DE7019911U - STRAIN RELIEF FOR CABLES. - Google Patents

Description

24/70 PLI Lu / Li

25.5.I97O

ROBERT BOSCH ELEKTRONIK GMBH Berlin and Stuttgart

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The innovation relates to a strain relief for through openings Cable to be routed to a wall of a housing or chassis, consisting of two screw-together clips made of insulating material, which are provided with recesses to accommodate the cable or cables and, when screwed together, the or pinch the cables between them.

In particular, high-frequency cables, but also other cables, are subject to this for various reasons in the installed state a more or less high tensile load. These tensile forces have an unfavorable effect on the attachment of the cable ends, for example in clamps. In the case of particularly high tensile loads, it can happen to tear the cables out of their terminals. There is therefore a great need for a backup in these cases on the other hand, that the clamps themselves are protected from the harmful tensile stresses.

In special cases, for example in the case of high-frequency cables passed through the housing or the chassis of a radio communication device, it is also necessary to pass the cables through corresponding openings provided in the housing wall in such a way that an inadmissibly high knee stress on the cable is reliably avoided.

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24/70 - 2 - PLI Lu / Li

May 23, 1970

The innovation has set itself the task of creating a space-saving, Easy-to-manufacture and easy-to-assemble strain relief that also serves as the cable feed-through The openings in a housing wall or a chassis wall are used in such a way that excessive kinking loads are exerted on the cables to be avoided with certainty.

The new strain relief is characterized by that at least one of the two clamping pieces has at least one lateral extension with surfaces perpendicular to the cable direction and a through hole running in Kabelriohtung for a Has fastening screw for fastening the clamping pieces to the Düröhführüngäwand of the housing or chassis.

Appropriately, z. B. each of the two clamping pieces at least a lateral approach, with the approaches screwed together State of the clamping pieces lie on top of each other in such a way that the through holes of two superimposed Approaches a fastening screw can be pushed through.

The two clamping pieces can be the same molded parts, which after turning one molded part by 180 ° around one to the cable direction horizontal axis can be screwed together. Since there is only a single molded part for the two clamping pieces for the strain relief is needed, the production is particularly simple and cheap «

In one embodiment, according to the innovation, each clamping piece has a lateral approach on both sides, the approach on one side against the approach on the other side around the

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May 25, 1970 Thickness of the neck - 5 - to record the where the lateral approaches in Cable orientation Cable loading about those with the provided clamping surface of the clamping piece et! now th recesses

are extended beyond.

To avoid excessive kinking stress on the cables avoid the recesses in the direction of the cable over the Clamping piece protruding and kink protection surfaces that can be cut through the openings in the duct wall

Further details and features of the innovation emerge from an embodiment shown in the drawing and described in more detail below. Show it:

1 shows a perspective view of the two clamping pieces of the strain relief according to the invention,

Pig. 2 is a perspective partial view of an apparatus chassis with three feed cables, which are shown in the invention according to the invention

Bracket are jammed,

3 is a front perspective view of an outer wall of a Housing with cables passed through and clamped between kink protection surfaces of the bracket,

Flg. 4 is a rear perspective view of an outer wall of a Housing with a strain relief screwed to this and provided with cables.

In Fig. 1, 1 and 2 denote the two gill pieces of the strain relief according to the innovation. The clamping piece 1 has three recesses

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2V70 - 4 - PL ₁ m / ti

25.5.I97O

The two recesses on the left in the drawing for receiving a cable with a smaller diameter 25 * 26 (FIG. 2), for example a leather tension cable, and the recess on the right in the drawing for receiving a cable with a larger diameter 27, for example a high frequency cable are provided. Each of the two clamping elements 1 and 2 has two lateral lugs 3, K and 5, 6, the lugs 3, 5 and 4, 6 in the screwed-together state of the clamping elements 1, 2 lying one on top of the other through the through-hole holes 1, 9 and 8, 10 of two lugs 3, 5 or 4 _# 6 lying one on top of the other, one fastening screw 11 or 12, respectively, is durohsteokbar ISt _x , so that the screwing direction is in the cable direction.

According to the innovation, the example shown in the drawing has on both sides, 1 the clamping piece ^ 1 and 2 one each Approach 3, 4 or 5, 6, with each bad * the one with d «n for inclusion the cables 25 »26, 27 specific recesses 13 and 14, respectively provided clamping surface 19 of the clamping pieces 1 or «2 is also extended.

In the exemplary embodiment according to the innovation, the recesses 13 and 14 are provided with V-shaped protective surfaces 15 and 16, respectively, protruding in the cable direction over the clamping elements 1 and 2 and slidable through the openings in the passage wall 20 (FIG. 3).

The installation of the new strain relief can be carried out in a very simple manner. First, the components of the

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24 / ΓΟ - 5 - PLI Lu / Li

May 25, 1970

21 «22 of the chassis 23 hanging cables 24« 25 «26 fixed in the bracket« inde * £ Ή? two clamping pieces 1 '2 are slipped over the cables so' that those in the Ausnehmui ^- w 13 come to lie. Then the two clamping pieces 1, 2 are screwed together by means of a screw 18 inserted through bores 17 guided perpendicular to the cable direction and to the clamping surface 19 The holder with the cables 24, 25, 26 is now inserted through corresponding openings in the housing wall 20 (Fig. 3) and screwed tightly to the rear side of the housing wall 20 by means of the screws 11 and 12 (FIG. 4). Since the mounting screws 11 and 12 are guided parallel to the direction of the cable as a result of the special shape of the holder according to the above description, the holder can be made very narrow and therefore space-saving.

Claims (1)

24/70 - 1 - PLI Lu / Li 25.5.I97O Shooter sprays 1. ^ ö.>, Load for cables to be routed through openings in a wall of a housing ^r <ier chassis, consisting of two screw-together clamping pieces made of insulating material, which are provided with recesses to accommodate the cable or cables and are screwed together: State of clamping the cable or cables between them, characterized in that at least one of the two clamping pieces (1, 2) has at least one lateral extension (3, 4, 5, 6) with surfaces perpendicular to the cable direction (24, 25, 26) and a through hole (7, 8, 9, 10) running in the direction of the cable for a fastening tube (11, 12) for fastening the clamping piece (1 «2) to the DurohfUhrungswand (20) of the housing or chassis. 2. Strain relief according to claim 1, characterized in that «that each of the two clamping pieces (1, 2) has at least one lateral attachment (5, 4 and 5 "6)," whereby the attachments in screwed together state of the clamping pieces (1, 2) lie on top of each other in such a way that through the through holes (7 »9 or 8, 10) two consecutive approaches (j $, 5 or 4 «6) a fastening screw (11 or 12) can be pushed through 5. Strain relief according to claim 2, characterized in that Both clamping pieces (1, 2) are the same molded parts, which can be screwed together after turning one molded part by 160 ° around an axis lying in the direction of the cable. 24/70 - 2 - 4. Strain relief according to claim 3, characterized in that daduroh Each clamping piece (1, 2) on both Rarely one on each side Approach (5 * 4 and 5 # o) hä &, where the Ansats (5) ta änr öinön Side against the shoulder (4) on the other side did dl · the thickness of the shoulder (3, 4) is offset in the direction of the cable. 5 · Strain relief according to one of claims 1 to 4, daduroh marked, that there are lateral approaches (3, 4 and 5 * 6) via the with the to accommodate the cables (25, 26, 27) L, correct recesses (13 * 14) provided clamping surface (19) of the clamping piece (1, 2) are also extended. 6. Strain relief according to one of the claims «α to 5» thereby characterized in that the recesses (13, 14) protrude and duroh in the cable direction over the clamping piece (1, 2) the openings in the leadthrough wall (20) can be pushed Kink protection surfaces (15, l6) are provided. 7 «Strain relief according to claim 6, characterized in that it is marked, dafi the kink protection surfaces (15, 16) on each clamping piece (1, 2) are designed in the manner of V-shaped channels. 8. Strain relief according to one of claims 1 to 7 * daduroh marked because & the recesses (13, 14) are of different sizes. 9 · Strain relief according to one of claims 1 to 8, characterized in that the two clamping pieces (1, 2) by means of a through the clamps perpendicular to the cable direction and to the Clamping surface (19) of the two clamping stttoke guided bores (17) The hand-screwed 8-octagonal screw (18) can be screwed together 701391117.9.70