DE7228803U - CONTACT WIRE FEED TERMINAL - Google Patents

Description

PATENTANWÄLTE DR.-ING. WOLFF, H. BARTELS,

DR. BRANDES, DR.-ING. HERO DIPL.-PHYS. WOLFF

STUTTGART 1

LONG STREET SI TELEPHONE (0711) J96310 and »7295

TELEX 0722312

Aug 3, 1971

Registration number. 123 179/3322 rrp

KARL PFTSTERER FABRIK ELECTROTECHNICAL SPECIAL ARTICLES, Stuttgart-Un-certürkheim (Baden-Württemberg; Federal Republic

Germany)

Contact wire feeder

The invention relates to a contact wire feed terminal for connecting a highly flexible feed conductor to a Grooved contact wire.- with a clamp body which can be closed by "blackmailing" and which is parallel to an open one, the receptacle of the contact wire head serving channel is provided with a hole for the connection of the feeder.

With a known clamp of this type, when changing the contact wire captured by the clamp, it is essential to cut off the feed conductor at the terminal, because the feed conductor will become detached from the terminal in a different way by loosening the contact wire terminal that has become unusable is not possible. This has the disadvantage that when the contact wire is changed, the feeder ladder is shortened, which is why it has to be renewed after several contact wire changes, which is associated with considerable costs.

The invention is based on the object of a contact wire feed terminal to create, which enables a contact wire change without shortening the feed conductor. Starting from a terminal of the type mentioned, this object is achieved according to the invention by one of an electrical highly conductive and compressible material consisting of bolts, one end portion of which has an axial bore, in which the feed conductor can be clamped by pre-pressing this end section, and its other end section is designed as a pin which can be clamped in the bore of the clamp body, and through a slot in the clamp body on the side facing away from the channel, which extends over the entire length of the clamp body and goes through to the hole.

Through the slot in the clamp body, it is possible, after loosening the clamp from the contact wire, the clamp body 'through a

Cut from the open channel towards the bore to be split into two parts, whereby the pin, which was initially in the The hole was jammed is released. Since the bolt remains firmly connected to the feeder, the When connecting the feed conductor to the new contact wire, only the spigot is inserted into the bore of a new terminal. And then this clamp to be crimped again. The bolt not only makes it easier to connect the feeder line with the new clamp, although this advantage alone considerably simplifies assembly because it is inserted of the feeder in a hole especially if it has to be done at the top in the area of the contact wire or if the end of the feed conductor is spread open, can cause considerable difficulties. The bolt makes it possible also to deliver the feed line to the assembly point with the connection bolt already attached, or to deliver it Press at least on the ground with the} V: \ Schiußbolsen 2U. In addition, the pin ensures that each time it is pressed again constant contact, what about the risk of corrosion is very important. A renewed pressing of one that has already been pressed once or several times

stranded
In contrast to this, the end of a / feed conductor would result in completely different contact relationships every time.

In a preferred embodiment, the jacket surface is of the pin provided with a longitudinal corrugation. This also ensures good contact, if the pin is already slightly deformed as a result of previous pressing.

Since it is also important for good contact between the pin and the clamp body that the pin the is in the correct position in the hole receiving it,

in a preferred embodiment, the pin has one of the dimensions of the Klenunenkörpers in the axial direction corresponding to «length, and also the bolt points at the transition a ring shoulder that can be placed on the clamp body for pin. With the Müntage, only the bolt is needed to be introduced into the bore until this ring shoulder is in contact with the clamp body. A perfect pressing is then guaranteed.

In an advantageous embodiment, it is hairpin-shaped Clamp made of a material that conducts electricity well and is harder than the material of the clamp body, their parallel, threaded legs with slight spreading into the grooves of the contact wire can be inserted and have a diameter which is greater than the depth of penetration of the legs into the grooves. Means such a clasp, which replaces the wedge-shaped projections of the clamp body engaging in the grooves, because the threads in the contact wire and the terminal body press more or less strongly, both the mechanical Strength as well as the electrical contact improved, so that even with a lower pressing pressure than achieved the same mechanical strength and quality of the electrical contact in the known ferrule and thus the risk of too high a pressure leading to a crushing of the contact wire with careless assembly completely can be excluded. In addition, the material of the clamp body can penetrate into the threads during pressing, whereby the risk of material compression and bending of the contact wire is also reduced.

Another significant advantage is that the clasp simplifies the assembly of the clamp. Namely, it can initially the legs of the clasp are inserted into the grooves of the contact wire. VBecause of the elasticity required for this

- 3a -

3a -

Spreading the legs, the brace remains in the desired position. Now the clamp body can be comfortably on the resilient fixed braces are pushed on. The clasp reliably fixes the clamp body in the desired position, up to he's pressed. With the known clamps, there was practically no fixation, since they were used for the engagement in the grooves of the contact wire provided projections had to have such a large distance from each other that they over the Contact wire head could be pushed from above. As a result, the protrusions could only be compressed in the contact wire grooves engage.

In the following the invention is explained in detail with reference to the embodiments shown in the drawing. Show it:

Fig. 1 is a side view of the embodiment in the assembled state;

FIG. 2 shows a section along the line II - II of FIG.

3 shows an end view of the embodiment in the unpressed state;

4 shows a longitudinal section of the bolt in the unpressed state;

5 shows an end view of a second exemplary embodiment in the unpressed state;

6 is a perspective view

of the second embodiment in the finished

assembled condition.

- 3b -

- 3b -

A contact wire feed terminal for connecting a highly flexible feed conductor 1 to a guide wire 2 has a clamp body 3 made of a compressible, electrically good conductive material, for example copper. As FIGS. 2 and 3 show, the clamp body 3 is with a downwardly open ^ groove 4 is provided, which extends over the extends the entire length of the clamp body and its flanks at a distance from the bottom of the groove two points facing each other

form shaped projections 5, the wedge angle of the angle Flanks of the grooves 6 of the grooved contact wire 2 adapted sina. The wedge-shaped projections 5, which extend over the entire length of the groove 4, have, as FIG. 2 shows, the task of engaging in the grooves 6 and thereby the terminal body 3 mechanically and electrically with the grooved contact wire 2 to connect. The depth of the groove 4 is chosen so that between the groove base and the surface facing it of the contact wire head there is a gap that a loosening of the terminal body 3 from the contact wire without a Damage or deformation of the grooved contact wire permitted. In the exemplary embodiment, the size of the gap is approximately equal to half the groove height, calculated from the cutting edges the projections 5 up to the groove base. The two laterally delimiting the groove 4 and formed symmetrically to the groove center Legs 7 are delimited in the area of the projections 5 on their outside d'-irch a flat surface 8, which approximately parallel ζ ^ the inside. "of the" groove 4 lying Boundary surface 5 'of the projection 5 is located. With the subsequent Side surfaces 9 of the clamp body 3, which converge slightly towards the top opposite the groove 4, the flat surfaces 8 close in the exemplary embodiment an angle of about 120 °.

At a distance from the groove 4, the clamp body 3 penetrates a bore 10, the longitudinal axis of which is in the longitudinal center plane of the terminal body 3, which is symmetrically formed with respect to this, lies. One that is also located in the longitudinal median plane Slot 11 extends the entire length of the clamp body 3 and goes through from the rounded top 12 to the bore 10.

A bolt made of a material that is a good electrical conductor and can be pressed, for example copper, is used as a The whole is designated by 15. The bolt 15 has an ab-

cut in the form of a pin 16, the length Cr, the axial length of the bore 10 and the diameter of which is adapted to the diameter of the bore 10. To improve the Kentaktes, the pin 16 is provided with a longitudinal corrugation 17 on its surface. A section 18 with a larger diameter adjoins the pin 16. The outer diameter is determined by the inner diameter of a central blind hole 19 of this section, which penetrates from the end face facing away from the pin 16 into the section 18 and is adapted in diameter to the outer diameter of the feed conductor 1, one end of which is inserted into the blind hole 19 and is then pressed by means of several pressing points 20 in section 18.

When installing the contact wire feed terminal, the feed conductor 1 either already delivered with the pressed-on bolt 15 to the assembly point, or one connects the Feed ladder with bolt 15 on the ground. As a result, the assembly work is compared to pre-pressing in the catenary structure Simplified. The pin 16 is then up to the stop the annular shoulder 21 formed at the transition from section 18 to pin 16 on one end face of the clamp body 3 inserted into the bore 10. This insertion can take place before or after the clamp body 3 has been placed on the grooved contact wire 2 take place. Finally, the clamp body 3 is pressed, whereby the projections 5 at the same time with the for a good contact required force in the grooves of the grooved contact wire 2 and the pin 16 with the Force required for a good contact is clamped in the bore 15. The longitudinal corrugation 17 digs when Press the clamp body slightly into the lateral surface of the bore 10, thereby improving the contact.

If the grooved contact wire 2, for example due to wear, has to be replaced by a new contact wire, the terminal is placed in a first Lüäevcrkzeug that with one of the two legs 7 with a cutting tool one from the flat surface 8 to the surface forming the transition between the groove base and the projection 5 cut off the going cut. The position of this section is indicated in FIG. 2 by the dash-dotted lines 22. The clamp body 3 can be removed from the grooved contact wire 2 after this cut. Now by means of a second loosening tool a section from the base of the groove 4 out to the bore 10. The location of this cut is indicated in FIG. 2 by the dash-dotted lines 23. Because of the slot 11 falls after this cut the clamp body 3 is divided into two parts, whereby the pin 16 is released.

After the new contact wire has been laid, the bolt 15 can be returned to its original position with the aid of a new clamp body Way to be connected to the terminal body and thus also to the contact wire. The new connection is the same as good and secure as the original connection, because the solid pin 16 has an at most insignificant V « undergoes formation. The length of the feed conductor remains the same as it is not when the terminal body is replaced needs to be separated from the bolt 10.

The second embodiment shown in FIGS. 5 and 6 of a ferrule for connecting a grooved contact wire 102 an electrical overhead line with a feed conductor 101, which consists of a highly flexible copper braid consists, has a clamp body 103, which has a through hole 110 running parallel to its longitudinal axis, which is used as a clamping channel for the pin 116 of one of the

the same way as the bolt 15 of the first embodiment formed bolt 115 is used, with which one Ends of the feed conductor is pressed.

In the wall delimiting the through-hole 110 to the outside there is a one in the longitudinal plane of symmetry of the clamp body 103 lying slot 111 is provided.

Over a circumference of the through hole 104 of approximately 270 ° If the wall thickness of the clamp body is essentially the same, which results from a constriction created by two in their The same shape, groove-like depressions 122 and 123 are formed which each have a V-shaped profile with an opening angle of slightly more than 90 °. The depressions but can also be omitted, which is indicated by the dashed lines 124 in FIG. 5.

As FIG. 5 shows, the constriction lies between the through hole 110 and, like this, a groove 104 lying symmetrically to the longitudinal center plane, which is used to accommodate the Head of the contact wire 102 is used and therefore extends über.die entire length of the terminal body as well as after the Through hole 104 facing away from the side is open. The groove base of the groove 108 is the curvature in the exemplary embodiment adapted to the contact wire head. A possible loosening of the clamp by cutting off one of the two delimiting the groove 104 Leg 107 is made easier, however, if the contact wire head is at a distance from the groove base, that is to say the groove has the shape indicated by the dash-dotted line 125 in FIG. 5. In this case, however, it is with Considering that the legs 107 are sufficiently thick, it is advisable not to provide any recesses 122 and 12 3.

In each of the flanks adjoining the groove base there is a groove 127 or 128 running in the longitudinal direction of the groove intended. When the clamp body 103 is on the contact wire

is placed, the grooves 127 and 128 together two channels with grooves in the contact wire.

The grooves 127 and 128 are used to receive legs a clasp designated as a whole with 129, which is made of an electrically good conductive compared to the material of the clamp body 103 is made of harder material. The clasp 129 is designed in the shape of a hairpin, but it is the two parallel, straight legs 130 connecting middle part 131 angled relative to the legs by about 45 °. In the exemplary embodiment, the central part 131 is designed in the shape of a circular ring, the ring diameter being somewhat larger than the distance between the two legs 130 from one another.

The legs 130 of the clasp replace the wedge-shaped, in the grooves of the contact wire engaging projections of the known ferrule. The penetration is therefore greater chosen as the depth of penetration into the grooves of the contact wire. In other words, this means that the legs 130 then when they are inserted into the grooves of the contact wire, they still protrude from them, and not in the exemplary embodiment completely on half of its size. The rest of the Circumference is received in the grooves 127 and 128 of the clamp body, as shown in FIG. 6, when the clamp body 103 is pushed over the legs 130 inserted into the grooves of the contact wire in their longitudinal direction.

The legs 130 of the clasp 129 are each provided with a thread over their entire length, which provides the mechanical holding force and the electrical connection between the terminal body 103 and the contact wire 102 is improved, since the threads dig into the grooves when grouting. In addition, the fact that the material of the clamp body when Crimping can penetrate into the threads of the legs 130, the risk that the contact wire will be bent, decreased even further.

For assembly, the clasp 129 is attached to the contact wire by the resilient legs 130, their spacing in the relaxed Condition is slightly smaller than the distance between the grooves of the contact wire from each other, slightly widened and then inserted into the grooves of the contact wire at the point where the clamp is to be attached The central part 131 of the clasp 129 allows the legs 130 to rest on the whole of the latter due to its angling Length in the contact wire grooves. The clamping force generated by the spreading of the legs 130 holds in connection with the Thread turns the clasp 129 securely in the selected location.

Now the clamp body 103 is placed next to the clasp 129 on the head of the contact wire 102 and then pushed in the longitudinal direction of the contact wire over the legs 130 of the clasp 123, as shown in FIG . 6 shows * The pin of the bolt 115, with which the feed conductor is pressed, can be inserted into the through-hole 110 before or afterwards. Since the legs 130 engage in the grooves 127 and 128 of the clamp body 103, the clamp body is securely fixed in the desired position (FIG. 5) when it is pressed.

During the pressing process, the threads of the legs 13O pressed into the grooves 127 and 128 of the clamp body 103 and, to a lesser extent, also into the grooves of the contact wire. Bending of the contact wire 102 cannot occur with the required pressing pressures.

The clamp is released as in the first embodiment, by first severing one of the two legs and then making a cut from the groove 104 to the Through hole 110 is performed.

722S803-e.ii.72

Claims (5)

: - ίο - claims for protection 1. Contact wire feed terminal for connecting a highly flexible feed conductor to a grooved contact wire, with a clamp body which can be closed by pressing and which is parallel to an open, the receptacle for the contact wire head serving channel is provided with a hole for the connection of the feed conductor, characterized by a bolt (15) made of a material that is a good electrical conductor and can be pressed, one end portion of which (18) has an axial bore (19) in which the feed conductor (1) is pressed by pressing this end section can be clamped, and its other end portion than one in the bore (10) of the clamp body (3) can be clamped Pin (16) is formed, and through a slot (11) in the clamp body (3) on the channel (4) facing away Side, which ScL ^ ·? extending over the entire length of the Clamp body extends and goes through to the bore (10). 2. Contact wire feed terminal according to claim l ^v , characterized in that the lateral surface of the pin (16) is provided with a Längriffeiung (17). 3. Contact wire feed terminal according to claim 1 or 2, characterized in that the pin (16) is one of the dimensions of the Clamp body (3) has a corresponding length in the axial direction and the bolt (15) at the transition to the pin (16) has an annular shoulder (21) which can be placed against the clamp body (3). Iw - 11 - ^L 4. Clamp according to one of claims 1 to 3, "characterized by a hairpin-shaped clasp (129) made of an electrically good conductive compared to the material of the Kleiumenkörpers (103) harder material, the parallel, threaded legs (130) under slight Spreading can be inserted into the grooves of the contact wire (102) and have a diameter which is greater than the depth of penetration of the legs (130) into the grooves. 5. ferrule nar: h claim 4, characterized gekennselehnet, that in the flanks of the groove (104) each one of the legs (130) of the clasp extending in the longitudinal direction of the groove (129) receiving groove (127,128) is provided. 722U03-IH.7J