CN100423159C

CN100423159C - Clamping auxiliary element

Info

Publication number: CN100423159C
Application number: CNB2005100895012A
Authority: CN
Inventors: G·舒
Original assignee: Moller Automation
Current assignee: Moller Automation; Moeller Gebaudeautomation GmbH
Priority date: 2001-03-20
Filing date: 2002-03-15
Publication date: 2008-10-01
Anticipated expiration: 2022-03-15
Also published as: EP1746619A1; MY138816A; CZ20032391A3; HK1100240A1; EP1389341A2; EA004608B1; EP1389341B8; CN1520601A; EP1389341B1; ES2290273T3; ATE369615T1; DE50210642D1; EA200301032A1; EP1746619B1; AU2002240690A1; CN1758402A; HK1063384A1; WO2002075889A3; CN1252772C; ES2372759T3

Abstract

The invention relates to a lifting clamp (1) for mounting in a housing of an electrical appliance, e.g. a circuit-breaker, comprising a rectangular frame (14) and a rectangular box (15), the upper section (150) of said box being arranged between the upper section (140) and the lower section (141) of the frame (14), enabling the box (15) to be held in the frame (14) in a displaceable manner. Said lifting clamp also comprises a clamping screw (16) which is guided through an opening (142) incorporated in the upper section (140) of the frame in a freely rotatable manner, and which engages in a screw thread (152) incorporated in the upper section (150) of the box (15). Said box (15) is held in the frame (14) against a resistance in a displaceable manner.

Description

Clamping auxiliary element

The application is application number the dividing an application for the patent application of " clamping auxiliary element " that be 028068149 denomination of invention.

Technical field

The present invention relates to a kind of for example lifting wire clamp of the shell of line protection switch of Box of electric machine that is used for being assembled into; comprise a rectangular frame and a rectangular box; the top of box is installed between the top and the bottom of framework, and this box just can remain in the framework and can be shifted like this.Also comprise a pinching screw in addition, it can rotate freely by the through hole that framework upper divides and enter, and with the screw thread interlock mutually on box top, it is mobile in framework that box can head on impedor thus.

Background technology

This lifting wire clamp has ground, two places circuit can be clamped, and a place is between framework lower part and box lower part (the bottom installing zone), and another place is between the top (top installing zone) of framework upper branch and pinching screw.

When pinching screw when opening direction rotates, box at first moves downward, the bottom installing zone is opened like this.Have only when box arrives the installation site of cabinet bottommost, if pinching screw continues towards the opening direction motion, pinching screw will move upward, and the top installing zone can be opened like this.

When the tension pinching screw, at first must not stop to rotate it, touch the framework lower part up to the lower part of box, have only after this, pinching screw can be converted to just that head of screw and framework upper divide or docks with the clamping of electric conductor direction between top and head of screw rotatablely moving on the closing direction.

If only use the installation site, top, so in order to open this position, or on this position, electric conductor is clamped, the scope of pinching screw rotation just must be very big, thereby will be longer relatively the time consumption that is wired to the lifting wire clamp.This binding clip of band terminal box is for example open at EP 0 168 596 A.Such lifting wire clamp is also arranged among EP 0 905 839 A.

Now the lifting wire clamp be familiar with of people is, there is an impedor its inside, and the direction that terminal box can head on this impedor moves, and with regard to reducing electric wire is installed in time on the lifting wire clamp like this.In DE 195 13281 A, DE 2 107 218 A and EP 1 028 489 A, disclose this binding post or promote wire clamp, there is an impedor their the insides, box can head on this impedor in framework direction moves and is held, and each is all realized by spring.At EP 0 280 672 A middle impedances is that friction by box and part cabinet realizes.

The shortcoming of this prior art is, box heads on mobile impedor and may be overcome by accident in the framework, and the bottom installing zone just might be opened ahead of time like this.

Summary of the invention

Task of the present invention is avoided this shortcoming exactly, and provides the lifting wire clamp of the described type of beginning.In this lifting wire clamp, when pinching screw when opening direction rotates, at first framework upper divide and the screw top between installing zone be opened, but the installing zone temporary close of bottom.The bottom installing zone only just can be opened under the situation of special measure taking, when for example applying bigger pressure to screw, so that can effectively avoid box to move unexpectedly.

The following solution of this point according to the present invention, impedor is fixed on cabinet by one, and preferably the shearing bolt with cabinet one formation forms, and shears bolt and box-like shape and links together ordinatedly.

If do not apply powerful power when the rotation pinching screw, just not than bigger external force that screw is essential of rotation, impedor at first will stop moving of box so.The opening movement of screw will be converted to the motion on head of screw lift frame top fully, just is converted to the motion of opening the top installing zone.This allows after pinching screw slightly rotates towards opening direction, and the lug plate of wiring system is arranged to the top installing zone, and pinching screw slightly rotates towards closing direction then, and lug plate is clamped reliably.

When impedance is overcome, for example by exerting pressure, just can overcome impedance to pinching screw, box is pushed down, and the bottom installing zone is opened.Particularly at first can avoid box to move, so particularly can effectively avoid the accident of box to move towards any of framework by shearing bolt.After shearing the bolt shearing, box will be moved, and the installing zone of bottom just can be opened.

Also possible, impedance forms by the spring in the box bottom, executes the helical spring of bias voltage for example for towards the framework direction box.

The loss As time goes on or in regular compaction process of the strength of spring is very little, particularly littler than two mutual fricative loss of friction of adjacent part.The method of this realization impedance has the advantage that helps increasing the service life than the method based on two part frictions.

Impedance also can be by lug plate and cabinet the friction of a part produce.Its advantage is, only uses original existing part to form impedance, can avoid the part that separates separately like this and be used to produce the technology that they are installed expending.

The present invention is one and is used to be assembled into Box of electric machine, the shell of line protection switch for example, in lifting wire clamp 1, comprise a rectangular frame 14 and a rectangular box 15.The top of box is installed between the top and the bottom of framework, and this box just can be shifted in framework and be held like this.Also comprise a pinching screw in addition, it can rotate freely by the hole that framework upper divides and enter, with the screw thread interlock mutually on box top.Also have a lug plate that is fixed on the box in addition, it extends to the space of box bottom from the lower part of box, with the same adjacent hole plane parallel of wire clamp that promotes in the cabinet.

In EP 0 559 585 A and US 5 580 285 A, disclose this band and be fixed on the lug plate on the box or the lifting wire clamp of brace.The shortcoming of EP 0 559 585 A is that lug plate and the can introduced are integrally formed, and the electric insulation protection so just can not be provided.In contrast, US 5 580 285 A express a special structure, and a removable brace is arranged.But it only is fixed on the box by a hooklet, and narrow and small like this connection plane can not provide any reliable connection.

Another task of the present invention is that the lug plate and the box of installing zone reliably link together bottom will being used to cover.

According to the following solution of task of the present invention, on the lug plate next door tablet parallel with the box lower part is arranged, be connected with box by its lug plate.The cross section, hole that is positioned at bottom, box lower part has been capped, and so just can avoid the below with the lower part that is placed in box of lead mistake.Tablet can realize that contact and assurance in a big way is connected reliably with box.

Xiang Guan scheme also has in addition therewith, is formed with a small-sized installation chassis perpendicular to little square position and lug plate on little square position, fixedlys connected in a side of it and box.

Relevant therewith also have more invention design: form a pin on small-sized installation chassis, it and the hole interlock mutually of box side.

Like this box just can be fixed on one simple especially, have only on the structure that a small amount of technology expends, just by the box non-packed on small-sized installation chassis, thereby fix with it.

Relevant therewith can also make a call to a hole at small-sized installation chassis, is fixed on the shearing bolt phase interlock with it in the cabinet.

Not only can realize its major function by the shearing bolt is installed, promptly provide impedance to prevent the box displacement, but also comprise the miscellaneous function that realizes supporting small-sized installation chassis, tablet and lug plate in the cabinet.When being assembled into switch element in the cabinet, support chassis, tablet and lug plate will be installed in the lower cover automatically.

Description of drawings

Describe the present invention in detail below with reference to accompanying drawing, represent a particularly preferred embodiment in the accompanying drawing.In the accompanying drawing:

Fig. 1 is that expression is equipped with the plane graph according to the line protection switch of lifting wire clamp 1 of the present invention, and loam cake is removed.

Fig. 2 only represents to be equipped with the inclination pattern according to the lower cover of the line protection switch of Fig. 1 that promotes wire clamp 1, wherein shows second the lifting wire clamp 1 that is placed on outside the lower cover.

Fig. 3 only represents to be equipped with the plane graph according to the lower cover of the line protection switch of Fig. 1 that the right promotes wire clamp 1, and on the left side promotes in the zone of wire clamp, is provided with a lug plate 24 that is fixed on the box 15 that promotes wire clamp 1.

The inclination pattern of Fig. 4 presentation graphs 3.

Fig. 5 represents to be assembled in the plane graph of the lifting wire clamp 1 of the present invention in the cabinet, wherein, forms impedor by spiral compression spring 32, and the box 15 in the lifting wire clamp 1 can head on this impedor and move.

Fig. 6 presentation graphs 5 is represented, wherein replaces spiral compression spring 32 to provide a shearing bolt of installing on the cabinet inwall to form impedor.

Embodiment

The line protection switch that Fig. 1 represents comprise two according to of the present invention, as the bar clamp 1 of so-called " lifting wire clamp ", can be connected to the pectination lug plate of line conductor and wiring system on the protection switch by them.

Protection switch also comprises an overload release 2 and a short circuit trip gear 3 in addition, also has a switching mechanism 4, is used for shifting armature contact 5 onto enable possition depicted in figure 1 from the detent position that is close on the fixed contact 8.

The electric current that is monitored in protection switch flows into from the bar clamp 1 on the right; at first through overload release 2; arrive armature contact 5 by movable lead 6 and moving bridge contact 7, arrive short circuit trip gear 3 by fixed contact 8 then, at last to second binding post 1.

Switching mechanism 4 not only can be by short-circuit release device 3 but also can be activated by overload release 2, short-circuit release device 3 forms according to the solenoid of known mode by the band moving armature, the moving bridge contact 7 of armature meeting impact switch mechanism 4 under the situation of corresponding powerful short circuit current.

Overload release 2 is made up of a bimetal leaf, and it is by being monitored current flow heats.First end 21 of bimetal leaf is fixed in the cabinet of protection switch, and second end 22 can be free movable.Therefore pass to second end 22 by adding bending that thrermostatic bimetal-plate produces according to the direction of arrow 23.Under enough strong heating condition, bimetal leaf free terminal 22 contacts with cramp frame 9 on handle bracket 36 at the volley, is being with cramp frame and activation switch mechanism 4 on the direction of motion.

Moving bridge contact 7 is by spring 10, is applied in bias voltage along the direction of armature contact 5 open positions.Armature by short circuit trip gear 3 or overload release 2 passes the handle bracket 36 described slight deflections on the cramp frame 9, can be strengthened towards the locality that moving bridge contact 7 turns to armature contact 5 to open fully by spring 10.

In order to connect protection switch, just contact holder 7 has designed the lever 11 of a manual control that can get at from the outside to the adverse yaw of armature contact 5 off-positions.

The cabinet of protection switch is made up of two parts according to known method, and one is appreciable in the drawings lower cover 12, and another does not draw in the drawings, and its concrete structure and lower cover 12 are mutually the loam cake of mirror image.

The invention relates to and promote wire clamp 1, but it is not limited in line protection switch and uses.Only drawn in the drawings line protection switch or its lower cover 12 are because lifting wire clamp 1 of the present invention has special priority application field at this.Although it can be at the electrical equipment of any type, failure current protection switch for example, the discharger isolating switch is used in the indoor automaton of stair.

As the bar clamp of the type of being familiar with so far, lifting wire clamp 1 of the present invention has framework 14, and it is rectangle in Fig. 1.Under normal conditions it by one whole section, by three 90 the degree bent angles copper strips form.Framework 14 is maintained fixed motionless in cabinet, for example can touch the lower cover inwall by the clamping structure moulding.

Second main element that promotes wire clamp 1 is box 15, is the frame shape (see figure 2) equally.Box 15 relative frameworks 14 revolve and turn 90 degrees, and are suspended on the inside, and promptly the top 150 of box 15 is between framework 14 tops 140 and lower part 141.Box 15 just can move in framework 14 like this.

The 3rd main element that promotes wire clamp 1 is pinching screw 16, and the top 140 of framework 14 has a hole 142, and pinching screw 16 can freely rotate into.A screw thread 152 is arranged, pinching screw 16 interlock with it in the top 150 of box 15.When if pinching screw 16 rotates toward closing direction, (, in the structure of pinching screw 16, being rotated in a clockwise direction) promptly as right screw, box 15 can raise, and promptly divides 140 direction motion to framework upper.Displacement is just realized like this, because the bottom end of pinching screw 16 arrives framework lower part 141 or its top 160 arrival framework uppers divide 140.Pinching screw 16 continues rotation and can not cause pinching screw 16 to move down in the screw thread 152 on box, but box 15 is lifted.

When pinching screw 16 to opening direction rotation (promptly as right screw, in the pinching screw structure to rotation counterclockwise), box 15 will descend, and promptly moves to framework lower part 141 directions.

This lifting wire clamp 1 has two places can clamp electric wire, and a place can be incorporated into lead-in wire the space 17 between framework lower part 141 and the box lower part 151, another place can be introduced in framework upper divide 140 and head of screw 160 between space 18 (see figure 2)s.In the time of tension pinching screw 16, not only the lower part 151 of the lower part 141 of framework 14 and box 15 each other, and head of screw 16 and framework upper all compress between dividing 140, thereby clamp the lead of introducing

space

17,18.

The ordinary circumstance lower wire can be assembled to the space 17 between framework lower part 141 and the box lower part 151, the lug plate of wiring system be installed to framework upper divide 140 and head of screw 16 between space 18.In order when these electric wires are installed, can to enter

space

17,18, on cabinet, opening 19 and 20 have been designed with highly consistent place,

space

17,18.

Wire installation is arrived under the situation in space 17, particularly when binding post is opened greatly inadequately, just the lower part 150 of box 15 is too near from the lower part 141 of framework 14, will have problems like this, though be that lead has passed opening 19, but because mistake is not installed in space 17, but below box 15.Just can not be again clamping wire on request.

Take place for fear of this wrong situation that lead is installed, fixed a lug plate 24 on box 15, it is vertical with the lower part 151 of box 15, extends to the space of box 15 bottoms then.The plane parallel of lug plate 24 and opening 19 and be close to the side that is installed in it.

Owing to be connected with box 15, lug plate 24 meetings and box 15 are subjected to displacement and cover the part of the opening 19 of box 15 bottoms together.The lead that passes opening 19 like this can only be installed in the space 17 between framework lower part 141 and the box lower part 151, the said error situation that lead is installed in box 15 bottoms above having avoided reliably.

Can implement arbitrarily on lug plate 24 structures.For example it can with 15 one-tenth integral body of box, for example the lath by same conduction is crooked as box 15.It also can be with box 15 separately and and box 15 close-connected parts one for example weld or paste.It also can be made by the material such as the plastics of insulation.Its benefit is, when giving its binding post making alive, this situation is possible when lead with voltage is connected with another binding post, and lug plate 24 can be by safe contact.

In the embodiment shown in Fig. 1-4, on lug plate 24, form a tablet 25 parallel with box lower part 151, be connected with box 15 by these tablet 25 lug plates 24.Tablet 25 can be pasted or welding with box lower part 151 for this reason.

According to the embodiment of Fig. 1-4, by small-sized installation chassis 26, tablet 25 and box lower part 151 are coupled together, this chassis forms on tablet 25, and is vertical with lug plate 24 with tablet 25.By pasting or welding fixedlyed connected in a side of this small-sized installation chassis 26 and box 15.

Represented in Fig. 1-4, be used for a kind of preferential mount scheme that installation chassis 26 is fixed on the box 15 has been equipped with a pin, it is on installation chassis 26.A hole 28 is arranged on the box side, pin 27 interlock with it, so just can with chassis 26 and lug plate 24 form fit be fixed on the box 15.

As discussed above, promoting wire clamp 1 has position, two places can clamp electric wire, i.e.

space

17 and 18, and electric wire can be installed in down space 17 generally speaking, and the lug plate of wiring system is installed in space 18.

What generally link to each other on a kind of splicing ear has only one type lead, and the lug plate that is not wiring system is exactly a lead.

When opening binding post, under the effect of screwdriver, tighten screw 16 and not only rotate, and be pressed down.In the lifting wire clamp that has only so far the architectural characteristic of discussing, can cause head of screw 16 to divide 141 extruding towards framework upper all the time like this, the rotation of pinching screw 16 just be converted to box 15 to bottom offset, just open space 17.When having only the position when cabinet part 29 next doors below box 15 moves downward it fully, box 15 just can not move downward again.The opening movement that pinching screw 16 carries out always can transfer to pinching screw 16 to top offset, head of screw 160 can lift from framework upper 140 like this, upper space 18 can be opened.

When pinching screw 16 rotated towards closing direction, at first space 18 can be closed, and box 15 raises then, is positioned at the lower part 141 of framework 14 up to its lower part 151.Continue after this towards closing direction rotation pinching screw 16, head of screw 160 can clampedly divide 140 to push to framework upper.

Type of action is with good conditionsi, and when a lifting wire clamp 1 only connected the lug plate of a wiring system, at first pinching screw 16 can be by complete opening, and lug plate is installed into behind the space 18 again by complete closure.

In order to eliminate time-consuming installation process, the present invention stipulates that the box 15 that promotes in the wire clamp 1 is not freely, moves but can head on an impedance in framework 14.This impedance can realize by different modes.

For example the part of box 15 and framework 14 or cabinet is close together and produces friction.What produce between box 15 and framework 14 or crate part divide like this adheres to friction, at first stop box 15 displacement discussed above to take place to framework 14 tops, pinching screw 16 is when opening direction rotates like this, will from box 15 and framework 14, be shifted out, when closing direction rotates, will enter box 15 and framework 14.(friction) impedance magnitude is definite like this, makes for example by it can be overcome when head of screw 160 is exerted pressure.This just allows when pinching screw 16 rotations, as long as be ready, space 17 can be opened at once.

In the embodiment of cabinet shown in Figure 1, on the top of head of screw 160 a support muscle 30 is arranged, a boring 31 is arranged on it.When rotation during pinching screw 16, screwdriver can be holed from this and 31 be entered, and its diameter is littler than the head of screw 160 of pinching screw 16.

When pinching screw 16 moves upward, promptly toward the opening direction rotation time, take place, if do not exert pressure to it simultaneously, head of screw 160 will move to support muscle 30.If pinching screw 16 continues now towards the opening direction rotation, box 15 will be to pressing down, because pinching screw 16 can not move upward again so.Just can overcome impedance in this situation, box 15 can be pushed down.

As shown in Figure 5, can realize impedance by spring 32, spring 32 is given the direction biasing of box 15 to framework 14.For this reason, spring 32 can be realized by spring leaf or as the spiral compression spring of being introduced among Fig. 5 that passes through.Spiral compression spring is in the bottom of box 15, and an end is supported on cabinet part 29, as long as the words of this structure of the connection of the other end by tablet 25-have-the be supported on lower part 151 of box 15.

The scheme that more realization impedances also can be arranged simultaneously, for example box 15 not only can but also can produce friction with cabinet with framework 14, perhaps can realize the friction supporting of box 15 in framework 14 with spring 32 in addition.

As what find out from the hindrance function that has illustrated, can be equipped with a necessary part that does not rely on lug plate 24 and realize impedance, promptly can not need lug plate 24.If a lug plate 24 is arranged, can place by lug plate 24 friction of 12 in cabinet and realize impedance.

The scheme of the realization impedance of being introduced has a common ground, promptly all must continue to produce impedance, that is to say that the process middle impedance that moves at box 15 does not change basically.

In a kind of preferred embodiment of the present invention, be provided with a shearing nut 33 that is fixed in the cabinet.When position that it is introduced in Fig. 1 and 6, it just can carry out being connected of form fit with box 15.This can perhaps be installed in it the place near 151 bottoms, box lower part, as shown in Figure 6 by the hole mutually interlock realization of sheared helical 33 with the box side.

, in the process of opening direction rotation, shear bolt 33 and at first can stop box 15 any moving at pinching screw 16, rotatablely move and to change moving upward of pinching screw 16 into.If apply an enough big longitudinal pressure (for example when support muscle 30 has been close at its top 160, knock it or continue rotation it) for pinching screw 16, to shear bolt 33 and will be cut off, box 15 is from now just having moved freely fully.

Realize that at this this is temporary transient in scheme of impedance, only that is to say to be sheared preceding enforcement at shearing bolt 33.

When shearing bolt 33 when intact, only having living space 18 is opened or is closed, and the brace of wiring system only need expend a spot of rotation and just can be connected with lifting wire clamp 1 like this.

Equally also be provided with this shearing bolt 33 in a kind of preferred embodiment of introducing in detail in Fig. 1-4, it links to each other indirectly with box 15.

In this embodiment as above introduced in detail, lug plate 24 is arranged in this structure, be formed with the tablet 25 that becomes one with installation chassis 26 above it.This small-sized installation chassis 26 is bearing in the rectangular guide groove 34 in the cabinet, can be along parallel the moving of direction of moving with box 15.Be the pin 27 that is used for connecting chassis 26 and box 15 on small-sized installation chassis, it with the box side on hole 28 interlock mutually.

Shear the bottom of bolt 33 at guide groove 34.Small-sized installation chassis 26 has a hole 35, shears bolt 33 interlock with it (seeing Fig. 2,3).Shear bolt 33 in this case indirectly, promptly under the connection of installation chassis 26 and pin 27, link to each other with box 15.

The shearing strength of pin 27 is corresponding higher than shearing bolt 33, the shear action of in fact just shearing bolt 33 for pinching screw 16 applied pressures, rather than the effect of pin 27 like this.

Shearing bolt 33 among this embodiment has a booster action, it with installation chassis 26 or utilize the chassis with lug plate 24 in the process of switch is installed, be about to single part and be installed in the cabinet lower cover, be placed into concrete position.The installation chassis of this belt transect tablet 25 and lug plate 24 can be installed to lower cover automatically, and the framework 14 and the box 15 that promote wire clamp 1 can be placed on the chassis 26 like a cork.

Claims

1. lifting wire clamp (1) that is used for being assembled into Box of electric machine, comprise a rectangular frame (14) and a rectangular box (15), the top of box (150) is installed between the top (140) and lower part (141) of framework (14), this box (15) can be remained in the framework (14) also can be shifted, also comprise a pinching screw (16) in addition, it can rotate freely by a hole (142) of framework upper branch (140) and enter, screw thread (152) interlock mutually with box (15) top (150), be fixed on the lug plate (24) on the box (15) in addition in addition, extend to the space of box (15) bottom from the lower part of box (15), with the close plane parallel that promotes the hole of wire clamp (1) on the cabinet, wherein, go up tablet (25) parallel of formation at lug plate (24) with box lower part (151), join by its lug plate (24) and box (15), on the next door of tablet (25) be one with all vertical small-sized installation chassis (26) of tablet and lug plate (24), it is fixedlyed connected with the side of box (15), it is characterized in that, a through hole (35) is arranged on small-sized installation chassis (26), be fixed on shearing bolt (33) the phase interlock with it on the cabinet.

2. according to the lifting wire clamp (1) of claim 1, it is characterized in that a pin (27) is arranged on small-sized installation chassis (26), it and through hole (28) interlock mutually on the box side.