DE102008037208B4 - Cable sheath, cable with cable sheath - Google Patents

Abstract

Cable sheath for a cable (6), in particular a push-pull cable or an inclined cable, with an outer tube (8; 28) and arranged on an inner side (8.1; 28.1) of the outer tube (8; 28), predominantly in an axial direction Struts (10; 30; 40) extending in the direction of the outer tube (8; 28), the struts (10; 30; 40) extending essentially over the entire length of the cable sheath (4; 24; 34), several struts (10 ; 30; 40) are distributed in the circumferential direction on the inside (8.1; 28.1) of the outer tube (8; 28), and the webs (10; 30; 40) are formed in one piece with the outer tube (8; 28), characterized in that that the cable sheath (34) has such a slot (42) in the axial extension, which ensures lateral access to a cable (6) that can be guided in the cable sheath (34).

Description

Technical area

The invention relates to a cable sheath according to the preamble of claim 1 and a cable with a cable sheath. The cable sheath is designed for a mechanical forces transmitting cable, in particular a train-pressure cable or a pitch cable.

State of the art

Mechanical force transmitting cables such as pull-push cables or pitch cables are known in the art. The cables are used, inter alia, in motor vehicles for operating sunroofs or windows.

A cable sheath with the features of the preamble of claim 1 is for example from the FR 2729209 A1 known. This document discloses in particular a cable sheath for a cable with an outer tube and arranged on an inner side of the outer tube, extending in an axial direction of the outer tube webs, wherein the webs extend substantially over the entire length of the cable sheath, distributed a plurality of webs in the circumferential direction are arranged on the inside of the outer tube and the webs are integrally formed with the outer tube.

However, this known cable sheath is expensive to manufacture. There is also the problem of having such known cable sheaths for cables of different diameters.

Furthermore, the disclosure DE 10058241 A1 Damping elements for a Bowden sheath, in which the traction means is guided. These damping elements are intended in particular to avoid rattling or squeaking noises between the Bowden cover and the body parts of the motor vehicle. However, this document is not an inspiration to avoid by means of appropriate measures rattling between the guided in the Bowden cable and the Bowden sheath.

Another pitch cable is in the German patent DE 35 13 093 C2 which discloses a pitch cable having a wireline core and a helically wound wire thereabout. Such pitch cables are used to drive sunroofs in motor vehicles, the pitch cable takes over the role of a guided in a pipe flexible rack.

For such pitch cable is regularly provided for reasons of leadership of the cable and the susceptibility to fouling a cable sheath or a guide tube.

A disadvantage of such pitch cables with guide tube, however, is that the pitch cables tend to rattle in the guide tube. In particular, when used in automobiles, vibrations of, for example, the engine or the road are transmitted to the pitch cable and the pipe, whereby the pitch cable can strike in the pipe.

To improve the Klapperedigung is in the aforementioned document DE 35 13 093 C2 discloses that in the screw threads of the pitch angle of the pitch cable, a so-called flock thread is introduced, which fills the screw thread. This can already reduce the clatter inclination.

However, it has been shown in practice that the provision of a flock thread in the screw thread in extreme laying is not sufficient to achieve a satisfactory noise behavior. Such extreme displacements occur, for example, in the sunroof area in the curved laying areas of the pitch cable. In the loaded state, the pitch cable is pressed against the outer walls of the cable sheath, so that the flock thread has no buffer effect. This can lead to rattling under tensile or compressive load of the cable. Even if the cable is unloaded, the vibration behavior changes in strongly curved areas by spreading the flock threads, which increases the Klapperneigung.

In addition, it has proved problematic to apply flocking threads on the wires, as the wires are mixed with fats during manufacture. These fats must be largely removed to stick the flock thread. This increases the manufacturing effort and the risk of rejects. In addition, the flock threads may peel off in operation, which could lead to premature failure of the cables or to the early occurrence of rattling noises.

From the DE 302 15 33 a Bowden cable is known, with a pull wire, which is guided in a tube made of plastic material, which in turn is encased by means of a substantially formed by a wire spiral Bowdenzugmantels. The arranged between the puller wire and jacket plastic tube may be provided on its inner and / or outer surface with ribs having a rectangular or trapezoidal cross-section and having the guide surfaces or edges for the puller wire.

The disadvantage of this is that at least two sheaths must be provided for the wire, the plastic tube and its sheath. This structure is relatively expensive to install and expensive due to the majority of required components. In addition, the corresponding arrangement is relatively bulky and can not be used in all fields of application, especially not those in which a limited space is available. The Indian DE 302 15 33 Moreover, the structure disclosed leaves very little space for the formation of the ribs. The efficiency of the local system is therefore limited.

Another approach is in the DE 31 24 444 C2 discloses in which a longitudinally displaceable in a guide tube drive cable is disclosed in which between the guide tube and the drive cable attached to the drive cable elastically resilient, friction and noise-reducing intermediate layer is provided, which is formed of polymer foam.

A disadvantage is that the practical implementation of this teaching is problematic. Both the introduction of a uniform polymer foam layer between the pitch cable and the inner wall of the guide tube and a uniform flocking of the inner wall of the pipe require considerable technical effort, which also does not show the desired success with the necessary process reliability to form a uniform noise-reducing intermediate layer between pitch cable and pipe.

In addition, the local structure is heavily loaded in practice by the regularly curved laying of the guide tube. The necessary plasticizers for the polymer foam are lost over time and the polymer foam cures, especially under the often extreme conditions when used in motor vehicles, for example in the roof area. There, temperatures of over 60 ° C are easily reached in the summer. When the polymer foam layer has cured, it tends to dislodge upon movement of the pitch cable, which on the one hand can lead to blockage of the pitch cable and, on the other hand, can cause rattling noises. The cable must then be completely replaced.

Another problem that causes rattling of the cables is the attachment of the cable sheaths or leads in the motor vehicles. The cable sheaths often have only a slightly larger diameter than the cable guided in the cable sheath. Thus, in the transitional areas and in the end regions of the cable sheaths in the event of vibrations, the gradient cables strike, in particular in an unloaded state. Another reason for rattling noises is that distorted by tensile or compressive stress of the cable, the cable guide elements and thereby also tend to rattle.

task

The object of the invention is therefore to provide a cable sheath and a combination of cable sheath with cable, which is easy to manufacture and can be easily kept ready for different cable diameter.

Presentation of the invention

This object is achieved by a cable sheath according to claim 1 and by a combination of a cable with a cable sheath according to claim 10. Advantageous embodiments of the invention are the subject of the dependent claims.

The cable sheath according to the invention for a cable has an outer tube and webs arranged on an inner side of the outer tube and extending predominantly in an axial direction of the outer tube. The cable is in particular a cable which transmits mechanical forces, for example a pull-push cable or a pitch cable according to the previously cited cable DE 31 24 444 C2 , The cable may be flocked or unflocked. A flocked cable has even better noise insulation properties for particularly noisensitive uses and according to the invention can also be used further if the flocking were to detach over time. The outer tube forms in its interior a guide for a previously described cable. The webs arranged in the interior of the outer tube cause the cable to be brought into contact substantially with the webs and not with the remaining inner side of the outer tube. In addition, the webs cause the cable in the interior of the outer tube with respect to the longitudinal extent of the tube has a radial clearance, so that tensile and compressive loads of the cable, which usually lead in particular to bow forces radially to the arc, are collected within the cable sheath, without in that the cable sheath itself noticeably deforms. The webs have this with the usual choice of materials sufficient flexibility and thus still cause the cable does not run over long distances unguided within the cable sheath. A rattling can thus effectively prevent. Another effect is that the cable sheath has a larger diameter by the webs relative to the diameter of the cable to be led than the cable sheaths known in the prior art. This allows the cables in the connection areas further spaced lead from the brackets and thus effectively prevent hitting the cable. Furthermore, it is readily possible due to the large diameter of the cable sheaths, the cable sheath directly to the mounting units, z. As sliding roof modules to attach and guide, as thicker cable sheaths easier to insert into the brackets Grasp as thin cable sheaths. To elaborate holding devices or assembly process can thus be dispensed with. Also, it is possible by the inventive cable sheath that the cables can be mounted without bias, as a balance of cable play is made possible by the webs. In this case, the webs extend substantially over the entire length of the cable sheath. This ensures a uniform guidance of the cable to be guided over its entire length. Furthermore, the cable sheath according to the invention can then be produced as an endless product and cut to a required length. In addition, results in such continuous webs or continuous projections the advantage that the cable can not pinch in areas where no webs are provided. The clattering inclination is thus further reduced. Several webs distributed in the circumferential direction are arranged on the inside of the outer tube. This allows a particularly good guidance of the cable can be achieved and install the cable cover in any orientation. It can be provided between two webs and any number of webs. Preferably, the webs are arranged distributed uniformly over the circumference of the outer shell. Furthermore, the webs are formed integrally with the outer shell. In this way, the cable sheath according to the invention can be produced particularly inexpensively. In addition, the connection of the webs with the outer tube is particularly reliable. According to the invention it is provided that the cable sheath has a slot in axial extension. Such a slot increases the flexibility of the cable sheath. This makes it possible to lay tighter radii of curvature than without a slot. In addition, a slot in the cable sheath allows lateral access to a train-push cable runable therein.

According to a first embodiment, it is provided that the webs are formed protruding toward the interior of the outer tube. If the outer tube is radially symmetrical, ie cylindrical, the webs can be arranged in the direction of an axis of symmetry or of a small radius about this axis of symmetry. For non-radially symmetric cable sheaths, a centroid of a cross section through the cable sheath or a small area around the centroid is preferred.

If the webs extend radially to the interior of the outer tube, a particularly good guidance of the cable can be achieved, in particular if the cable has to transmit greater forces. The webs are in this case always parallel to forces that do not extend along the direction of extension of the cable sheath.

Alternatively it can be provided that the webs extend obliquely, ie at an angle to the radial direction, to the interior of the outer tube. Then forces that act on the cables on the webs, cushioned. This solution is particularly recommended for cables that do not have to transmit very high forces. By means of inclined webs can continue to achieve that the cable is not prone to tilting and pinched between the webs.

A further advantageous embodiment of the invention provides that the webs are formed profiled in cross section. The webs have according to this advantageous embodiment of the profile on a radial portion and a predominantly tangential portion. The webs thus form in cross-section preferably an L-shape or a T-shape. The predominantly tangential section is aligned towards the interior of the outer shell. With the help of such webs, the contact surface of the cable leading to the cable sheath can be increased and further reduce the clatter inclination. Furthermore, the risk of entrapment of the cable between the webs can be reduced in this way.

The tangential section preferably has one end in the radial direction of the cable sheath further to the central region of the outer tube than the radial section. In this way, a crooked L or a crooked T is formed, in which the predominantly tangential section extends obliquely to the tangent. Through the ends of the webs, a free diameter is determined within the outer shell, which is smaller than a diameter formed by the radial portion. This ensures that the cable to be guided is guided substantially from the furthest inwardly projecting ends of the webs. This makes it possible to achieve a particularly good centering of the cable.

In addition, a particularly good spring and damping effect is made possible by the preferred T or L of the profiled web, since the substantially tangential section is flexible with respect to the substantially radial section in the usual choice of material with conventional cable forces. In this way, a particularly accurate guidance combined with very good damping properties.

If the predominant tangential section still has a thickening at the end, the damping behavior of the cable sheath can be further improved.

Another advantage arises when the webs in the axial direction of the outer tube spiral run. This can be achieved that the tendency to pinch the cable is further reduced. Furthermore, a more uniform wear of the outer shell can be achieved in this way and increase the flexibility of the outer shell.

Extrusion has proven to be an advantageous production method for the cable sheath according to the invention. In the extrusion process, cable sheaths can be produced in an endless length, whereby the required cross-sectional profile of the cable sheath can be produced as an extruder mask.

Preferred materials for the cable sheath are essentially PETP, PP, PA and / or POM. These materials are durable, insensitive to temperature variations and, in conventional thicknesses, flexible enough to curve the cable sheaths.

If the slotted cable sheath is slotted over the entire length, the cable sheath according to the invention can be produced particularly easily and transport particularly space-saving. In addition, a simple adaptation to different cable diameters can be made. Furthermore, there are advantages during assembly.

If the cable sheath is slit only in sections, said higher elasticity can be provided in exactly those areas where a higher elasticity is required. In the other areas, the cable sheath can be made closed, which reduces the cable's sensitivity to fouling.

An independent aspect of the invention relates to a combination of a cable with a cable sheath, wherein the cable sheath is formed according to the above-described invention.

Particularly suitable is the aforementioned combination for train-pressure cable and / or pitch cable. Such, mechanical forces transmitted cables that are moved relative to the outer shell must be particularly carefully damped against rattling noises.

Other objects, features and advantageous applications of the invention will become apparent from the following description of an embodiment with reference to the drawings.

Brief description of the figures

They show schematically:

1 a combination of a cable with a cable sheath in perspective view without slot according to the invention in the shell;

2 a drive console for a sliding roof with a cable sheath according to the invention with cable;

3 a cross-section through a cable sheath according to a first embodiment without slot according to the invention in the shell;

4 a cross section through a cable sheath according to a second embodiment without slot according to the invention in the shell;

5a a perspective view of an embodiment of a cable sheath according to the invention in a curved view with slot in the shell and

5b Cable sheath off 5a in a rolled-up form in perspective view.

Preferred embodiments of the invention

1 shows a combination according to the invention 2 a cable sheath according to the invention 4 with a pitch cable 6 , The pitch cable 6 has a core in a conventional manner 6.1 and a spiral wire looped around it 6.2 on. Furthermore, a flocking of between two pitch wire sections extending pitch gear of the pitch cable 6 be provided. Such a wire is for example in the DE-PS 35 13 093 C2 described.

The cable cover 4 is shown in section and has a cross-sectional profile, as shown in detail in the 3 and 4 shown in different embodiments. Is concrete in 1 the embodiment according to 3 shown. The cable cover 4 has an outer tube 8th as well as in the 3 more precisely in terms of geometry and function described webs 10 on.

A diameter D _{K of} the cable 6 passing through the pitch cable 6.2 is determined, is considerably smaller than a diameter D _{H of} the cable sheath 4 , The bridges 10 are on an inside 8.1 of the outer tube 8th arranged and extend into the interior of the outer tube 8th , The pitch cable 6 gets inside the cable cover 4 through the bridges 10 guided.

The bridges 10 are designed so that they are flexible with respect to the outer tube 8th the cable cover 4 are. As a result, on the one hand, a relative displacement of the pitch cable 6 in the radial direction to the cable sheath 4 allows and on the other hand ensures that the pitch cable 6 always in contact with some of the footbridges 10 remains. Furthermore, the webs allow 10 in that occurring vibrations of the pitch cable 6 which, for example, generated by the drive of the pitch cable can be or by vibration in a vehicle in which the combination 2 is built.

Typical size ratios for D _K to D _H are approximately 1: 2, for example, D _K can be 3-6 mm, wherein D _{H is} 6-12 mm.

The cable management 2 consists of PETP, PP, PA and / or POM, where further appropriate admixtures may be present. The cable sheath according to the invention 4 is produced in an extrusion process and is therefore available as an endless product.

2 shows a carrier 12 for a drive of a sliding roof of a motor vehicle by means of a combination according to the invention 2 , There are two pitch cables 6 with cable sheaths 4 provided in a drive 14 lead. The drive 14 has a pinion, not shown, in the thread of the respective pitch cable 6 engages and this can move axially. In this case, alternatively, a single pitch cable 6 be provided or two pitch cables that are moved in the same direction or in opposite directions. The cable cover 6 is by means of guides 16 on the carrier 12 held. For this purpose, the cable sheath during assembly 4 in the prepared guides 16 inserted or clipped.

The cable cover 4 runs along at least one arc on the carrier 12 , In the area of the bend 18 Act when operating the pitch cable 6 Forces in the radial direction of the bend, either inwards or outwards, depending on the direction of the force. By the cable sheath invention 4 These deformations are largely due to the webs 10 inside the cable cover 4 recorded, so that rattling is effectively prevented.

3 shows a cross section through a cable sheath according to the invention 4 according to a first embodiment.

The cable sheath according to the invention 4 has an outer tube 8th and on an inside 8.1 arranged webs 10 on. The bridges 10 have a radial section 10.1 and a tangential section 10.2 on that in an end area 10.3 a thickening 20 having. The jetty 10 is L-shaped. The section 10.2 is essentially aligned tangentially, but the end 10.3 a smaller distance d _E to a center 22 the cable cover 4 has as the radial area 10.1 , This ensures that in the normal state, a pitch cable 6 only at the ends 10.3 of the bridges 10 is applied. The distance d _{E of} the end 10.3 to the center is equal to half the diameter D _{K of} the pitch cable 6 or slightly smaller, reducing the webs 10 be preloaded when the lead cable is inserted.

By the L-shape is achieved that the cables can move over a predetermined distance relative to the cable sheath in the radial direction, with the freedom of movement through the radial sections 10.1 is limited.

4 shows a further embodiment of a cable sheath according to the invention 24 ,

The cable cover 4 has an outer tube 28 and projections 30 on that over the circumference of the outer tube 28 are distributed. The projections 30 are in cross section obliquely to a center of the outer tube 28 pointing, radial direction. The projections 30 lie with their ends to a pitch cable, not shown, and thereby ensure good leadership. The inclined, so not radially aligned webs 30 thus form lamellae, which have a high elasticity and the relative movements of the pitch cable in the radial direction of the outer tube 28 allow.

The projections 30 are integral with the outer tube 28 educated. In a connection area of the webs 30 to the outer tube 28 The outer tube is thickened to withstand the stresses caused by the pitch cable on the cable sheath 24 be able to intercept. By the distribution of the webs 30 in the circumferential direction allows the cable sheath 24 can be arbitrarily aligned and that the cable sheath 24 is equally flexible in all directions.

The slats or bars 30 can be aligned in the axial direction or can spiral in the axial direction.

In the 5a and 5b a further embodiment of a cable sheath according to the invention is shown, which is an outer tube 34 as well as bars 40 shows.

The cable cover 34 also has a slot extending in the axial direction 42 auf, which in Pictured embodiment according to the 5a and 5b over the entire length of the cable sheath 34 extends.

This allows the in 5b illustrated manufacture of the cable sheath 34 in a rolled-up state, which brings production and transport benefits, since the cable sheath 34 can be transported more compactly when rolled up. In addition, this makes it possible to easily maintain different diameters of cable sheaths and to assemble different lengths.

The cable sheath according to 5a and 5b can all illustrated embodiments of webs, for example according to 3 or according to 4 exhibit.

LIST OF REFERENCE NUMBERS

2

Combination of cable sheath and cable

4

cable sheath

6

rising cable

6.1

core

6.2

lead wire

8th

outer tube

8.1

Inside of the outer tube

10

Stege

10.1

radial section

10.2

tangential section

10.3

End of the tangential section

12

carrier

14

drive

16

guides

18

bend

20

thickening

22

center

24

cable sheath

28

outer tube

28.1

Inside of the outer tube

30

Stege

34

cable sheath

40

Stege

42

slot

D _K

Diameter cable

D _H

Diameter case

d _E

distance

Claims (11)

Cable cover for a cable ( 6 ), in particular a pull-push cable or a pitch cable, with an outer tube ( 8th ; 28 ) and on an inside ( 8.1 ; 28.1 ) of the outer tube ( 8th ; 28 ) are arranged, predominantly in an axial direction of the outer tube ( 8th ; 28 ) extending webs ( 10 ; 30 ; 40 ), whereby the webs ( 10 ; 30 ; 40 ) substantially over the entire length of the cable sheath ( 4 ; 24 ; 34 ), several webs ( 10 ; 30 ; 40 ) distributed in the circumferential direction on the inside ( 8.1 ; 28.1 ) of the outer tube ( 8th ; 28 ) are arranged, and the webs ( 10 ; 30 ; 40 ) in one piece with the outer tube ( 8th ; 28 ) are formed, characterized in that the cable sheath ( 34 ) in the axial extension of such a slot ( 42 ), which has lateral access to one in the cable sheath ( 34 ) cable ( 6 ) guaranteed. Cable sheath according to claim 1, characterized in that the webs ( 10 ; 30 ; 40 ) to the interior of the outer tube ( 8th ; 28 ) are formed protruding. Cable sleeve according to one of the preceding claims, characterized in that the webs ( 10 ; 30 ; 40 ) obliquely or radially to the interior of the outer tube ( 8th ; 28 ). Cable sheath according to one of the preceding claims, characterized in that the webs ( 10 ; 30 ; 40 ) a radial section ( 10.1 ) and a predominantly tangential section ( 10.2 ) exhibit. Cable sheath according to claim 4, characterized in that the predominantly tangential section ( 10.2 ) with one end ( 10.3 ) in the radial direction to the middle region of the outer tube ( 8th ; 28 ) protrudes as the radial section ( 10.1 ). Cable sheath according to claim 4 or 5, characterized in that one end of the predominantly tangential section ( 10.2 ) a thickening ( 20 ) having. Cable sheath according to one of the preceding claims, characterized in that the webs ( 10 ; 30 ; 40 ) in an axial direction of the outer tube ( 8th ; 28 ) spiral. Cable sheath according to one of the preceding claims, characterized in that the cable sheath ( 4 ; 24 ; 34 ) is produced by extrusion. Cable sheath according to one of the preceding claims, characterized in that the cable sheath ( 4 ; 24 ; 34 ) consists essentially of PETP, PP, PA and / or POM. Combination of cable with cable sheath, whereby the cable sheath ( 4 ; 24 ; 34 ) is designed according to one of claims 1 to 9. Combination according to claim 10, characterized in that the cable ( 6 ) is designed as a train-pressure cable and / or as a pitch cable.

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