FR2557228A1 - CABLE MECHANICAL CONTROL WITH AUTOMATIC ADJUSTMENT DEVICE AND ELECTRIC ACTUATION SENSOR - Google Patents

Abstract

THE MECHANICAL CABLE CONTROL, INCORPORATING AN AUTOMATIC ADJUSTING DEVICE 10, 8-7, 6, 4 BETWEEN A FIRST TRUNCON 2 OF THE SHELLING DUCT OF CABLE 1 AND A SECOND TRUNK OF THE DUCTING DUCT WITH A 8, 7 TORQUE CONTROL TO CABLE 1 TO MOVE WITH IT WHEN THE CONTROL IS ACTUATED, INCLUDES AN ELECTRICAL LINE MEANS 21, 21 INCORPORATING A PAIR OF COOPERATING ELECTRICAL CONTACTS 20, 20, 16 DOORS RESPECTIVELY BY THE CONTROL UNIT 8, 7 AND AN ELEMENT 4 OF THE SOLIDARITY LOCKING DEVICE OF THE FIRST SECTION 2 OF THE SHIELDING DUCT.

Description

CABLE MECHANICAL CONTROL WITH ADJUSTMENT DEVICE

  AUTOMATIC AND ELECTRIC ACTUATION DETECTOR

  The present invention relates to mechanical controls by

  cable sliding in a flexible sheathing conduit incorporating a

  positive automatic adjustment for backlash, more particularly

  for the friction clutch control of a motor vehicle, of the type comprising a locking device which selectively secures

  by locking in an unlockable manner, when actuating the

  mechanical control, two successive sections of the sheathing duct requested

  in separation from each other and comprising a

  command coupled to the cable to be able to move with it during the action-

mechanical control.

  A mechanical control of this type is described in the document

  EP-A-O 055 649 in the name of the plaintiff, the content of which is assumed to

integrated here for reference.

  Such a mechanical cable control is intended to connect

  an actuating member, typically a pedal, and an action member

  ner, typically the fork of a friction clutch of a vehicle

  tomobile, and offers the advantage of allowing automatic backlash

  tick by means of an adjustment device arranged at an intermediate point.

  re any of the mechanical control, without therefore requiring any particular adaptation at the ends of the cable or of the sheathing duct,

  while maintaining, along the mechanical control, the integrity of the cable

actuation ble.

  The object of the present invention is to propose a mechanical control of this type exploiting the kinematics of the automatic adjustment device to provide an indication of the actuation of the member to be actuated by this mechanical control without substantially modifying the general arrangement of this control. mechanical and keeping the

  robustness and reliability characteristics.

  To do this, according to a characteristic of the invention, the mechanical control comprises an electrical line means incorporating a

  pair of cooperating electrical contacts carried respectively by the

  gane for controlling the automatic adjustment device and a

  this automatic locking device secured to a first of the sections

lesson of the sheathing duct.

  More specifically, according to another characteristic of the invention, the electrical line means comprises at least one section of

  electric line extending in said first section of cheerful conduit

  swim. - 2- With such an arrangement, the relative displacement between the organ

  control, likely to be driven by the cable during its action-

  ment, and the element integral with the first section of cladding conduit, typically a sleeve forming an actuating cam for locking balls carried by a part of the cage of the control member, makes it possible to provide an electrical indication of the actuated state or not actuated organ

  to actuate, without the need to provide contacts or other organ-

  nes of detection at the level of the actuating member or of the member to be actuated. In the case of a mechanical clutch control, the closing, via the cooperating contacts, of the electrical line means during a declutching phase thus makes it possible to provide a signal capable of being exploited

  in an electronic ignition, injection or shift control unit

automatic report management.

  Other features and advantages of the present invention

  will emerge from the following description of embodiments, given to

  Illustrative but not limiting title, made in connection with the accompanying drawings, in which:

  - Fig. 1 is a schematic view in longitudinal section through

  tielle, of a first embodiment of a mechanical cable control according to the invention; and - Figs. 2 and 3 are schematic views of another mode of

  realization of the mechanical control according to the invention showing respective-

  the idle state and the actuated state of the mechanical control.

  In the following description and in the drawings, the elements

  identical or analogous items bear the same reference numbers,

possibly indexed.

  The mechanical control shown in the drawings comprises a length of cable 1 mounted for axial sliding in a sheathing duct

  flexible consisting of two successive disjoint sections 2 and 2 '. The ex-

  end of the first section 2 is fitted into a central cylindrical housing 3 of a sleeve 4 crossed by the cable 1 and having, at its end opposite to the first section 2 of the sheathing duct, a frustoconical peripheral surface 5 forming an actuating cam for wedging balls 6 carried by a cylindrical cage 7 in which the sleeve 4 is slidably received and which forms part of a control member 8 cooperating in a friction connection with the bare portion of cable 1 between the two sections 2 and 2 'of the sheathing duct, as described in the document EP-A-0 055 649 mentioned above. The cage 7 is itself slidingly received in a closed chamber 9 defined in a composite case 10 3 - in a first end from which the end of the second is fitted

  section 2 ′ of the sheathing duct, the first section 2 of the sheathing duct

  swimming extending slidingly sealed by a seal 11 through the other front end of the housing 10. It will easily be understood that a relative movement between the cage 7 and the sleeve 4 achieves a locking by wedging (or an unlocking) between this sleeve 4 and the housing, that is to say between the two disjoint sections 2 and 2 ′ of the conduit

  cladding. A spacer spring 12 is arranged, coaxially around the first

  mier section 2 of the sheathing conduit, between a flange 13 fixed on a

  intermediate zone of this first section 2 of the cladding conduit and the ex-

  adjacent end of the housing 10 (possibly with the interposition of a

rondella 14).

  washer 14>. typically made of insulating plastic material, In accordance with the invention, the cage 7 has, at its end

  opposite the wiper 8, that is to say close to the end of the first section

  lesson 2 of the sheathing duct, an annular front wall on the underside

  rear of which is formed at least one metallic electrical contact capable of cooperating in support forming electrical contact with the face

  adjacent frontal 16 of the sleeve 4 typically made of metal, for example

  full of steel. At the contact 20 is connected one end, emerging from the first

  mier section 2 of the cladding conduit, of an electric line 21 constituted by a advantageously insulated wire extending in the thickness of the first section 2 of the cladding conduit to beyond, in the direction opposite to the sleeve 4, the flange 13 and ending with a terminal 22 for connection to another electrical line 23 connected to on-board equipment

of the motor vehicle.

  Typically, the sheathing duct 2, 2 ′ comprises an internal sliding tube made of plastic material, a metallic winding made of

  spiral 17 and a peripheral covering sheath 18 made of plastic material

  tick. Advantageously, the end of the first section 2 of the sheathing duct, intended to be fitted into the housing 5 of the sleeve 4, is stripped of its peripheral covering sheath 18, which makes it possible, on the one hand, to facilitate the connection between the internal end of the electric line 21 and its associated contact 20, and on the other hand to establish, during the fitting, a suitable electric contact between the turns of

  the sheathing winding 17 and the metal block of the sleeve 4.

  Thus, in the embodiment of FIG. 1, the electric line means opened or closed by the coming into contact of the contact 20

  with the front face / of the sleeve 4 comprises, in addition to the line 21, the winding-

  spiral metal ment 17 of the first section 2 of the sheathing duct, a line section 210 being connected, in a region of this first section 2 of sheathing duct beyond the flange 13, to the spiral winding 17

  for connection to another terminal of the vehicle on-board equipment.

  In the embodiment of Figs. 2 and 3, the electrical line means comprises two sections of separate lines 21, 21 'respectively connected to a corresponding contact 20 and 20' in the cage 7 and provided, at

  their opposite ends, connection lugs 22, 22 ', the latter

  used for connection to a second line 23 'connected to the other terminal of the vehicle on-board equipment. The lines 21 and 21 ′ are advantageously flooded by overmolding during the installation of the plastic sheath of

  peripheral covering 18 around the winding 17.

  The implementation of the metering command detection device

  standard according to the invention appears clearly on the sequence of FIGS. 2 and 3. In the rest configuration, shown in FIGS. 1 and 2, the connection between the two sections of cable duct, that is to say between the housing 10 and the sleeve 4, is unlocked and the two sections 2, 2 ′ of the sheathing duct are stressed in spacing l relative to each other by the spring 12. The sleeve 4 then carries in maintained contact

  by its face 16 against the contacts 20, 20 '. The circuit formed by the li-

  genes 21 and 21 'is closed. When the mechanical control is actuated, for example for a declutching operation, traction is exerted on the cable 1 which runs in the automatic adjustment device in the / 2 direction of the arrow F1 (Fig. 3). By reaction, the first section / of the duct

  sheathing is subjected to a sliding force in the op direction

  posed F2. It follows that the sleeve 4 moves in the cage 7 in ver-

  rusting the connection by jamming between the sleeve 4 and the housing 10, the front face 16 of the sleeve 4 then moving away from the contacts 20, 20 ′ by a distance e by opening the electrical circuit. When the mechanical control is released, the elements recover their configuration of

  Fig. 1 and 2 by catching, if necessary, the game that occurred in the command

of mechanics.

  Although the present invention has been described in relation to particular embodiments, it is not limited thereto but is on the contrary subject to modifications and variants which will appear to those skilled in the art. In particular, in the variant according to FIG. 1, the contact with the sleeve 4 can be made, via the balls 6, with the metal lining inside the housing 10 so that the

  electrical circuit is normally open at rest and closed when actuated

is lying. - 5 -

Claims (9)

  1. Mechanical control by cable (1) sliding in a conduit   flexible sheathing (2, 2 '), incorporating an automatic adjustment device   tick comprising a locking device (6, 7) securing selected   tively by jamming in an unlockable manner, upon actuation of the mechanical control, two successive sections (2, 2 ′) of the sheathing duct urged in spacing from one another, and comprising a control member ( 8) coupled to the cable (1) in order to be able to move with it when the mechanical control is actuated, characterized in   what it includes means of electric line (21-21 ', 17, 210) incorporated   carrying a pair of cooperating electrical contacts (20, 20 '; 16) carried   respectively by the control member (8, 7) and an element (4) of the device   locking device attached to a first (2) section of the duct cladding.   2. Control according to claim 1, characterized in that   the electric line means comprises at least one section of electric line   sheet (21, 21 ', 17) extending in the first section (2) of cladding conduit. 3. Control according to claim 1 or claim 2, comprising a locking device for wedging balls (6) carried by a cage part (7) of the control member (8), characterized in that said element of the locking device consists of a sleeve   metal (4) received in the cage part (7) and comprising, at an ex-   end, a frustoconical peripheral surface (5) forming an actuating cam   wedge balls (6), a first contact of said pair of   contacts being formed by a front face (16) of the sleeve (4) susceptible   ble to cooperate with at least one second contact (20, 20 ') of said pair of contacts attached to an adjacent axial end wall (15) of the cage (7).   4. Control according to one of claims 2 and 3, character-   sée in that it comprises a spacer spring (12) disposed between an intermediate zone (13) of the first section (2) of sheathing conduit, coaxial thereto, and a shoemaking element (10) of the device   integral adjustment of the second section (2 ′) of cladding conduit.   5. Control according to claim 4, characterized in that   the section of power line (21, 21 ', 17) extends in the first section   cladding duct (2) beyond, in the direction opposite to the element   bootmaker ment (10), of the intermediate zone (13) of the first section -6- (2) cladding conduit.   6. Control according to claim 5, characterized in that the section of power line (21, 21 ', 17-210) protrudes out of the   first section (2) of cladding conduit beyond said intermediate zone   diary (13) of the latter and comprises a connection means (22, 22 ')   to an external power line (23, 23 ').   7. Control according to one of claims 3 to 6, characterized   in that it comprises two separate sections of power line (21, 21 ',   17) extending in the first section (2) of cladding conduit.   8. Control according to claim 7, characterized in that the two separate line sections (21, 21 ') are connected respectively to   two second separate contacts (20, 20 ') attached to said cage (7).   9. Control according to claim 7, comprising a sheathing duct provided with a metal spiral winding (17) sheathed (18), characterized in that the end of the first section (2) of duct   sheathing is fitted into a housing (3) of the sleeve (4) with the winding-   metal wire (17) exposed in electrical contact with the wall of the housing (3), this metal winding (17) constituting one of the two sections power line.