CN110729157A

CN110729157A - Electromagnetic trip and electric leakage circuit breaker with same

Info

Publication number: CN110729157A
Application number: CN201910379669.9A
Authority: CN
Inventors: 冯伟通; 朱型沦
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-05-08
Filing date: 2019-05-08
Publication date: 2020-01-24

Abstract

The invention discloses an electromagnetic release and a leakage circuit breaker, wherein the electromagnetic release comprises a shell, an electromagnetic device and a release trigger mechanism; the electromagnetic device is arranged in the shell, an installation part is arranged at one side end of the shell, the tripping trigger mechanism is installed on the installation part, a through hole is formed in the wall of one side, facing the installation part, of the shell, a push rod is movably arranged in the through hole, and the inner end of the push rod abuts against an armature iron of the electromagnetic device; the tripping trigger mechanism comprises a lock catch, an elastic piece A, a jump buckle, an elastic piece B, a linkage rod and a reset rod; the hasp includes locking arm and actuating arm, is equipped with on the locking arm and detains the platform, and the actuating arm offsets with the outer end of ejector pin, jumps to detain the upper end and has buckling part, and elastic component B makes to jump to detain and keep keeping away from hasp direction pivoted trend, and the gangbar movable mounting is at the lateral part of casing to with jump detain mutually the linkage, have the trigger bar that drives circuit breaker trip bar dropout and drop out on the gangbar. The electromagnetic release provided by the invention is reasonable in structure and reliable and stable in action.

Description

Electromagnetic trip and electric leakage circuit breaker with same

Technical Field

The invention belongs to the field of circuit breaker structural design, and particularly relates to an electromagnetic release and a leakage circuit breaker with the same.

Background

The leakage circuit breaker mainly plays a role in quickly cutting off a power supply and preventing electric shock accidents when people get electric shock or leakage occurs, and some leakage circuit breakers also have overload and short-circuit protection functions or are used for starting and stopping motors infrequently. The electromagnetic release is a key component in the electric leakage circuit breaker, and the sensitivity of the electromagnetic release directly influences the breaking performance of the electric leakage circuit breaker. In an electromagnetic trip of the existing leakage circuit breaker, the force and the stroke output by an electromagnetic device are transmitted to a trip rod through a transmission assembly, and the trip rod moves to drive a circuit breaker operating mechanism to break. However, the number of components and parts formed by the transmission assembly in the existing electromagnetic release is relatively large, the transmission links are many, a part of force loss occurs after the force output by the electromagnetic device is transmitted by the transmission assembly, so that the circuit breaker cannot be effectively released sometimes, and the stability and reliability of the use of the electromagnetic release are relatively poor.

Disclosure of Invention

In view of the above, the present invention aims to provide an electromagnetic release with a reasonable structure, which improves the stability and safety of use.

The technical scheme for realizing the purpose of the invention is as follows:

an electromagnetic release comprises a shell, an electromagnetic device and a release trigger mechanism; the electromagnetic device is arranged in the shell, an installation part is arranged at one side end of the shell, the tripping trigger mechanism is installed at the installation part, a through hole is formed in the wall of one side of the shell, which faces the installation part, of the shell, an ejector rod is movably arranged in the through hole, and the inner end of the ejector rod abuts against an armature of the electromagnetic device; the tripping trigger mechanism comprises a lock catch, an elastic piece A, a jump buckle, an elastic piece B, a linkage rod and a reset rod; the lock catch is rotatably installed on the upper portion of the installation portion through a first connecting shaft and comprises a lock arm and a driving arm, a catch platform is arranged on the lock arm, the driving arm abuts against the outer end of the ejector rod, the elastic acting force provided by the elastic piece A for the lock catch has a tendency of enabling the driving arm to abut against the outer end of the ejector rod, the jump buckle is rotatably connected with the shell through a second connecting shaft, a buckling portion suitable for being buckled with the catch platform is arranged at the upper end of the jump buckle, the elastic acting force provided by the elastic piece B for the jump buckle has a tendency of enabling the driving arm to rotate in a direction far away from the catch, the linkage rod is movably installed on the side portion of the shell and is linked with the jump buckle, and a trigger rod for driving a tripping rod of the circuit breaker is arranged on the linkage rod; the reset rod is suitable for being driven by a rocker arm of the circuit breaker operating mechanism when the circuit breaker is buckled again to drive the jump buckle to rotate and reset towards the lock buckle direction.

In the above technical scheme, the lateral part of casing is equipped with spacing axle, the tip of spacing axle is equipped with keeps off the platform, the bar hole has on the gangbar, the bar hole with spacing axle cooperation, the width in bar hole is less than keep off the diameter of platform.

In the technical scheme, the mounting part is provided with a limiting structure for limiting the rotation range of the jump buckle.

In the above technical scheme, limit structure including the shaping in spacing groove on the installation department with the shaping in jump and detain last spacing boss, spacing boss is in spacing inslot, jump detain around when third connecting axle rotates spacing boss is in spacing inslot removes.

In the technical scheme, one of the jump buckle and the linkage rod is provided with a connecting hole, the other is provided with a connecting rod, and the jump buckle and the linkage rod are matched with the connecting hole through the connecting rod to form a linkage connecting structure.

In the above technical scheme, the elastic member a is a torsion spring; the elastic piece B is a tension spring.

In the above technical scheme, the magnetic steel in the electromagnetic device is made of alnico.

In the technical scheme, the reset rod is rotatably installed on the lateral part of the shell through a third connecting shaft, the reset rod is provided with a first driving part and a second driving part, the first driving part is located on one side, back to the lock catch, of the jump buckle, and the second driving part is suitable for being abutted against the rocker arm in the process of re-buckling the circuit breaker.

In the above technical scheme, the reset rod is integrally formed on the side of the jump buckle.

The leakage circuit breaker comprises a base, an operating mechanism and an electromagnetic release, wherein the operating mechanism and the electromagnetic release are arranged on the base, the electromagnetic release is arranged on one side of the operating mechanism, and the electromagnetic release is the electromagnetic release.

The invention has the positive effects that: the electromagnetic release is provided with the tripping action mechanism with a reasonable structure, the tripping action mechanism has an action amplification function through the application of a plurality of lever structures, can convert and output smaller tripping force and tripping travel output by an electromagnetic device into larger tripping force and tripping travel, namely, relatively smaller tripping current can meet tripping requirements, the electromagnetic release is ensured to act stably and reliably, and the tripping action can be completed by relatively smaller tripping current, so that a current transformer in the circuit breaker only needs one lead to pass and does not need the lead to wind the current transformer, the possibility of damage generated when the lead is wound is reduced as much as possible, and the safety is improved; when the electromagnetic release works, when leakage current is generated, magnetic field acting force generated by an electromagnetic device overcomes acting force of magnetic steel on an armature to drive the armature to move, and further drives a push rod to move outwards a shell and trigger a tripping action mechanism to trip a circuit breaker, the specific working process of the tripping action mechanism is that the push rod pushes outwards a driving arm of a lock catch to enable the lock catch to rotate around a first connecting shaft in a small range under the action of the elastic force of an elastic piece A, so that a catch table on a locking arm releases the restraint on a buckling part on a jump catch, the jump catch rotates around a second connecting shaft in the direction away from the lock catch under the action of an elastic piece B and drives a linkage rod to move, and further drives a tripping rod on the circuit breaker to act through a trigger rod to realize the tripping of the circuit breaker, when the circuit breaker is re-buckled, an operating mechanism acts and applies thrust to a reset rod through a rocker arm to further drive the jump catch to rotate towards the lock catch direction and apply acting, and the buckling part on the jump buckle is matched with the buckle again to realize the reset of the electromagnetic release.

Drawings

Fig. 1 is a front view of an electromagnetic release in example 1;

FIG. 2 is a perspective view of the electromagnetic trip of FIG. 1;

FIG. 3 is a sectional view of the electromagnetic release (the locking buckle is not engaged with the release buckle) in embodiment 1;

FIG. 4 is a sectional view of an electromagnetic release (engagement of a lock and a jumper) in embodiment 1;

FIG. 5 is a schematic view of the latch of the present invention;

FIG. 6 is a schematic structural view of the linkage rod and the jump buckle in the embodiment 1;

FIG. 7 is a schematic view showing the structure of a linkage rod according to embodiment 1;

FIG. 8 is a schematic structural view of a case in embodiment 1;

FIG. 9 is a schematic structural view of an electromagnetic release in embodiment 2;

fig. 10 is a schematic structural view of the jump buckle in embodiment 2;

fig. 11 is a schematic structural view of the earth leakage breaker.

The reference symbols shown in the figures are: 01-an electromagnetic release; 1-a shell; 2-an electromagnetic device; 3-an installation part; 31-a limiting groove; 4-a top rod; 5-an armature; 6, locking and buckling; 61-a locking arm; 62-a drive arm; 63-buckling the table; 7-elastic member a; 8-jump buckle; 80-a fastening part; 81-limiting boss; 9-elastic member B; 10-a linkage bar; 101-a trigger lever; 102-a strip-shaped hole; 11-a first connecting shaft; 12-a second connecting shaft; 13-a connecting rod; 14-magnetic steel; 15-a reset lever; 151-first drive section; 152-a second drive; 16-a limiting shaft; 17-a baffle table; 18-a third connecting shaft; 19-connecting holes; 20-a base; 21-an operating mechanism; 22-rocker arm.

Detailed Description

The specific structure of the electromagnetic release of the present invention is described below with reference to the drawings of the specification:

example 1 electromagnetic trip

An electromagnetic release, as shown in fig. 1 to 8, comprises a housing 1, an electromagnetic device 2 and a release trigger mechanism; the electromagnetic device 2 is arranged in the shell 1, an installation part 3 is arranged at one side end of the shell 1, the tripping trigger mechanism is installed on the installation part 3, a through hole is formed in the shell wall of one side, facing the installation part 3, of the shell 1, a push rod 4 is movably arranged in the through hole, and the inner end of the push rod 4 abuts against an armature 5 of the electromagnetic device 2; the tripping trigger mechanism comprises a lock catch 6, an elastic piece A7, a jump buckle 8, an elastic piece B9, a linkage rod 10 and a reset rod 15; the lock catch 6 is rotatably mounted on the upper portion of the mounting portion 3 through a first connecting shaft 11, and includes a lock arm 61 and a driving arm 62, in this embodiment, the lock arm 61 and the driving arm 62 are connected to form a 7-shaped structure, a catch platform 63 is disposed on the lock arm 61, the driving arm 62 abuts against the outer end of the top rod 4, the elastic member a7 provides an elastic force for the lock catch 6 to have a tendency of making the driving arm 62 abut against the outer end of the top rod 4, the jump buckle 8 is rotatably connected to the housing 1 through a second connecting shaft 12, the upper end of the jump buckle 8 has a buckling portion 80 adapted to buckle with the catch platform 63, the elastic member B9 provides an elastic force for the jump buckle 8 to have a tendency of making the driving arm 8 rotate in a direction away from the catch 6, and the linkage rod 10 is movably mounted on the side portion of the housing 1, the linkage rod 10 is provided with a trigger rod 101 for driving a tripping rod of the circuit breaker to trip; the reset rod 15 is suitable for driving the trip buckle 8 to rotate and reset towards the direction of the lock catch 6 by a rocker arm 22 of a circuit breaker operating mechanism when the circuit breaker is buckled again. The electromagnetic release of this embodiment is provided with a trip mechanism with a reasonable structure, the trip mechanism has an action amplification function through the application of a plurality of lever structures, and can convert and output smaller trip force and trip stroke output by an electromagnetic device into larger trip force and trip stroke, namely, relatively smaller trip current can meet the tripping requirement, so that the electromagnetic release is stable and reliable in action, and the tripping action can be completed by relatively smaller trip current, therefore, a current transformer in the circuit breaker only needs one lead to pass and does not need the lead to wind the current transformer, the possibility of damage generated when the lead is wound is reduced as much as possible, and the safety is improved.

Referring to fig. 7 and 8, in this embodiment, a limiting shaft 16 is disposed on a lateral portion of the housing 1, a blocking platform 17 is disposed at an end portion of the limiting shaft 16, a strip-shaped hole 102 is disposed on the linkage rod 10, the strip-shaped hole 102 is matched with the limiting shaft 16, a width of the strip-shaped hole 102 is smaller than a diameter of the blocking platform 17, a guiding and limiting effect is achieved for movement of the linkage rod 10 through matching of the limiting shaft 16 and the strip-shaped hole 102, and the linkage rod 10 can be prevented from falling off through the blocking and limiting effect of the blocking platform 17.

In this embodiment, the mounting portion 3 is provided with a limiting structure for limiting the rotation range of the jump buckle 8; still further, limit structure including the shaping in spacing groove 31 on the installation department 3 with the shaping in jump detain spacing boss 81 on 8, spacing boss 81 is in spacing groove 31, jump detain 8 wind when third connecting axle 18 rotates spacing boss 81 is in move in the spacing groove 31, can play the limiting displacement to jumping the home range of detaining 8 through spacing boss 81 and spacing groove 31's cooperation.

One of the jump buckle 8 and the linkage rod 10 is provided with a connecting hole 19, the other is provided with a connecting rod 13, and the connecting rod 13 is matched with the connecting hole 19 to form a linkage connecting structure.

In this embodiment, the elastic element a7 adopts a torsion spring, and the sleeving part of the torsion spring is sleeved on the installation shaft (not shown in the figure) on the installation part 3 during installation, one elastic arm is abutted on the driving arm of the lock catch 6, the other elastic arm is abutted on the installation part, the elastic element B9 adopts a tension spring, one end of the tension spring is hooked on the jump buckle 8, and the other end is hooked on the installation part, and the elastic element a7 and the elastic element B9 can also adopt other elastic components capable of realizing corresponding functions in actual operation.

In this embodiment, magnet steel 14 among electromagnetic device 2 is the alnico material, and alnico is material that magnetism is adjustable, can adjust alnico material magnetism size with equipment according to the product requirement in the in-service use to satisfy the surplus action current requirement of various specifications. The structure of the electromagnetic device 2 used in this embodiment is the prior art, and is not described in detail in this embodiment.

When the electromagnetic release in this embodiment works, when a leakage current is generated, the electromagnetic device generates a magnetic field acting force to overcome the acting force of the magnetic steel on the armature and drive the armature 5 to move, so as to drive the ejector rod to move outwards towards the shell and trigger the tripping mechanism, so as to trip the circuit breaker, the specific working process of the tripping mechanism is that the ejector rod 4 pushes the driving arm 62 of the latch 6 outwards, so that the latch 6 rotates around the first connecting shaft 11 for a small extent around the first connecting shaft against the elastic force of the elastic member a, so that the latch table 63 on the locking arm 61 releases the constraint on the latch part 80 on the latch 8, the latch 8 rotates around the second connecting shaft 12 towards the direction far away from the latch 6 under the action of the elastic member B9 and drives the linkage rod 10 to move, and further drives the tripping rod on the circuit breaker to act through the trigger rod 101, so as to trip the circuit breaker, and the latch 6 resets under the reset elastic force of the elastic member a7 after the circuit breaker, and the ejector rod 4 is pushed to move inwards to drive the armature 5 to reset, when the circuit breaker is switched on, the operating mechanism acts on the second driving part 152 through the rocker arm to drive the reset rod 15 to rotate around the third connecting shaft 18, and when the reset rod 15 rotates, the trip buckle 8 is pushed to rotate towards the direction of the lock catch 6 through the first driving part 151 until the buckling part 80 on the trip buckle 8 is matched with the lock catch 6 again, so that the resetting of the electromagnetic trip device is realized.

Example 2 electromagnetic trip

Referring to fig. 9 and 10, this embodiment has substantially the same structure as that of embodiment 1, except that the reset lever 15 is integrally formed at the side of the trip 8, and with this structure, compared with embodiment 1, the electromagnetic trip in this embodiment has one less component, which is advantageous for assembly, and is installed in the electrical leakage breaker, and when the operating mechanism is tripped, the rocker arm 22 of the operating mechanism directly acts on the reset lever 15 to push the reset lever 15 to operate synchronously with the trip 8.

Embodiment 3 residual current circuit breaker

Referring to fig. 11, the electrical leakage breaker of the present embodiment includes a base 20, an operating mechanism 21 disposed on the base 20, and an electromagnetic trip 01, wherein the electromagnetic trip 01 is mounted on one side of the operating mechanism 21, and the electromagnetic trip 01 is the electromagnetic trip described in embodiment 1 or embodiment 2.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious changes and modifications which fall within the spirit of the invention are deemed to be covered by the present invention.

Claims

1. An electromagnetic release comprises a shell (1), an electromagnetic device (2) and a release trigger mechanism; the electromagnetic device (2) is arranged in the shell (1), an installation part (3) is arranged at one side end of the shell (1), the tripping trigger mechanism is installed on the installation part (3), a through hole is formed in the shell wall of one side, facing the installation part (3), of the shell (1), a push rod (4) is movably arranged in the through hole, and the inner end of the push rod (4) abuts against an armature (5) of the electromagnetic device (2); the tripping device is characterized in that the tripping trigger mechanism comprises a lock catch (6), an elastic piece A (7), a jump buckle (8), an elastic piece B (9), a linkage rod (10) and a reset rod (15); the lock catch (6) is rotatably mounted on the upper portion of the mounting portion (3) through a first connecting shaft (11) and comprises a locking arm (61) and a driving arm (62), a buckling platform (63) is arranged on the locking arm (61), the driving arm (62) abuts against the outer end of the ejector rod (4), an elastic part A (7) enables the driving arm (62) to be in abutting contact with the outer end of the ejector rod (4) under the action of elastic force provided by the lock catch (6), the jump buckle (8) is rotatably connected with the shell (1) through a second connecting shaft (12), a buckling portion (80) suitable for being buckled with the buckling platform (63) is arranged at the upper end of the jump buckle (8), and the elastic part B (9) enables the driving arm (8) to be kept in a direction rotating away from the lock catch (6) under the action of elastic force provided by the jump buckle (8), the linkage rod (10) is movably arranged on the side part of the shell (1) and is linked with the jump buckle (8), and a trigger rod (101) for driving a tripping rod of the circuit breaker to trip is arranged on the linkage rod (10); the reset rod (15) is suitable for being driven by a rocker arm (22) of a circuit breaker operating mechanism when the circuit breaker is buckled again to drive the jump buckle (8) to rotate and reset towards the direction of the lock catch (6).

2. The electromagnetic release according to claim 1, characterized in that a limiting shaft (16) is arranged at the side of the housing (1), a stop (17) is arranged at the end of the limiting shaft (16), a strip-shaped hole (102) is arranged on the linkage rod (10), the strip-shaped hole (102) is matched with the limiting shaft (16), and the width of the strip-shaped hole (102) is smaller than the diameter of the stop (17).

3. An electromagnetic release according to claim 1, wherein the mounting portion (3) is provided with a limit formation which limits the range of rotation of the jump buckle (8).

4. The electromagnetic release according to claim 3, wherein the limiting structure comprises a limiting groove (31) formed on the mounting portion (3) and a limiting boss (81) formed on the jump buckle (8), the limiting boss (81) is located in the limiting groove (31), and the limiting boss (81) moves in the limiting groove (31) when the jump buckle (8) rotates around the third connecting shaft (18).

5. The electromagnetic release according to claim 1, characterized in that one of the jump buckle (8) and the linkage rod (10) is provided with a connecting hole (19), and the other is provided with a connecting rod (13), and the connecting rod (13) is matched with the connecting hole (19) to form a linkage connecting structure.

6. The electromagnetic release according to any of claims 1 to 5, characterized in that the elastic member A (7) is a torsion spring and the elastic member B (9) is a tension spring.

7. Electromagnetic trip according to any of the claims 1 to 5, characterized in that the magnetic steel (14) in the electromagnetic device (2) is of alnico.

8. The electromagnetic trip according to any one of claims 1 to 5, characterized in that said reset lever (15) is rotatably mounted on a side of said housing (1) by means of a third connecting shaft (18), said reset lever (15) having a first drive portion (151) and a second drive portion (152), said first drive portion (151) being on a side of said jumper (8) facing away from said latch (6), said second drive portion (152) being adapted to abut against said rocker arm (22) during a breaker re-trip.

9. Electromagnetic release according to any of claims 1 to 5, characterized in that the return lever (15) is integrally formed on the outer side of the jump buckle (8).

10. An earth leakage circuit breaker comprising a base (20), an operating mechanism (21) provided on the base (20), and an electromagnetic trip (01), the electromagnetic trip (01) being mounted on one side of the operating mechanism (21), characterized in that the electromagnetic trip (01) is the electromagnetic trip according to any one of claims 1 to 9.