WO2001088393A2

WO2001088393A2 - Multiple push/pull cable operating system for flexible installation

Info

Publication number: WO2001088393A2
Application number: PCT/EP2001/005604
Authority: WO
Inventors: Norbert Noetzold
Original assignee: Norbert Noetzold
Priority date: 2000-05-16
Filing date: 2001-05-16
Publication date: 2001-11-22
Also published as: WO2001088393A3

Abstract

The aim of the invention is to produce a push/pull cable control system with a pressure sheath (C1), formed from interconnected links (1.1), by means of which several control cables (A1), each of which may be displaced in a guide in a guide tube (B1; B2), which, on installation around corners, remains stable for length, is lighter and kink-resistant, works without tension, can resist high pressure, guarantees the lowest frictional resistance of the cable(s), which may be automatically and thus cheaply produced in any length, is recyclable in an environmentally sound manner and which may be adjusted to any length without tools.

Description

Flexible, multi-pull / push-pull cable system

The invention relates to cable systems according to the preamble of claims 1; 6; 8. A pull / push cable system is known under the name Bowden cable, named after the inventor Ernest Mornington Bowden. Due to the formation of a pressure jacket, which must always be longer than the clear distance of the pressure-absorbing counterhold in the bend area, the bendable pressure jacket temporarily (when pulling on the rope) becomes a pipe bend in which a force is directed around the "corner" by means of the pull rope May 5

When pulling on the rope, rezibrok (at the same time) creates pressure on the sheath - hence the pressure sheath.

The application of pull / push cable systems (hereinafter referred to as Bowden cable) is extremely versatile. Often believed dead, the Bowden cable is experiencing a renaissance in vehicle construction. In automotive engineering, the Bowden cable is used, among other things, to actuate the clutch, gas, hand brake, window regulator, and seat adjustment. A new application has been added to operate the gear shift. So far, this was operated mechanically using levers by hand or other triggering means. In order to reduce the vibration noise transmission and the better assembly, Bowden cables are used in combination to remotely control a gimbal movement. The same applies to the exterior mirror adjustment from the interior. 15

The biggest existing problem of these "Bowden cables" currently used is the change in length during bending, which requires complicated compensation mechanisms and severely limits their usability. In addition, these systems are very sensitive to kinks, which limits their operating time very much actuation and only conditionally capable of draining, having a higher weight and being very difficult to cycle 20 makes the application problematic. The pressure jacket consists of tubular, coiled wire, which presses the individual coils under pressure, which presses the pressure jacket into a straight tube Only the rope / cable and the pressure jacket stops force the jacket into the desired bend, firstly resulting in large lateral forces, which creates increased friction of the traction rope. cable

Secondly, enormous torsional forces arise because when the tension / pressure system is bent, the pressure on the jacket (c) can only be supported on very small contact surfaces in the inner radius of the coiled jacket. These surfaces are non-geometric and constantly changing when the sheath changes its arc. There, the coils are exposed to a very high torsional pressure, which is why the non-geometrical surfaces flatten out quickly, which can add up to several mm reduction of the pressure jacket per coil 30. The object of the invention is to make the pull / push cable system stable in length, kink-resistant more easily and smoothly. According to physical knowledge, the ball joint maintains a central length uniformity when deflecting. The patent DE 195 34 643 builds on this logic, in which a train / pressure transmission system is described. Instead of the 35th pressure jacket (spiral) made from coiled wire. Joint parts used. The joint parts, which are threaded onto a guide tube and penetrated by the pull cable, rest 40 on concave / convex shaped end faces and thus result in a length-stable pressure jacket. The disadvantage of this system is that the joint parts are located on a guide tube without mutual connection, which limits an economically attractive production of this system for many purposes. Japanese patent application 09021413 A shows a train / push system with several train cables. 45

Here the pressure jacket (1) consists of wires (7) twisted longitudinally around a polymer tube (4), which has a polymeric sheath (8) for bundling. The compressive forces have to absorb the individual wires (7) on the end face, which allows only slight transmission of dcld. When the sheet is laid, a longer circumference is created on the large radius of the pressure jacket and a smaller U start on the small radius, which is associated with the displacement of the surrounding wires 50. The result is that these wires (7) look out at the end faces of the jacket (1) for different lengths and thus greatly minimize the support surface relative to the counter-holder, which causes a constant change in the length of the jacket, the guide tube (4) cannot be replaced - since it is a wearing part - but it should be as possible. The invention is based on several objects, namely the advantage of having the pressure jacket (c) according to 55 of the features described in claims 1-8 and in the description, but in an expanded form the linkability of the joint parts to form an infinite chain and within a pressure-absorbing jacket not just one, but several tensile force-transmitting ropes / wires in order not to have to use several outer shells with the known disadvantages for special tasks The pressure-transmitting jacket is simplified in terms of production technology and logistically by the concatenation 60 in such a way that, firstly, yard goods can be produced and marketed from the jacket without a guide tube. For example, that gimbal movements can be controlled remotely via this push / pull system. Then there is the phenomenon of length stability with alternating arcuate movement of the pressure jacket. This also minimizes the frictional resistance within cable pull systems. In addition, an improvement in the buckling strength, the directional stability, the tightest and least stress-free cornering and high power transmission should be achieved. Furthermore, a reduction in the contact areas of the pull cables and better armoring and sealing against external influences and thus an optimization of the use of generic cable systems are to be achieved. 75

This object is achieved by the features of claims 1; 6 and sub-claims 2 - 5 and 7 solved. The outer diameter of the guide tube (Bl) corresponds to the inside dimension of section (4.1) of the opening. Instead of one bushing, there are also multible bushings for several rope guides. Due to the arrangement of the cross sections (5a; 4.1; 5.1; 5b; 3a; 3c) of the opening with different internal dimensions, a narrow and low-stress 80 is

Curving of the guide tube of the joint parts (1.1) possible. The rope contact areas are reduced by 75%. With the groove (3b) in the curved area of the pressure surface (3) foreign parts and lubricant are bound, which reduces the friction on the end faces (2 to 3). The invention is described in more detail with reference to exemplary embodiments shown in the figures. According to FIGS. (1; 3; 3a), the joint parts (1.1) are combined to form a coherent chain 85, which is penetrated by a flexible support and guide tube (B1), the external dimension of which corresponds to the internal dimension of the axial openings in the sections (4.1 ) corresponds. The axial breakthrough of the joint parts consists of sections of different cross sections (5a; 4.1; 5.1; 5b; 3a; 3c). They are articulated to one another, but are continuously guided by the guide tube (Bl). 90

In the embodiment of FIG. 1, the articulated parts (1, 1) are supported on curved faces (2 to 3) that conform to the shape of the end. The support and guide tube (B1) is supported in section (4.1) of the opening. Sections (5.1, 5A) serve as free spaces for continuous pipe routing when the train / push system is bent. 95

In the embodiment according to claim 7, the joint parts can also be installed without the guide tube (B1), the tensile force-transmitting cable (AI) being supported directly in the cross section of the section (4.1) of the opening and being able to slide therein. For this application, the joint parts should be of a longer design and made of synthetic plastic. 100

For special applications, a pressure jacket (C2) made of tubular coiled profile wire with an exchangeable guide tube (B1) is provided which has several openings along the tube axis, which are slightly twisted around the axis from the start of the tube to the end of the tube and which serve as cable guides. The pressure jacket (C2) can be round in shape, which can be deflected in all directions. Another modification of the pressure jacket (C2) is the oval 105

Shape. The outer cross-section of the guide tube (Bl) is congruent in shape to the inner cross-section of the oval pressure jacket (Cl). The guide tube (Bl) has the openings for the ZugseüV cable routing parallel to each other (Fig.Fig.5a). The pull ropes are generally made of braided steel wire; braided synthetic fibers with carbon or glass fiber components are also suitable for special applications. Reference numeral keys

AI ZugseuV ropes / cable;

B 1 support and guide tube (two tubes and 3 tubes arranged in parallel)

B2 guide tube with openings arranged parallel to the longitudinal axis

Cl tubular pressure-absorbing jacket formed from joint parts

C2 tubular pressure-absorbing jacket made of coiled profile wire

Ca polymeric coating

1.1 Joint parts / molded parts

2 curved surface / convex shape

3 matching counter surface to 2 (concave shape) 3 a collar for chaining

3b groove, groove for lubricant

3 c dimensionally reduced internal dimension of the collar (3 a)

4.1 Breakthrough with support function for guide tube

5 A breakthrough - trumpet-shaped free space

5.1 Breakthrough - free space

5b recess

2 sheets of drawings on page 7 Fig. 1 - 3b

Page 8 Fig. 4 - 5a

Claims

claims

1. Rope pull system with a tensile force-transmitting rope / cable (A) and an arc-shaped pressure jacket (C) enveloping the rope cable (A), which is formed from a flexible guide tube (B) with threaded joint parts (1) of the type that the joint parts (1) are formed with an opening with cross-sectional areas (5a; 4; 5) that are dimensionally differentiated in the axial direction and are carried on the cross-sectional constriction (4) by the tube (B) and on surfaces that are curved to the shape of the face (2 to 3), and can be laid in an arc, characterized in that the joint parts (1.1) have an axial opening which has differentiated cross sections (5a; 4.1; 5.1; 5b; 3a; 3c) so that the area of the Constriction (3c) of the collar (3a), which extends over the slightly larger convex head (2) of another joint part (1.1), offers the possibility of being interlinkable, so that an endless chain can be produced through which a flexible guide tube (B; Bl) is brought to form the pressure jacket (Cl).

Claim 2 was included in claim 1 - all claims have been moved up.

2. Cable system according to claim 1, characterized in that the flexible guide tube (Bl) has a plurality of individual openings in the axial direction, through each of which a cable (AI) can be guided.

3. Cable system according to claim 1, characterized in that a guide tube can be provided for several pull cables (AI) if all guide tubes (Bl) in the total cross-section do not exceed the clear width of the cross-section (4.1) of the opening of the joint parts (1.1).

4. cable system according to de claims 1 and 6, characterized in that the hinge parts (1.1) advantageously made of plastic, which glide-promoting components are added; are made of metal, metallic fabrics or ceramic.

5. Cable system according to several claims 1 to 6, characterized in that the pressure jacket (Cl), formed from the hinge parts (1.1), is additionally clad with a flexible supporting sheath (Ca), which is made of braid or an elastomer.

6. Rope pull system with a tensile force-transmitting rope (A) and an arc-shaped pressure jacket (C) that surrounds the rope, which consists of a ZugseήV cable (A) and threaded joint parts (1) which face the front on congruently curved surfaces (2 to 3) rest, is formed, characterized in that the joint parts (1.1) are designed with an opening with dimensions differentially dimensioned in the axial direction (5a; 4.1; 5a; 5b; 3a; 3c) so that the area of the constriction (3 c) of the collar (3 a), which engages over the convex head (2) of another joint part (1.1), can be linked together to form an endless chain, through which the traction cable Z-cable (AI) grips and this in the area (4.1) of the breakthrough of the joint parts (1.1).

7. Cable system according to several of claims 1-6, characterized in that the curved surface (3) of the joint parts (1.1) has a rmg-shaped groove (3b) for receiving lubricant or abrasion particles.

8. Multibles pull / push-pull cable system with a tensile force-transmitting cable / cable (A) and a cable / cable enveloping arc-shaped pressure-absorbing sheath (C) formed from a tubular coiled profile wire, characterized in that the coiled profile wire is tubular manufactured pressure jacket (C2) encloses an elastomeric guide tube (Bl), which has several individual openings in the axial direction arranged around the central axis, which are suitable overall for guiding several traction cable A cables (AI).

9. Cable system according to claim 8, characterized in that the tubular pressure jacket (C2) made of coiled profile wire is oval-shaped and encloses an outer cross-section which conforms to the inner cross-section of the pressure jacket and has a congruent bendable guide tube (B2) which has several adjacent openings in the axial direction, which overall are suitable for guiding several traction cable cables (AI).

10. Cable system according to some of claims 1-9, characterized in that the ZugseuV cable is made of a carbon fiber liquid crystal polymer or a carbon fiber polyamide compound.

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