Background technology
This type of overcurrent relay all is to comprise indispensable assembly and element in a housing for its function, especially be the splicing ear of main current path, splicing ear for one or more auxiliary current paths, main thermo bimetal's part on the main current path, at least one contact position is used for disconnecting or conducting auxiliary current path, a fast moving switching mechanism is used to switch at least one contact and is positioned between two kinds of on off states, an action bars, it was pulled a definite break path when corresponding rotation, can act on the front contact of fast moving switching mechanism by its pivoting end thus, make fast moving switching mechanism be switched like this, also have a slide block device, the bending of main thermo bimetal's part can be delivered to action bars and get on.
The function of this type of overcurrent relay is as follows.On main current path, because the heat that electric current produces, bending can appear in main thermo bimetal's part.When electric current had surpassed the critical value of determining, this bending also can be enough strong, makes the carriage of action bars produce action, makes action bars can cause fast moving switching mechanism to switch.
This type of overcurrent relay is for example open by DE 200 17 173 U1.
In order to make such device can be set to bear different nominal current intensity, this type of device all will set up an organization, itself or act directly on the action bars, perhaps act on the fast moving switching mechanism, wherein the distance on the action bars resting position time is variable between the front contact of the end of action bars and fast moving switching mechanism, and this distance also is identified as the switch distance.When this switch when becoming big, main thermo bimetal's part will need bigger bending, overcomes this switch distance and makes the handle that opens circuit can touch fast moving switching mechanism run-on point and switch.
This type of overcurrent relay also is provided with the auxiliary bimetal piece of temperature.Under the situation that this type of switch is heated, as the rising of ambient temperature, then main thermo bimetal's part just begins bending, has reduced the switch distance.This does not wish to occur, because the switch distance should be irrelevant with ambient temperature as far as possible.In contrast, half all is provided with an auxiliary bimetal piece.Itself is just crooked in variation of ambient temperature, acts on the action bars, has compensated the effect of main thermo bimetal's part like this.When temperature improved, auxiliary bimetal piece can have been compensated because the switch distance that the temperature effect that occurs on main thermo bimetal's part causes reduces thus by the end of compressing dwang on the front contact.Cover adjusting device by auxiliary bimetal piece can make auxiliary bimetal piece be arranged on the position that needs when finishing device manufacturing and get on, and obtains and the suitable compensating effect of expecting that critical current intensity is relevant.
This type of device makes the mechanical adjustment of element become complicated on the whole under the prior art, for interconnective action bars be set, set up an organization, auxiliary bimetal piece, adjusting device and can both carry out smoothly to the adjusting of fast moving switching mechanism, in order to realize the reliability of reproducible and assurance function, it is with high costs that its assembling can become.
The utility model content
Task of the present utility model is to propose a kind of like this overcurrent relay that constitutes with very simple mechanical realization, and it is very easy to assembling.
According to the utility model, the feature that this task is described by independent claims 1 realizes.
The utility model is characterized in that, the arch member that auxiliary bimetal piece links to each other with an auxiliary therewith bimetal piece and being installed in is contained on the rotation pivot rotating action bars and has constituted one and overlap pre-assembled assembly of inserting overcurrent relay on this arch member, assembly can rotate around a run-on point that is fixed on the shell, and wherein crooked the or rotation by auxiliary bimetal piece makes that the position of this action bars run-on point is variable with respect to fast moving switching mechanism.
Advantage of the present utility model is, by a grip assembly of being made up of three parts only, but assembles in advance and with pre-assembled components unit form when mounted in the insertion apparatus, and can realize multinomial combination function.The combination function of this grip assembly comprises the rotation of fast moving switching mechanism by action bars, the default and temperature-compensating of critical current.Action bars and auxiliary bimetal piece are to combine by described arch member.Can make auxiliary bimetal piece become the part of adjusting device thus.Electric current is provided with and temperature-compensating is default can realize by auxiliary bimetal piece.So need only that this grip assembly strictly is implanted in the housing its position in installation process and get on, can realize that not only accurate location also can realize the adjustment of critical current setting and temperature-compensating.
According to a kind of advantageous embodiments, arch member has second arm and an action bars that has the block that is used for auxiliary bimetal piece and has supporting projections, and supporting projections will assist bimetal piece to be pressed onto on the block.
According to a kind of further advantageous embodiments, in according to overcurrent relay of the present utility model, be provided with an adjusting device, can be used for making auxiliary bimetal piece fixing run-on point on housing to rotate.
According to a kind of further advantageous embodiments, in according to overcurrent relay of the present utility model, arch member has first support arm that is provided with the action bars run-on point, and is fixed on the housing and rotating second support arm.
According to a kind of further advantageous embodiments, in according to overcurrent relay of the present utility model, first support arm and second support arm can be gone up in the opposite direction and rotate.
According to a kind of further advantageous embodiments, in according to overcurrent relay of the present utility model, action bars is a double-arm lever, on its first end, be provided with the slide block that is connected with main bimetal piece, and action bars is rotated, and in rotation, second arm can with switch the lever acting in conjunction, carry out on off state and switch switching lever.
According to a kind of further advantageous embodiments, in according to overcurrent relay of the present utility model, switch lever and be rotating be installed in one with knife-edge support that housing is fixedlyed connected in, the top of knife-edge support can be kept by the tension spring of action bars the second end effect and its end with one, wherein the rotation of action bars can effect causes switching an on off state switching of lever to tension spring by the action bars the second end.
Embodiment and improvement project that the utility model further has superiority are provided by dependent claims.
Embodiment
This overcurrent relay 1 has a housing 2.Housing has surrounded in order to realize that all of overcurrent relay function must assembly and element, especially be the splicing ear of main current path, splicing ear for one or more auxiliary current paths, main thermo bimetal's part on the main current path, at least one contact position is used for disconnecting or conducting auxiliary current path, a fast moving switching mechanism is used to switch at least one contact and is positioned between two kinds of on off states, an action bars, it was pulled a definite break path when corresponding rotation, can act on the front contact of fast moving switching mechanism by its pivoting end thus, make fast moving switching mechanism be switched like this, also have a slide block device, the bending of main thermo bimetal's part can be delivered to action bars and get on.
The function of this overcurrent relay is that the crowd knows on principle.On main current path, because the heat that electric current produces, bending can appear in main thermo bimetal's part.When electric current had surpassed a definite critical value, this bending also can be enough strong, makes action bars rotate by the carriage transmission, finally makes action bars can cause fast moving switching mechanism to switch.
For critical current intensity is set, all need and set up an organization, itself or act directly on the action bars, perhaps act on the fast moving switching mechanism, wherein the distance on the action bars resting position time is variable between the front contact of the end of action bars and fast moving switching mechanism, and this distance also is identified as the switch distance.When this switch when becoming big, main thermo bimetal's part will need bigger bending, overcomes this switch distance and makes the handle that opens circuit can touch fast moving switching mechanism run-on point and switch.
The overcurrent relay that the crowd knows also is provided with the auxiliary bimetal piece of temperature.Under the situation that this type of switch is heated, as the rising of ambient temperature, then main thermo bimetal's part just begins bending, has reduced the switch distance.This does not wish to occur, because the switch distance should be irrelevant with ambient temperature as far as possible.In contrast, half all is provided with an auxiliary bimetal piece.Itself is just crooked in variation of ambient temperature, acts on the action bars, has compensated the effect of main thermo bimetal's part like this.When temperature improved, auxiliary bimetal piece can have been compensated because the switch distance that the temperature effect that occurs on main thermo bimetal's part causes reduces thus by the end of compressing dwang on the front contact.Cover adjusting device by auxiliary bimetal piece can make auxiliary bimetal piece be arranged on the position that needs when finishing device manufacturing and get on, and obtains and the suitable compensating effect of expecting that critical current intensity is relevant.
In the accompanying drawing, for the purpose of clear and definite, splicing ear, main thermo bimetal's part and slide block device are all not shown.
In housing 2, be provided with two auxiliary contact positions 3,4.They are to exist with position, dual contact, each self-contained two fixed contact piece 31,32 and 41,42, the corresponding respectively moving contact 36,37 and 46,47 that is arranged on separately on contact 33 and 34 can be made auxiliary current path 35 and 45 be disconnected or conducting by its conducting thus.Disconnect in the switch bit upper contact position 3 that illustrates, position, contact 4 is conductings.The contact pressure spring that unshowned other elements in addition all can have as in this type of device etc.
The switching of this position, contact, two places all is will be by means of fast moving switching mechanism 5.There is a knife-edge support 51 to be connected with housing 2 for this reason.In knife-edge support 51, supporting switching lever 52 by bracing frame 53.This lever is a double-arm lever, its first arm 54 carrying contacts 33, the second arms 55 carrying contacts 43.Inclination by lever 52 can be switched between the disconnection of position, contact 3 or 4 or conducting.
(has wrongly write with the projection on the bracing frame 53 54 on the top of knife-edge support 51.What above write 54 is lever arms.) link to each other with a tension spring 6 as switch member, the bottom of knife-edge support 51 is fixedly mounted on the housing with its other end.The switching lever of installing in the knife-edge support mode 52 can be by tension spring 6 with this form pulling, makes it touch in the firm gantry pillars in both sides one, can make like this or position, first contact 3 or position, second contact 4 closures.Switch the conversion after lever 52 is caused switching by the tension spring pulling, switch to second gantry pillars by first gantry pillars shown in the figure, on second gantry pillars, make position, contact 4 disconnect and 3 conductings of position, contact will realize by the rotation end 71 of action bars 7.Rotate end 71 with rotary contact 72 compressings on tension spring 6, and oppress it and rotate along clockwise direction, up to arriving dead-centre position and crossing it, tension spring will further spur rotating lever to second settling position in subsequent process then.Backward rotation is switched on lever to the first settling position and can be realized by the not shown resetting tool of another kind.
Fast moving switching mechanism embodiment shown in the figure is not the unique selection for described utility model implementation naturally.Especially a kind of mode that also can have position, simple contact or an other forms of rocking lever according to overcurrent relay of the present utility model realizes.Run-on point also can directly switched on the lever, and according to design, this class formation that all fast moving switching mechanism devices can be susceptible to all belongs to the utility model category.
Rotating lever 7 is double-arm levers of a T word configuration, has a transverse arm, and being provided with operating point 73 at its first free end can be rotated by not shown slide block mechanism, and this slide block mechanism has made up and being connected of same unshowned main thermo bimetal's part.The effect of slide block mechanism identifies out with a force vector arrow S.
Second free end of transverse arm is provided with described rotation end 71.
Short support 74 with its free end 75 with between two dentations 82,83 on the end of first support arm 81 that can the swing mode be installed in arch member 8.This free end 75 is constructed a part cylinder axial plane that belongs to first jointed shaft 9, is embedded between two dentations 82,83, installs swingably with similar hinge form herein.
On the extended line of first support arm 81, at its other end, arch member 8 has its second support arm 84.An axis hole 85 is arranged herein, second support arm 84 can be installed in rotation on the fixing gudgeon of a relative housing on second pivot 10 by it.By the rotation of arch member 8, can make first jointed shaft 9 that switches lever 7 also and then rotate around second pivot, 10 places.
First support arm 86 stretches out perpendicular to described two support arms 81,84.It is a stop edge 87 in the end, leans against on the auxiliary bimetal piece 11.Auxiliary bimetal piece is a rectangle sheet metal, and its support level 111 that is supported on the stop edge 87 is to be positioned on self the latter half.A bolt hole 112 at auxiliary bimetal piece end bearing, the threaded portion of regulating bolt 12 can screw in this bolt hole.The bolt head 121 of adjusting bolt 12 remains on opening 89 places on second support arm, 87 free ends rotationally.The position of this adjusting bolt 12 is so to set, and makes it can embed rotationally in the crack that one second support arm, 87 free ends, 88 places are made of two dentations by the notch of a bolt head 121.
Twist thus and regulate bolt 12 and will regulate distance between the free end 88 of auxiliary bimetal piece 11 free ends and arch member 8 second support arms 87.
Form a block 76 on action bars 7, its directed downwards is towards stop edge 87.Block is carrying a hemisphere face 77 at place, self end.Can put into block, up to block can be urged on the auxiliary bimetal piece approximately stop edge 87 positions with its hemisphere face 77 on always.Like this at action bars 7 when first jointed shaft 9 rotates, auxiliary bimetal piece 11 thus can be by regulating bolt 12 and closely linking to each other with arch member 8 in the compacting at stop edge place.In this case, action bars 7, arch member 8 and auxiliary bimetal piece 11 have constituted a grip assembly 14, it can assemble in advance and can insert in the housing 2 when mounted with pre-assembled components unit 14 forms, and sentences rotatable form in second installation site 10 and be connected with housing 2.
What fixedly connected with housing 2 also has one to set up an organization 13, and it acts on second free end, 113 places of auxiliary bimetal piece 11.A unfaithful intention bolt is arranged herein, and it can make auxiliary bimetal piece 11 swing around 10 places, second installation site with respect to housing 2 with its unfaithful intention projection 131 when rotating.
A compressing shell fragment 15 is pressed on the assembly 14 in the counterclockwise direction with self free end, and the other end of wherein oppressing shell fragment is fixedly mounted on the housing.Can make the free end 113 of auxiliary bimetal piece 11 always can be pressed on the unfaithful intention projection 131 of unfaithful intention bolt 13 thus.Assembly 14 is in one when being defined as on the rest position, and its turned position can be adjusted by the rotation of unfaithful intention bolt 13.Described compressing shell fragment also can hold down assembly 14 certainly on other positions.This illustrates just and can exist any mode to come positioning component 14 what relation is specific implementation do not have.The compressing shell fragment goes out the position as shown in FIG. as the side direction shell fragment and mode is provided with, just an exemplary example.
When for example continuing to rotate along clockwise direction on unfaithful intention bolt 13 continues by position shown in the figure, compressing shell fragment 15 can be because the radius that bolt unfaithful intention projection 131 self diminishes and swing in the counterclockwise direction.Can make the installation site 9 of action bars 7 to swing counterclockwise thus, this makes the run-on point position of action bars 7 change to some extent with respect to knife-edge support 51, makes the distance of rotating between end 71 and the run-on point 72 become greatly.When unfaithful intention bolt 13 by change in location shown in the figure, when being rotated in the counterclockwise direction, assembly 14 can be met the elastic force to the compressing shell fragment because bolt unfaithful intention projection 131 self becomes big radius and swing along clockwise direction.Also swing to clockwise direction installation site 9, this makes the run-on point position of action bars 7 change to some extent with respect to knife-edge support 51, make the distance of rotating between end 71 and the run-on point 72 diminish, even may on dead-centre position, released a segment distance by tension spring.
Assembly 14 has been known with basic just description of the function of fast moving switching mechanism 5 auxiliary works.When slide block rotates from operating point 73, to action bars 7 application of forces time, action bars rotates along clockwise direction around the run-on point of self installation site 9 along arrow S direction.Rotate end 71 and oppress on tension spring 6, oppress it and cross dead-centre position, make fast moving switching mechanism 5 completion statuses switch with its run-on point 72.
Above described and how to have adjusted the switch distance by the rotation of unfaithful intention bolt 13.When overcurrent relay will be in the face of big overload current when just finishing switching, when promptly main thermo bimetal's part need be than macrobending, just need big switch distance, unfaithful intention bolt 13 can rotate setting along clockwise direction.Under reverse situation, overcurrent relay need be in the face of when lower overload current will switch, and when promptly main thermo bimetal's part needed less bending, then unfaithful intention bolt 13 can rotate setting in the counterclockwise direction.Can make the electric current susceptibility that in use also can set overcurrent relay according to assembly 14 of the present utility model by this unfaithful intention bolt.
The function of auxiliary bimetal piece and temperature compensation means is as follows.In the time of for example ambient temperature or the rising of enclosure interior temperature, auxiliary bimetal piece 11 will be crooked along clockwise direction, along arrow U indication.Auxiliary bimetal piece is fixedlyed connected with assembly 14 to regulate bolt 12, is close on stop edge 87 by block 76.Have only the part of auxiliary bimetal piece between stop edge 87 and unfaithful intention bolt 13 free ends 113 can be crooked like this.Between auxiliary bimetal piece 11 free ends 113 and unfaithful intention bolt a gap has appearred so just.Because the compressing of compressing shell fragment 15, assembly 14 always is pressed on the unfaithful intention projection 131 of unfaithful intention bolt 13, can cause like this rotating around second mounting points 10 in the counterclockwise direction.The position of the relative knife-edge support 51 of action bars 7 run-on points 9 will change to some extent thus, makes this switch distance diminish, and has obtained and main thermo bimetal's part reverse effect when arrow S drives.
The rotation of regulating bolt 12 can cause auxiliary bimetal piece 11 to be rotated around stop edge 87, and wherein assembly 14 equally also is to rotate around second installation position 10, and configuration switch distance thus.The purpose of this adjusting is, can trigger opening circuit of this electric current in order to ensure the critical current of being set by the unfaithful intention bolt, and irrelevant with the location tolerance or the material error of auxiliary bimetal piece.This adjusting need be carried out respectively on each table apparatus, all will set correct switch distance respectively on each table apparatus, is decided by regulating bolt by the nominal current intensity of setting by unfaithful intention bolt 13.
According to assembly 14 of the present utility model, it is action bars 7, and arch member 8 and auxiliary bimetal piece 11 are connected to each other, and be integral can pre-assembled assembly, comprises also to allow these three functions to comprise adjusting, critical current is set and temperature-compensating, by also only realizing by this assembly.Can successfully achieve the goal like this, in the time of rotation that auxiliary bimetal piece occurs and bending, will produce of the rotation of an action bars run-on point 9 owing to the fixedly feedback of arch member 8 with respect to fast moving switching mechanism knife-edge support 51.In device assembles, just only assembly 14 correctly need be installed in the housing, can have automatically and carry out temperature-compensating and cut off the power supply required accurate location is set.