CN1142119A

CN1142119A - Device for regulating thermo-cut-out mechanism of circuit breaker

Info

Publication number: CN1142119A
Application number: CN96110396.5A
Authority: CN
Inventors: 贾维尔·赫雷罗斯
Original assignee: Schneider Electric SE
Current assignee: Schneider Electric SE
Priority date: 1995-06-19
Filing date: 1996-06-19
Publication date: 1997-02-05
Anticipated expiration: 2016-06-19
Also published as: EP0760524B1; FR2735614A1; FR2735614B1; TW371771B; HUP9601552A3; CN1066846C; DE69618873D1; TR199600518A2; HUP9601552A2; EP0760524A1; TNSN96086A1; HU9601552D0

Abstract

Disclosed is a device to regulate the thermal disconnection mechanism or the bimetallic strip of a circuit breaker. The device comprises a bracket and a recovery device. One end of the bracket is connected to the bottom of the bimetallic strip and the other end is hinged at a fixed pivot; an adjusting bolt can be adjusted at the outside and presses the bottom of the bimetallic strip and the bottom of the bracket at the area connecting the bracket; the bracket is installed at the original position deflecting from the bimetallic strip. The device can be used to adjust effectively and the structure is more compact.

Description

Be used to adjust the device of thermo-cut-out mechanism of circuit breaker

The present invention relates to a kind of device of adjusting thermo-cut-out mechanism of circuit breaker or bimetal leaf, it has an adjustment bolt that acts on this release mechanism bottom.

In known method, the adjusting device of this type contains one and directly acts on the adjustment bolt that can make bi-metal plate deformed on the bimetal leaf bottom, so that adjust the position that is connected to the hot slide block on the bimetal leaf, this bolt also can be opened movable contact under overheated situation.This is adjusted at factory and carries out, and can limit the disconnection critical point of circuit breaker.

In the present embodiment, the effect of bolt is exactly to want directly to apply power on the bottom of the bimetal leaf with symmetrical assembly structure, separates under the state of coincideing to prevent bimetal leaf.In addition, the welding of the electric continuum on the circuit breaker branch road fixedly the bimetal leaf base also some problems can appear.

The objective of the invention is to propose an above-mentioned adjusting device, it can adjust circuit breaker effectively in factory, and makes assembly structure compact more, with the deficiency of the adjusting device that overcomes existing structure.

For finishing above-mentioned purpose, this device comprises:

A support, the one end is connected to the bottom of bimetal leaf, and the other end then is hinged on the fixed pivot, adjusts bolt and can regulate from the outside, tightly suppresses the bottom of support and the bottom of bimetal leaf in the zone that connects support;

Recovery device is installed to the initial position that departs from bimetal leaf by described support, and this initial position is corresponding to the released position of adjusting bolt.

According to a preferred embodiment, adjusting device is installed in the same side of circuit breaker axis, and this is asymmetric relatively.

Describe a preferred embodiment below with reference to accompanying drawings in detail.

Fig. 1 is the circuit breaker partial view that apparatus of the present invention are installed;

Fig. 2 is that device shown in Figure 1 is in the fragmentary axial cross-section of adjusting under the bolt releasing orientation;

Fig. 3 and Fig. 2 are similar, for adjusting the view of bolt under tight condition;

The same Fig. 2 of Fig. 4, Fig. 5, Fig. 3 are similar, but show another structure, have especially wherein considered electric wire connecting junction contact terminal;

Fig. 6 is the cross section view of expression along the M-M1 line of Fig. 4, circuit breaker shown in Figure 5;

Fig. 7 shows another embodiment of the present invention.

With reference to Fig. 1, Fig. 2 and Fig. 3, shown in circuit breaker comprise a housing 11, it is assembled by the critical piece of knowing.In these parts, illustrated hot slide block 12 is used for driving the disconnection pull bar under overheat condition, and this disconnects pull bar (not shown) can make a small rod that keeps plate to be connected to movable contact disconnect, and that is to say the mechanical connection between fracturing connecting rods and the plate.The mechanical connection of connecting rod and plate can make movable contact open, and plate is by a tensioned.

Hot slide block 12 is connected on the thermal cutoff unit of bimetal leaf 13, applies slight power on hot slide block, with the method for mold pressing hoof (moulded shoe) it is contained in an end of bimetal leaf.

Can see other common components among the figure below, a braid over braid 15 is connected on the bimetal leaf 13 by braid over braid support 16, and an arc angle shape horn 17 and a shunt 18 are connected on the liner 19, and a device 20 is used to adjust the thermal cutoff unit.

Main purpose of the present invention just provides a kind of adjusting device.One end of bimetal leaf 13 is connecting hot slide block 12, that is to say, the bottom of bimetal leaf is connected on the shaft-like flexibility or rigidity support 21 securely, and the free end of support 21 is hinged on the fixed rotating shaft 22.In actual applications, this rotating shaft is formed by the projection institute of a suitable shape, mold pressing or be connected on the housing, and the free end that is hinged in the rotating shaft has a fork 23 that has two branches to be engaged on each protruding side.One adjusts the correct position that bolt is positioned at housing, is easy to from the outside regulate, and this bolt makes flexibility paste mutually with the base and the bimetal leaf 13 of rigid support 21.

The factory that is adjusted at of bimetal leaf carries out, and has determined the disconnection critical point of circuit breaker.When support 21 when being flexible, it is one to have the device of enough recovery characteristics, can depart from the corresponding initial position in released position that bimetal leaf returned to and adjusted bolt 24.When support 21 is rigidity, need recovery spring additional shown in Figure 7 thereon to finish above-mentioned functions.

In Fig. 2, Fig. 3, a fixing defeated spool 25 links to each other with connection gasket 19.In Fig. 3, adjusting bolt 24 is tight condition, and it moves along the direction of arrow A indication.In this tight condition, because support 21 rotates towards the arrow C direction around rotating shaft 22, hot slide block 12 is motion in the direction of arrow C also.

Unclamp if adjust bolt, above-mentioned recovery device resets bimetal leaf.

Fig. 4 and Fig. 5 show another embodiment, and wherein Gu Ding defeated spool is by movably defeated spool 30 replacements, and it comprises a screw rod 33 that 31, one 32, one of underlays that are connected on the shunt 18 of pad are used for fastening cable of going up that is connected on the arc-shaped electrode arm 17.Pad bears the power that produces in the wiring on the steel, and copper underlay guarantees that then bimetal leaf 13 passes through continuous current.

As before, the thermo-cut-out mechanism adjusting device comprises 13, one support 21 and adjustment bolts 24 that rotate around fixed rotating shaft 22 of a bimetal leaf.Fig. 4 represents the releasing orientation of bolt, and Fig. 5 represents the tight condition of bolt.There is shown the diverse location of hot slide block.

Fig. 6 represents the drawing in side sectional elevation of the circuit breaker cut open along Fig. 2, Fig. 3 line M-M1.The axis X of circuit breaker 10 is by the axis of defeated spool 25.On the other hand, the bimetal leaf of expanded configuration has been laid the eccentric structure of being made up of some parts relatively.Particularly, the yoke 40 of H shape is asymmetric.The movable contact that holds in the magnet H opening is eccentric, is fixed at the locational disconnection case of movable contact.This special construction can make all parts all concentrate in the smaller relatively housing of volume, and particularly, the release mechanism adjusting device is placed in a side of the axis of Shell of circuit breaker asymmetricly.

Fig. 7 shows a specific embodiment of circuit breaker 10.Support 21 is rigidity, and it comprises one first end 51, circular arc of its coiled or a full circle, the folding carriage that enters of second end.First end of coiled circular arc portion is embedded in the circular cavity that partially opens, and it is rotating shaft with the virtual hinge contact.Second end is used for bimetal leaf is fixed.One recovers spring 54 1 ends is fixed on the support 21, and the other end is fixed on the pin 55, links on the housing guaranteeing.Regulating bolt 24 is pressed on the support 21 and is housed inside in the hole 56 that cross section is hexagonal housing.

One end 51 of support 21 also has some other feature.Rotating shaft on the support can form by additional pin or by the single parts that are molded on housing.

Claims

1, a kind of device that is used to adjust thermo-cut-out mechanism of circuit breaker or bimetal leaf, it comprises that one adjusts bolt, is positioned on the position to the bottom generation effect of release mechanism, it is characterized in that it comprises:

A support (21), the one end is connected to the bottom of bimetal leaf (13), and the other end is hinged on the fixed pivot (22), adjusts bolt and can regulate from the outside, tightly suppress the bottom of support (21) and the bottom of bimetal leaf (13) in the zone that connects support (21)

Recovery device is installed to the initial position that departs from bimetal leaf (13) by described support, and this initial position is corresponding with the released position of adjusting bolt (24).

2, device according to claim 1 is characterized in that, support (21) is a rigidity, and recovery device comprises that is recovered a spring (54), and the one end is connected on the support and the other end is connected on the steady pin, and steady pin is connected on the Shell of circuit breaker securely.

3, device according to claim 1 is characterized in that, support is flexible, and recovery device is formed by support itself.

4, device according to claim 1 is characterized in that, support (21) one ends that are hinged on the fixed pivot are fork shape.

5, device according to claim 4 is characterized in that, described fixed pivot (22) is to form with on the housing that is connected to circuit breaker by mold pressing or additional projection.

6, device according to claim 1 is characterized in that, fixed pivot (22) is to form by an end coiled one circular arc of support (21) and the circular cavity (53) that is embedded in opening.

7, device according to claim 1 is characterized in that, adjusting device is installed in the same side of circuit breaker axis, and is asymmetric with respect to this axis.