JPS58112277A - Cable connecting element - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The invention relates to a cable connection element of the type specified in the preamble of claim 1.

Cable connection elements of this type, which are permanently or pluggably connected to electrical devices, serve to removably electrically connect the electrical connection points of these devices to the individual conductors of the electrical cable.

Most commercially available cable connection elements of this type are equipped with screw terminals, into which the individual cores of the electrical cable must be inserted one after the other and firmly tightened (German Patent Application No. 2 448 111). This is quite complicated and time consuming, especially in the case of control cables with a 71% smaller wire cross section. For this reason, instead of screw terminals, so-called spring force terminals are already being used, but they are only suitable for control cables with flexible wires. teeth.

It is proposed to use so-called tapping terminals instead of screw terminals, into which the individual cable cores are pushed and tightened by the elasticity of the core material. This can lead to errors in the work. It is always necessary to push each individual conductor into its corresponding terminal. This pushing operation must be done evenly from both sides, especially for wires with a small cross-section. For cables that require special skills and special tools.

The basic aim of the invention is to take advantage of the principle advantages of tapping terminal connections and to minimize the time consumption for connecting cables in connection elements with multiple electrodes without compromising operational safety. The goal is to simplify the process so that it can be reduced to a minimum.

This object is achieved by the invention set forth in claim 1.

By doing this, it is possible to insert the cable core wire into the corresponding tapping terminal without using a special tool, and at the same time, the tension buffering effect of the cable and the confinement of the connector against the intrusion of dust and moisture can be achieved. It can be done in a single work step due to the action.

Preferred developments and embodiments are disclosed in claim 2.
It is written j- after the section.

Next, embodiments of the present invention will be described in more detail with reference to the drawings.

The cylindrical cable connection element shown in FIG. It consists of a leaf-shaped sleeve nut 3 of insulating material with a packing ring of material and a tension-reducing ring 4.

The sleeve nut 3 is in the form of a pod open on one side and dimensioned so that in the cut state a hollow space is created in which the support l is provided with a ring 4 for buffering and sealing the tension of the cable, which is completely Km long. Only the retracting side protrudes in the axial direction. The closed end face of the sleeve nut 3 opposite the support l is provided with a projection s5 which wraps around the sleeve nut 3 up to the hole 6 through which the cable 7 (FIG. 2) passes. The support 1 is connected to the device #t8 at the end opposite to the retraction side.
It is firmly coupled with h. Furthermore, the support l is provided symmetrically and extends in the axial direction from the end face on the retraction side to the end face on the device side, and is opened outward and has a tapping terminal 13, 14.
．． It has groove-like recesses 9, 10, 11, and 12 with a rectangular cross section for accommodating 15.18. This recess is
One wall surface on the diametrical surface and the wall surface of the recess extending parallel to the wall surface facing the wall surface are formed so as to be offset in the radial direction by the width of the tapping terminal. As shown in Fig. 8, the tapping terminals 13, 14, 15, and 16 electrically connected to the respective terminals of the device are arranged so that the sides of the tapping terminals extending at right angles to the tapping grooves are aligned with the axis according to the pitch of the screw. In cross-sections mutually offset in the direction, the support member 1 is provided at a center portion between the end face on the retraction side and the end face on the device side, so as to protrude into the threaded teeth at a distance from the top surface thereof, respectively. corresponding recesses 9, 10, 1
1 and 12. Recesses 9, 10, 11,
Cable core introduced on 12 @17.18, 19.20
In order to electrically connect the cables, the cable core in each recess is first placed on the fan-shaped outer edge of the tapping groove of the tapping terminal. The cable core placed in this manner is pushed into the tapping groove by the sleeve nut 3.

As can be seen from FIG. It is formed so that it rises almost to the height of the screw teeth. By doing this, when screwing in the sleeve nut 3, the cable cores 17, 18, 19, 20 placed on the end faces of the tapping terminals 13, 14, 15, 16 are placed in front of the respective tapping terminals. A certain screw pitch allows the screws to be pushed into the tapping grooves of the tapping terminals. At that time, in Figure 3, cable core +ii
! As illustrated in the cross-section at 18, two vectorially different forces arise in each cable core. By screwing in the sleeve nut 3, a tangential force pt due to friction and a radial force Pr perpendicular to this are generated. In order to ensure that the cable cores slide into the tapping groove without being sheared at the corners of the end faces of the corresponding tapping terminals, the resultant force pa must be small (or at least approximately directed in the direction of the tapping groove. and the tapping terminal is provided parallel to the diametrical axis together with the tapping groove, but with a radial offset of half the width of the recess in the direction of rotation of the sleeve nut. Ru.

The sleeve nut 4, which is provided in the hollow part on the pull side, cushions the tension of the cable 7 and protects the ingress of dust and moisture into the connecting element. When 3 is screwed in, the 2nd
As shown in the figure, the projection 5 of the sleeve nut 3 in the area of entry of the cable 7 is pressed against the surface of this projection and against the end face of the support /'1. In this way, the sleeve nut 3 is inserted into the groove of the support 1 on the device side, and is made of an elastic material.
It contacts the ring 21 in a dust-proof and moisture-proof manner.

In some cases, the cable core 17. 18.19゜2
0 are crossed after the exit from the cable 7 into the recess 9,
10, 11, and 12, the partition wall of the recess is provided axially offset by a suitable dimension toward the device with respect to the end face of the support 1 on the retraction side, and thus A free space for one cross-laying installation of the cable core is created inside the support so that the ends of the cable sheathing are aligned approximately flush with the end face of the support, resulting in a space for buffering tension. It is not necessary to expand axially by special means.

Additionally, the four illustrated recesses 9. 10. 11. .

It is also possible to adapt 12 to the desired number of cores. The cable connection element according to the invention can also be used as an intervening cable connection device for connecting two cable ends or as a cable connection device for connecting two cable ends.
It is also possible to form two cables as a T-piece to connect one device.

The use of screws with a rectangular cross section has been found to be effective. The use of other thread cross-sections may be necessary and possible without detracting from the principles of the invention.

A cable connection element similar to that shown in FIG. It is formed of a leaf-shaped sleeve nut 3 with an internal thread and both depressions 24 of elastic material. The sleeve nut 3, as already described, is open on one side and assumes the shape of a telescope, and in the screwed-in state completely covers the support 22, so as to provide a suppressor 24 in place of the ring 4 (FIG. 1). The retraction side protrudes in the axial direction by a dimension that creates a hollow portion. Like the sleeve nut hole, the end face thereof is provided with a protrusion 6 that wraps up to the hole 6 through which the cable 7 passes (FIGS. 2 and 5). At the end opposite the retraction side, the support 22 is connected to the device 8.
is tightly coupled with. Further, the support body 22 is provided symmetrically and extends in the axial direction from the end face on the retraction side to the end face on the device side, and is opened toward the outside, and the tapping terminals 2B, 2
9.30 is provided with groove-shaped recesses 25, 26, and 27 having a rectangular cross section.

These recesses are coaxially symmetrically provided in the support body 22. As shown in FIG. 5, the tapping terminals 28, 29, and 30 electrically connected to the respective device terminals are connected so that the sides of the tapping terminals extending perpendicularly to the tapping grooves are connected to the retractable side of the support body 22. Approximately at the center of the side end surface and the device side end, corresponding recesses 25 and 26 are formed so as to extend radially outward away from the screw bottom.
．． It is located in 27. The pressing body 24 is formed into a ring shape so that its outer diameter is substantially equal to the inner diameter of the sleeve nut 3, and the inner diameter of the suppressing body is substantially equal to the outer diameter of the cable 7 to be drawn. A pressing body 9 is provided at the end opposite to the support body 22. Therefore, after the sleeve nut 3 is screwed in, the elastic ring 31 is pushed by the inner wall portion having a conical shape toward the cable lead-in side. The suppressor is compressed to such an extent that it presses against the cable and exerts a tension-reducing effect. The suppressor 24 is provided with radially elastic fingers 82, 83, 84 towards the support.

The length of the finger is determined by the length of the finger when the pressing body 24 is in contact with the end surface of the support body 1.
29.80, in which case the ends of the fingers 82, 33, 84 are shaped so that they can be pressed elastically by a certain amount. For this purpose,
As shown in FIGS. 5 and 7, the thread of the sleeve nut 3 has an effective thread height approximately equal to the maximum diameter of the cable core, starting from the bottom of the thread tb and extending from the first thread at the device side end. It is formed to rise almost to the height of the screw teeth during the pitch. By twisting the sleeve nut 3 in this way, the tapping terminal 28,
As shown in FIG. 5, the cable cores 35 placed on the tapping terminals 28 move the cable cores placed on the end faces of the fingers 32 as the pressing body 24 moves. .33, 34 are moved radially on the axis of the support and are then pushed into their corresponding clamps. This final state is shown in FIG. In this case, the sleeve nut 3 also has an elastic O-ring 36 fitted to the support 22 on the device side. On the retraction side, the elasticity Q + IJ applied by the pressing body 24
It can be seen that the contact with the song 7 and thus the interior of the connecting element is protected against the ingress of dust and moisture. The special design of the suppressor 24 makes it possible to ensure that even highly flexible cable cores are pushed into the tapping groove by these fingers 32, 38, 34, so that even in this case an excellent electrical contact can be made. becomes. The suppressor 24, which is designed as a valuable synthetic resin component, therefore simultaneously acts as a tension buffer for the connected cable 7 and as a seal on the cable side of the connecting element.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention in an exploded state, FIG. 2 is a partially sectional side view showing the device IT shown in FIG. 1 in an assembled state, and FIG. 11-Ill
4 is a perspective view showing another embodiment of the present invention in an exploded state, FIG. 5 is a side sectional view showing the assembly process of the device shown in FIG. 4, and FIG. FIG. 7 is a side sectional view showing the device shown in FIG. 4 in an assembled state.

Claims (1)

[Scope of Claims] 1) The number of connection electrodes is equal to the number of terminals of the device, and the connection electrodes are firmly or insertably connected to the terminals of the device, and the cable side thereof is detachable from the corresponding cable core. Equipped with a tapping terminal for connecting to. In a cable connection element for electrically connecting a multicore electrical cable with an electrical device. a) a support (1, 22) of threaded design and provided with threads (2, 23) and a sleeve nut (3) equipped with a suitable thread for screwing into this support (1, 22); 11) The supports (1, 22) extend generally axially from the end face of the support toward the device, are provided coaxially, and are spatially separated from each other. Groove-shaped recesses (9° 10.11, 12, 25, 26.27) equal in number to the number of connection electrodes are provided for accommodating cable cores # (17, 18, 19, 20° 35), C ) The connection electrode is a tapping terminal (13, 14° 15.1
6.28, 29.30), and this tapping terminal has a support member (
1, 22) at the approximate center between the end face on the retraction side and the end on the device side, and facing outward in the radial direction up to the height of the screw teeth in the maximum case. (9°10.11, 12, 25, 26)
．． 27), and d) the wall of the sleeve nut (3) starts from the minimum value of the device side end and, over the screwing depth, the difference between the maximum value and the minimum value is at least equal to the diameter of the core wire. Volatilize in the screwing direction to the maximum value that is equal to θ).
35) to the tapping terminal (13,14゜15.16.2
8,29.80)O Means operated by sleeve nut (3)K for pushing into the corresponding tapping groove. A cable connection element characterized by: 2) The screw of the sleeve nut (3) is the cable core # (17).
, 18, 19, 201 compatible slot tapping terminal (1B,
14, 15, 16), this screw is provided for this purpose up to the device end of the sleeve nut (3), and moreover, this screw starts from the bottom of the screw and extends from the beginning in the screwing direction. The thread pitch, in between, is formed to rise to a height of the thread teeth at least equal to the diameter of the cable core, in which case the tapping terminal is formed. The sides extending perpendicularly to the tapping groove are axially offset from each other in accordance with the thread pitch, and are formed so as to separate from the top surface of the support (1) and protrude into the thread teeth. The groove has a radial direction that acts on the cable core in the upper part of the tapping groove of each tapping terminal (13, 14, 15, 16) when the sleeve nut is screwed in with respect to the direction of rotation of the sleeve nut (3). The cable connection according to claim 1, characterized in that the cable connection is provided at an angle such that the vector of the combined force (Pd) of the pressing force (Pr) and the tangential friction force (Pr) points in the direction of the tapping groove. 3) An elastic ring (4) surrounding the cable (7) is provided in a snap-fitting manner in the sleeve nut (3), which ring is screwed onto the support (1) when the sleeve nut (3) is screwed onto the support (1). and the protrusion (5) forming the end of the sleeve nut ensures that the ring (4) rests against the cable (7) and is pressed against the support (1) and the end in order to prevent slippage and moisture intrusion. 4) The wall between the recesses (9, 10, 11, 12) is connected to the cable core (17, 18). , 19, 20) in the axial direction with respect to the cable-side end surface of the support (1) by such a dimension that a free space for cross-laying is created and the cable sheathing is slightly in contact with the end surface of the support (1). The cable connection element according to any one of claims 1 to 3, characterized in that the cable connection element is set back in the lid mounting direction. 5) Cable core wire wotatsubing terminal of cable (7) (
28, 29, 80), the protrusion (5) of the sleeve nut (3,) and the end face of the support (22) A suppressor (24) is used which is fitted in the sleeve nut (3) between the sleeve nuts (8) and is provided with a ring surrounding the cable (7), the outer diameter of which is similar to the sleeve nut (8). The inner diameter is approximately equal to the inner diameter of the
The same number of elastic fingers (32° 38.84) extending in the direction of the tapping terminal as the number of elastic fingers (32° 38.84) that are arranged at equal angles and that can be fitted into the groove-shaped recesses (25, 26° 27) are connected to the suppressor (
The fingers are provided with a length that extends beyond the tapping terminals (, 28, 29, 30) when the fingers (24) are in contact with the end surface of the support (22), and the ends of the fingers are attached to the sleeve nuts (3).
2. The cable connection element according to claim 1, characterized in that the cable connection element is formed such that it is pushed into the tapping groove by its cylindrical conical inner surface by screwing the cable connection element. 6) When the sleeve nut (3) is screwed, the elastic ring (31) is fitted into the suppressor (24) by the conical protrusion (5) K provided on the retracting side.
Cable connection according to claim 5, characterized in that the pressure body (24) is pressed against the corner end of the pressure body (24) facing towards the protrusion in such a way that it does not get wet and moisture does not enter into the cape. element. 7) Groove-shaped recess (9, 10, 11, 12, 25° 28.
27) has a rectangular cross section, and its radial wall in the diametrical plane of the support (1) and the opposing wall of the recess are
7. A cable connection element according to claim 1, wherein the cable connection element extends parallel to the former and is radially offset by the width of the recess and at a distance. 8) The leaf-shaped sleeve nut (3) completely covers the support (1) in the tightly screwed state and is made of elastic material in an annular groove provided on the device side of the support (1).
Claim 8 Straddle #!, characterized in that it abuts against the ring (21°36) in a moisture-proof manner. Cable connection element according to clause 6.