CN202076201U

CN202076201U - Electromagnetic tripping mechanism of circuit breaker

Info

Publication number: CN202076201U
Application number: CN2011201591547U
Authority: CN
Inventors: 张洵初; 陈玉兵; 陈志刚; 王炯华; 管瑞良
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2011-05-18
Filing date: 2011-05-18
Publication date: 2011-12-14
Anticipated expiration: 2021-05-18

Abstract

The utility model provides an electromagnetic tripping mechanism of a circuit breaker, and belongs to the technical field of low-voltage apparatus. The electromagnetic tripping mechanism comprises an armature iron, a bracket, a magnetic yoke and a spring, wherein a brake bar extends from one side of the top of the armature iron; the bracket is provided with a first side wall and a second side wall; the magnetic yoke is arranged between the armature iron and the bracket; one end of the spring is fixed with the brake bar, and the other end is fixed with the bracket; a first pivoting lug is arranged at upper part on one side of the armature iron in an extending manner, and a second pivoting lug is arranged on the other side of the armature iron in an extending manner; a limiting lug is arranged below the first pivoting lug or the second pivoting lug in an extending manner; a first open slot is formed at the upper part of the first side wall, and a second open slot is formed at the upper part of the second side wall; the first pivoting lug is matched with the first open slot, and the second pivoting lug is matched with the second open slot; and a raised face protrudes from the first side wall and is used for limiting the maximal distance between the armature iron and the magnetic yoke. The electromagnetic tripping mechanism is characterized in that a clamp pin which is used for preventing the swaying of the armature iron is arranged at the tail end of the first pivoting lug forms, and has the advantages that the clamp pin plays a role of preventing the sway of the armature iron, so as to guarantee the precision in detection.

Description

The electromagnetic trip mechanism of circuit breaker

Technical field

The utility model belongs to the low voltage electrical apparatus technology field, is specifically related to a kind of electromagnetic trip mechanism of circuit breaker, is used to handle circuit breaker trip.

Background technology

China utility model patent Granted publication CN2924776Y discloses a kind of electromagnetic trip mechanism that improves the circuit breaker of structure, specifically by shown in Figure 5, a side that is included in the top extends the armature 1 of an actuator lever 11, the support 4 that matches with armature 1 with the first side wall 41 and second sidewall 42, be arranged at the spring 3 that the fixing and other end of yoke 2 between armature 1 and the support 4 and one one end and actuator lever 11 and support 4 are fixed, the technical essential of this patent scheme be a side of armature 1 and on the upper side portion extended one first pivot lug 14, opposite side has extended a position and the first pivot lug, the 14 corresponding second pivot lugs 12, and below corresponding to the first pivot lug 14 or the second pivot lug 12, extended a spacing lug 13, the top of the first side wall 41 of support 4 offers one first open slot 411, and the top of second sidewall 42 offers one second open slot 421, the first pivot lug 14 matches with first open slot 411, and the second pivot lug 12 matches with second open slot 421.The electromagnetic trip mechanism of this structure, because first, second sidewall the 41, the 42nd of support 4 constitutes through bending technique, therefore the distance between first,

second sidewall

41,42 is difficult to accurate control, thereby make the external diameter of armature 1 and the distance between first,

second sidewall

41,42 be difficult to reach the ideal matching effect, also be in other words, gap in certain range between the external diameter of armature 1 and the support 4 changes, and the variation in this gap can influence the operate as normal of electromagnetic trip mechanism.Because, the electrodynamic influence that electromagnetic trip mechanism is brought by electric current when work, the double swerve phenomenon can appear in armature 1, influences the accuracy of detection of release.Simultaneously, the rotary spacing of armature 1 is to ensure by the spacing convex surface 412 on the first side wall 41 that is formed in support 4, in order to get so that armature 1 is successfully packed into support 4, the height of spacing convex surface 412 or title protrusion degree must be (the having maximum limit) that is restricted, often have the anxiety that causes spacing convex surface 412 to perform practically no function so the gap between first,

second sidewall

41,42 of aforesaid armature 1 and support 4 changes, promptly the gap between first,

second sidewall

41,42 of armature 1 and support 4 can cause crossing convex surface 412 in armature 1 swing.Therefore, how satisfy armature 1 and convex surface 412 adaptive and avoid armature 1 to rock guaranteeing accuracy of detection, be a technical problem of puzzlement industry all the time.This applicant has been made good try, and technical scheme described below produces under this background.

Summary of the invention

Task of the present utility model is to provide a kind of armature that helps avoid to rock and use the assurance accuracy of detection.

Task of the present utility model is finished like this, a kind of electromagnetic trip mechanism of circuit breaker, a side that is included in the top is extended with the armature of an actuator lever, that matches with armature has the first side wall and second sidewall and first, the support that second sidewall corresponds to each other, being arranged at yoke between armature and the support and one one end and actuator lever fixes and the fixing spring of the other end and support, one side of described armature and on the upper side portion extended one first pivot lug, opposite side has extended a position and the corresponding second pivot lug of the first pivot lug, and below corresponding to the first pivot lug or the second pivot lug, extended a spacing lug, the top of described the first side wall offers one first open slot, the top of described second sidewall offers one second open slot, the described first pivot lug matches with first open slot, and the described second pivot lug matches with second open slot, convex with a convex surface that is used to limit the ultimate range between armature and the described yoke on the described the first side wall, be characterised in that: the end of the described first pivot lug constitutes and is used to the card base that stops that described armature rocks.

Card base described in the utility model constitutes in the end bending of the described first pivot lug.

Constitute the support fit between second pivot lug described in the utility model and the spacing lug, described second sidewall has a support hook, and described second open slot is formed on the support hook, and this support hook matches with described support fit.

Spacing lug described in the utility model constitutes the inclined plane towards a side surface of the described second pivot lug.

The utility model is owing to constitute card base at the end of the first pivot lug, thereby plays the effect that prevents that armature from rocking by card base, guarantees the precision that detects.

Description of drawings

Fig. 1 is example structure figure of the present utility model.

Fig. 2 is the first example structure figure of armature of the present utility model.

Fig. 3 is the second example structure figure of armature of the present utility model.

Fig. 4 is the structure chart of support of the present utility model.

Fig. 5 is the structure chart of the electromagnetic trip mechanism of the circuit breaker in the prior art.

Embodiment

Embodiment 1:

Ask for an interview Fig. 1, Fig. 2 and Fig. 4, the technical scheme that the utility model provides is rocked on support 4 and is produced for fear of armature 1.By illustrated in figures 1 and 2, armature 1 is plates, this armature 1 is extended with an actuator lever 11 towards a side (location status with current icon is an example) of a last end, and on actuator lever 11, be formed with one group of recessed road 111 of adjusting that is used for the position of regulating spring 3, and the side at armature 1 is that illustrated left side is extended with one first pivot lug 14 with level, and being illustrated right side, opposite side is extended with one second pivot lug 12 with level equally, the position of this second pivot lug 12 is and the first pivot lug 14 corresponding (also can claim symmetry), below the second pivot lug 12, be extended with a spacing lug 13, constitute support fit 15 by the spacing between the second pivot lug 12 and the spacing lug 13.Preferred scheme is that spacing lug 13 is constituted inclined plane 131 towards the surface of a side of the second pivot lug 12, constitutes a card base 141 at the end of the aforesaid first pivot lug 14 with bending state.Because when installation and removal armature 1, need to be formed on the card base 141 on the first pivot lug 14 of armature 1 and carry, in this process owing to be across second open slot about in the of 421 after 13 combinations of the second pivot lug 12 and spacing lug, this moment, armature 1 meeting was rotated around second open slot 421, and the existence on inclined plane 131 makes rotates more freely.

By Fig. 1 and shown in Figure 4, support 4 matches with aforesaid armature 1, this support 4 is used to surround by yoke shown in Figure 12, top at the first side wall 41 of support 4 has one first open slot 411, and has one second open slot 421 on the top of second sidewall 42 of support 4, first, second open slot 411,421 corresponds to each other, the aforesaid first pivot lug 14 is embedded in first open slot 411, and the aforesaid second pivot lug 12 is embedded in second open slot 421, thereby realizes cooperating of armature 1 and support.By shown in Figure 4, on second sidewall 42, constitute a support hook 422, aforesaid second open slot 421 forms on the support hook 422, and the wall thickness at the bottom of the hook of the width of aforesaid support fit 15 and support hook 422 adapts.When the support hook 422 of circle hook shape with after second open slot 421 matches, all has certain width upper and lower, forward and backward, spacing lug 13 is positioned at the peripheral of support hook 422 and matches with the second pivot lug 12, makes armature 1 can not break away from support 4 on above-below direction.Simultaneously, because the end of the first pivot lug 14 of armature 1 also constitutes card base 141, card base 141 is corresponding with the side 16 of armature 1, first open slot 411 that cause matches with it is the thickness of the material of support 4 at the width of left and right directions just, therefore the varied in thickness scope is very little, thereby can prevent the rocking of left and right directions of armature 1 effectively, guarantee the electromagnetic trip mechanism operate as normal of circuit breaker.The yoke 2 formation closed magnet circuit that matches with armature 1, that is, when electric current in the circuit surpassed the threshold values of electromagnetic trip mechanism, armature 1 was fitted around first,

second pivot lug

14,12 rotations and with yoke 2, to constitute closed magnet circuit.

Spring 3 is extension spring, and an end is fixed on the recessed road 111 of adjusting on the actuator lever 11, and the other end is fixed on the spring fixed hole 43 default on the support 4, and after big current vanishes, armature 1 can return to scolds open position, promptly away from the position of yoke 2.

Then as shown in Figure 1 and Figure 4, also being provided with the convex surface 412(Fig. 1 that is used to limit armature 1 hunting range on the first side wall 41 of support 4 shows), because the existence of this convex surface 412, bring certain difficulty to installation, therefore in order to optimize structure, satisfied installation requirement easily, then relieve by the support fit 15l that is formed between the second pivot lug 12 and the spacing lug 13, that is to say, because the existence of support fit 15, make armature 1 at card base 141 not in the fixed armature 1, can be with respect to support 4 move left and right.Be specially: when the above-mentioned armature 1 of dismounting, to carry on the card base 141 earlier, the support end that cooperates on card base 141 and the support 4 is broken away from, and simultaneously, armature 1 moves to right, make the inboard of the top arrival support 4 of card base 141, lateral rotation armature 1 again, so that make armature 1 walk around convex surface 412, until making armature 1 rotate to the outside of convex surface 412, again armature 1 is moved to the left, makes the second pivot lug 12 and spacing lug 13 break away from second sidewall 42.Being about to armature 1 after finishing above-mentioned steps breaks away from from electromagnetic trip mechanism.In the time will armature 1 being installed, so as long as according to aforesaid reverse order operation.

Embodiment 2:

Ask for an interview Fig. 3, the bending form of card base 141 on the first pivot lug 14 changed, say that more properly card base 141 done about 90 ° variation with respect to embodiment 1 in the wrap direction on the first pivot lug 14, thereby the contact-making surface between the outer wall of the first side wall 41 of card base 141 and support 4 is increased, to stoping rocking of armature 1 to have better effect, all the other are all with the description to embodiment 1.

Claims

1. the electromagnetic trip mechanism of a circuit breaker, a side that is included in the top extends the armature (1) of an actuator lever (11), that matches with armature (1) has the first side wall (41) and second sidewall (42) and first, second sidewall (41,42) support that corresponds to each other (4), be arranged at yoke (2) and one one end between armature (1) and the support (4) and actuator lever (11) is fixing and spring (3) that the other end and support (4) are fixed, one side of described armature (1) and on the upper side portion extended one first pivot lug (14), opposite side is extended with a position and the corresponding second pivot lug (12) of the first pivot lug (14), and extended a spacing lug (13) in below corresponding to the first pivot lug (14) or the second pivot lug (12), the top of described the first side wall (41) offers one first open slot (411), the top of described second sidewall (42) offers one second open slot (421), the described first pivot lug (14) matches with first open slot (411), and the described second pivot lug (12) matches with second open slot (421), convex with a convex surface (412) that is used to limit the ultimate range between armature (1) and the described yoke (2) on the described the first side wall (41), it is characterized in that: the end of the described first pivot lug (14) constitutes and is used to the card base (141) that stops that described armature (1) rocks.

2. the electromagnetic trip mechanism of circuit breaker according to claim 1 is characterized in that described card base (141) constitutes in the end bending of the described first pivot lug (14).

3. the electromagnetic trip mechanism of circuit breaker according to claim 1, it is characterized in that constituting support fit (15) between described second pivot lug (12) and the spacing lug (13), described second sidewall (42) has a support hook (422), described second open slot (421) is formed on the support hook (422), and this support hook (422) matches with described support fit (15).

4. according to the electromagnetic trip mechanism of claim 1 or 3 described circuit breakers, it is characterized in that described spacing lug (13) constitutes inclined plane (131) towards a side surface of the described second pivot lug (12).