JPS6018105B2 - cable connection element - Google Patents

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 pluggably connected to electrical devices, serve to removably electrically connect the electrical connection points of these devices with 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 small core cross-sections. For this reason, instead of screw terminals, so-called spring-force terminals are already being used, but these are only suitable to a limited extent for control cables with flexible strands. Furthermore, in this regard, it is known to use so-called self-tapping terminals instead of screw terminals, into which the individual cable cores are pushed and tightened by the elasticity of the core material. In this case, it is easy to make mistakes in tightening the screws of individual terminals. It is always necessary to push the individual conductors into their respective terminals. Since this pushing operation must be performed uniformly from both sides, special skills or special tools are required, especially in the case of cables with small core cross-sections. 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.

In this way, the cable core can be inserted into the corresponding tapping terminal without the use of special tools, and at the same time the tension of the cable can be buffered and the connecting element can be sealed against the ingress of dust and moisture. can be done in a single work process under

Preferred developments and embodiments are disclosed in claim 2.
It is listed in the section ``Pantheft''.

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 sheath-shaped sleeve nut 3 of insulating material with a packing ring of material and a tension damping ring 4.

The sleeve nut 3 is in the form of a sheath open on one side and is dimensioned such that in the cut state a hollow space is created which completely covers the support 1 and provides a ring 4 for cable tension damping and sealing. Only the retracting side protrudes in the serpentine direction. The closed end face of the sleeve nut 3 opposite the support 1 is provided with a projection 5 which wraps around the sleeve nut 3 up to the hole 6 through which the cable 7 (FIG. 2) passes. The support 1 is rigidly connected to the device 8 at its end facing the draw-in side. Further, the support body 1 extends axially from the end face on the retraction side to the fabric part on the device side, is provided symmetrically, and is opened outward, and has tapping terminals 13, 14,
15 and 16, groove-shaped recesses 9 and 10 having a rectangular cross section, and hooks 1 and 2 are provided. This recess is formed so that one wall surface on the diametrical surface and the wall surface of the recess extending parallel to the wall surface facing this are always offset in the radial direction by the evening terminal width. has been done. As shown in Fig. 3, the tapping terminals 13, 14, 15, and 16 electrically connected to the respective terminals of the device are arranged such that the arms of the tapping terminals extending at right angles to the tapping grooves correspond to the pitch of the screw. The cross-sections are mutually offset in all directions of the axis, and protrude into the threaded teeth at a distance from the top surface of the support body 1 at the center between the end surface on the retraction side and the end on the device side. Respective corresponding recesses 9.10, 11, 1
It is set in 2. In order to electrically connect the cable cores 17, 18, 19, and 20 introduced into the recesses 9, 10, 11, and 12, the cable cores in each recess are first expanded into a fan shape in the tapping groove of the tapping terminal. It is placed on the outer edge of the ivy. The operation of pushing the cable core wires stacked in this way into the tapping groove is performed by the sleeve nut 3. For this reason, this thread has an effective thread height approximately equal to the maximum diameter of the cable core at the device end, starting from the thread base and between the first thread pitch, as can be seen in Figure 2. It is formed to rise to the height of the underside screw teeth. By doing this, when screwing the sleeve nut 3, the tapping terminals 13, 1
Cable core wires 17, 1 placed on the end faces of 4, 15, 16
8, 19, and 20 are mutually pushed into the tapping grooves of the tapping terminals by the screw pitches at the front and rear of the respective tapping terminals. At this time, two vectorially different forces are generated on each cable D line, as shown in the cross section of the cable core 18 in FIG. By screwing in the sleeve nut 3, a force Pt in the tangential direction due to the dust and a radial force Pr in the direction perpendicular to this are generated. In order to ensure that the cable cores slide into the tapping groove without being cut off by the corners of the end faces of the corresponding tapping terminals, the resultant force Pd must be directed at least approximately in the direction of the tapping groove. This is achieved by ensuring that the recess and the tapping terminal are provided parallel to the diametrical axis together with the tapping groove and radially offset by half the width of the recess in the direction of rotation of the sleeve nut. easily achieved. A packing 4 is provided in the hollow part on the cable side of the sleeve nut in order to buffer the tension of the cable 7 and protect the ingress of dust and moisture into the connecting element. In the open state, as shown in FIG. 2, the cable 7 is pressed by the protrusion 5 of the sleeve nut 3 in the area of entry against the surface of this protrusion and against the end face of the support 1.

In this way, the sleeve nut 3 is made of an elastic material which is iron-plated in the groove of the support 1 on the device side.
- Contacts the ring 21 in a dust-proof and moisture-proof manner. In some cases, the cable cores 17, 18, 19, 20 are crossed after exiting from the cable 7 to form recesses 9, 10, 11,
12, the partition wall of the recess is axially offset from the end face of the support 1 on the lead-in side by a suitable dimension toward the device, so that the cable core can be introduced into the device. A free space for "cross-laying" is created inside the support so that the ends of the cable sheathing lie approximately flush with the end faces of the support, so that the space for tension damping is created by special means. Therefore, there is no need to expand in the direction of the ball.

It is also possible to adapt the four illustrated recesses 9, 10, 11, 12 to a desired number of core wires.

The cable connection element according to the invention can also be designed as a cable connection device for connecting two cable ends or as a T-part for connecting two cables with 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 the above, shown in FIG.
It is formed of a sheath-like sleeve nut 3 with an internal thread suitable for screwing into the support 22 and a pressing body 24 of elastic material provided between both.

The sleeve nut 3 has the shape of a sheath open on one side as already described, completely covering the support 22 in the screwed state and providing a pressure body 24 instead of the ring 4 (FIG. 1). The retraction side protrudes in the axial direction by a dimension that creates a hollow portion. The sleeve nut is likewise provided on its end face with a projection 5 which wraps up to the hole 6 through which the cable 7 passes (FIGS. 2 and 5). The support 22 is rigidly connected to the device 8 at its end facing the retraction side. Further, the support body 22 has a rectangular cross section extending symmetrically from the end face on the draw-in side to the end face on the bag counterfeit side in a symmetrical manner, opening outward, and accommodating the tapping terminals 28, 29, and 30. It is provided with groove-shaped recesses 25, 26, and 27. 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 arranged so that the arms of the tapping terminals extending perpendicularly to the tapping grooves are connected to the retracting side end surface of the support body 22. and the device side end, the respective corresponding recesses 25, 26 extend radially outward away from the screw bottom.
, 27. The pressing body 24 is formed into a ring shape so that its outer diameter is approximately equal to the inner diameter of the sleeve nut 3, and the inside diameter of the pressing body is approximately equal to the outer diameter of the cable 7 to be drawn. A pressing body is provided at the end opposite to the support body 22, so that after the sleeve nut 3 has been screwed in, the elastic ring 31 is pressed onto the cable by the inner wall that has a conical shape toward the cable lead-in side. The pressing member is compressed by a size that allows it to press against the member and to provide a tension buffering effect. The pressing body 24 is provided with fingers 32, 33, and 34 having elasticity in the radial direction toward the support body, and the length of the fingers is such that when the pressing body 24 is in contact with the end surface of the support body 1, the fingers are Ping terminal 28, 2
In this case, the ends of the fingers 32, 33, 34 are formed so that they can be elastically pressed by a certain amount. For this purpose, the thread of the sleeve nut 3 has an effective thread height approximately equal to the large diameter of the cable core, as shown in FIGS. 5 and 7, from the thread bottom at the device end. It is formed so that it begins and rises almost to the height of the thread teeth during the first thread pitch. By doing this, when screwing the sleeve nut 3, the tapping terminals 28, 29
, 30, as shown in FIG. 33, 34, it is moved radially on the axis of the carrier and is then pushed into its corresponding clamp. This final state is shown in FIG. In addition, in this case, the sleeve nut 3 contacts the elastic O-ring 36 pressed against the support body 22 on the device side, and the elastic O-ring 37 compressed on the pressing body 24 on the retraction side, thus making the connection. It can be seen that the interior of the element is protected against the ingress of dust and moisture. Due to the special configuration of the pressing body 24, even highly flexible cable cores can be pushed into the tapping grooves without fail by the fingers 32, 33, 34, so that even in this case it is possible to make an excellent electrical contact. becomes. Therefore, the pressing body 24, which is formed as a valuable synthetic resin part,
At the same time, it provides a tension buffering effect on the connected cable 7 and a sealing effect on the cable side of the connecting element.

[Brief explanation of the drawing]

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 shown in FIG. 1 in an assembled state, and FIG. 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; FIG. is a sectional view taken along the line W- in FIG. 5, and FIG. 7 is a side sectional view showing the apparatus shown in FIG. 4 in an assembled state. DESCRIPTION OF SYMBOLS 1... Support body, 2... Rectangular screw, 3... Sleeve nut, 4... Tension buffer ring, 5... Protrusion part, 6
... Hole, 7... Cable, 8... Device, 9, 10, 1
DESCRIPTION OF SYMBOLS 1, 12... Recessed part, 13, 14, 15, 16... Tapping terminal, 17, 18, 19, 30... Cable core wire, 21... O-ring, 2... Support body, 23...・・・
Screw, 24... Pressing body, 25, 26, 27... Recess, 28, 29, 30... Tapping terminal, 32, 33
, 34... finger, 35... cable core, 3
6,37.・○− ring. FIGI FIG2 FIG3 FIG7 FIGMu FIG5 FIG6

Claims (1)

[Scope of Claims] 1. The device is equipped with a number of connection electrodes equal to the number of terminals of the device, and the connection electrodes are pluggably connected to the terminals of the device, and the cable side thereof is detachably connected to the corresponding cable core wire. A cable connection element for electrically connecting a multi-core electrical cable with an electrical device, which is provided with tapping terminals, comprising: (a) a screw-shaped support 1, 22 with screws 2, 23; a sleeve nut 3 with a suitable thread for screwing into the supports 1, 22; b) the supports 1, 22 are provided coaxially and coaxially extending in a general direction from the end face of the support toward the device side; Groove-shaped recesses 9, 10, 11 of the same number as the number of connection electrodes, which are spatially isolated.
, 12, 25, 26, 27 are cable core wires 17, 18,
19, 20, 35;
29, 30, and this tapping terminal has an arm extending perpendicularly to the tapping groove at approximately the center between the end surface on the retraction side and the end on the apparatus side of the supports 1, 22, and in the maximum case, the tapping terminal has a screw tooth. pointing radially outward to a height of
Corresponding recesses 9, 1011, 1 of supports 1, 22, respectively
2, 25, 26, 27, d The wall thickness of the sleeve nut 3 starts from the minimum value at the end on the device side, and over the screwing depth, the difference between the maximum value and the minimum value is at least as large as the core wire. increases in the screwing direction to a maximum value equal to the diameter, and e This is the cable core 17, 18, 19, 20, 3
5 to tapping terminals 13, 14, 15, 16, 28, 2
Cable connection element, characterized in that it is a means operated by a sleeve nut 3 for pushing into a corresponding tapping groove of 930. 2 The screws of the sleeve nut 3 connect the cable core wires 17 and 18.
, 19, 20 to the corresponding tapping terminals 13, 14, 1
5, 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 first screw pitch in the screwing direction. The tapping terminal is formed so that the height of the threaded teeth is at least equal to the diameter of the cable core, and in that case, the tapping terminal has arms extending perpendicularly to the tapping groove and axially offset from each other in correspondence with the threaded pitch. The clamp groove is formed so as to be separated from the top surface of the support 1 and protrude into the threaded teeth, and the clamp groove is formed so as to separate from the top surface of the support 1 and protrude into the threaded teeth. , 14, 15, 16, the resultant force P_ of the radial pressing force P_r and the tangential friction force P_t acting on the cable core at the upper edge of the tapping grooves P_
Cable connection element according to claim 1, characterized in that the vector d is provided at an angle such that it points in the direction of the tapping groove. 3. An elastic ring 4 surrounding the cable 7 is snap-fitably provided in the sleeve nut 3, which ring is engaged by a projection 5 forming the end face of the sleeve nut when the sleeve nut 3 is firmly screwed into the support 1. The cable connection according to claim 1 or 2, characterized in that the ring 4 is pressed against the end face of the support 1 in contact with the cable 7 to prevent the ring 4 from slipping and to prevent moisture from entering. element. 4. The walls between the recesses 9, 10, 11, 12 are formed so that a free space for cross-laying the cable core wires 17, 18, 19, 20 is created, and the cable sheathing is slightly separated from the end surface of the support 1. 4. The cable connection element according to claim 1, wherein the cable connection element is set back in the axial device direction with respect to the cable-side end surface of the support body 1 by a dimension. 5 Connect the cable core of cable 7 to tapping terminal 28,
As a means operated by the sleeve nut 3 for pushing into the corresponding tapping grooves 29 and 30, the sleeve nut 3 is provided so as to be able to be fitted into the sleeve nut 3 between the protrusion 5 of the sleeve nut 3 and the end face of the support 22. Pressing body 24
This pressing body is provided with a ring surrounding the cable 7, the outer diameter of this ring is made approximately equal to the inner diameter of the sleeve nut 3, and tapping terminals 28, 2 are provided on the outside of the ring.
Elastic fingers 32, 33, 34, the same in number as 9, 30, extend in the direction of the tapping terminals, are equiangular, and can be fitted into the groove-like recesses 25, 26, 27, press the pressing body 24 onto the end face of the support body 22. Tapping terminal 2 while touching
8, 29, 30 in length, and the end of the finger is formed to be pushed into the tapping groove by its conical inner surface by screwing the sleeve nut 3. Claim 1:
Cable connection elements as described in section. 6 By screwing the sleeve nut 3,
An elastic ring 31 fitted into the pressing body 24 by the conical protrusion 5 provided on the retracting side is attached to the pinnate end of the pressing body 24 facing toward the protrusion so that it does not slip and is attached to the cable. The cable connection element according to claim 5, characterized in that it is pressed to prevent moisture from entering. 7 Groove-shaped recesses 9, 10, 11, 12, 25, 26, 2
7 has a rectangular cross section, and its radial wall in the diametrical plane of the support 1 and the opposing wall of the recess extend parallel to the former and are at a distance offset in the radial direction by the width of the recess. A cable connection element according to any one of claims 1 to 6. 8 The sheath-like sleeve nut 3 completely covers the support 1 in the tightly screwed state and is fitted with an O-ring 21, 3 made of elastic material in an annular groove provided on the device side of the support 1.
7. The cable connection element according to claim 3 or 6, characterized in that it abuts moisture-proofly on the cable connection element 6.