed. The third connecting portion 631 has a circular cross-section. The fifth connection portion 634 is inclined upward toward the outside of the breaker frame at 45 °. The second bending portion 633 connects the fourth connecting portion 632 and the fifth connecting portion 634 at a right angle.

The through holes are formed in the second connecting portion 623 and the third connecting portion 631, and the hexagonal shaft 61 sequentially penetrates through the through holes of the second connecting portion 623 and the through holes of the third connecting portion 631 to hinge the first connecting rod 62 and the second connecting rod 63.

The circuit breaker includes a base plate and a base 20. Between the base plate and the base 20, the movable contact 10, the fixed contact 30, the cover 40 and the operating mechanism 50 are installed. Concave cavities are formed in the bottom plate and the base 20. The moving contact 10 and the static contact 30 are respectively installed in the concave cavities of the base plate and the base 20. The operating mechanism 50 is mounted on the base 20. The actuating element 50 is in movable, insulated mechanical connection with the movable contact 10.

Fig. 4 is a schematic diagram of the present invention for separating the moving contact from the static contact. Referring to fig. 1 and 4, when a short-circuit fault current occurs in a line, a static contact 30 passes through a current, so that a static iron core 72 generates a strong magnetic force, a movable iron core 71 rotates around a metal shaft 74 under the action of the magnetic force, when the movable iron core 71 rotates to a certain position, the movable iron core 71 pushes a second connecting rod 63 to rotate around a hexagonal shaft 61, the hexagonal shaft 61 drives a first connecting rod 62 to rotate and pushes a movable contact 10 downwards, and the movable contact 10 is separated from the static contact 30.

The above description is for the purpose of explanation and not limitation of the invention, which is defined in the claims, and any modifications may be made without departing from the basic structure of the invention.

Claims

1. an auxiliary trip structure installed in a circuit breaker; the circuit breaker comprises a movable contact (10) and a fixed contact (30); the method is characterized in that: the auxiliary tripping structure comprises a transmission piece (60) and an electromagnetic mechanism (70) which are arranged inside the circuit breaker; the transmission piece (60) comprises a first connecting rod (62) and a second connecting rod (63) which are hinged through a hexagonal shaft (61); the electromagnetic mechanism (70) comprises a movable iron core (71), a static iron core (72), a bracket (73) and a metal shaft (74); the bracket (73) is arranged on the static contact (30); the metal shaft (74) and the bracket (73) are fixed on the bracket (73) in parallel; the movable iron core (71) is rotatably arranged on the metal shaft (74); the static iron core (72) is inserted in the bracket (73); when the static contact (30) passes through current, the magnetic force generated by the static iron core (72) enables the movable iron core (71) to rotate around the metal shaft (74) under the action of the magnetic force; the moving iron core (71) rotates and simultaneously pushes the second connecting rod (63) to rotate around the hexagonal shaft (61), the hexagonal shaft (61) drives the first connecting rod (62) to rotate, and the first connecting rod (62) pushes the moving contact (10) to be separated from the static contact (30).

2. The auxiliary trip structure according to claim 1, wherein: the hexagonal shaft (61) is mounted on a cover (40) of the circuit breaker.

3. The auxiliary trip structure according to claim 1, wherein: the first connecting rod (62) comprises a first connecting part (621), a first bending part (622) and a second connecting part (623) which are integrally formed; the cross section of the first connecting part (621) is rectangular; the cross section of the second connecting part (623) is circular; the first bending part (622) connects the first connecting part (621) and the second connecting part (623) in a transition way in an arc shape; the second connecting rod (63) comprises a third connecting part (631), a fourth connecting part (632), a second bending part (633) and a fifth connecting part (634) which are integrally formed; the section of the third connecting part (631) is circular; the fifth connecting part (634) is inclined upwards at 45 degrees and faces the outer side of the circuit breaker; the fourth connecting portion (632) and the fifth connecting portion (634) are in right-angle transition connection through the second bending portion (633).

4. The auxiliary trip structure according to claim 3, wherein: the through holes are formed in the second connecting portion (623) and the third connecting portion (631), the hexagonal shaft (61) sequentially penetrates through the through holes of the second connecting portion (623) and the through holes of the third connecting portion (631), and the first connecting rod (62) is hinged to the second connecting rod (63).

5. The auxiliary trip structure according to claim 1, wherein: the circuit breaker further comprises a base plate and a base (20); a moving contact (10), a fixed contact (30), a cover (40) and an operating mechanism (50) are arranged between the bottom plate and the base (20); concave cavities are formed in the bottom plate and the base (20); the moving contact (10) and the static contact (30) are respectively arranged in the cavities of the base plate and the base (20); the operating mechanism (50) is arranged on the base (20); the actuating element (50) is in a movable, insulated mechanical connection with the movable contact (10).