DE102008037208A1 - Cable casing for combination of cable, particularly mechanical forces transferring cable, course pressurizing cable or upward gradient cable, has external pipe and bars extending in axial direction - Google Patents

Abstract

The cable casing (4) has an external pipe (8) and bars (10) extending in an axial direction of the external pipe are arranged at an inner side (8.1) of the external pipe. The cable casing is made of polyethylene terephthalate, polypropylene, polyacrylate or polyoxymethylene.

Description

Technical area

The The invention relates to a cable sheath or a cable guide and a cable with a cable sheath. The cable cover is designed for a mechanical forces transmitting Cable, in particular a push-pull cable or a pitch cable.

State of the art

mechanical Forces transmitting cables such as pull-push cables or pitch cables are known in the art. The cables come among other things in motor vehicles for the actuation used by sunroofs or windows.

A known 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 for driving sunroofs in motor vehicles, the pitch cable takes over the role of a guided in a pipe flexible rack.

For Such pitch cable is for guidance of the cable and the susceptibility to soiling regularly a cable sheath or a guide tube provided.

One Disadvantage of such pitch cable with guide tube is however, that the pitch cables in the guide tube for Tend to rattle. Especially when used in motor vehicles Vibrations of the engine or the road surface on the Gradient cable and the pipe transfer, causing 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.

Indeed has been shown in practice that providing a flock thread in the screw thread with extreme laying is not sufficient to a satisfactory To achieve noise behavior. Such extreme displacements come for example in the sunroof area in the curved Laying areas of the pitch cable before. In the loaded condition is the pitch cable against the outer walls of the Cable sheath pressed so that the flock thread no Buffering more. This may result in tensile or compressive loading of the cable to rattle. Even if the cable is unloaded, the vibration behavior changes in strongly curved areas by spreading the flock threads, what the Klapperneigung elevated.

About that In addition, it has proved problematic, flocking threads on the wires, as the wires at be mixed with the production of fats. These fats need be largely removed to stick the flock thread. This increases the manufacturing effort and the risk of rejects. In addition, the flock threads can replace in operation, causing an early defect the cable could lead or premature occurrence of rattling noises.

From the DE 302 15 33 a bowden cable is known, with a pull wire, which is guided in a hose made of plastic material, which in turn is covered by means of a Bowden cable jacket formed essentially by a wire spiral. 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 pitch cable and the inner wall of the guide tube as well as a uniform flocking of the inner wall of the pipe require considerable technical effort, which also not with the necessary process reliability shows the desired success, to form a uniform noise-reducing intermediate layer between pitch cable and pipe.

About that In addition, the local structure in practice by the regular curved laying of the guide tube heavily loaded. The necessary plasticizers for the polymer foam lose weight over time and the polymer foam hardens especially under the often extreme conditions of use in motor vehicles, for example in the roof area. There will be in Summer without further temperatures above 60 ° C reached.

If the polymer foam layer is cured, it tends to Moving the pitch cable to dissolve, on the one hand can lead to the blocking of the pitch cable and on the other hand Cause of rattling noises can be. The cable must then completely replaced.

One another problem that causes the cables to rattle is the attachment of the cable sheaths or guides in the motor vehicles. The cable sheaths often have one only slightly larger diameter as the cable in the cable sheath. In order to it happens in the transition areas and in the end areas the cable sheaths in vibration to hit the pitch cable, especially in an unloaded condition. Another cause of rattling noises is that under tensile or compressive stress of the cable, the cable guide elements warp and thereby also tend to rattle.

task

task The invention is therefore a cable sheath or a cable guide and specify a combination of cable sheath and cable, overcome the disadvantages resulting from the prior art and effective rattling or other noise to prevent the cables or cable guides.

Presentation of the invention

These Task is solved by a cable sheath or Cable guide according to claim 1 and by a combination of a cable with a cable sheath according to the independent claim 14. Advantageous embodiments of the invention are the subject of the dependent claims.

An inventive cable sheath or guide 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 a guide in its interior for a previously described cable. The inside of the outer tube arranged webs cause the cable to be led essentially comes into contact with the webs and not with the remaining inside of the outer tube. About that In addition, the webs cause the cable inside the outer tube with respect to the longitudinal extent of the tube radial play, so that tensile and compressive loads of the cable, in particular in bow areas usually to forces lead radially to the bow, within the cable sheath be caught without the cable sheath itself noticeably deformed.

The Webs have a sufficient choice of materials for this Flexibility and thus still cause the cable not unguided over long distances runs inside the cable sheath. A rattle can thus be effectively prevented.

One Another effect is that the cable sheath through the webs a larger one relative to the diameter of the cable to be led Diameter than known in the prior art cable sheaths. This allows the cables in the connection areas further spaced lead from the brackets and thus effectively striking prevent the cables.

Farther it is due to the large diameter of the cable sheaths readily possible, the cable sheaths directly on the mounting units, eg. B.

Sunroof modules, to fasten and guide, as thicker cable sheaths easier to insert into the holders than thin ones Cable sheaths. On expensive holding devices or assembly process can thus be dispensed with.

Farther is through the cable sheath invention allows the cables to be mounted without preload can, because of the bridges a balance of cable play is possible.

According to a first advantageous embodiment of the invention, 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.

With Advantage is further provided that the webs to the interior of the Outer tube are formed protruding. If the outer tube radially symmetrical, that is cylindrical, can the webs in the direction of a symmetry axis or a small radius may be arranged around this axis of symmetry. For non-radially symmetric cable sheaths is a centroid a cross section through the cable sheath or a smaller one Area around the centroid around preferred.

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

alternative can be provided that the webs at an angle, so at an angle to the radial direction, to the interior of the outer tube extend. Then forces the cable to the webs acts, cushioned. This solution is especially recommended for cables that do not transmit particularly high forces have to. With the help of slanted webs continue to achieve that the cable to be led is not tilting and jamming between the webs.

Prefers are more webs distributed in the circumferential direction on the inside arranged the outer tube. This can be a achieve particularly good guidance of the cable and the cable sheath install in any orientation. It can be between be provided two webs and any number of webs. Prefers the webs are even over the circumference the outer shell is distributed.

A Further advantageous embodiment of the invention provides that the webs are profiled in cross-section. The bridges according to this advantageous embodiment the profile has a radial section and a predominantly tangential section on. The webs thus form in cross section preferably an L-shape or a T-shape. The predominantly Tangential section is doing to the interior of the outer shell aligned. With the help of such webs can be the contact surface of the cable to be led to the Enlarge cable sheath and the clatter inclination further reduce. Furthermore, this can be done in this way reduce the risk of trapping the cable between the bars.

Of the tangential section preferably has one end in radial Direction of the cable sheath further to the middle area 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 runs obliquely to the tangent. Through the ends of the webs is a free diameter within the outer shell intended, which is smaller than one Diameter formed by the radial portion. In order to is achieved that the cable to be carried in essence led from the furthest inwardly projecting ends of the webs becomes. This allows a particularly good centering reach the cable.

about the preferred T or L of the profiled web is above In addition, a particularly good spring and damping effect allows, as the substantially tangential section compared to the substantially radial section in the usual Choice of material with usual rope forces flexible is. In this way is a particularly accurate leadership combined with very good damping properties.

If the predominant tangential section continues to thicken has at the end, can the damping behavior the cable sheath continues to improve.

One Another advantage arises when the webs in the axial direction of the outer tube spiral. In order to can be achieved that the pinching tendency of the cable continues is reduced. Furthermore, can be in this way a more even wear of the outer shell achieve and the flexibility of the outer shell increase.

Especially Preferably, the webs are integral with the outer shell educated. In this way, the inventive Produce cable sheath particularly inexpensively. About that In addition, the connection of the webs with the outer tube is special reliable.

When advantageous manufacturing method for the invention Cable sheath has proven to extrude. In the extrusion process can cable sheaths be produced in endless length, where the required cross-sectional profile of the cable hell can be produced as extruder mask.

Preferred materials for the cable sheath are essentially PETP, PP, PA and / or POM. These materials are durable, insensitive to temperature changes and in usual di sufficiently flexible to lay the cable sheaths in curves.

A further advantageous embodiment of the invention Cable sheath provides that the cable sheath in axial extension having a slot. Such a slot increases the Flexibility of the cable sheath. This can be done Lay narrower radii of curvature than without a slot. About that In addition, a slot in the cable sheath allows a lateral Access to a train-push cable.

If the slotted cable sheath over the entire length slotted, the inventive can Cable sheath particularly easy to produce and particularly space-saving transport. In addition, a simple customization be made to different cable diameter. Farther There are advantages during assembly.

If the cable sheath is only partially slotted, can said higher elasticity in exactly the areas be provided, in which a higher elasticity is required. In the other areas, the cable sheath be executed closed, what the pollution sensitivity the cable is reduced.

One independent thought of the invention relates to a cable with a cable sheath, wherein the cable sheath according to the above-described invention is formed.

Especially suitable is the aforementioned combination for train-pressure cable and / or pitch cable. Such, mechanical forces transmitting Cables that are moved relative to the outer shell, need extra care against rattling noises be steamed.

Further Objectives, features and advantageous applications The invention will become apparent from the following description of a Embodiment with reference to the drawings. Make up all described and / or illustrated Features in their meaningful combination the subject of the present Invention, also independent of the patent claims and their remittances.

Brief description of the figures

It show schematically:

1 a combination of a cable according to the invention with a cable sheath in a perspective view;

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 the invention according to a first embodiment;

4 a cross section through a cable sheath according to the invention according to a second embodiment;

5a a perspective view of another embodiment of a cable sheath in a curved view as well

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

Preferred embodiments 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 can be generated for example by the drive of the pitch cable or by vibrations 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.

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

The 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 electric wire

D _H

diameter shell

d _E

distance

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 3513093 C2 [0003, 0006, 0051]
• - DE 3021533 [0009, 0010]
• - DE 3124444 C2 [0011, 0018]

Claims (15)

Cable cover for a cable ( 6 ), in particular a cable transmitting mechanical forces, in particular a pull-push cable or a pitch cable, having 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 ). Cable sheath according to claim 1, characterized in that the webs ( 10 ; 30 ; 40 ) substantially over the entire length of the cable sheath ( 4 ; 24 ; 34 ). Cable sheath according to claim 1 or 2, 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 a plurality of webs ( 10 ; 30 ; 40 ) distributed in the circumferential direction on the inside ( 8.1 ; 28.1 ) of the outer tube ( 8th ; 28 ) are arranged. 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 6, 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 6 or 7, 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 webs ( 10 ; 30 ; 40 ) in one piece with the outer tube ( 8th ; 28 ) are formed. 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. Cable sheath according to one of the preceding claims, characterized in that the cable sheath ( 34 ) in axial extension a slot ( 42 ) having. Combination of cable with cable sheath, whereby the cable sheath ( 4 ; 24 ; 34 ) is designed according to one of claims 1 to 13. Combination according to claim 14, characterized in that the cable ( 6 ) is designed as a train-pressure cable and / or as a pitch cable.