DE8531182U1 - Device for fastening flexible lines, in particular Bowden cables - Google Patents

Description

GBM November 4th, 1985

Device for fastening flexible lines, in particular Bowden cables

The innovation concerns: 'a device for attaching flexible lines, in particular Bowden cables, '. consisting of a rigid attachment part with a

Transverse to a fastening screw running passage for the line and one with the fastening part connected flexible tubular guide as bending protection for the line.

It is known to design the fastening part as a kind of clamp • to which a helix is attached as a bend-ί the same tubular guide that prevents

that the flexible line passed through, e.g. a Bowden cable, is deflected too sharply, which leads to damage the line, a bowden cable that is bent too far is impaired in its function, because then the wire core would hardly be able to move because of too much internal friction.

The problem of a kink-proof fastening of flexible lines is particularly relevant when the line must be attached in the area of the joint of a rod, e.g. the joint between a divided, Foldable handlebar for handling and guiding a mobile garden tool.

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The flexible elastic guide of the known attachment devices of the type described is subject to a certain resistance to bending, such as B * _s a Schraübenwendel j

made of spring steel wire. Since the bend of the guide is always |

must be brought about by the deflection of the passed line itself § / this is jammed or squeezed _{in an undesirable manner S 1.} It is therefore the task of the innovation, | an elastic flexible guide for a fastening | Aft to provide apparatus of the described which is easy to bend While I, but still prevents kinking of the conducted line. | '

The solution to this problem is, according to the innovation, that the tubular made of elastic plastic Guide along its length a plurality of slot-like transverse recesses reaching up to residual cross-sections of the pipe wall having. Since the slot-like transverse recesses partially interrupt the pipe wall at intervals the full pipe cross-sections remaining between two transverse recesses in the event of a forced bend the guide is no longer deformed. Only the remaining cross-sections of the remaining in the plane of the transverse recesses Pipe walls are subject to a bend, and | relatively small forces to deform these residual cross-sections. The sub-task of preventing kinking of a line passed through the guide is carried out by solved the fact that from a certain bending radius, with your the full pipe cross-sections bridging the Transverse recesses abut on the edge, the required bending force increases by leaps and bounds, depending on the choice the width and the number of transverse recesses it is up to you to determine this minimum bending radius, beyond which the lead through should not be bent.

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When the slot-like transverse openings are arranged in pairs diametrically remain between each pair be ^e riachbarten full tube cross sections each have two diametrical Restquersöhnitte. The aim of this embodiment of the innovation is that the guide can be easily bent to a limited extent only in one plane.

In a further development of the subject of the innovation, it is proposed that that the fastening part and the tubular guide are made from a single plastic injection-molded part exist,,

In the drawing is an embodiment of a fastening device shown according to the innovation, namely show:

1 shows a simplified exploded view of the device in its entirety,

Fig. 2 is a side view of the device mounted on a split spar of a Lawn mower, and

FIG. 3 is a plan view of FIG. 2.

The fastening device according to the innovation consists in its entirety of a rigid fastening part 1, two laterally molded tubular guides 2 _f 3 as protection against bending, a fastening screw 4 and a plug 5 for closing the inner recess 1a of the fastening part 1. The fastening part 1 and the guides 2, 3 are a unitary injection molded part made of an elastic plastic. The guides 2 and 3 are shown in Fig. 1 for the sake of simplicity as uninterrupted tubes.

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In Fig. 2 you can see two spar parts 6 and 7 for guiding a lawnmower, which are in the recess 1a of the Fastening part 1 inserted fastening screw 4 ge are articulately connected. A rim nut 8 is used to clamp the spar parts and fix the fastening part 1. Through the tubular guides 2, 3 and a transverse to the fastening screw 4 Passage in the fastening part 1 is a Bowden cable 9 with Drahfoeolo 1Ω

The special design of the tubular guides 2,3 can best be seen from Fig. 3, in which the spar parts 6,7 are shown in the collapsed position in which the Bowden cable 9 is deflected from its plugged position according to FIG. The tubular elastic guides 2 and 3 represent a bending protection for the Bowden cable 9 so that it is not kinked too sharply _v So that the tubular guides 2, 3 can easily follow the forced deflection of the Bowden cable 9 up to a certain bending radius, but then one If the further bending oppose an abruptly increasing resistance, the guides 2, 3 have a plurality of vc-n slot-like transverse recesses 11 along their length, which in the exemplary embodiment are arranged in pairs diametrically and reach as far as diametrical residual cross-sections 12 of the pipe wall. Seen in the longitudinal direction, solid, uninterrupted pipe wall parts 13 are left between the slot-like transverse grooves 11, which are sufficient for guiding the Bowden cable 9 and are not subject to any deformation when it is deflected. In the event of a bend, only the diametrical residual cross-sections 12 are deformed, and this is relatively easy because they are weak in cross-section. However, if a minimum bending radius is reached beyond which the Bowden cable 9 should not be deflected, then

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butt the full Rohrwaindungs parts 13 on the edge side in the '"pressed fiber" of the bending cross-section together, and

I the sooner the narrower the transverse recesses 11 are.

In FIG. 3, the fastening part 1 is shown without the sealing plug 5. One recognizes in the inner recess 1a of the pot-like fastening part 1 the Bowden cable 9 pushed through _{transversely i, t and below it partly}

rt d & ckt a hexagonal recess on the bottom for rotating

t secure reception of the hexagon head 4a of the screw ^

II bolt 4. To also secure the screw bolt 4 axially, i; the stopper 5 has two eccentric, molded webs 5a, which extend to the hexagonal head 4a when the stopper iöt compressed into the recess 1a.

Claims (2)

Protection claims 1. Device for attaching flexible cables, especially Bowden cables ^, consisting of a rigid fastening part with a transverse passage to a fastening screw for di «line and one connected to the fastening part flexible tubular guide as bending protection for the line, characterized in that, that the tubular guide (2,3) made of elastic plastic on its Length of a majority of up to remaining cross-sections (12) J the pipe wall reaching slot-like transverse exit - exhibits (I ¹ ). 2. Apparatus according to claim 1, characterized in that the slot-like Transverse recesses (11) arranged in pairs diametrically are. 3 »Device according to claim 1 or 2, characterized. characterized that the fastening part (1) and the tubular guide (2,3) consist of a single plastic injection-molded part.