WO2014064721A1 - Joint d'accouplement ayant une récupération de jeu automatique - Google Patents

Joint d'accouplement ayant une récupération de jeu automatique Download PDF

Info

Publication number
WO2014064721A1
WO2014064721A1 PCT/IT2012/000329 IT2012000329W WO2014064721A1 WO 2014064721 A1 WO2014064721 A1 WO 2014064721A1 IT 2012000329 W IT2012000329 W IT 2012000329W WO 2014064721 A1 WO2014064721 A1 WO 2014064721A1
Authority
WO
WIPO (PCT)
Prior art keywords
hub
shaft
seat
clearance
elements
Prior art date
Application number
PCT/IT2012/000329
Other languages
English (en)
Inventor
Flavio Tondolo
Original Assignee
Sti Srl
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 Sti Srl filed Critical Sti Srl
Priority to PCT/IT2012/000329 priority Critical patent/WO2014064721A1/fr
Publication of WO2014064721A1 publication Critical patent/WO2014064721A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
    • F16D1/0876—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with axial keys and no other radial clamping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
    • F16D1/0894—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with other than axial keys, e.g. diametral pins, cotter pins and no other radial clamping

Definitions

  • the present invention relates to a new shaft-hub coupling joint with automatic clearance recovery.
  • the invention is aimed at transmitting a torque between shaft and hub, regardless of its direction and the intensity variations, without respective movements due to the clearance between the same components .
  • the field of the invention is the one pertaining to the shaft- hub coupling means, for example used for rotary actuator valves.
  • This kind of means are devices able to transmit the rotating movement of a rotating shaft to the hub which is splined thereto.
  • the mounting tolerances between shaft-tongue-hub allows the complete removal of clearances only increasing remarkably the production and assembly costs, and this is a remarkable disadvantage, in particular for quarter turn actuator valves where the actuator position has to be controlled and known exactly.
  • the working tolerances of shafts, hubs and keys are to be extremely considered.
  • connection of the servomotor with the valve has a shaft provided with a tongue, which has to transmit a very high torque.
  • This kind of joint for its own working and assembling features, has clearances when coupled.
  • An embodiment' of the present invention is provided with a clearance recovery means comprising a plurality of prismatic elements to be inserted inside a spline in the hub.
  • a clearance recovery means comprising a plurality of prismatic elements to be inserted inside a spline in the hub.
  • the clearance automatic recovery means is in fact accommodated inside this seat.
  • Said clearance recovery means for its configuration, is insensitive to the combination of "tolerances" of the seats.
  • said system can be applied on shafts provided with standard splines for transmission keys.
  • Figure 1 is a 3D view of the assembled joint
  • Figure 2 is an exploded view of the joint according to the invention.
  • Figure 3 is a section of the joint showing the scheme of the forces acting on the joint
  • Figure 4 is an exploded view of the joint, according to the invention, representing the prismatic elements constituting the clearance automatic recovery means and the forces mutually exchanged by the same;
  • Figure 5 is an example of the dimensioning of the clearance automatic recovery means and of the hub seat ;
  • Figure 6 is a scheme relating to the angular dimensioning of the prismatic elements.
  • the coupling joint comprises a shaft 1 provided with a standard seat 10 for standardized coupling means as for example keys or tongues, a hub 4 provided with at least a spline 2 and a clearance recovery means 11, in turn comprising a plurality of prismatic elements 6, 7, 8.
  • the prismatic elements 6, 7, 8 of the clearance recovery means 11 are assembled in sequence in the spline 2 and are pre-loaded by an integral cover 3, for example by means of a coupling screwed to the hub 4.
  • the shaft transmits a force by means of the vertical wall 13 of its seat 10 to the prismatic element 7.
  • the element 6 transmits the force to the hub 4 by means of the vertical wall 9 of its spline 2.
  • the two prismatic elements 6 are set on 7.
  • the two outer vertical walls 14 of the two prismatic elements 6 lean on the vertical walls 9 of the spline of the hub 2.
  • all the elements thus positioned are closed by the cover 3 which, in the inner portion, is provided with a grove 5.
  • the cover 3 which, in the inner portion, is provided with a grove 5.
  • the sum of the bases of 6, 7, and 8 is greater the maximum width of the groove 5 (b>bl, see figure 5), so the upper end of the element 7 does not rest on the groove 5.
  • the two elements 6 slide on the elements 7 and contact the vertical walls 9, thus centering themselves.
  • the cover closing guarantees that the elements 6, which cannot expand themselves, go down and cause the elements 7 to slide on 8.
  • the two vertical walls 13 of the elements 7 expand and so press on the vertical walls 15 of the seat of the shaft 10 and the whole will be blocked.
  • the element 8 can be shifted to the side but the two elements 7 bring it in balance position again.
  • the elements 7 and the element 8 are moved first to the balance position inside the seat 10. Then, the elements 6 are moved on the 7 to remove the clearance on the hub.
  • the inventive clearance automatic recovery means achieves its aim thanks to an extremely exactly calculated force distribution.
  • the clearance recovery means 11 remains in balance and does not move. If such balance is inverted, it is provided a thrust going out from the seat of the clearance recovery means. Assuming that the coefficient of sliding friction is 0,2 for steel on steel, in such a case it is possible to vary the angle up to over 11° before a balance inversion occurs. So, maintaining the characteristic * angle of the generic prismatic element equal to 10° (figure 6b), said prismatic elements 6, 7, 8 do not tend to go out from their own seat, which is a movement also prevented by the outer cover 3.

Abstract

La présente invention se rapporte à un joint d'accouplement pour permettre une transmission de couple entre un arbre et un moyeu, ledit joint d'accouplement comprenant un arbre (1) comportant une embase standard (10) pour des moyens d'accouplement standardisés, ainsi qu'un moyeu (4) qui comprend au moins une clavette (2), ledit joint d'accouplement étant caractérisé en ce que ladite embase standard (10) de l'arbre d'entraînement (1) reçoit un moyen de récupération de jeu (11) qui comprend, à son tour, un ou plusieurs éléments prismatiques (6, 7, 8) présentant un angle caractéristique a et qui, en étant positionnés de manière appropriée, suppriment le jeu entre l'arbre, le moyeu de récupération de jeu et le moyeu.
PCT/IT2012/000329 2012-10-24 2012-10-24 Joint d'accouplement ayant une récupération de jeu automatique WO2014064721A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IT2012/000329 WO2014064721A1 (fr) 2012-10-24 2012-10-24 Joint d'accouplement ayant une récupération de jeu automatique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2012/000329 WO2014064721A1 (fr) 2012-10-24 2012-10-24 Joint d'accouplement ayant une récupération de jeu automatique

Publications (1)

Publication Number Publication Date
WO2014064721A1 true WO2014064721A1 (fr) 2014-05-01

Family

ID=47605705

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2012/000329 WO2014064721A1 (fr) 2012-10-24 2012-10-24 Joint d'accouplement ayant une récupération de jeu automatique

Country Status (1)

Country Link
WO (1) WO2014064721A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US284704A (en) * 1883-09-11 Gustavus h
FR1339826A (fr) * 1962-11-15 1963-10-11 Siemens Ag Assemblage par rainure et clavette d'éléments de machines
US3480223A (en) * 1967-09-12 1969-11-25 Talcott Inc James Split key for spider arm
DE19742142A1 (de) * 1996-09-24 1998-03-26 Gkn Automotive Ag Einrichtung zur mechanischen Festlegung einer Muffe auf einer Antriebswelle in abnehmbarer Weise
DE29705524U1 (de) * 1997-03-27 1998-07-23 Muellenberg Ralph Anordnung zur Verbindung einer Hohlwelle mit einem zylindrischen Bauteil
WO2001053714A1 (fr) * 2000-01-24 2001-07-26 Bartlem Pty Ltd Accouplement a entrainement direct
FR2804182A1 (fr) * 2000-01-25 2001-07-27 Jeumont Ind Clavette de liaison de deux pieces

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US284704A (en) * 1883-09-11 Gustavus h
FR1339826A (fr) * 1962-11-15 1963-10-11 Siemens Ag Assemblage par rainure et clavette d'éléments de machines
US3480223A (en) * 1967-09-12 1969-11-25 Talcott Inc James Split key for spider arm
DE19742142A1 (de) * 1996-09-24 1998-03-26 Gkn Automotive Ag Einrichtung zur mechanischen Festlegung einer Muffe auf einer Antriebswelle in abnehmbarer Weise
DE29705524U1 (de) * 1997-03-27 1998-07-23 Muellenberg Ralph Anordnung zur Verbindung einer Hohlwelle mit einem zylindrischen Bauteil
WO2001053714A1 (fr) * 2000-01-24 2001-07-26 Bartlem Pty Ltd Accouplement a entrainement direct
FR2804182A1 (fr) * 2000-01-25 2001-07-27 Jeumont Ind Clavette de liaison de deux pieces

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