FR2581138A2 - Flexible shaft for rotary mechanical drive - Google Patents
Flexible shaft for rotary mechanical drive Download PDFInfo
- Publication number
- FR2581138A2 FR2581138A2 FR8506476A FR8506476A FR2581138A2 FR 2581138 A2 FR2581138 A2 FR 2581138A2 FR 8506476 A FR8506476 A FR 8506476A FR 8506476 A FR8506476 A FR 8506476A FR 2581138 A2 FR2581138 A2 FR 2581138A2
- Authority
- FR
- France
- Prior art keywords
- flexible
- kevlar
- rotational movement
- flexible shaft
- spirals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C1/00—Flexible shafts; Mechanical means for transmitting movement in a flexible sheathing
- F16C1/02—Flexible shafts; Mechanical means for transmitting movement in a flexible sheathing for conveying rotary movements
- F16C1/06—Flexible shafts; Mechanical means for transmitting movement in a flexible sheathing for conveying rotary movements with guiding sheathing, tube or box
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
Description
FLEXIBLE D'ENTRAINEMENT MECANIQUE EN ROTATION
La présente addition a pour objet un perfectionnement au dispositif décrit dans le Brevet principal NO 84 18251.ROTATING MECHANICAL DRIVE HOSE
The present addition relates to an improvement to the device described in main patent NO 84 18251.
On sait que le dispositif décrit dans le Brevet Principal a pour but de permettre une liaison mécanique entre un moteur et un appareil utilisateur afin d'entrainer en rotation au moins un organe dudit appareil. A cet effet, les deux éléments sont reliés par une gaine à l'intérieur de laquelle tourne, lorsque le moteur est entraîné, une spirale bobinée sur un noyau flexible, le noyau étant solidaire d'une spirale de Kevlar enrobée d'une couche de matériau à faible coefficient de frottement tel que du Teflon ou analogue, le sens de bobinage des fibres de Kevlar étant inverse du sens de rotation du mouvement à transmettre.It is known that the device described in the main patent aims to allow a mechanical connection between a motor and a user device in order to drive in rotation at least one member of said device. For this purpose, the two elements are connected by a sheath inside which rotates, when the motor is driven, a spiral wound on a flexible core, the core being integral with a Kevlar spiral coated with a layer of material with a low coefficient of friction such as Teflon or the like, the direction of winding of the Kevlar fibers being opposite to the direction of rotation of the movement to be transmitted.
Il est ainsi possible d'utiliser les propriétés mécaniques du
Kevlar en traction, celui-ci ayant un allongement élastique pratiquement nul de sorte qu'il ne peut, contrairement à l'acier qui actuellement utilisé, emmagasiner de l'énergie qui peut provoquer la rupture du flexible et des accidents.It is thus possible to use the mechanical properties of the
Kevlar in tension, this one having an elastic elongation practically zero so that it cannot, contrary to the steel which currently used, to store energy which can cause the rupture of the flexible and accidents.
Dans le premier Certificat d'addition, N 85 00686,on a décrit une gaine extérieure incompressible et la fixation, dans un culot de compound, de l'extremité de la spirale de
Kevlar.In the first Certificate of addition, N 85 00686, an incompressible outer sheath was described and the fixing, in a compound base, of the end of the spiral of
Kevlar.
Dans le second Certificat d'addition NO 85 01878, on a précisé la structure du moyau qui est constitué par des fibres parallèles de Kevlar entourées par une gaine de fibres de verre, de préférence à section hexagonale. In the second Certificate of addition NO 85 01878, the structure of the hub which is constituted by parallel Kevlar fibers surrounded by a glass fiber sheath, preferably with a hexagonal section, was specified.
Le brevet Principal et les deux premières additions concernaient un flexible destiné à entraîner un outil ou des appareils électroménagers, à partir d'un moteur unique. Il s'est avéré que l'invention pouvait trouver de nombreuses autres applications, notamment en robotique et en aéronautique où le gain de poids du flexible par rapport aux flexibles traditionnels est un avantage décisif.The Principal patent and the first two additions concerned a hose intended to drive a tool or household appliances, from a single motor. It turned out that the invention could find many other applications, in particular in robotics and aeronautics where the weight gain of the hose compared to traditional hoses is a decisive advantage.
Mais ces applications nécessitent souvent la transmission de forces considérables. La solution.immédiate consisterait à augmenter la section du fil de Kevlar constituant la spirale de transmission de forces orientée en sens inverse du mouvement de rotation à transmettre. Malheureusement, cette augmentation de la section du fil de Kevlar se traduit par une augmentation du diamètre du flexible qui peut également être un paramètre crucial dans les applications considérées
Selon la présente addition, le flexible de transmission d'un mouvement rotatif selon la revendication 2 du Brevet
Principal est caractérisé en ce que sur le noyau sont enroulées au moins deux spirales parallèles et de même sens d'enroulement, opposé au sens de transmission du mouvement de rotation.However, these applications often require the transmission of considerable forces. The immediate solution would be to increase the section of the Kevlar wire constituting the force transmission spiral oriented in the opposite direction to the rotational movement to be transmitted. Unfortunately, this increase in the cross section of the Kevlar wire results in an increase in the diameter of the hose which can also be a crucial parameter in the applications considered.
According to the present addition, the hose for transmitting a rotary movement according to claim 2 of the patent.
Main is characterized in that on the core are wound at least two parallel spirals and the same winding direction, opposite to the direction of transmission of the rotational movement.
Ainsi, la résistance à la rupture du flexible peut être multipliée par deux ou "n" si il existe "n" spirales. Bien entendu, la longueur de chaque spirale est également divisée par "n" de sorte que la longueur totale de fibres Kevlar n'est pas accrue et peut même être légèrement diminuée si le pas de chacune des spirales est égal à n fois le pas d'une spirale unique. Ainsi, bien que la résistance soit multipliée par 2 ou, n, n étant de préférence égal à 3 ou 4, le diamètre extérieur n'augmente pas.Thus, the breaking strength of the hose can be doubled or "n" if there are "n" spirals. Of course, the length of each spiral is also divided by "n" so that the total length of Kevlar fibers is not increased and can even be slightly reduced if the pitch of each of the spirals is equal to n times the pitch of 'a unique spiral. Thus, although the resistance is multiplied by 2 or, n, n being preferably equal to 3 or 4, the outside diameter does not increase.
Cette possibilité provient des caractéristiques du Kevlar qui peut travailler dans deux directions alors que le métal et, notamment l'acier supporte difficilement des contraintes qui ne sont pas unidirectionnelles. This possibility comes from the characteristics of Kevlar which can work in two directions whereas the metal and, in particular the steel hardly supports constraints which are not unidirectional.
Par ailleurs, la multiplicité des brins est extrêmement favorable à l'insertion de leurs extrêmités dans un culot de coumpound.Furthermore, the multiplicity of strands is extremely favorable for the insertion of their ends in a coumpound base.
Comme dans le Brevet Principal, les spirales de Kevlar sont noyées dans une matière composite de polyuréthane ou de résine époxy ou de vinyl. Eventuellement, une spirale composée de quelques fibres de Kevlar peut être torsadée en sens inverse uniquement pour maintenir les spires à une distance régulière l'une de l'autre. As in the main patent, the Kevlar spirals are embedded in a composite material of polyurethane or epoxy resin or vinyl. Optionally, a spiral composed of a few Kevlar fibers can be twisted in the opposite direction only to keep the turns at a regular distance from each other.
Dans tous- les cas, afin de conserver le mode d'action des fils de Kevlar, l'angle que forme les spires avec le plan vertical de section transversale du flexible doit être de l'ordre de 300. Dans ces conditions, l'effort transmis par les spirales s'exerce radialement et non longitudinalement comme dans les câbles connus contenant au moins une partie de
Kevlar.In all cases, in order to preserve the mode of action of the Kevlar threads, the angle formed by the turns with the vertical plane of cross section of the hose must be of the order of 300. Under these conditions, the force transmitted by the spirals is exerted radially and not longitudinally as in known cables containing at least part of
Kevlar.
Il va de soi que de nombreuses variantes peuvent être introduites, notamment par substitution de moyens techniquement équivalents sans sortir pour celà du cadre de l'invention. It goes without saying that many variants can be introduced, in particular by substitution of technically equivalent means without thereby departing from the scope of the invention.
Claims (4)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8506476A FR2581138A2 (en) | 1985-04-29 | 1985-04-29 | Flexible shaft for rotary mechanical drive |
DE8585906072T DE3568838D1 (en) | 1984-11-30 | 1985-12-02 | Device for the mechanical transmission of a rotation motion |
AT85906072T ATE41486T1 (en) | 1984-11-30 | 1985-12-02 | DEVICE FOR MECHANICAL TRANSMISSION OF ROTARY MOVEMENT. |
PCT/FR1985/000345 WO1986003266A1 (en) | 1984-11-30 | 1985-12-02 | Device for the mechanical transmission of a rotation motion |
EP19850906072 EP0202309B1 (en) | 1984-11-30 | 1985-12-02 | Device for the mechanical transmission of a rotation motion |
DK359586A DK359586A (en) | 1984-11-30 | 1986-07-29 | DRIVE FOR MECHANICAL TRANSFER OF A ROTARY MOVEMENT |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8506476A FR2581138A2 (en) | 1985-04-29 | 1985-04-29 | Flexible shaft for rotary mechanical drive |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2581138A2 true FR2581138A2 (en) | 1986-10-31 |
Family
ID=9318771
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8506476A Pending FR2581138A2 (en) | 1984-11-30 | 1985-04-29 | Flexible shaft for rotary mechanical drive |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2581138A2 (en) |
-
1985
- 1985-04-29 FR FR8506476A patent/FR2581138A2/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6008447A (en) | Transmission for moving panels provided with solar cells on a spacecraft | |
LU84130A1 (en) | STEEL CABLE FOR THE REINFORCEMENT OF AN ELASTOMERIC MATERIAL, PARTICULARLY FOR PNEUMATIC TIRES | |
US5105672A (en) | Rotary drive apparatus having one member with smooth outer peripheral surface | |
FR2852373A1 (en) | Transmission for rotating segment of robot, has cable with two strands, one stretched between pulley of small diameter and screw fixed in nut, and other stretched between pulley of large diameter and driven component | |
FR2599352A1 (en) | ELEVATOR DRIVE SYSTEM | |
EP0149336A2 (en) | Flexible tension members | |
CN113286958A (en) | Pulley and cable arrangement | |
FR2581138A2 (en) | Flexible shaft for rotary mechanical drive | |
JPH02100968A (en) | Filament take-up device | |
FR2624225A1 (en) | ELASTIC HOLLOW SHAFT IN TORSION | |
CA1169509A (en) | Tubular envelope for electric cable exhibiting high resistance to pressure and traction | |
FR2601393A1 (en) | ARAMID CABLE FOR HANDLING. | |
EP0107565B1 (en) | Apparatus for continuously bending and tempering glass sheets | |
CA1253374A (en) | Connecting device of a fiber optic cable to a junction box, and manufacture of said device | |
EP1280586B1 (en) | Composite synthetic string for tennis racket | |
CA2165724C (en) | Flexible coupling for rotating shafts | |
EP0031081A1 (en) | Apparatus for stranding wires | |
EP0202309B1 (en) | Device for the mechanical transmission of a rotation motion | |
RU2007110967A (en) | FLEXIBLE STOCK ASSEMBLING A ROTATING PROBE | |
EP0187368B1 (en) | Apparatus for joining an optical fibre cable to a junction box | |
FR2510624A1 (en) | Interwoven reinforcement textile - of singles glass yarns, woven on the bias | |
FR2620184A1 (en) | FLEXIBLE COUPLING FOR ROTARY TRANSMISSION | |
FR2718565A1 (en) | Faster, longer length, reversible cabling appts. with low downtime | |
CH678232A5 (en) | ||
EP0263363B1 (en) | Cylindrical support for an optical cable |