CN203071021U

CN203071021U - Leakage tripping device

Info

Publication number: CN203071021U
Application number: CN 201220741925
Authority: CN
Inventors: 陈玉兵; 张洵初; 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: 2012-12-28
Filing date: 2012-12-28
Publication date: 2013-07-17
Anticipated expiration: 2022-12-28

Abstract

The utility model discloses a leakage tripping device, which comprises a rack and a button, a rocker arm, a first push rod and a first lock catch arranged in the rack, wherein two ends of the rocker arm are linked with the button and the first push rod, and the first push rod and the first lock catch form a first buckle which can be disconnected. The leakage tripping device further comprises a magnetic flux converter, a jump pin, a second lock catch, a second push rod and a lever, wherein the magnetic flux converter is used for receiving residual current signals; the jump pin is arranged corresponding to the magnetic flux converter; the second lock catch and the jump pin form a second buckle which can be disconnected; the second push rod is arranged in the rack; and the upper end of the lever is matched with the second push rod in a push-press manner, the lower end of the lever presses against the second lock catch, thereby forming a third buckle which can be disconnected. Compared with the prior art, the leakage tripping device disclosed by the utility model has the beneficial effects that the tripping device adopts a free tripping mechanism, that is, reliable tripping can also be realized under the condition that leakage current exists even if a reset button is pressed artificially.

Description

Leakage tripping device

Technical field

The utility model belongs to the low-voltage electrical apparatus field, particularly a kind of leakage tripping device with the residual current protecting circuit breaker.

Background technology

The leakage tripping device of existing band residual current protecting circuit breaker is shown in patent 03228234.6; advantage with designs simplification and shortening motion transfer route; according to it leakage tripping device is described; be provided with button, rocking arm and push pedal in the frame; link with described button and described push pedal respectively in described rocking arm two ends, described push pedal can horizontal direction be slided in frame, and pushing block is installed on the axle of push pedal; can link with push pedal, realize being coupled with breaker tripping mechanism.Lever is installed in the push pedal, can do gyration around the arc surface of push pedal; Described main force lever is provided with main spring, and main spring acts on the top that active force fulcrum on the lever is positioned at push pedal, and push pedal relies on spring to make it to contact with lever compact.The upper end of lever is subjected to the acting in conjunction of main spring and fixed axis, and the upper end is abutted against on the fixed axis, can rotate around it and slide, and can not move as horizontal direction;

Also comprise: a relay that is used for accepting the residual current signal, described relay is provided with push rod; One with described relay upper push-rod be oppositely arranged release link; A snap close that is oppositely arranged with described release link; A tripping, described tripping and described snap close form the mechanical interlocking that can throw off; Described tripping is provided with short column and reduction torsion spring; Described main force lever upper end abuts against on the fixed axis, and the other end can be in the movement of making certain limit in the afterbody of tripping and the tripping between the set short column; When lever was subjected to the barrier effect of the short column in the tripping, tension main spring, lever were in the carrying position; And after tripping was threaded off, the front end of lever slipped over short column and pushes down tripping again conversely, to overcome spring to the effect of tripping; Restoring lever is equipped with torque spring in advance, and when lever was in unloading position, leverage was in torsion spring, thereby made release link give the relay push rod a suitable reset force.

But there is the high and unreliable phenomenon of threading off of the required triggering energy of relay in above-mentioned patent structure, when button is pinned, if this moment is when just in time having leakage current to exist, after relay is accepted the residual current signalizing activity, its push rod promotes release link, snap close and tripping are threaded off, lever is swing left under the pulling force effect of main spring, depress tripping and drive push pedal, and push pedal this moment is pinned by button, pushing block and push pedal interlock is interaction relation, and pushing block can't drive the tripping mechanism of circuit breaker, can not realize that therefore circuit breaker reliably threads off.

Summary of the invention

The utility model is to overcome the deficiencies in the prior art, and a kind of leakage tripping device is provided, with the reliability that realizes that circuit breaker miniaturization and electric leakage are threaded off.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is:

A kind of leakage tripping device, comprise frame and be arranged on frame interior button, rocking arm, first push rod and first snap close, link with described button and described first push rod respectively in described rocking arm two ends, first push rod and first snap close constitute first hasp that can throw off, and characteristics are: also comprise:

A magnetic flow convertor that is used for accepting the residual current signal;

A tripping that is oppositely arranged with described magnetic flow convertor can be activated by described magnetic flow convertor;

Second snap close, described second snap close and described tripping form second hasp that can throw off;

Second push rod, described second push rod is arranged in the described frame;

One lever, the upper end of described lever cooperates with described second push rod pushing, and its lower end and described second snap close are conflicted, the 3rd hasp that formation can be thrown off; Between the lower end of the upper end of described lever and lever, has connecting portion, this connecting portion and described first push rod are rotatably assorted, on described lever, between top and bottom, be provided with main spring, described lever is when described second snap close and tripping disengagement, and its upper end drives described second push rod and moves horizontally under the main spring effect.

Described first push rod is provided with first hole, described second push rod is provided with second hole, described lever passes described first hole and second hole respectively, and the second connecting portion hub setting of described lever is in described first hole, and the upper end of described lever places in described second hole.

Described second snap close has the stopper section, and described stopper section can stop the slip of the lower end of lever when leakage tripping device is in the close position.

Described stopper section is a ball, and this ball is arranged in the lock buckling groove of offering on described second snap close.

Have arc surface on the connecting portion of described first push rod corresponding to lever, this arc surface pivots with the connecting portion of described lever and cooperates.

Described lever has actuator arm, and described actuator arm can drive first snap close, makes first snap close and first push rod discharge the hasp state.

Described tripping afterbody has the engaging groove, and the described second snap close afterbody is provided with and the engaging boss that engages the groove snap fit.

Be provided with the tripping reduction torsion spring in described tripping, described tripping reduction torsion spring one end is conflicted in tripping, and the other end is conflicted on frame.

Be provided with the snap close reduction torsion spring at described second snap close, described snap close reduction torsion spring one end is conflicted on second snap close, and the other end is conflicted on first snap close.

The utility model all is connected first push rod and second push rod on the lever, and the lower end of lever and described second snap close are conflicted, when magnetic flow convertor detects electric leakage, the lever lower end discharges becomes free end, at this moment, lever has two stress points, one is and being connected or contact point of first push rod, one is and being connected or contact point of second push rod, when first push rod is locked, then lever under the reset response of main spring with first push rod be connected or contact point is that fulcrum rotates, drive the push pedal that is coupled with circuit breaker on second push rod thereby drive the second push rod horizontal movement.

Compared with prior art, the usefulness of the utility model patent is that the mechanism of release adopts free tripping mechanism, even the people also can realize reliable dropout for pinning reset button under the condition that leakage current exists.Because adopt magnetic flux to compare with coil as driving source, required triggering energy is little, be convenient to the miniaturization design of circuit breaker.

Description of drawings

Fig. 1: be exploded perspective view of the present utility model.

Fig. 2: be leakage tripping device structure front view of the present utility model, wherein leakage tripping device is in the close position.

Fig. 3: be leakage tripping device structure front view of the present utility model, wherein leakage tripping device is in trip position.

Fig. 4: be overall structure schematic diagram of the present utility model.

Fig. 5: be internal structure schematic diagram one of the present utility model.

Fig. 6: be internal structure schematic diagram two of the present utility model.

Fig. 7: structural representation one when pinning button for the utility model.

Fig. 8: structural representation two when pinning button for the utility model.

Fig. 9: be the utility model first push rod and the first snap fit schematic diagram.

Figure 10: be the structural representation of the utility model in residual current circuit breaker.

Embodiment

In order to make the public can fully understand technical spirit of the present utility model and beneficial effect; the applicant will describe in detail embodiment of the present utility model below by reference to the accompanying drawings; but the applicant is not restriction to technical scheme to the description of embodiment, anyly makes form but not the variation of essence all should be considered as protection range of the present utility model according to the utility model design.

See also Fig. 1 and in conjunction with Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, shown in Figure 9,

a kind of leakage tripping device, comprise the frame that is formed by two cheeks 1, be provided with button 2 on two cheeks 1 of frame, Rocker arm 5, the first push rod 6, the second push rod 7 and the first snap close 8, described button 2, slide up and down and be supported on described cheek 1, described Rocker arm 5 and described button 2 and the first push rod 6 interlocks, one end of this Rocker arm 5 embeds in the through hole 21 of button 2, the other end embeds in the push rod chute 63 of the first push rod 6, rotate and drive the first push rod 6 by the drive of the operation to button 2 Rocker arm 5 and do the horizontal direction slip on cheek 1, described the first snap close 8 passes through axle 83 hub settings in two cheeks 1, namely be rotatably supported in two cheeks 1, described the first snap close 8 has hook dress section 81, this hook dress section 81 contacts the first hasp that coordinates and the first push rod 6 and the first snap close 8 formations can be thrown off with the buckle hanging unit 62 of the first push rod 6, described the first push rod 6 and the second push rod 7 are slidably supported on described cheek 1, can be in the two interior horizontal motion of doing of cheek 1, push pedal 71 is arranged on the fixed axis 73 of the second push rod 7, can link with the second push rod 7, realize being coupled with breaker tripping mechanism.

Above-mentioned a kind of leakage tripping device also comprises:

A magnetic flow convertor 10 that is used for accepting the residual current signal, described magnetic flow convertor 10 is provided with unshakable in one's determination 101; One with 11, one second snap closes 12 of described unshakable in one's determination 101 trippings that are oppositely arranged, described second snap close 12 forms second hasp that can throw off with tripping 11.One lever 4, the upper end 42 of described lever 4 contact pushing and cooperate with described second push rod 7, and conflict with described second snap close 12 in its lower end 44, the 3rd hasp that formation can be thrown off; Have connecting portion 43 between the lower end 44 of the upper end 42 of described lever 4 and lever, this connecting portion 43 is rotatably assorted with described first push rod 6.

Have the stopper section on described second snap close 12, described stopper section is when leakage tripping device is in the close position, and the lower end 44 of stopper section and lever 4 is inconsistent, can stop the slip of the lower end 44 of lever 4.Roll structure is adopted at second snap close 12 in this stopper section, also can be arranged to boss structure, and preferably adopt roll structure in the stopper section of present embodiment, specifically: ball 121 is contained in the lock buckling groove of offering on second snap close 12 126 by axle 125 rivetings that arrange on second snap close 12, described ball 121 can roll around axle 125 in lock buckling groove 126, advantage is, described ball 121 makes the friction between lever 4 and the stopper section, become rolling friction from sliding friction, the power of reducing friction makes lever 4 and second snap close 12 receive electric leakage signal at leakage tripping device, in the tripping operation process, when lever 4 slipped away second snap close 12, both releases were more reliable.Also be provided with snap close reduction torsion spring 122 on second snap close 12, one end of this snap close reduction torsion spring 122 contacts with first snap close 8, the other end contacts with second snap close 12, be used for resetting of first snap close 8 and second snap close 12, certainly, in other embodiment, snap close reduction torsion spring 122 can act on separately on second snap close 12, a torsion spring is set on first snap close 8 in addition it is resetted; Be provided with main spring 3 at described lever 4, an end of this main spring 3 is connected between the upper end 42 and connecting portion 43 of described lever 4, and the other end is connected on the frame; Described first push rod 6 is provided with first hole 61, described second push rod 7 is provided with second hole 72, described lever 4 passes first hole 61 of first push rod 6, connecting portion 43 hub settings of described lever are in described first hole 61, and insert in second hole 72 of second push rod 7 described lever upper end 42, and conflict with described second snap close 12 in described lever lower end 44, the 3rd hasp that formation can be thrown off, and slide within the specific limits; Described hole 61 upsides have arc surface 611, this arc surface 611 is positioned on described first push rod 6 and corresponding to the connecting portion 43 of lever 4, this arc surface 611 pivots with the connecting portion 43 of described lever 4 and cooperates, the active force that main spring 3 acts on lever 4 makes lever 4 near second hole 72 and arc surface 611, can drive first push rod 6 and second push rod, 7 horizontal motion; Described tripping 11 afterbodys have engaging groove 111, described second snap close, 12 afterbodys are provided with and the engaging boss 123 that engages groove 111 snap fit, this engaging boss 123 is the shaped as frame structure, when magnetic flow convertor 10 receives electric leakage signal, the engaging groove 111 of tripping 11 and second snap close 12 engage boss 123 releases, the engaging boss 123 of second snap close 12 is firmly rotated with the effect that overcomes snap close reduction torsion spring 122 by lower end 44 pushings of lever 4; Tripping reduction torsion spring 112 is installed in the tripping 11, on the axle 113 on these tripping reduction torsion spring 112 sheathed cheeks 1, described tripping reduction torsion spring 112 1 ends are conflicted in tripping 11, the other end is conflicted on cheek 1, when lever 4 withstands unshakable in one's determination 101 end when it is resetted, and tripping 11 also resets under the effect of tripping reduction torsion spring 112 simultaneously.

As shown in figure 10, aforesaid leakage tripping device is positioned at the back level of circuit breaker 9, described circuit breaker 9 has connecting rod 91, the operating mechanism of the actuatable circuit breaker 9 of these connecting rod 91 1 ends, the other end contacts cooperation with the push pedal 71 of described second push rod 7, when the push pedal 71 on second push rod 7 promoted connecting rod 91, described connecting rod 91 sent " disconnection " instruction to circuit breaker 9.

When leakage tripping device is in the close position (shown in Fig. 2 position):

Leakage tripping device is in the close position by pressing the button 2 and realizes, magnetic flow convertor 10 does not discharge 101 o'clock unshakable in one's determination, and the engaging groove 111 of tripping 11 is in the hasp state with the boss 123 that engages of second snap close 12.Lever 4 passes the hole 61 of first push rod 6, insert in the square hole 72 of second push rod 7 upper end 42, and near square hole 72, conflict and be in the hasp state by ball 121 backstops on second snap close 12 in the lower end 44 of lever 4, hook dress portion 81 snap lock of the buckle hanging unit 62 of first push rod 6 and first snap close 8, first push rod 6 is locked on this position motionless, second push rod 7 is also located on the relevant position motionless under the effect of lever 4, this moment, main spring 3 was in the energy storage state, and the push pedal 71 on second push rod 7 does not contact with the connecting rod 91 of circuit breaker 9.

Leakage tripping device tripping operation process (shown in Fig. 2 location status arrive shown in Fig. 3 location status):

When magnetic flow convertor 10 receives electric leakage signal, unshakable in one's determination 101 promote tripping 11 clockwise rotates around axle 114, the afterbody engaging groove 111 of tripping 11 separates with the afterbody engaging boss 123 of second snap close 12, thereby tripping 11 and 12 releases of second snap close, when the axle 124 of second snap close 12 on second snap close 12 rotates counterclockwise, the lower end of lever 4 produces relative slip with the ball 121 of second snap close 12, final and ball 121 disengages, lever 4 rotates counterclockwise for fulcrum at rapid arc surface 611 on the square hole 61 of first push rod 6 under the pulling force effect of main spring 3, the upper end 42 of lever 4 promotes second push rod 7 to left movement simultaneously, when the actuator arm 41 on the lever 4 is stirred the bottom 82 of first snap close 8, first snap close 8 rotates around axle 83 clockwise directions, make the hook dress portion 81 of first snap close 8 and buckle hanging unit 62 releases of first push rod 6, thereby first push rod 6 and second push rod 7 are with lever 4 motion left under main spring 3 effects, lever 4 is contacting with the end of iron core 101 in the motion process left, and it is resetted.The lower end slippage of lever 4 simultaneously is to the left side of ball 121, and the afterbody of tripping 11 engaging groove 111 engages boss 123 hasp again with the afterbody of second snap close 12.Second push rod 7 is in the process of moving to left, and the push pedal 71 on second push rod 7 promotes connecting rod 91, and described connecting rod 91 sends " disconnection " instruction to circuit breaker 9.

What specify is to continue to consult Fig. 2 and Fig. 3 and in conjunction with Fig. 7 and Fig. 8, when pinning button 2, this moment, first push rod 6 was locked by button 2, can not move, 101 promotion trippings 11 unshakable in one's determination clockwise rotate around axle 114 when magnetic flow convertor 10 receives electric leakage signal, thereby tripping 11 and 12 releases of second snap close, second snap close 12 is when axle 124 rotates counterclockwise, thereby lever 4 arc surface 611 on the square hole of first push rod 6 under the pulling force effect of main spring 3 is rotated counterclockwise for fulcrum, the ball 121 of the lower end of lever 4 and second snap close 12 produces and relatively moves, final and ball 121 disengages (as shown in Figure 8), and the upper end 42 of lever 4 rotates counterclockwise along arc surface 611 under main spring 3 effects, thereby promote second push rod 7 to left movement, push pedal on second push rod 7 subsequently 71 promotes connecting rod 91, described connecting rod 91 sends " disconnection " instruction to circuit breaker 9, and first snap close 8 was activated by the actuator arm 41 of lever 4 and departed from snap-in position this moment.And after button 2 unclamps, lever 4 drives first push rod, 6 integral body to left movement, lever 4 is contacting with the end of iron core 101 in the motion process left, and it is resetted, lower end 44 slippages of lever 4 simultaneously are to the left side of ball 121, and the afterbody of tripping 11 engaging groove 111 engages boss 123 hasp again with the afterbody of second snap close 12.

When the trip position of leakage tripping device is got back to make position (shown in Fig. 3 location status arrive shown in Fig. 2 location status), this moment, lever 4 withstood unshakable in one's determination 101 end, tripping 11 clockwise rotates around axle 114 under the effect of reduction torsion spring 112, second snap close 12 axle 124 on second snap close 12 under reduction torsion spring 122 effects rotates counterclockwise, the engaging groove 111 of tripping 11 is in contact condition with the boss 123 that engages of second snap close 12, unshakable in one's determination 101 are in reset mode, leakage tripping device is in energy storage hasp state to be realized by pressing the button 2, thereby press the button 2 and drive the Rocker arm 5 rotation, driving first push rod 6 moves right, be installed in the also swing to the right of pulling force that lever 4 on first push rod 6 overcomes main spring 3, because lever 4 passes the hole 61 of first push rod 6, insert in the square hole 72 of second push rod 7 its upper end, and near square hole 72, and its lower end conflict on second snap close 12 by ball 121 backstops on second snap close 12, therefore the upper end of lever 4 drives second push rod, 7 levels and moves right, along with first push rod 6 and second push rod 7 move right, hook dress portion 81 snap lock of the buckle hanging unit 62 of first push rod 6 and first snap close 8, first push rod 6 is locked on this position motionless, and main spring 3 is in the energy storage state.Second push rod 7 is also located on the relevant position motionless under the effect of lever 4, and the push pedal 71 on second push rod 7 does not contact with the connecting rod 91 of circuit breaker 9.

Claims

1. leakage tripping device, comprise frame and be arranged on frame interior button (2), rocking arm (5), first push rod (6) and first snap close (8), link with described button (2) and described first push rod (6) respectively in described rocking arm (5) two ends, described first push rod (6) constitutes first hasp that can throw off with first snap close (8), it is characterized in that: also comprise:

(10) trippings (11) that are oppositely arranged with described magnetic flow convertor (10) of magnetic flow convertor that are used for accepting the residual current signal can be activated by described magnetic flow convertor (10);

Second snap close (12), described second snap close (12) forms second hasp that can throw off with described tripping (11);

Second push rod (7), described second push rod (7) is arranged in the described frame;

One lever (4), the upper end (42) of described lever (4) cooperates with described second push rod (7) pushing, and its lower end (44) conflict the 3rd hasp that formation can be thrown off with described second snap close (12); Between the lower end (44) of the upper end (42) of described lever (4) and lever (4), has connecting portion (43), this connecting portion (43) is rotatably assorted with described first push rod (6), be provided with main spring (3) at described lever (4), one end of this main spring (3) is connected between the upper end (42) and connecting portion (43) of described lever (4), the other end is connected on the frame, when described lever (4) was thrown off with tripping (11) at described second snap close (12), its upper end (42) drove described second push rod (7) and moves horizontally under main spring (3) effect.

2. a kind of leakage tripping device according to claim 1, it is characterized in that: described first push rod (6) is provided with first hole (61), described second push rod is provided with second hole (72), described lever (4) passes described first hole (61) and second hole (72) respectively, second connecting portion (43) hub setting of described lever (4) is in described first hole (61), and the upper end (42) of described lever (4) places in described second hole (72).

3. a kind of leakage tripping device according to claim 1, it is characterized in that: described second snap close (12) has the stopper section, and described stopper section can stop the slip of the lower end (44) of lever (4) when leakage tripping device is in the close position.

4. a kind of leakage tripping device according to claim 3, it is characterized in that: described stopper section is a ball (121), this ball (121) is arranged in the lock buckling groove of offering on described second snap close (12) (126).

5. a kind of leakage tripping device according to claim 1, it is characterized in that: have arc surface (611) on the connecting portion (43) of described first push rod (6) corresponding to lever (4), this arc surface (611) pivots with the connecting portion (43) of described lever (4) and cooperates.

6. a kind of leakage tripping device according to claim 1, it is characterized in that: described lever (4) has actuator arm (41), described actuator arm (41) drives first snap close (8), makes first snap close (8) and first push rod (6) discharge the hasp state.

7. a kind of leakage tripping device according to claim 1, it is characterized in that: described tripping (11) afterbody has engaging groove (111), and described second snap close (12) afterbody is provided with and the engaging boss (123) that engages groove (111) snap fit.

8. a kind of leakage tripping device according to claim 1, it is characterized in that: described tripping (11) is provided with tripping reduction torsion spring (112), and described tripping reduction torsion spring (112) one ends are conflicted in tripping (11), and the other end is conflicted on frame.

9. a kind of leakage tripping device according to claim 1, it is characterized in that: described second snap close (12) is provided with snap close reduction torsion spring (122), described snap close reduction torsion spring (122) one ends are conflicted on second snap close (12), and the other end is conflicted on first snap close (8).