JPH0237654B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention has a fixing device cooperating with a bus bar on the underside of a pedestal with a fuse receptacle, the fastening device comprising a separate contact plate that covers the underside of the fuse receptacle. This invention relates to a slider fuse holder that can be attached to a bus bar and holds the fuse holder together with the bus bar.

Two types of fuse holders are used: the so-called Diazed type and the DO, or Dezero or Neozed type. Both types are operated by fuses of various higher rated current strengths and are incompatible in the sense that a higher rated current strength fuse cannot be mistakenly inserted into a fuse holder protecting a lower current strength circuit. In order to obtain this, a so-called gauge ring system is provided. The gauge ring is unenergized and places the fuse in a position precisely defined by its diameter. In the gauge ring system, the fuse is attached directly to the base contact or in this case to the conductive busbar.

In the delayed method, a mating screw is used to select the fuse. The mating screw is optionally oriented at the diameter of the fuse and in this case takes the diameter of the base contact, but at the same time takes an electrical connection to the base contact of the element or to the conductive busbar. This approach additionally means that the busbar must be provided with a screw hole from the beginning or that an adapter nut is required as an additional connecting member between the mating screw and the busbar.

A slider fuseholder of the type mentioned at the outset is known from DE 21 51 641 A1. In this known slider fuse holder, the contact plate is provided with a stepped portion having a screw hole for a fitting screw. The contact plate and the step are adapted to a constant thickness of the generatrix, so that contact plates with correspondingly designed steps have to be provided for generatrixes of different thicknesses. It is therefore based on the fact that the busbar is held on the contact plate by means of a cover plate and that the cover plate is rigidly and rotatably fixed in one piece to the pedestal. A further disadvantage therefore is that in order to loosen the slider fuse holder from the busbar, at least one screw holding the end of the cover plate that is not secured to the base against the busbar must be completely loosened. Something happens. In order to achieve sufficient retention, the remaining deformation of the cover plate must occur accordingly, so as to equalize the manufacturing tolerances. Furthermore, the known slider fuse holder is only adapted with regard to the screw-in type. In order to be able to use the known slider fuse holder also with a gauge ring system, further contact plate units must be provided.

The object of the invention is that it can be used both for the gauge ring system and also for the mating screw system by means of an integrally formed contact plate and that in each case it is possible to obtain a clear and large surface area in generatrices of different thicknesses and widths. The object of the present invention is to provide a slider fuse holder of the type mentioned at the outset, which can be secured by holding.

According to the present invention, the contact plate has a screw hole on the central axis of the fuse accommodating part, and the clamp is adjusted from the top of the pedestal in a recess on the underside of the pedestal outside the fuse accommodating part. placed with possible screws,
A clamp surrounds the contact plate and the busbar lying below it on one side, the opposite side of the contact plate is inserted into and held in the receiving groove of the base, and an adjustment screw surrounds the contact plate and the busbar opposite and to the clamp. This is solved by holding it against the

The fuse accommodating portion can accommodate a gauge ring supported by the contact plate. The fitting screw is screwed into the screw hole of the contact plate. In each case, the contact between the fuse and the contact plate results in an untightened screw cap of the slider fuse holder and upon carbonization only the contact plate has to be replaced. The retention between the clamp, the busbar and the contact plate is obvious and major and is independent of the thickness of the busbar, as long as it does not exceed the given values. The slider fuse holder can therefore be freely inserted and, nevertheless, easily released from the busbar, which is important for mounting and replacing the contact plate. In this configuration, the slider fuse holder has the advantage that although the fuses do not come into direct contact with the bus bar, the slider fuse holder can be attached to bus bars of different thicknesses by means of an integral contact plate, both for the gauge ring method and for the mating screw method. It has the advantage of the known slider fuse holder that it can.

According to another configuration, the contact plate is releasably fixed to the pedestal, in which case the contact plate can be easily replaced by loosening the adjustment screw.

According to one embodiment, the receiving groove for the contact plate is formed in that the receiving groove is connected to the underside of the fuse receptacle and is bounded by a leg of the pedestal.

Regarding the adjustment of the clamp in the recess of the pedestal, another embodiment provides that the recess is rectangular in shape and guides the clasp without twisting, the adjusting screw being oriented towards the upper side of the pedestal of the clasp. Adjustable in the screw hole on the side, the side facing the underside of the pedestal of the clamp has a tab facing the generatrix, and has a head that screws into the screw accommodating part of the clamp. An adjustment screw is provided to be removably retained within a hole in the bottom closing the recess in the base.

Correspondingly, the slider fuse holder can also be fixed to generatrixes of different thicknesses and of different widths, and according to other configurations, the spacing of the sides of the clamps is at least as thick as the thickness of the contact plate. and the spacing of the legs corresponding to the sum of the maximum thicknesses of the busbar and closing the receiving groove for the contact plate from the side surrounded by the clamp of the contact plate for inserting the busbar into the clamp. It is provided so as to exceed the maximum width of the generatrix for the given dimension.

Slider fuse holders are usually formed as a single fuse. However, according to other configurations, the pedestal can be provided with multiple fuse receptacles with separate contact plates and separate clamps.

According to another configuration, the attachment of the contact plate and the clamp is such that the end facing the contact plate of the adjusting screw, which is screwed into the threaded hole in the upper side of the clamp, is not removable. The contact plate, which is freely rotatably mounted in the contact plate and inserted into the receiving groove of the pedestal, is additionally facilitated by being tightened to the underside of the pedestal by means of fixing screws.

In this configuration, the contact plate, clamp and adjustment screw form a non-releasable prefabricated unit that can be quickly and easily attached to the pedestal and released from it again by means of an additional fixing screw. . The adjusting screw can then be loosened in the relaxed position, but it is not loosened by the clamp and the contact plate. Therefore,
The slider fuse holder can be easily secured to the busbar in a similar manner and released from it again. However, these parts are not released by the seat, so that the entire unit consisting of contact plate, clamp and adjustment screw can be replaced in the slider fuse holder removed from the bus bar.

The non-removable but freely rotatable fixation of the adjusting screw in the contact plate is achieved according to the invention by means of a through-hole in which the reduced diameter end of the adjusting screw tapers conically with respect to the adjusting screw in the contact plate. It is implemented in such a way that it is axially immovably but non-rotatably fixed by deformation in the bore.

According to one embodiment, the connection between the pedestal and the contact plate is such that the pedestal has a threaded blind hole on the underside between the fuse receptacle and the clamping recess and this threaded blind hole The contact plate is guided in such a way that it is provided with a conically tapered receptacle for the flat head of the fixing screw. In that case,
The fixing screws do not interfere with the installation of the busbar on the underside of the contact plate.

Insertion of the contact plate into the receiving groove of the pedestal is performed using a unit consisting of the contact plate, clamp and adjustment screw.
The end of the wall facing the contact plate, surrounded by the clamp of the recess, is located at a given spacing relative to the clamp when the contact plate is inserted into the receiving groove and clamped to the pedestal. This is made possible by being The recess is then directed towards the upper side of the base and passes directly into the protective case, which is provided in such a way that it accommodates and surrounds the head of the adjusting screw with an adjusting space. The adjusting screw therefore carries out the necessary adjusting movement within the protective case when inserting the contact plate into the receiving groove of the base and is accessible from the top of the base plate.

According to a further embodiment, the mounting and supporting of the contact plate on the pedestal is provided in that this wall of the recess has a step on which the end of the contact plate penetrated by the clamp is supported. be made to improve.

The present invention will be explained in detail based on illustrated embodiments.

In the slider fuse holder according to FIGS. 1 and 2, a base 11 made of an insulating material is provided with a through-hole fuse holder 35. In the slider fuse holder according to FIGS. On the upper side of the base 11, a threaded bridge 13 is fixed centrally to the fuse receptacle 35, and more precisely by flanges 16 and 18, which are connected to the base 11 by rivets 17 and 19. Extending from the downwardly bent edge are not only flanges 16 and 18, but also a connecting projection 14 with a mounting screw 15 for the conductor.

A rectangular or square recess 34 is placed outside the fuse holder 35 in the base 11 from below.
This recess 34 is pot-shaped and has a hole 26 for an adjusting screw 27 with a head 28 in its complete bottom, which closes off the upper side of the base 11. The adjusting screw 27 is guided through the hole 26 and screwed into a screw receptacle 30 in the upper side 31 of the clamp 29.
The adjusting screw 27 and the clamp 29 are then retained on the base 11 without being lost, since the head 28 serves as a support on the upper side of the base 11. This adjustment screw allows the clamp 29 to be placed in the recess 3.
It can be adjusted within 4. A protective case 25 formed above the base 11 protects the head 28 of the adjustment screw 27. The plug closes the protective case 25 and makes the head 28 of the adjusting screw 27 difficult to access.

The contact plate 23 has a screw hole 24 in the range of the central axis of the fuse accommodating portion 35 . A gauge ring support spring projects into the fuse accommodating portion 35 .
The contact plate 23 reaches into the recess 34 and the clamp 29
You will be guided inside. On the opposite side, the contact plate 23 is held in the receiving groove 22, which is connected to the base 11.
It is bounded by the leg 21 of. Accordingly, the contact plate 23 is releasably held under the base 11 and can be easily replaced.

The clamp 29 accommodates the bus bar 10 which is placed on the underside of the contact plate 23. Adjustment screw 27 and lower side part 32
The contact plate 23 and the bus bar 10 are fixed to each other between them. The spacing between the sides 31 and 32 of the clamp 29 is at least the sum of the thicknesses of the contact plates 23 and the maximum thickness of the busbar 10 is such that this type of slider fuse holder is fixed to busbars 10 of different thicknesses. adjusted so that it can be done.

Accordingly, the slider fuse holder can also be fixed to generatrices 10 of different widths,
With respect to the dimension given greater than the maximum width of the generatrix 10, it is the spacing between opposite sides of the contact plate 23 held in the receiving groove 22 and surrounded by the clamp 29. The dimensions given are selected such that the generatrix 10 can be guided further into the clamp 29. The lower side 32 of the clamp 29 is connected to the generatrix 10.
It also has claws 33 and the like directed toward the bus bar 10 to ensure good contact during fixing.

The fuse receptacle 35 can optionally accommodate a gauge ring or a gauge screw, so that finally a screw engagement with the contact plate 23 takes place in the screw hole 24 . Accessibility to the fuse never occurs directly to the busbar 10. The screw cap screwed onto the threaded bridge 13 may not be tightened tightly, in which case incomplete contact between the fuse and the contact plate 23 may occur. However, the carbonized contact plate 23 can be easily replaced without loosening all the elements fixed to the bus bar 10.

As shown in FIG. 3, the pedestal 11 can also have a number of fuse receptacles 35 and 35'. Arranged in each fuse receptacle 35 and 35' is a threaded bridge 13 or 13', a contact plate 23 or 23', a clamp 29 or 29' and an adjusting screw 27 or 27' with a head 28 or 28'. Ru. The contact plates 23 and 23' are connected to the legs 21
and 21'.
and 22' and is releasably held on the underside of the base 11. Adjustable clamps 29 and 29' in recesses 34 and 34' secure the seat 11 at the two parallel generatrix lines 10 and 10'.
At this time, the spacing between the adjusting screws 27 and the central axes of the fuse housings 35 and 35' are matched to the spacing between the central axes of the generatrix lines 10 and 10'. Pedestal 11
can be configured as dual or multiple fuses. As is clear, the pedestal 11 can be formed in parallel for two or multiple fuses in the longitudinal direction of the generatrix 10.

In the slider fuse holder according to FIGS. 4 and 5, the pedestal 11 made of insulating material is provided with a through-hole fuse holder 35. In the slider fuse holder according to FIGS. On the upper side of the base 11, a threaded bridge 13 is fixed centrally to the fuse receptacle 35 and, more precisely, to flanges 16 and 18 connected to the base 11 by rivets 17 and 19. Extending from the downwardly bent edge 12 are flanges 16 and 18 as well as a connecting projection 14 with mounting screws 15 for the electrical conductors.

Outside the fuse holder 35, a rectangular or square recess 34 is placed in the base 11 from below. The recess 34 merges directly into the protective housing 25 in the upper region of the base 11 .

The contact plate 23 has a screw hole 24 into which a fitting screw is inserted in the range of the central axis of the fuse accommodating portion 35 .

The adjusting screw 27 , which is screwed into a threaded hole 30 in the upper side 31 of the clamp 29 , extends to an end 41 offset in a diameter towards the contact plate 23 . This end 41 of the adjusting screw 27 is fixed in the through hole 40 of the contact plate 23 in an axially stable and freely rotatable manner. The through hole 40 is the adjustment screw 2
7 and tapered conically to end 4
1 is deformed so that it is adapted to the shape of the through hole 40. The clamp 29 together with the adjusting screw 27 and the contact plate 23 are thereby combined into a prefabricated unit that can be connected as a whole to the base 11 and released therefrom again.

The releasable mounting of the unit on the pedestal 11 is effected by fixing screws 37. This fixing screw 37, by means of its flat head 38,
and is screwed into a threaded blind hole 42 of the base 11 provided on the underside of the base 11 between the fuse housing 35 and the recess 34.
The flat head 38 of the fixing screw 37 is connected to the contact plate 2.
3 is effectively disposed within the receiving portion 39 so as not to interfere with the installation of the bus bar 10 on the lower side of the busbar 3 .

The contact plate 23 is inserted into the receiving groove 22 defined by the legs 21 of the base 11 below the fuse receiving portion 35 . Since the clamp 29 is then guided into the recess 34, the recess 34 must allow the necessary adjustment of the contact plate 23 for this purpose. The wall of the recess 34 facing the side surrounded by the clamp 29 of the contact plate 23 is located in the assembled state of the contact plate 23.
It has a spacing given to the contact plate 23 and the clamp 29 that is necessary for insertion into the receiving groove 22 for an adjustment distance of 3. The same adjustment clearance must also be provided by the head 28 of the adjustment screw 27 within the protective case 25.

Below the clamp 29, a side 32 with a tab 33 lies below the generatrix 10. Adjustment screw 27
In tightening, the base 11 is held by the generatrix 10 and the generatrix 10 is held by the lower side 32 of the clamp 29. If the adjustment screw 27 is loose, contact plate 23
The upper side 31 of the clamp 29 is
limited. The slider fuse holder is then laterally deflected away from the generatrix 10.
At this time, the unit consisting of the contact plate 23, the clamp 29 and the adjusting screw 27 is held on the base 11.
By loosening the fixing screw 37, the unit consisting of the contact plate 23, clamp 29 and adjusting screw 27 can be easily replaced.

In this embodiment, the contact plate 23 passes through the clamp 29 and is utilized on the base 11 for additional support. The wall of the recess 34 directed towards this end of the contact plate 23 is therefore such that the contact plate 23
7 has a stepped portion 42 that supports it when tightening. The adjustment screw 27 with the head 28 can be used while being protected by the protective case 25 from above the base 11.

[Brief explanation of drawings]

1 is a sectional view showing the slider fuse holder fixed to the generatrix along the line - in FIG. 2; FIG. 2 is a sectional view showing the slider fuse holder fixed to the generatrix according to FIG. 1; The figure is a cross-sectional view showing a double fuse with two fuse elements arranged in parallel, FIG. 4 is a cross-sectional view showing another embodiment of a slider fuse holder fixed to the generatrix, and FIG. FIG. 5 is a plan view showing the slider fuse holder fixed to the generatrix according to FIG. 4; In the figure, numeral 10 is a bus line, 11 is a pedestal, 21, 2
1' is a leg, 22 is a housing groove, 23, 23' are contact plates, 24 is a screw hole, 25 is a protective case, 26 is a hole, 27, 27' is an adjustment screw, 28 is a head, 29,
29' is a clamp, 30 is a screw accommodating part, 31 is an upper side part, 32 is a lower side part, 33 is a tab, 34 is a recess, 35, 35' are fuse accommodating parts, 37 is a fixing screw, 38 is a flat head, 39 is a housing part, 40
41 is a through hole, 41 is an end portion, and 42 is a step portion.

Claims (1)

[Scope of Claims] 1. A fixing device that cooperates with a busbar is provided on the underside of a pedestal having a fuse housing, and the fixing device attaches a separated contact plate that covers the bottom side of the fuse housing to the busbar. In the slider fuse holder that can be attached to a generatrix held together with the slider fuse holder, the contact plate has a screw hole on the central axis of the fuse accommodating part, and the contact plate has a screw hole on the center axis of the fuse accommodating part, and the contact plate has a screw hole on the outside of the fuse accommodating part in a recess on the lower side of the pedestal. a clamp is arranged with a screw adjustable from the upper side of the pedestal, the clamp encircling the contact plate and the generatrix lying below it on one side, and the opposite side of the contact plate is in the receiving groove of the pedestal. A slider fuse holder attachable to a bus bar, wherein the adjustment screw holds the contact plate and the bus bar facing each other and against the clamp. 2. The slider fuse holder attachable to a busbar according to claim 1, wherein the contact plate is releasably fixed to the base. 3. The slider fuse attachable to a busbar according to claim 1, wherein the housing groove is connected to the lower side of the fuse housing and is limited by the legs of the pedestal. holder. 4. the recess is rectangularly shaped and guides the clamp without twisting, the adjustment screw is adjustable in a screw hole in the side of the clamp directed towards the top of the base; A side portion of the clamp facing toward the lower side of the pedestal is provided with a tab toward the generatrix, and the adjustment screw, which has a head and is screwed into the screw accommodating portion of the clamp, is provided with a tab on the side of the pedestal. 4. A slider fuse holder attachable to a generatrix according to claim 1, wherein the fuse holder is removably held in a bottom hole closing the recess. 5. One of claims 1 to 4, characterized in that the distance between the side parts of the clamp corresponds at least to the sum of the thickness of the contact plate and the maximum thickness of the generatrix. A slider fuse holder that can be attached to the busbar described in . 6. The spacing of the legs closing the receiving groove for the contact plate from the side of the contact plate surrounded by the clamp is the dimension provided for inserting the generatrix into the clamp. 6. A slider fuse holder attachable to a busbar according to claim 1, wherein the width exceeds the maximum width of the busbar. 7. According to one of claims 1 to 6, the pedestal has a plurality of fuse receptacles with a plurality of separate contact plates and a plurality of separate clamps. Slider fuse holder that can be attached to the bus bar. 8. The end of the adjusting screw, which is screwed into the threaded hole in the upper side of the clamp, and which faces the contact plate, is not lost but is mounted freely rotatable within the contact plate, and According to one of claims 1 to 7, the contact plate inserted into the receiving groove of the pedestal is further tightened on the underside of the pedestal by a fixing screw. Slider fuse holder that can be attached to the listed busbars. 9. The reduced diameter end of the adjusting screw is rotatably fixed, although immovably due to deformation, in a through hole of the contact plate tapered conically with respect to the adjusting screw. A slider fuse holder attachable to a bus bar according to claim 8. 10 the pedestal has a threaded blind hole on the underside between the fuse receptacle and the recess for the clamp, and the contact plate has a flattened screw for the fixing screw in the area of this blind threaded hole; The device according to claim 8 or 9, further comprising a conically tapered accommodating portion with respect to the pedestal for the head. Slider fuse holder. 11. A wall directed towards the end of the contact plate surrounded by the clamp of the recess is provided against the clamp when inserted into the receiving groove and clamped to the pedestal. 11. A slider fuse holder attachable to a busbar according to claim 8, wherein the slider fuse holder is arranged at equal intervals. 12. The generatrix according to claim 11, wherein the wall of the recess has a step, and an end of the contact plate passing through the clamp is supported by the step. Slider fuse holder that can be attached to. 13. Claims 8 to 12, characterized in that the recess on the upper side of the pedestal transitions directly into a protective case that accommodates and surrounds the head of the adjustment screw with an adjustment space. A slider fuse holder attachable to the busbar according to one of the items.