EP0586409A1 - Telescopic tubular splined assembly. - Google Patents

Telescopic tubular splined assembly.

Info

Publication number
EP0586409A1
EP0586409A1 EP92909620A EP92909620A EP0586409A1 EP 0586409 A1 EP0586409 A1 EP 0586409A1 EP 92909620 A EP92909620 A EP 92909620A EP 92909620 A EP92909620 A EP 92909620A EP 0586409 A1 EP0586409 A1 EP 0586409A1
Authority
EP
European Patent Office
Prior art keywords
tubular section
tubular
ring
section
axial
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.)
Granted
Application number
EP92909620A
Other languages
German (de)
French (fr)
Other versions
EP0586409B1 (en
Inventor
Ledger Simond
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SIMOND Ludger
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0586409A1 publication Critical patent/EP0586409A1/en
Application granted granted Critical
Publication of EP0586409B1 publication Critical patent/EP0586409B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C11/00—Accessories for skiing or snowboarding
    • A63C11/22—Ski-sticks
    • A63C11/221—Ski-sticks telescopic, e.g. for varying the length or for damping shocks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32254—Lockable at fixed position
    • Y10T403/32467—Telescoping members
    • Y10T403/32475—Telescoping members having detent
    • Y10T403/32501—Cam or wedge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32254—Lockable at fixed position
    • Y10T403/32532—Clamped members
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/40—Radially spaced members joined by independent coupling
    • Y10T403/405—Flexible intermediate member
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/57—Distinct end coupler
    • Y10T403/5793—Distinct end coupler including member wedging or camming means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7047—Radially interposed shim or bushing
    • Y10T403/7051—Wedging or camming
    • Y10T403/7052—Engaged by axial movement
    • Y10T403/7056—Threaded actuator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7098—Non-circular rod section is joint component

Definitions

  • the present invention relates to telescopic tubular assemblies, such as, for example but not limited to, the poles used for ski touring or mountaineering, comprising several successive tubular sections and sliding in each other between a retracted position and a deployed position.
  • telescopic poles are used to adjust the length of the pole according to the slope of the terrain on which the user is moving.
  • the stick is intended to support an axial force. Consequently, selective locking means must allow the sections to be axially blocked in relation to the others, either in the deployed position, or in the retracted position, or in all intermediate positions.
  • Various structures have already been proposed ensuring the locking of the sections into one another.
  • an axial end piece is fixed as an extension of a first tubular section of small diameter.
  • the nozzle generally has a conical bearing and a threaded part.
  • An expandable locking ring is mounted to slide axially in the tubular section of large diameter, and has a generally conical inner bearing bearing against the conical bearing of the axial end piece.
  • An actuator means such as a nut is adapted to slide axially in the tubular section of large diameter and be locked in rotation in this tubular section, the actuator means screwing onto the threaded part of the axial end piece to axially tighten and loosen the ring by relative rotation of the tubular sections.
  • the actuator means is constituted by the locking ring itself, which rubs against the inner wall of the large diameter tube.
  • the blocking in rotation of the ring turns out to be random.
  • the actuator means also consists of the ring itself, which is locked in rotation in the large diameter tube by a longitudinal rib projecting from the inside of the tube and coming lodge in a longitudinal groove in the ring.
  • the inner rib of the large-diameter tube constitutes a hindrance in guiding and sliding the small diameter tube inside the large diameter tube. There is then poor guidance between the two tubes, which are not concentric. During bending forces on the stick, the internal rib deforms the tube of small diameter and deteriorates it.
  • the actuating means is also the locking ring itself, which can slide.
  • the problem proposed by the present invention is to design a new locking structure which ensures both good guidance of the tubes relative to each other, without subjecting the locking ring to undue mechanical stress, the structure being further compatible with the presence of three or more of three successive tubes.
  • a telescopic tubular assembly comprises: - at least a first tubular section of large diameter and a second tubular section of smaller diameter, the second tubular section having an inner end housed inside the first tubular section and being mounted for free rotation and sliding in the first tubular section between a retracted position and a deployed position,
  • an actuator member comprising a first actuator element mounted to slide in the first tubular section of larger diameter, and comprising a second fixed actuator element of the second tubular section of smaller diameter, the first and second actuator elements cooperating with each other by screwing to axially move the first actuator element during an axial relative rotation, - an element expandable locking device, mounted with axial sliding in the first tubular section of larger diameter, integral in axial translation with the second tubular section of smaller diameter, and urged by the first actuating element of the actuating member selectively causing its radial expansion or its retraction during its axial movements,
  • the internal surface of the first tubular section of larger diameter comprises at least three longitudinal ribs distributed regularly along its periphery, each rib engaging in a respective longitudinal peripheral groove for blocking the first actuator element for its blocking in rotation, - said ribs occupy all or most of the length of the first tubular section, the ribs are shaped to come into abutment with little play and simultaneously against the external surface of the second tubular section of smaller diameter, - said ribs have a wide and rounded ridge surface to match a significant part of the periphery of the outer surface of the second tubular section and constitute between the tubular sections a bearing surface capable of supporting the mechanical bending stresses undergone by the telescopic tubular assembly.
  • the internal ribs of the tube of larger diameter, forming grooves therefore constitute both means for locking the rotation of the first actuator element, and suitable means for guiding and holding the tube of smaller diameter. when it slides in the larger diameter tube.
  • the inner ribs of the tubular sections are advantageously formed by driving in the wall of the tubular section, simultaneously forming more longitudinal outer grooves narrower than the inner ribs.
  • the fluted tubular structure thus obtained is particularly rigid, without any increase in weight.
  • This structure remains compatible with the existence of more than two successive sections, by providing that the outer grooves of the tube of smaller diameter are narrower than the inner ribs of the tube of larger diameter in a junction zone, avoiding their mutual engagement. .
  • FIG. 1 is a front view, in partial section, of the locking zone between two successive sections of the telescopic stick according to an embodiment of the present invention
  • FIG. 2 is a similar view of a second stick locking zone according to the present invention.
  • FIG. 3 is an end view of the locking ring, in the direction shown by arrow A in Figure 1;
  • - Figure 4 illustrates the sliding of the respective sections in each other, in cross section
  • - Figure 5 is a section in the plane B-B of Figure 1;
  • FIG. 6 is a front view in partial section of the locking zone between two successive sections according to another embodiment of the present invention j
  • Figure 7 is an exploded front view of the structure of Figure 6;
  • FIG. 8 is an end view of the tightening nut of Figure 7;
  • FIG. 9 is a cross section along the plane C-C of Figure 7;
  • FIG. 10 is a cross section along the plane D-D of Figure 7;
  • - Figure 11 is a front view in partial section showing a sealing ring structure according to a first embodiment
  • - Figure 12 is a front view in partial section showing a sealing ring structure according to a second embodiment
  • the telescopic tubular assembly according to the present invention is a stick comprising three successive sections, namely a first tubular section 1 of larger diameter, a second tubular section 2 of smaller diameter, and a third tubular section 3 of even smaller diameter.
  • the second section 2 is slidably mounted in the first section 1.
  • the third section 3 is slidably mounted in the second section 2.
  • a portion of the second section 2 remains permanently inside the first section 1, and it includes a inner end 4.
  • the first tubular section 1 of larger diameter has a cylindrical inner surface 5 of generally circular section, comprising at least three longitudinal ribs 6, 13 and 14 occupying all or most of its length, and of low height .
  • the second tubular section 2 of smaller diameter has a cylindrical outer surface 60, of generally circular section, shaped to slide axially in the interior space limited by the interior surface 5 and the longitudinal ribs 6, 13 and 14 of the first tubular section 1 of large diameter.
  • the inner surface 5 of the first tubular section 1 has three longitudinal ribs 6, 13 and 14 regularly distributed around the periphery of the section.
  • the three longitudinal ribs 6, 13 and 14 engage in three respective corresponding grooves 15, 16 and 17 of the locking ring 10.
  • the ribs 6, 13 and 14 are formed by driving in the wall of the tube forming the first tubular section 1, the depression simultaneously producing the longitudinal external grooves 18, 19 and 20.
  • the longitudinal external grooves 18, 19 and 20 have a slightly smaller width than the corresponding internal ribs 6, 13 and 14.
  • the ribs 6, 13 and 14 must form the bearing surface on which the inner tubular section slides or pivots 2.
  • the ribs 6, 13 and 14 have a wide and rounded ridge surface, to match a significant part of the periphery of the outer surface of the second tubular section.
  • the ribs 6, 13 and 14 are shaped to come into abutment with little play and simultaneously against the external surface of the second tubular section 2.
  • the second tubular section 2 also includes ribs and grooves similar to those of the first tubular section. However, to allow free rotation of the second tubular section 2 in the first tubular section 1, its outer grooves 21, 22 and 23 are narrower than the inner ribs 6, 13 and 14 of the first tubular section 1. Thus, the inner ribs 6, 13 and 14 of the first tubular section cannot engage in the corresponding external grooves 21, 22 and 23 of the second tubular section, which can thus freely pivot axially in the first tubular section 1.
  • the second tubular section 2 carries, as an extension of its internal end 4, an axial end piece 7 having a generally conical surface 8 extended by a threaded part 9, for example of smaller diameter .
  • a threaded locking ring 10 is screwed onto the threaded part 9 of the axial end piece 7, and it comprises a generally cylindrical outer surface 11 shaped to slide axially with little play in the first tubular section 1 and to be locked in rotation by the inner ribs 6, 13 and 14 of the first tubular section 1.
  • the locking ring 10 comprises an end region 12 which is elastically deformable in the radial direction, and oriented axially to bear on the conical bearing 8.
  • the locking ring 10 includes a threaded central bore 37, p, to cooperate with the thread of the threaded part 9, and a first generally conical bearing 39 to cooperate with the conical bearing 8.
  • the length of the locking ring 10 is slightly less than the length of the threaded portion 9.
  • the free end 24 of the threaded portion 9 comprises an enlarged portion, of diameter greater than the diameter inside of the locking ring 10 to form a stop limiting the stroke of the ring away from the conical bearing 8.
  • the locking ring 10 comprises, in its end zone
  • the ring 10 constitutes the expandable element and the first actuator element, while the end piece 7 constitutes the second actuator element.
  • the endpiece 7 is an attached endpiece, forcibly engaged in the interior end 4 of the second tubular section 2.
  • a sealing ring 26 is fitted on the covering end 27 of the first tubular section 1, to which it is secured axially.
  • the sealing ring 26 comprises an inner rim 28 which engages in an external annular groove 29 of the first tubular section 1.
  • the end face 30 of the sealing ring 26 comprises an opening 31, the opening of which section corresponds to the outside section of the second tubular section 2, so as to slide with little play on the outside surface of the second tubular section 2.
  • a stop limits the movement of the locking ring 10 to the deployed position of the stick.
  • the stop is produced by a groove 32 or a punching on the surface of the first tubular section 1, producing a lug protruding from the interior face of the first tubular section 1 and against which the end region 12 of the ring comes to bear. lock 10.
  • FIGS. 1 and 2 Another embodiment of abutment is shown in FIGS. 1 and 2, in the form of one or more tongues 33, integral with the sealing ring 26, and coming to be housed in the space formed by the outer groove 22 of the second tubular section 2.
  • the tongue 33 comes to bear, at the end of its travel, against the end region 12 of the locking ring 10.
  • a similar locking structure is provided, as shown in FIG. 2, between the second section tubular 2 and the third tubular section 3.
  • the operation of the device is as follows: in the position shown in FIG. 1, the locking ring 10 is away from the conical bearing 8. In this position, the locking ring 10 slides freely, without significant friction, in the first tubular section 1.
  • the second tubular section 2 which is axially integral with the locking ring 10 and the end piece 7, slides freely in the first tubular section 1-
  • the user causes a relative rotation of the second tubular section 2 in the first tubular section 1.
  • the ring locking 10 remains integral in rotation with the first tubular section 1, and is therefore screwed onto the threaded part 9, when the rotation is in the direction of screwing.
  • the locking ring 10 comes to bear against the conical bearing 8, which causes the flaring of the end zone 12.
  • This end zone 12 comes to bear against the internal surface 5 of the first tubular section 1 , ensuring high friction preventing any subsequent axial sliding of the tubular sections into one another.
  • a similar locking is obtained by relative rotation of the third tubular section 3 in the second tubular section 2.
  • the expandable member is a locking ring 10.
  • the actuator member comprises a first actuator element consisting of a nut 35 which is screwed onto the threaded part 9 of the axial end piece 7 forming the second actuator element.
  • the nut 35 is shaped to slide axially in an axial passage 36 of the ring 10 while being locked in rotation relative to said ring 10.
  • the nut 35 advantageously comprises a prismatic outer surface, for example in hexagon , the axial passage 36 having a corresponding hexagonal section, as illustrated in FIG. 8.
  • the ring 10 has, on its external surface, longitudinal locking grooves receiving the corresponding internal ribs of the first tubular section 1, as in the embodiment of Figures 1 and 2.
  • the nut 35 is locked in rotation in the first tubular section 1 indirectly via the ring 10, and it bears against an end surface of the ring 10, namely the bottom of the axial passage 36.
  • the ring 10 comprises a central part 37 whose axial hole is substantially cylindrical, and two end parts 38 and 139 whose axial hole is of larger diameter and is connected to the central part hole 37 by a first generally conical bearing 39 and a second generally conical bearing 40.
  • the first generally conical bearing 39 bears on the corresponding conical bearing 8 of the axial end piece 7.
  • the second generally conical bearing 40 of the ring 10 bears against a corresponding conical bearing 41 of the nut 35.
  • the first conical bearing surface 39 of the ring 10 is associated with a first series of slots such as the slot 25.
  • the second conical bearing surface 40 of the ring 10 is associated with a second series of longitudinal slots such as the slots 42 and 43, also allowing the radial expansion of the ring 10.
  • the slots 25 of the first series of slots are nested relative to the slots 42 and 43 of the second series of slots.
  • the conical surfaces 39 and 40 of the ring 10 are arranged substantially at one third and two thirds of the length of the ring. This results in a significant increase in the area of friction of the ring on the internal face of the first tubular section
  • Figures 13 to 18 illustrate six embodiments, shown schematically in longitudinal section, only the elements involved in the locking being shown.
  • the expandable element is a locking ring 10, generally cylindrical, provided with an axial bore.
  • the ring 10 is made of elastomer, and it slides with little play in the first tubular section 1.
  • the actuator member comprises a first actuator element constituted by a nut 35, and comprises a second actuator element constituted by the end piece 7, fixed in the second tubular section 2.
  • L 1 nut 35 has the locking grooves, not shown in the figure, which receive the locking ribs 6, 13, 14 of the first tubular section 1.
  • L 1 nut 35 bears against a surface end of the ring 10.
  • the elastomer ring 10 is pressed axially between the nut 35 and the base of the axial end piece 7, when the nut 35 is screwed onto the threaded part of the axial end piece 7, causing the radial expansion of the ring 10 and the locking of the tubular elements 1 and 2 relative to each other.
  • the expandable locking element formed by the ring 10 is similar to that of FIG. 13, and is pressed axially by the actuating member also in a similar manner.
  • the actuator member comprises a first actuator element consisting of a screw 135, the head 136 of which has on its outer surface the locking grooves receiving the locking ribs 6, 13, 14 of the first tubular element 1.
  • the rod 137 is screwed into a threaded bore of the second actuator element 107.
  • the ring 10- may have a smooth peripheral surface, devoid of longitudinal grooves.
  • the expandable locking element is a locking ring with a smooth internal bore and the external surface of which comprises the longitudinal peripheral blocking grooves receiving the internal locking ribs 6, 13, 14 of the first tubular element 1.
  • the actuator member has a structure similar to that of the embodiment of FIG. 6, with a first actuator element 35 formed from a nut hexagon sliding axially in a corresponding axial passage 36 of the ring 10, and with a nozzle 7 forming the second actuator element.
  • the nut 35 is screwed onto a threaded part 9 of the end piece.
  • the nut 35 is integral in rotation with the ring 10 which is itself integral in rotation with the first tubular element
  • the actuator member comprises a screw 235 whose hexagon head 236 is housed in a corresponding housing of the ring 10, and whose rod 237 is screwed into a threaded bore of the endpiece 207 forming the second actuator element.
  • FIG. 17 illustrates an embodiment in which the ring 10 itself forms the first actuator element, and comprises a head provided with locking grooves, and a threaded rod 100 screwing into a corresponding tapped bore of a nozzle 307 forming the second actuator element.
  • the tip 307 has a generally conical bearing 308 cooperating with a generally conical inner bearing 309 of the ring 10, to cause its expansion.
  • FIG. 18 illustrates an embodiment similar to that of FIG. 13, in which the ring 10 has, in the vicinity of its two axial ends, tapered inner bearing surfaces to cooperate with corresponding generally tapered outer bearing surfaces of the nut 35 and tip 7.
  • a further increased locking efficiency can be obtained by using an elastomer locking ring, and by using an actuating member which acts on said ring simultaneously by exerting axial compression against its two end faces, and by exerting a radial thrust towards the outside on the inside face of its axial bore, by corresponding generally conical surfaces. It is thus possible to distribute in a more appropriate and regular manner the radial deformations of the ring, which is applied very effectively on the inner face of the first tubular element. Such an action can for example be carried out in the embodiment of Figure 18.
  • a sealing ring 26 is fitted around the end of the first tubular section 1 of large diameter. The ring 26 can rotate axially relative to the first tubular section 1, as in the embodiment of Figures 1 and 2.
  • the seal is provided by a seal ring 45, adapted around the end of the first tubular section 1 of large diameter on which it is secured in rotation and in translation.
  • the ring 45 has a return 46 from covering a splined annular spacer 47 inserted between the return 46 of said ring 45 and the edge of the first section 1 of large diameter.
  • the spacer 47 can slide on the second section 2 of small diameter with respect to which it is locked in rotation by the engagement of its internal splines with the external splines of the second tubular section 2, thus ensuring good sealing.
  • the present invention is not limited to the embodiments which have been explicitly described, but it includes the various variants and generalizations thereof contained in the field of claims below.

Landscapes

  • Mutual Connection Of Rods And Tubes (AREA)
  • Particle Accelerators (AREA)
  • Joints Allowing Movement (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Pens And Brushes (AREA)
  • Switches With Compound Operations (AREA)
  • Walking Sticks, Umbrellas, And Fans (AREA)

Abstract

PCT No. PCT/FR92/00328 Sec. 371 Date Jan. 24, 1994 Sec. 102(e) Date Jan. 24, 1994 PCT Filed Apr. 14, 1992 PCT Pub. No. WO92/20413 PCT Pub. Date Nov. 26, 1992.The present invention concerns telescopic tubular assemblies comprising a plurality of successive tubular sections sliding one inside the other between a retracted position and a deployed position. One non-limiting example of such assemblies is a ski stick.

Description

ENSEMBLE TUBULAIRE TELESCOPIQUE A CANNELURESTELESCOPIC TUBULAR ASSEMBLY WITH GROOVES
La présente invention concerne les ensembles tubulaires téles- copiques, tels que, par exemple mais non limitativement, les bâtons utilisés pour le ski de randonnée ou l'alpinisme, comprenant plusieurs tronçons tubulaires successifs et coulissant les uns dans les autres entre une position rétractée et une position déployée.The present invention relates to telescopic tubular assemblies, such as, for example but not limited to, the poles used for ski touring or mountaineering, comprising several successive tubular sections and sliding in each other between a retracted position and a deployed position.
Ces bâtons télescopiques sont utilisés pour régler la longueur du bâton en fonction de la pente du terrain sur lequel évolue l'utilisateur. Le bâton est destiné à supporter un effort axial. En conséquen¬ ce, des moyens de verrouillage sélectifs doivent permettre de bloquer axialement les tronçons les .uns par rapport aux autres, soit en position déployée, soit en position rétractée, soit en toutes positions intermé¬ diaires. On a déjà proposé diverses structures assurant le verrouillage des tronçons les uns dans les autres. Dans la plupart de ces structures, un embout axial est fixé en prolongement d'un premier tronçon tubulaire de petit diamètre. L'embout comporte généralement une portée conique et une partie filetée. Une bague expansible de verrouillage est montée à coulissement axial dans le tronçon tubulaire de gros diamètre, et comporte une portée intérieure généralement conique venant en appui contre la portée conique de l'embout axial. Un moyen actionneur tel qu'un écrou est adapté pour coulisser axialement dans le tronçon tubulaire de gros diamètre et être bloqué en rotation dans ce tronçon tubulaire, le moyen actionneur se vissant sur la partie filetée de l'embout axial pour serrer et desserrer axialement la bague par rotation relative des tronçons tubulaires.These telescopic poles are used to adjust the length of the pole according to the slope of the terrain on which the user is moving. The stick is intended to support an axial force. Consequently, selective locking means must allow the sections to be axially blocked in relation to the others, either in the deployed position, or in the retracted position, or in all intermediate positions. Various structures have already been proposed ensuring the locking of the sections into one another. In most of these structures, an axial end piece is fixed as an extension of a first tubular section of small diameter. The nozzle generally has a conical bearing and a threaded part. An expandable locking ring is mounted to slide axially in the tubular section of large diameter, and has a generally conical inner bearing bearing against the conical bearing of the axial end piece. An actuator means such as a nut is adapted to slide axially in the tubular section of large diameter and be locked in rotation in this tubular section, the actuator means screwing onto the threaded part of the axial end piece to axially tighten and loosen the ring by relative rotation of the tubular sections.
Par exemple, dans le document FR-A-929 616, le moyen actionneur est constitué par la bague de verrouillage elle-même, qui frotte sur la paroi intérieure du tube de gros diamètre. Le blocage en rotation de la bague s'avère aléatoire.For example, in document FR-A-929 616, the actuator means is constituted by the locking ring itself, which rubs against the inner wall of the large diameter tube. The blocking in rotation of the ring turns out to be random.
Dans le document DE-A-2 407 464, le moyen actionneur est également constitué par la bague elle-même, qui se trouve bloquée en rotation dans le tube de gros diamètre par une nervure longitudinale dépassant de la face intérieure du tube et venant se loger dans une rainure longitudinale de la bague. Dans cette structure, la nervure intérieure du tube de gros diamètre constitue une gêne dans le guidage et le coulissement du tube de petit diamètre à l'intérieur du tube de gros diamètre. Il se produit alors un mauvais guidage entre les deux tubes, qui ne sont pas concentriques. Lors d'efforts de flexion sur le bâton, la nervure intérieure déforme le tube de petit diamètre et le détériore- Dans le document DE-B-1 058 889, le moyen actionneur est également la bague de verrouillage elle-même, qui peut coulisser dans le tube de gros diamètre et est bloquée en rotation dans ce tube par deux nervures diamétralement opposées dans la bague et s'insérant dans deux rainures ménagées dans la face intérieure du tube de gros diamètre. Des nervures extérieures dépassent de la surface extérieure du tube de gros diamètre, en correspondance avec les rainures intérieures. Une telle disposition peut convenir pour un bâton ne comportant que deux tronçons. Toutefois, les nervures extérieures du tube de gros diamètre empêche- raient l'adaptation et le maintien correct d'un troisième tube par dessus ce tube de gros diamètre.In document DE-A-2 407 464, the actuator means also consists of the ring itself, which is locked in rotation in the large diameter tube by a longitudinal rib projecting from the inside of the tube and coming lodge in a longitudinal groove in the ring. In this structure, the inner rib of the large-diameter tube constitutes a hindrance in guiding and sliding the small diameter tube inside the large diameter tube. There is then poor guidance between the two tubes, which are not concentric. During bending forces on the stick, the internal rib deforms the tube of small diameter and deteriorates it. In document DE-B-1 058 889, the actuating means is also the locking ring itself, which can slide. in the large diameter tube and is locked in rotation in this tube by two diametrically opposite ribs in the ring and fitting into two grooves made in the inner face of the large diameter tube. Outer ribs protrude from the outer surface of the large diameter tube, in correspondence with the inner grooves. Such an arrangement may be suitable for a stick having only two sections. However, the outer ribs of the large diameter tube would prevent the adaptation and proper maintenance of a third tube over this large diameter tube.
Le problème proposé par la présente invention est de concevoir une nouvelle structure de verrouillage qui assure à la fois un bon guidage des tubes l'un par rapport à l'autre, sans faire subir de contraintes mécaniques exagérées à la bague de verrouillage, la structure étant en outre compatible avec la présence de trois ou plus de trois tubes successifs.The problem proposed by the present invention is to design a new locking structure which ensures both good guidance of the tubes relative to each other, without subjecting the locking ring to undue mechanical stress, the structure being further compatible with the presence of three or more of three successive tubes.
De tels bâtons étant utilisés parfois dans des conditions extrêmes, il est important que le verrouillage et le déverrouillage des tronçons les uns dans les autres soient particulièrement fiables, pour éviter tout coulissement intempestif des tronçons les uns dans les autres et pour éviter tout coincement intempestif.Since such sticks are sometimes used in extreme conditions, it is important that the locking and unlocking of the sections into one another is particularly reliable, to avoid any untimely sliding of the sections into one another and to avoid any untimely jamming.
Pour atteindre ces objets ainsi que d'autres, un ensemble tubulaire télescopique selon l'invention comprend : - au moins un premier tronçon tubulaire de grand diamètre et un second tronçon tubulaire de plus petit diamètre, le second tronçon tubulaire ayant une, extrémité intérieure logée à l'intérieur du premier tronçon tubulaire et étant monté à rotation libre et à coulissement dans le premier tronçon tubulaire entre une position rétractée et une position déployée,To achieve these and other objects, a telescopic tubular assembly according to the invention comprises: - at least a first tubular section of large diameter and a second tubular section of smaller diameter, the second tubular section having an inner end housed inside the first tubular section and being mounted for free rotation and sliding in the first tubular section between a retracted position and a deployed position,
- un organe actionneur, comprenant un premier élément actionneur monté à coulissement dans le premier tronçon tubulaire de plus grand diamètre et comprenant un second élément actionneur fixe du second tronçon tubulaire de plus petit diamètre, le premier et le second éléments actionneurs coopérant l'un et l'autre par vissage pour déplacer axialement le premier élément actionneur lors d'une rotation relative axiale, - un élément expansible de verrouillage, monté à coulissement axial dans le premier tronçon tubulaire de plus grand diamètre, solidaire en translation axiale du second tronçon tubulaire de plus petit diamètre, et sollicité par le premier élément actionneur de l'organe actionneur provoquant sélectivement son expansion radiale ou sa rétraction lors de ses mouvements axiaux,an actuator member, comprising a first actuator element mounted to slide in the first tubular section of larger diameter, and comprising a second fixed actuator element of the second tubular section of smaller diameter, the first and second actuator elements cooperating with each other by screwing to axially move the first actuator element during an axial relative rotation, - an element expandable locking device, mounted with axial sliding in the first tubular section of larger diameter, integral in axial translation with the second tubular section of smaller diameter, and urged by the first actuating element of the actuating member selectively causing its radial expansion or its retraction during its axial movements,
- des moyens de blocage en rotation pour assurer la solidarisation en rotation du premier élément actionneur dans le premier tronçon tubulaire de plus grand diamètre ; selon l'invention : - la surface intérieure du premier tronçon tubulaire de plus grand diamètre comprend au moins trois nervures longitudinales réparties régulièrement selon son pourtour, chaque nervure s'engageant dans une rainure périphérique longitudinale respective de blocage du premier élément actionneur pour son blocage en rotation, - lesdites nervures occupent toute ou la plus grande partie de la longueur du premier tronçon tubulaire, les nervures sont conformées pour venir en appui à faible jeu et simultanément contre la surface extérieure du second tronçon tubulaire de plus petit diamètre, - lesdites nervures présentent une surface de crête large et arrondie pour épouser une partie significative du pourtour de la surface extérieure du second tronçon tubulaire et constituer entre les tronçons tubulaires une surface d'appui propre à supporter les contraintes mécaniques de flexion subies par l'ensemble tubulaire télescopique. Selon cette structure, les nervures intérieures du tube de plus grand diamètre, formant des cannelures, constituent donc à la fois des moyens de- blocage en rotation du premier élément actionneur, et des moyens appropriés de guidage et de maintien du tube de plus petit diamètre lors de son coulissement dans le tube de plus grand diamètre. Les nervures intérieures des tronçons tubulaires sont avanta¬ geusement formées par enfoncement de la paroi du tronçon tubulaire, formant simultanément des rainures extérieures longitudinales de plus faible largeur que les nervures intérieures. La structure tubulaire cannelée ainsi obtenue est particulièrement rigide, sans augmentation de poids.- rotation locking means for securing in rotation the first actuator element in the first tubular section of larger diameter; according to the invention: - the internal surface of the first tubular section of larger diameter comprises at least three longitudinal ribs distributed regularly along its periphery, each rib engaging in a respective longitudinal peripheral groove for blocking the first actuator element for its blocking in rotation, - said ribs occupy all or most of the length of the first tubular section, the ribs are shaped to come into abutment with little play and simultaneously against the external surface of the second tubular section of smaller diameter, - said ribs have a wide and rounded ridge surface to match a significant part of the periphery of the outer surface of the second tubular section and constitute between the tubular sections a bearing surface capable of supporting the mechanical bending stresses undergone by the telescopic tubular assembly. According to this structure, the internal ribs of the tube of larger diameter, forming grooves, therefore constitute both means for locking the rotation of the first actuator element, and suitable means for guiding and holding the tube of smaller diameter. when it slides in the larger diameter tube. The inner ribs of the tubular sections are advantageously formed by driving in the wall of the tubular section, simultaneously forming more longitudinal outer grooves narrower than the inner ribs. The fluted tubular structure thus obtained is particularly rigid, without any increase in weight.
Cette structure reste compatible avec l'existence de plus de deux tronçons successifs, en prévoyant que les rainures extérieures du tube de plus petit diamètre sont plus étroites que les nervures intérieures du tube de plus gros diamètre dans une zone de jonction, évitant leur engagement mutuel.This structure remains compatible with the existence of more than two successive sections, by providing that the outer grooves of the tube of smaller diameter are narrower than the inner ribs of the tube of larger diameter in a junction zone, avoiding their mutual engagement. .
Cette structure est compatible avec divers modes de réalisation de l'organe actionneur et de l'élément expansible tels que décrits et revendiqués ci-après.This structure is compatible with various embodiments of the actuator member and of the expandable element as described and claimed below.
D'autres objets, caractéristiques et avantages de la présente invention ressortiront de la description suivante d'un mode de réalisa¬ tion particulier, faite en relation avec les figures jointes, parmi lesquelles :Other objects, characteristics and advantages of the present invention will emerge from the following description of a particular embodiment, made in relation to the attached figures, among which:
- la figure 1 est une vue de face, en coupe partielle, de la zone de verrouillage entre deux tronçons successifs du bâton télescopique selon un mode de réalisation de la présente invention ;- Figure 1 is a front view, in partial section, of the locking zone between two successive sections of the telescopic stick according to an embodiment of the present invention;
- la figure 2 est une vue similaire d'une seconde zone de verrouillage de bâton selon la présente invention ;- Figure 2 is a similar view of a second stick locking zone according to the present invention;
- la figure 3 est une vue en bout de la bague de verrouillage, dans la direction représentée par la flèche A de la figure 1 ;- Figure 3 is an end view of the locking ring, in the direction shown by arrow A in Figure 1;
- la figure 4 illustre le coulissement des tronçons respectifs les uns dans les autres, en coupe transversale ; - la figure 5 est une coupe dans le plan B-B de la figure 1 ;- Figure 4 illustrates the sliding of the respective sections in each other, in cross section; - Figure 5 is a section in the plane B-B of Figure 1;
- la figure 6 est une vue de face en coupe partielle de la zone de verrouillage entre deux tronçons successifs selon un autre mode de réalisation de la présente invention j- Figure 6 is a front view in partial section of the locking zone between two successive sections according to another embodiment of the present invention j
- la figure 7 est une vue de face éclatée de la structure de la figure 6 ;- Figure 7 is an exploded front view of the structure of Figure 6;
- la figure 8 est une vue en bout de l'écrou de serrage de la figure 7 ;- Figure 8 is an end view of the tightening nut of Figure 7;
- la figure 9 est une coupe transversale selon le plan C-C de la figure 7 ;- Figure 9 is a cross section along the plane C-C of Figure 7;
- la figure 10 est une coupe transversale selon le plan D-D de la figure 7 ;- Figure 10 is a cross section along the plane D-D of Figure 7;
- la figure 11 est une vue de face en coupe partielle montrant une structure de bague d'étanchéité selon un premier mode de réalisation ; - la figure 12 est une vue de face en coupe partielle montrant une structure de bague d'étanchéité selon un second mode de réalisation ; et- Figure 11 is a front view in partial section showing a sealing ring structure according to a first embodiment; - Figure 12 is a front view in partial section showing a sealing ring structure according to a second embodiment; and
- les figures 13 à 18 illustrent schématiquement six autres modes de réalisation de l'organe actionneur et de l'élément expansible. Dans le mode de réalisation représenté sur les figures, l'ensemble tubulaire télescopique selon la présente invention est un bâton comprenant trois tronçons successifs, à savoir un premier tronçon tubulaire 1 de plus grand diamètre, un second tronçon tubulaire 2 de plus petit diamètre, et un troisième tronçon tubulaire 3 de diamètre encore plus petit. Le second tronçon 2 est monté à coulissement dans le premier tronçon 1. Le troisième tronçon 3 est monté à coulissement dans le second tronçon 2. Une portion du second tronçon 2 reste en permanence à l'intérieur du premier tronçon 1, et elle comprend une extrémité intérieure 4. Le premier tronçon tubulaire 1 de plus grand diamètre présente une surface intérieure 5 cylindrique de section généralement circulaire, comprenant au moins trois nervures longitudinales 6, 13 et 14 occupant toute ou la plus grande partie de sa longueur, et de faible hauteur.- Figures 13 to 18 schematically illustrate six other embodiments of the actuator member and the expandable element. In the embodiment shown in the figures, the telescopic tubular assembly according to the present invention is a stick comprising three successive sections, namely a first tubular section 1 of larger diameter, a second tubular section 2 of smaller diameter, and a third tubular section 3 of even smaller diameter. The second section 2 is slidably mounted in the first section 1. The third section 3 is slidably mounted in the second section 2. A portion of the second section 2 remains permanently inside the first section 1, and it includes a inner end 4. The first tubular section 1 of larger diameter has a cylindrical inner surface 5 of generally circular section, comprising at least three longitudinal ribs 6, 13 and 14 occupying all or most of its length, and of low height .
Le second tronçon tubulaire 2, de plus petit diamètre, présente une surface extérieure 60 cylindrique, de section généralement circulai¬ re, conformée pour coulisser axialement dans l'espace intérieur limité par la surface intérieure 5 et les nervures longitudinales 6, 13 et 14 du premier tronçon tubulaire 1 de grand diamètre.The second tubular section 2, of smaller diameter, has a cylindrical outer surface 60, of generally circular section, shaped to slide axially in the interior space limited by the interior surface 5 and the longitudinal ribs 6, 13 and 14 of the first tubular section 1 of large diameter.
Dans le mode de réalisation avantageux représenté sur les figures, la surface intérieure 5 du premier tronçon tubulaire 1 présente trois nervures longitudinales 6, 13 et 14 régulièrement réparties selon le pourtour du tronçon. Les trois nervures longitudinales 6, 13 et 14 s'engagent dans trois rainures correspondantes respectives 15, 16 et 17 de la bague de verrouillage 10. De préférence, les nervures 6, 13 et 14 sont formées par enfoncement de la paroi du tube formant le premier tronçon tubulaire 1, l'enfoncement réalisant simultanément les rainures extérieures longitudinales 18, 19 et 20. Les rainures extérieures longitudinales 18, 19 et 20 ont une largeur légèrement plus faible que les nervures intérieures correspondantes 6, 13 et 14. Les nervures 6, 13 et 14 doivent former la surface d'appui sur laquelle coulisse ou pivote le tronçon tubulaire intérieur 2. Cette surface d'appui doit être capable de supporter les contraintes mécani- ques de flexion que l'on désire appliquer entre deux tronçons successifs d'un bâton télescopique. Pour cela, comme le représentent les figures, les nervures 6, 13 et 14 présentent une surface de crête large et arrondie, pour épouser une partie significative du pourtour de la surface extérieure du second tronçon tubulaire. Les nervures 6, 13 et 14 sont conformées pour venir en appui à faible jeu et simultanément contre la surface extérieure du second tronçon tubulaire 2.In the advantageous embodiment shown in the figures, the inner surface 5 of the first tubular section 1 has three longitudinal ribs 6, 13 and 14 regularly distributed around the periphery of the section. The three longitudinal ribs 6, 13 and 14 engage in three respective corresponding grooves 15, 16 and 17 of the locking ring 10. Preferably, the ribs 6, 13 and 14 are formed by driving in the wall of the tube forming the first tubular section 1, the depression simultaneously producing the longitudinal external grooves 18, 19 and 20. The longitudinal external grooves 18, 19 and 20 have a slightly smaller width than the corresponding internal ribs 6, 13 and 14. The ribs 6, 13 and 14 must form the bearing surface on which the inner tubular section slides or pivots 2. This bearing surface must be capable of withstanding the mechanical stresses bending ques that you want to apply between two successive sections of a telescopic stick. For this, as shown in the figures, the ribs 6, 13 and 14 have a wide and rounded ridge surface, to match a significant part of the periphery of the outer surface of the second tubular section. The ribs 6, 13 and 14 are shaped to come into abutment with little play and simultaneously against the external surface of the second tubular section 2.
Le second tronçon tubulaire 2 comprend également des nervures et rainures similaires à celles du premier tronçon tubulaire. Toutefois, pour permettre la libre rotation du second tronçon tubulaire 2 dans le premier tronçon tubulaire 1, ses rainures extérieures 21, 22 et 23 sont plus étroites que les nervures intérieures 6, 13 et 14 du premier tronçon tubulaire 1. Ainsi, les nervures intérieures 6, 13 et 14 du premier tronçon tubulaire ne peuvent pas s'engager dans les rainures extérieures correspondantes 21, 22 et 23 du second tronçon tubulaire, qui peut ainsi librement pivoter axialement dans le premier tronçon tubulaire 1.The second tubular section 2 also includes ribs and grooves similar to those of the first tubular section. However, to allow free rotation of the second tubular section 2 in the first tubular section 1, its outer grooves 21, 22 and 23 are narrower than the inner ribs 6, 13 and 14 of the first tubular section 1. Thus, the inner ribs 6, 13 and 14 of the first tubular section cannot engage in the corresponding external grooves 21, 22 and 23 of the second tubular section, which can thus freely pivot axially in the first tubular section 1.
Dans le mode de réalisation des figures 1 à 10, le second tronçon tubulaire 2 porte, en prolongement de son extrémité intérieure 4, un embout axial 7 comportant une portée généralement conique 8 se prolongeant par une partie filetée 9, par exemple de plus petit diamètre.In the embodiment of FIGS. 1 to 10, the second tubular section 2 carries, as an extension of its internal end 4, an axial end piece 7 having a generally conical surface 8 extended by a threaded part 9, for example of smaller diameter .
Une bague de verrouillage 10 taraudée est vissée sur la partie filetée 9 de l'embout axial 7, et elle comprend une surface extérieure 11 généralement cylindrique conformée pour coulisser axialement à faible jeu dans le premier tronçon tubulaire 1 et pour être bloquée en rotation par les nervures intérieures 6, 13 et 14 du premier tronçon tubulaire 1. La bague de verrouillage 10 comprend une zone d'extrémité 12 élastique- ment déformable dans la direction radiale, et orientée axialement pour venir en appui sur la portée conique 8.A threaded locking ring 10 is screwed onto the threaded part 9 of the axial end piece 7, and it comprises a generally cylindrical outer surface 11 shaped to slide axially with little play in the first tubular section 1 and to be locked in rotation by the inner ribs 6, 13 and 14 of the first tubular section 1. The locking ring 10 comprises an end region 12 which is elastically deformable in the radial direction, and oriented axially to bear on the conical bearing 8.
La bague de verrouillage 10 comprend un alésage central 37 taraudé, p,our coopérer avec le filetage de la partie filetée 9, et une première portée généralement conique 39 pour coopérer avec la portée conique 8. Ainsi, la bague 10 est vissée sur la partie filetée 9. La longueur de la bague de verrouillage 10 est légèrement inférieure à la longueur de la partie filetée 9. L'extrémité libre 24 de la partie filetée 9 comprend une partie élargie, de diamètre supérieur au diamètre intérieur de la bague de verrouillage 10 pour former butée limitant la course de la bague à l'écart de la portée conique 8.The locking ring 10 includes a threaded central bore 37, p, to cooperate with the thread of the threaded part 9, and a first generally conical bearing 39 to cooperate with the conical bearing 8. Thus, the ring 10 is screwed onto the part threaded 9. The length of the locking ring 10 is slightly less than the length of the threaded portion 9. The free end 24 of the threaded portion 9 comprises an enlarged portion, of diameter greater than the diameter inside of the locking ring 10 to form a stop limiting the stroke of the ring away from the conical bearing 8.
La bague de verrouillage 10 comprend, dans sa zone d'extrémitéThe locking ring 10 comprises, in its end zone
12, des fentes longitudinales telles que la fente 25, pour augmenter la souplesse de cette zone d'extrémité. On favorise ainsi les déformations radiales de la zone d'extrémité 12 par l'effet de la portée conique 8 en fin de vissage de la bague de verrouillage 10 sur la partie filetée 9.12, longitudinal slots such as the slot 25, to increase the flexibility of this end region. Radial deformations of the end zone 12 are thus favored by the effect of the conical bearing 8 at the end of the screwing of the locking ring 10 on the threaded part 9.
Dans ce mode de réalisation, la bague 10 constitue l'élément expansible et le premier élément actionneur, tandis que l'embout 7 constitue le second élément actionneur.In this embodiment, the ring 10 constitutes the expandable element and the first actuator element, while the end piece 7 constitutes the second actuator element.
Selon un mode de réalisation représenté sur les figures 1 et 2, l'embout 7 est un embout rapporté, engagé en force dans l'extrémité intérieure 4 du second tronçon tubulaire 2.According to an embodiment shown in FIGS. 1 and 2, the endpiece 7 is an attached endpiece, forcibly engaged in the interior end 4 of the second tubular section 2.
Une bague d'étanchéité 26 est adaptée sur l'extrémité de recouvrement 27 du premier tronçon tubulaire 1, auquel elle est solidarisée axialement. Pour assurer sa solidarisation axiale, la bague d'étanchéité 26 comprend un rebord intérieur 28 venant s'engager dans une gorge annulaire extérieure 29 du premier tronçon tubulaire 1. La face extrême 30 de la bague d'étanchéité 26 comprend une ouverture 31 dont la section correspond à la section extérieure du second tronçon tubulaire 2, de façon à coulisser à faible jeu sur la surface extérieure du second tronçon tubulaire 2.A sealing ring 26 is fitted on the covering end 27 of the first tubular section 1, to which it is secured axially. To ensure its axial connection, the sealing ring 26 comprises an inner rim 28 which engages in an external annular groove 29 of the first tubular section 1. The end face 30 of the sealing ring 26 comprises an opening 31, the opening of which section corresponds to the outside section of the second tubular section 2, so as to slide with little play on the outside surface of the second tubular section 2.
Une butée limite le déplacement de la bague de verrouillage 10 vers la position déployée du bâton. Par exemple, la butée est réalisée par une saignée 32 ou un poinçonnage sur la surface du premier tronçon tubulaire 1, produisant un ergot dépassant de la face intérieure du premier tronçon tubulaire 1 et contre lequel vient porter la zone d'extrémité 12 de la bague de verrouillage 10.A stop limits the movement of the locking ring 10 to the deployed position of the stick. For example, the stop is produced by a groove 32 or a punching on the surface of the first tubular section 1, producing a lug protruding from the interior face of the first tubular section 1 and against which the end region 12 of the ring comes to bear. lock 10.
Un autre mode de réalisation de butée est représenté sur les figures 1 et 2, sous forme d'une ou plusieurs languettes 33, solidaires de la bague d'étanchéité 26, et venant se loger dans l'espace formé par la rainure extérieure 22 du second tronçon tubulaire 2. La languette 33 vient porter, en bout de course, contre la zone d'extrémité 12 de la bague de verrouillage 10. Une structure de verrouillage similaire est prévue, telle que représentée sur la figure 2, entre le second tronçon tubulaire 2 et le troisième tronçon tubulaire 3. Le fonctionnement du dispositif est le suivant : dans la position représentée sur la figure 1, la bague de verrouillage 10 est à l'écart de la portée conique 8. Dans cette position, la bague de verrouillage 10 coulisse librement, sans frottement important, dans le premier tronçon tubulaire 1. Il en résulte que le second tronçon tubulaire 2, qui est solidaire axialement de la bague de verrouillage 10 et de l'embout 7, coulisse librement dans le premier tronçon tubulaire 1- Pour obtenir le verrouillage des tronçons successifs les uns par rapport aux autres, lorsque la longueur désirée du bâton a été obtenue par coulissement axial, l'utilisateur provoque une rotation relative du second tronçon tubulaire 2 dans le premier tronçon tubulaire 1. Lors de la rotation du second tronçon tubulaire 2, la bague de verrouillage 10 reste solidaire en rotation du premier tronçon tubulaire 1, et se visse donc sur la partie filetée 9, lorsque la rotation est dans le sens du vissage. En fin de vissage, la bague de verrouillage 10 vient porter contre la portée conique 8, qui provoque l'évasement de la zone d'extrémité 12. Cette zone d'extrémité 12 vient en appui contre la surface intérieure 5 du premier tronçon tubulaire 1, assurant un frottement important empêchant tout coulissement axial ultérieur des tronçons tubulaires les uns dans les autres. Un verrouillage similaire est obtenu par rotation relative du troisième tronçon tubulaire 3 dans le second tronçon tubulaire 2.Another embodiment of abutment is shown in FIGS. 1 and 2, in the form of one or more tongues 33, integral with the sealing ring 26, and coming to be housed in the space formed by the outer groove 22 of the second tubular section 2. The tongue 33 comes to bear, at the end of its travel, against the end region 12 of the locking ring 10. A similar locking structure is provided, as shown in FIG. 2, between the second section tubular 2 and the third tubular section 3. The operation of the device is as follows: in the position shown in FIG. 1, the locking ring 10 is away from the conical bearing 8. In this position, the locking ring 10 slides freely, without significant friction, in the first tubular section 1. As a result, the second tubular section 2, which is axially integral with the locking ring 10 and the end piece 7, slides freely in the first tubular section 1- To lock the successive sections relative to each other, when the desired length of the stick has been obtained by axial sliding, the user causes a relative rotation of the second tubular section 2 in the first tubular section 1. During the rotation of the second tubular section 2, the ring locking 10 remains integral in rotation with the first tubular section 1, and is therefore screwed onto the threaded part 9, when the rotation is in the direction of screwing. At the end of screwing, the locking ring 10 comes to bear against the conical bearing 8, which causes the flaring of the end zone 12. This end zone 12 comes to bear against the internal surface 5 of the first tubular section 1 , ensuring high friction preventing any subsequent axial sliding of the tubular sections into one another. A similar locking is obtained by relative rotation of the third tubular section 3 in the second tubular section 2.
Le déverrouillage est obtenu aisément par rotation des éléments tubulaires successifs les uns par rapport aux autres dans le sens inverse provoquant le dévissage des bagues de verrouillage 10 sur les parties filetées 9 d'embout 7.Unlocking is easily obtained by rotation of the successive tubular elements with respect to each other in the opposite direction, causing the locking rings 10 to be unscrewed on the threaded parts 9 of the end piece 7.
En fin de dévissage de la bague de verrouillage 10, si l'utilisateur poursuit la rotation relative des tronçons tubulaires les uns par rapport aux autres, la bague de verrouillage 10 vient porter contre la partie élargie 24 de l'embout 7, interdisant toute rotation axiale supplémentaire et toute désolidarisation de la bague de verrouil¬ lage 10 par rapport au second tronçon tubulaire 2.At the end of unscrewing the locking ring 10, if the user continues the relative rotation of the tubular sections relative to each other, the locking ring 10 comes to bear against the enlarged part 24 of the end piece 7, preventing any rotation additional axial and any separation of the locking ring 10 relative to the second tubular section 2.
Le coulissement des tronçons successifs les uns dans les autres est limité, dans le sens de la séparation des tronçons les uns par rapport aux autres, par les butées telles que la saignée 32 ou la languette 33 venant porter contre la zone d'extrémité 12 de la bague de verrouillage 10. Dans le mode de réalisation représenté sur les figures 6 à 10, l'élément expansible est une bague 10 de verrouillage. L'organe actionneur comprend un premier élément actionneur constitué d'un écrou 35 se vissant sur la partie filetée 9 de l'embout axial 7 formant le second élément actionneur. L'écrou 35 est conformé pour coulisser axialement dans un passage axial 36 de la bague 10 tout en étant bloqué en rotation par rapport à ladite bague 10. Pour cela, l'écrou 35 comporte avantageusement une surface extérieure prismatique, par exemple en six pans, le passage 36 axial ayant une section hexagonale correspondante, comme illustré sur la figure 8. La bague 10 comporte, sur sa surface extérieure, des rainures longitudinales de blocage recevant les nervures intérieures correspondantes du premier tronçon tubulaire 1, comme dans le mode de réalisation des figures 1 et 2. Ainsi, l'écrou 35 est bloqué en rotation dans le premier tronçon tubulaire 1 indirectement par l'intermédiaire de la bague 10, et il porte contre une surface d'extrémité de la bague 10, à savoir le fond du passage axial 36.The sliding of the successive sections into one another is limited, in the direction of the separation of the sections from one another, by the stops such as the groove 32 or the tongue 33 coming to bear against the end zone 12 of the locking ring 10. In the embodiment shown in Figures 6 to 10, the expandable member is a locking ring 10. The actuator member comprises a first actuator element consisting of a nut 35 which is screwed onto the threaded part 9 of the axial end piece 7 forming the second actuator element. The nut 35 is shaped to slide axially in an axial passage 36 of the ring 10 while being locked in rotation relative to said ring 10. For this, the nut 35 advantageously comprises a prismatic outer surface, for example in hexagon , the axial passage 36 having a corresponding hexagonal section, as illustrated in FIG. 8. The ring 10 has, on its external surface, longitudinal locking grooves receiving the corresponding internal ribs of the first tubular section 1, as in the embodiment of Figures 1 and 2. Thus, the nut 35 is locked in rotation in the first tubular section 1 indirectly via the ring 10, and it bears against an end surface of the ring 10, namely the bottom of the axial passage 36.
Dans ce mode de réalisation, la bague 10 comporte une partie centrale 37 dont le trou axial est sensiblement cylindrique, et deux parties d'extrémité 38 et 139 dont le trou axial est de plus grand diamètre et se raccorde au trou de partie centrale 37 par une première portée généralement conique 39 et une seconde portée généralement conique 40. La première portée généralement conique 39 vient en appui sur la portée conique correspondante 8 de l'embout axial 7. La seconde portée généralement conique 40 de la bague 10 vient en appui contre une portée conique correspondante 41 de 1*écrou 35.In this embodiment, the ring 10 comprises a central part 37 whose axial hole is substantially cylindrical, and two end parts 38 and 139 whose axial hole is of larger diameter and is connected to the central part hole 37 by a first generally conical bearing 39 and a second generally conical bearing 40. The first generally conical bearing 39 bears on the corresponding conical bearing 8 of the axial end piece 7. The second generally conical bearing 40 of the ring 10 bears against a corresponding conical bearing 41 of the nut 35.
Comme dans le mode de réalisation de la figure 1, la première portée conique 39 de la bague 10 est associée a une première série de fentes telles que la fente 25. En outre, dans ce second mode de réalisation, la seconde portée conique 40 de la bague 10 est associée à une seconde série de fentes longitudinales telles que les fentes 42 et 43, autorisant également l'expansion radiale de la bague 10.As in the embodiment of FIG. 1, the first conical bearing surface 39 of the ring 10 is associated with a first series of slots such as the slot 25. Furthermore, in this second embodiment, the second conical bearing surface 40 of the ring 10 is associated with a second series of longitudinal slots such as the slots 42 and 43, also allowing the radial expansion of the ring 10.
Comme on le voit sur les figures 7 à 10, les fentes 25 de la première série de fentes sont imbriquées par rapport aux fentes 42 et 43 de la seconde série de fentes. Les portées coniques 39 et 40 de la bague 10 sont disposées sensiblement au tiers et aux deux tiers de la longueur de la bague. On obtient ainsi une augmentation sensible de la surface de frottement de la bague sur la face interne du premier tronçon tubulaireAs seen in Figures 7 to 10, the slots 25 of the first series of slots are nested relative to the slots 42 and 43 of the second series of slots. The conical surfaces 39 and 40 of the ring 10 are arranged substantially at one third and two thirds of the length of the ring. This results in a significant increase in the area of friction of the ring on the internal face of the first tubular section
1.1.
On conçoit que la structure de verrouillage selon la présente invention peut prendre plusieurs formes de réalisation. Les figures 13 a 18 illustrent six modes de réalisation, représentés schématiquement en coupe longitudinale, seuls les éléments intervenant dans le verrouillage étant représentés.It is understood that the locking structure according to the present invention can take several embodiments. Figures 13 to 18 illustrate six embodiments, shown schematically in longitudinal section, only the elements involved in the locking being shown.
Sur la figure 13, l'élément expansible est une bague de verrouillage 10, généralement cylindrique, munie d'un alésage axial. La bague 10 est réalisée en élastomère, et elle coulisse à faible jeu dans le premier tronçon tubulaire 1. L'organe actionneur comprend un premier élément actionneur constitué par un écrou 35, et comprend un second élément actionneur constitué par l'embout 7, fixé dans le second tronçon tubulaire 2. L1écrou 35 comporte les rainures de blocage, non représen- tées sur la figure, qui reçoivent les nervures de blocage 6, 13, 14 du premier tronçon tubulaire 1. L1écrou 35 porte contre une surface d'extrémité de la bague 10. La bague 10 en élastomère est pressée axialement entre l'écrou 35 et la base de l'embout axial 7, lors du vissage de l'écrou 35 sur la partie filetée de l'embout axial 7, provoquant l'expansion radiale de la bague 10 et le verrouillage des éléments tubulaires 1 et 2 l'un par rapport à l'autre.In FIG. 13, the expandable element is a locking ring 10, generally cylindrical, provided with an axial bore. The ring 10 is made of elastomer, and it slides with little play in the first tubular section 1. The actuator member comprises a first actuator element constituted by a nut 35, and comprises a second actuator element constituted by the end piece 7, fixed in the second tubular section 2. L 1 nut 35 has the locking grooves, not shown in the figure, which receive the locking ribs 6, 13, 14 of the first tubular section 1. L 1 nut 35 bears against a surface end of the ring 10. The elastomer ring 10 is pressed axially between the nut 35 and the base of the axial end piece 7, when the nut 35 is screwed onto the threaded part of the axial end piece 7, causing the radial expansion of the ring 10 and the locking of the tubular elements 1 and 2 relative to each other.
Dans le mode de réalisation de la figure 14, l'élément expansible de verrouillage formé par la bague 10 est similaire de celui de la figure 13, et est pressé axialement par l'organe actionneur également de manière similaire. Dans ce cas, l'organe actionneur comprend un premier élément actionneur constitué d'une vis 135 dont la tête 136 comporte sur sa surface extérieure les rainures de blocage recevant les nervures de blocage 6, 13, 14 du premier élément tubulaire 1. La tige 137 se visse dans un alésage taraudé du second élément actionneur 107.In the embodiment of FIG. 14, the expandable locking element formed by the ring 10 is similar to that of FIG. 13, and is pressed axially by the actuating member also in a similar manner. In this case, the actuator member comprises a first actuator element consisting of a screw 135, the head 136 of which has on its outer surface the locking grooves receiving the locking ribs 6, 13, 14 of the first tubular element 1. The rod 137 is screwed into a threaded bore of the second actuator element 107.
Dans ces deux modes de réalisation des figures 13 et 14, la bague 10- peut comporter une surface périphérique lisse, dépourvue de rainures longitudinales.In these two embodiments of Figures 13 and 14, the ring 10- may have a smooth peripheral surface, devoid of longitudinal grooves.
Par contre, dans les deux modes de réalisation des figures 15 et 16, l'élément expansible de verrouillage est une bague de verrouil¬ lage à alésage intérieur lisse et dont la surface extérieure comprend les rainures longitudinales périphériques de blocage recevant les nervures intérieures de blocage 6, 13, 14 du premier élément tubulaire 1. Sur la figure 15 l'organe actionneur a une structure similaire à celle du mode de réalisation de la figure 6, avec un premier élément actionneur 35 formé d'un écrou à six pans coulissant axialement dans un passage axial 36 correspondant de la bague 10, et avec un embout 7 formant le second élément actionneur. L'écrou 35 se visse sur une partie filetée 9 de l'embout. L'écrou 35 est solidaire en rotation de la bague 10 qui est elle-même solidaire en rotation du premier élément tubulaireOn the other hand, in the two embodiments of FIGS. 15 and 16, the expandable locking element is a locking ring with a smooth internal bore and the external surface of which comprises the longitudinal peripheral blocking grooves receiving the internal locking ribs 6, 13, 14 of the first tubular element 1. In FIG. 15, the actuator member has a structure similar to that of the embodiment of FIG. 6, with a first actuator element 35 formed from a nut hexagon sliding axially in a corresponding axial passage 36 of the ring 10, and with a nozzle 7 forming the second actuator element. The nut 35 is screwed onto a threaded part 9 of the end piece. The nut 35 is integral in rotation with the ring 10 which is itself integral in rotation with the first tubular element
1. Sur la figure 16, l'organe actionneur comprend une vis 235 dont la tête à six pans 236 est logée dans un logement correspondant de la bague 10, et dont la tige 237 se visse dans un alésage taraudé de l'embout 207 formant le second élément actionneur.1. In FIG. 16, the actuator member comprises a screw 235 whose hexagon head 236 is housed in a corresponding housing of the ring 10, and whose rod 237 is screwed into a threaded bore of the endpiece 207 forming the second actuator element.
La figure 17 illustre un mode de réalisation dans lequel la bague 10 forme elle-même le premier élément actionneur, et comporte une tête munie des rainures de blocage, et une tige filetée 100 se vissant dans un alésage taraudé correspondant d'un embout 307 formant le second élément actionneur. L'embout 307 comporte une portée généralement conique 308 coopérant avec une portée intérieure généralement conique 309 de la bague 10, pour provoquer son expansion.FIG. 17 illustrates an embodiment in which the ring 10 itself forms the first actuator element, and comprises a head provided with locking grooves, and a threaded rod 100 screwing into a corresponding tapped bore of a nozzle 307 forming the second actuator element. The tip 307 has a generally conical bearing 308 cooperating with a generally conical inner bearing 309 of the ring 10, to cause its expansion.
La figure 18 illustre un mode de réalisation similaire de celui de la figure 13, dans lequel la bague 10 comporte, au voisinage de ses deux extrémités axiales, des portées intérieures coniques pour coopérer avec des portées extérieures correspondantes généralement coniques de l'écrou 35 et de l'embout 7.FIG. 18 illustrates an embodiment similar to that of FIG. 13, in which the ring 10 has, in the vicinity of its two axial ends, tapered inner bearing surfaces to cooperate with corresponding generally tapered outer bearing surfaces of the nut 35 and tip 7.
Ces modes de réalisation sont donnés à titre d'exemple, et d'autres combinaisons des structures de premier élément actionneur, de second élément actionneur et d'élément expansible de verrouillage pourront être agencées d'autres manières aisément accessibles à l'homme du métier.These embodiments are given by way of example, and other combinations of the structures of the first actuator element, of the second actuator element and of the expandable locking element may be arranged in other ways easily accessible to those skilled in the art. .
Une efficacité encore accrue du verrouillage peut être obtenue en utilisant une bague de verrouillage en élastomère, et en utilisant un organe actionneur qui agit sur ladite bague simultanément en exerçant une compression axiale contre ses deux faces extrêmes, et en exerçant une poussée radiale vers l'extérieur sur la face intérieure de son alésage axial, par des portées généralement coniques correspondantes. On peut ainsi répartir de manière plus appropriée et régulière les déformations radiales de la bague, qui vient s'appliquer de manière très efficace sur la face intérieure du premier élément tubulaire. Une telle action peut par exemple être réalisée dans le mode de réalisation de la figure 18. Dans le mode de réalisation de la figure 11, une bague d'étanchéité 26 est adaptée autour de l'extrémité du premier tronçon 1 tubulaire de gros diamètre. La bague 26 peut tourner axialement par rapport au premier tronçon tubulaire 1, comme dans le mode de réalisation des figures 1 et 2. Dans le mode de réalisation de la figure 12, l'étanchéité est assurée par une bague d'étanchéité 45, adaptée autour de l'extrémité du premier tronçon tubulaire 1 de gros diamètre sur lequel elle est solidarisée en rotation et en translation. La bague 45 comporte un retour 46 venant coiffer une entretoise 47 annulaire cannelée insérée entre le retour 46 de ladite bague 45 et la tranche du premier tronçon 1 de gros diamètre. L'entretoise 47 peut coulisser sur le second tronçon 2 de petit diamètre par rapport auquel elle est bloquée en rotation par l'engagement de ses cannelures internes avec les cannelures externes du second tronçon tubulaire 2, assurant ainsi une bonne étanchéité. La présente invention n'est pas limitée aux modes de réalisa¬ tion qui ont été explicitement décrits, mais elle en inclut les diverses variantes et généralisations contenues dans le domaine des revendica¬ tions ci-après. A further increased locking efficiency can be obtained by using an elastomer locking ring, and by using an actuating member which acts on said ring simultaneously by exerting axial compression against its two end faces, and by exerting a radial thrust towards the outside on the inside face of its axial bore, by corresponding generally conical surfaces. It is thus possible to distribute in a more appropriate and regular manner the radial deformations of the ring, which is applied very effectively on the inner face of the first tubular element. Such an action can for example be carried out in the embodiment of Figure 18. In the embodiment of Figure 11, a sealing ring 26 is fitted around the end of the first tubular section 1 of large diameter. The ring 26 can rotate axially relative to the first tubular section 1, as in the embodiment of Figures 1 and 2. In the embodiment of Figure 12, the seal is provided by a seal ring 45, adapted around the end of the first tubular section 1 of large diameter on which it is secured in rotation and in translation. The ring 45 has a return 46 from covering a splined annular spacer 47 inserted between the return 46 of said ring 45 and the edge of the first section 1 of large diameter. The spacer 47 can slide on the second section 2 of small diameter with respect to which it is locked in rotation by the engagement of its internal splines with the external splines of the second tubular section 2, thus ensuring good sealing. The present invention is not limited to the embodiments which have been explicitly described, but it includes the various variants and generalizations thereof contained in the field of claims below.

Claims

REVENDICATIONS 1 - Ensemble tubulaire télescopique comprenant :CLAIMS 1 - Telescopic tubular assembly comprising:
- au moins un premier tronçon tubulaire (1) de plus grand diamètre et un second tronçon tubulaire (2) de plus petit diamètre, le second tronçon (2) tubulaire ayant une extrémité intérieure (4) logée à l'intérieur du premier tronçon tubulaire (1) et étant monté à rotation libre et à coulissement dans le premier tronçon tubulaire (1) entre une position rétractée et une position déployée,- at least a first tubular section (1) of larger diameter and a second tubular section (2) of smaller diameter, the second tubular section (2) having an inner end (4) housed inside the first tubular section (1) and being mounted with free rotation and sliding in the first tubular section (1) between a retracted position and a deployed position,
- un organe actionneur, comprenant un premier élément actionneur (35) monté à coulissement dans le premier tronçon tubulaire (1) de ; lus grand diamètre et comprenant un second élément actionneur (7) fixe du second tronçon tubulaire (2) de plus petit diamètre, le premier (35) et le second (7) éléments actionneurs coopérant l'un et l'autre par vissage pour déplacer axialement le premier élément actionneur (35) lors d'une rotation relative axiale,- an actuator member, comprising a first actuator element (35) slidably mounted in the first tubular section (1) of ; read large diameter and comprising a second actuator element (7) fixed to the second tubular section (2) of smaller diameter, the first (35) and the second (7) actuator elements cooperating with each other by screwing to move axially the first actuator element (35) during an axial relative rotation,
- un élément expansible de verrouillage (10), monté à coulissement axial dans le premier tronçon tubulaire (1) de plus grand diamètre, solidaire en translation axiale du second tronçon tubulaire (2) de plus petit diamètre, et sollicité par le premier élément actionneur (35) de l'organe actionneur provoquant sélectivement son expansion radiale ou sa rétraction lors de ses mouvements axiaux, des moyens de blocage en rotation (6, 13, 14) pour assurer la solidarisation en rotation du premier élément actionneur (35) dans le premier tronçon tubulaire (1) de plus grand diamètre, caractérisé en ce que :- an expandable locking element (10), mounted for axial sliding in the first tubular section (1) of larger diameter, integral in axial translation with the second tubular section (2) of smaller diameter, and urged by the first actuating element (35) of the actuator member selectively causing its radial expansion or its retraction during its axial movements, rotation locking means (6, 13, 14) for securing in rotation the first actuator element (35) in the first tubular section (1) of larger diameter, characterized in that:
- la surface intérieure (5) du premier tronçon tubulaire (1) de plus grand diamètre comprend au moins trois nervures longitudinales (6, 13, 14) réparties régulièrement selon son pourtour, chaque nervure s'enga¬ geant dans une rainure périphérique longitudinale respective de blocage (15, 16, 17) du premier élément actionneur pour son blocage en rotation,- The inner surface (5) of the first tubular section (1) of larger diameter comprises at least three longitudinal ribs (6, 13, 14) distributed regularly along its periphery, each rib engaging in a respective longitudinal peripheral groove blocking (15, 16, 17) of the first actuator element for blocking it in rotation,
- lesdites nervures (6, 13, 14) occupent toute ou la plus grande partie de la longueur du premier tronçon tubulaire (1),- said ribs (6, 13, 14) occupy all or most of the length of the first tubular section (1),
- les nervures (6, 13, 14) sont conformées pour venir en appui à faible jeu et simultanément contre la surface extérieure du second tronçon tubulaire (2) de plus petit diamètre,the ribs (6, 13, 14) are shaped to come into abutment with little play and simultaneously against the external surface of the second tubular section (2) of smaller diameter,
- lesdites nervures (6, 13, 14) présentent une surface de crête large et arrondie pour épouser une partie significative du pourtour de la surface extérieure du second tronçon tubulaire (2) et constituer entre les tronçons tubulaires (1, 2) une surface d'appui propre à supporter les contraintes mécaniques de flexion subies par l'ensemble tubulaire télescopique. 2 - Ensemble tubulaire télescopique selon la revendication 1, caractérisé en ce que les nervures intérieures du premier tronçon tubulaire (1) sont formées par enfoncement de la paroi dudit tronçon tubulaire, formant simultanément des rainures extérieures longitudinales (18, 19, 20) de plus faible largeur que. les nervures intérieures (6, 13, 14).- Said ribs (6, 13, 14) have a wide and rounded ridge surface to match a significant part of the periphery of the surface outside of the second tubular section (2) and constitute between the tubular sections (1, 2) a bearing surface capable of supporting the mechanical bending stresses undergone by the telescopic tubular assembly. 2 - telescopic tubular assembly according to claim 1, characterized in that the internal ribs of the first tubular section (1) are formed by depression of the wall of said tubular section, simultaneously forming longitudinal outer grooves (18, 19, 20) more narrow width than. the inner ribs (6, 13, 14).
3 - Ensemble tubulaire télescopique selon la revendication 2, caractérisé en ce que le second tronçon tubulaire (2) comprend des nervures intérieures et rainures extérieures similaires, ses rainures extérieures (21, 22, 23) étant plus étroites que les nervures inté- rieures du premier tronçon tubulaire (1), pour éviter leur engagement mutuel.3 - Telescopic tubular assembly according to claim 2, characterized in that the second tubular section (2) comprises internal ribs and similar external grooves, its external grooves (21, 22, 23) being narrower than the internal ribs of the first tubular section (1), to avoid their mutual engagement.
4 - Ensemble tubulaire télescopique selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'il comprend trois tronçons tubulaires successifs (1, 2, 3) se raccordant deux à deux de façon similaire pour être verrouillés ou déverrouillés par rotation axiale.4 - Telescopic tubular assembly according to any one of claims 1 to 3, characterized in that it comprises three successive tubular sections (1, 2, 3) connecting in pairs similarly to be locked or unlocked by axial rotation .
5 - Ensemble tubulaire télescopique selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le premier élément actionneur est constitué par l'élément expansible (10) lui-même, qui est une bague comportant un alésage axial (37) taraudé se vissant sur une partie filetée (9) axiale protubérante du second élément actionneur (7), et qui comporte sur sa surface extérieure lesdites rainures de blocage (15, 16, 17).5 - telescopic tubular assembly according to any one of claims 1 to 4, characterized in that the first actuator element is constituted by the expandable element (10) itself, which is a ring having an axial bore (37) threaded screwing onto a protruding axial threaded part (9) of the second actuator element (7), and which comprises on its outer surface said locking grooves (15, 16, 17).
6 - Ensemble tubulaire télescopique selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le premier élément actionneur est constitué par l'élément expansible (10) lui-même, qui est une vis dont la tête comporte lesdites rainures de blocage (15, 16, 17) et dont la tige (100) filetée se visse dans un alésage taraudé du second élément actionneur (307).6 - telescopic tubular assembly according to any one of claims 1 to 4, characterized in that the first actuator element is constituted by the expandable element (10) itself, which is a screw whose head has said locking grooves (15, 16, 17) and whose threaded rod (100) is screwed into a threaded bore of the second actuator element (307).
7 - Ensemble tubulaire télescopique selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le premier élément actionneur est un écrou (35) distinct de l'élément expansible (10), se vissant sur une partie filetée (9) axiale protubérante du second élément actionneur (7), et comportant sur sa surface extérieure lesdites rainures de blocage (15, 16, 17), l'écrou (35) portant contre une surface d'extrémité de l'élément expansible (10).7 - Telescopic tubular assembly according to any one of claims 1 to 4, characterized in that the first actuating element is a nut (35) distinct from the expandable element (10), screwed onto a threaded part (9) axial protruding from the second element actuator (7), and comprising on its outer surface said locking grooves (15, 16, 17), the nut (35) bearing against an end surface of the expandable element (10).
8 - Ensemble tubulaire télescopique selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le premier élément actionneur est une vis (135) dont la tête (136) comporte sur sa surface extérieure lesdites rainures de blocage (15, 16, 17) et dont la tige filetée (137) se visse dans un alésage taraudé du second élément actionneur (107). 9 - Ensemble tubulaire télescopique selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le premier élément actionneur est un écrou (35) se vissant sur une partie filetée (9) axiale protubérante du second élément actionneur (7), la surface externe de l'écrou (35) coulissant axialement dans un passage axial (36) de l'élément expansible (10) en étant bloquée en rotation par rapport audit élément expansible (10) qui comporte sur sa surface extérieure lesdites rainures de blocage (15, 16, 17), l'écrou (35) portant contre une surface d'extrémité de l'élément expansible (10).8 - Telescopic tubular assembly according to any one of claims 1 to 4, characterized in that the first actuator element is a screw (135) whose head (136) has on its outer surface said locking grooves (15, 16, 17) and whose threaded rod (137) is screwed into a threaded bore of the second actuator element (107). 9 - telescopic tubular assembly according to any one of claims 1 to 4, characterized in that the first actuating element is a nut (35) screwed onto a threaded portion (9) protruding axial of the second actuating element (7), the external surface of the nut (35) sliding axially in an axial passage (36) of the expandable element (10) being locked in rotation relative to said expandable element (10) which comprises on its external surface said blocking grooves ( 15, 16, 17), the nut (35) bearing against an end surface of the expandable element (10).
10 - Ensemble tubulaire télescopique, selon l'une quelconque des revendications 5 à 9, caractérisé en ce que l'élément expansible (10) porte, par une surface intérieure généralement conique (39), contre une surface extérieure généralement conique (8) du second élément actionneur (7), provoquant l'expansion de la zone d'extrémité correspondante de l'élément expansible (10). 11 - Ensemble tubulaire télescopique selon l'une des revendica¬ tions 7 ou 9, caractérisé en ce que :10 - Telescopic tubular assembly, according to any one of claims 5 to 9, characterized in that the expandable element (10) carries, by a generally conical inner surface (39), against a generally conical outer surface (8) of the second actuator element (7), causing the expansion of the corresponding end region of the expandable element (10). 11 - Telescopic tubular assembly according to one of claims 7 or 9, characterized in that:
- l'élément expansible (10) est une bague comportant une partie centrale (37) dont le trou axial est sensiblement cylindrique, et deux parties d'extrémité (38, 139) dont le trou axial est de plus grand diamètre et se raccorde au trou de partie centrale (37) par une première (39) et une seconde (40) portées généralement coniques,- the expandable element (10) is a ring comprising a central part (37) whose axial hole is substantially cylindrical, and two end parts (38, 139) whose axial hole is of larger diameter and is connected to the central part hole (37) by a first (39) and a second (40) generally conical,
- la première portée conique (39) vient en appui sur une portée conique correspondante (8) du second élément actionneur (7),the first conical bearing (39) comes to bear on a corresponding conical bearing (8) of the second actuator element (7),
- la seconde portée conique (40) vient en appui sur une portée conique correspondante (41) du premier élément actionneur (35), les portées coniques (39, 40) sont associées à deux séries de fentes longitudinales (25, 42, 43) autorisant l'expansion radiale de la bague (10). 12 - Ensemble tubulaire télescopique selon la revendication 11, caractérisé en ce que :- the second conical bearing surface (40) comes to bear on a corresponding conical bearing surface (41) of the first actuating element (35), the conical bearing surfaces (39, 40) are associated with two series of longitudinal slots (25, 42, 43) allowing the radial expansion of the ring (10). 12 - Telescopic tubular assembly according to claim 11, characterized in that:
- les fentes (25) de la première série de fentes sont imbriquées par rapport aux fentes (42, 43) de la seconde série de fentes de la bague (10), les portées conique (39, 40) de la bague (10) sont disposées sensiblement au tiers et aux deux tiers de la longueur de la bague.- The slots (25) of the first series of slots are nested relative to the slots (42, 43) of the second series of slots of the ring (10), the conical surfaces (39, 40) of the ring (10) are arranged substantially at one third and two thirds of the length of the ring.
13 - Ensemble tubulaire télescopique selon l'une quelconque des revendications 1 à 12, caractérisé en ce qu'une bague d'étanchéité (26) est adaptée sur l'extrémité de recouvrement (27) du premier tronçon tubulaire (1) auquel elle est solidarisée axialement, la bague d'étan¬ chéité (26) comprenant une partie d'extrémité (30) conformée pour coulisser à faible jeu sur la surface extérieure du second tronçon tubulaire (2). 14 - Ensemble tubulaire télescopique selon l'une quelconque des revendications 1 à 13, caractérisé en ce que l'étanchéité à la jonction entre deux tronçons successifs (1, 2) est assurée par une bague d'étanchéité (45) adaptée autour de l'extrémité du premier tronçon (1) tubulaire de plus gros diamètre sur lequel elle est solidarisée en rotation et en translation, et comportant un retour (46) venant coiffer une entretoise (47) annulaire cannelée insérée entre le retour (46) de ladite bague (45) et la tranche du premier tronçon (1) de plus gros diamètre, l'entretoise (47) pouvant coulisser sur le second tronçon (2) de plus petit diamètre et étant bloquée en rotation par rapport à ce même second tronçon.13 - Telescopic tubular assembly according to any one of claims 1 to 12, characterized in that a sealing ring (26) is adapted on the covering end (27) of the first tubular section (1) to which it is secured axially, the sealing ring (26) comprising an end part (30) shaped to slide with little play on the external surface of the second tubular section (2). 14 - Telescopic tubular assembly according to any one of claims 1 to 13, characterized in that the seal at the junction between two successive sections (1, 2) is ensured by a sealing ring (45) fitted around the end of the first tubular section (1) of larger diameter on which it is secured in rotation and in translation, and comprising a return (46) coming to cap a grooved annular spacer (47) inserted between the return (46) of said ring (45) and the edge of the first section (1) of larger diameter, the spacer (47) being able to slide on the second section (2) of smaller diameter and being locked in rotation relative to this same second section.
15 - Ensemble tubulaire télescopique selon l'une quelconque des revendications 1 à 14, caractérisé en ce qu'une butée (32, 33) limite le déplacement de l'élément expansible (10) vers la position déployée. 15 - Telescopic tubular assembly according to any one of claims 1 to 14, characterized in that a stop (32, 33) limits the movement of the expandable element (10) towards the deployed position.
EP92909620A 1991-05-24 1992-04-14 Telescopic tubular splined assembly Expired - Lifetime EP0586409B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9106359 1991-05-24
FR9106359A FR2676654B1 (en) 1991-05-24 1991-05-24 TELESCOPIC STICK.
PCT/FR1992/000328 WO1992020413A1 (en) 1991-05-24 1992-04-14 Telescopic tubular splined assembly

Publications (2)

Publication Number Publication Date
EP0586409A1 true EP0586409A1 (en) 1994-03-16
EP0586409B1 EP0586409B1 (en) 1995-06-28

Family

ID=9413161

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92909620A Expired - Lifetime EP0586409B1 (en) 1991-05-24 1992-04-14 Telescopic tubular splined assembly

Country Status (7)

Country Link
US (1) US5458427A (en)
EP (1) EP0586409B1 (en)
JP (1) JPH06507466A (en)
AT (1) ATE124279T1 (en)
DE (1) DE69203235T2 (en)
FR (1) FR2676654B1 (en)
WO (1) WO1992020413A1 (en)

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Also Published As

Publication number Publication date
ATE124279T1 (en) 1995-07-15
DE69203235D1 (en) 1995-08-03
US5458427A (en) 1995-10-17
FR2676654B1 (en) 1994-01-28
EP0586409B1 (en) 1995-06-28
WO1992020413A1 (en) 1992-11-26
JPH06507466A (en) 1994-08-25
DE69203235T2 (en) 1996-02-15
FR2676654A1 (en) 1992-11-27

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