WO2009070101A1 - Ressort annulaire - Google Patents

Ressort annulaire Download PDF

Info

Publication number
WO2009070101A1
WO2009070101A1 PCT/SE2008/051343 SE2008051343W WO2009070101A1 WO 2009070101 A1 WO2009070101 A1 WO 2009070101A1 SE 2008051343 W SE2008051343 W SE 2008051343W WO 2009070101 A1 WO2009070101 A1 WO 2009070101A1
Authority
WO
WIPO (PCT)
Prior art keywords
spring
radius
annular spring
curvature
circumference
Prior art date
Application number
PCT/SE2008/051343
Other languages
English (en)
Inventor
Daniel Jerneborg
Olle Lundvall
Dag Nilsson
Original Assignee
Scania Cv Ab (Publ)
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 Scania Cv Ab (Publ) filed Critical Scania Cv Ab (Publ)
Publication of WO2009070101A1 publication Critical patent/WO2009070101A1/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
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/02—Arrangements for synchronisation, also for power-operated clutches
    • F16D23/04—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch
    • F16D23/06—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
    • F16B21/10—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts
    • F16B21/16—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft
    • F16B21/18—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft with circlips or like resilient retaining devices, i.e. resilient in the plane of the ring or the like; Details
    • F16B21/183—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft with circlips or like resilient retaining devices, i.e. resilient in the plane of the ring or the like; Details internal, i.e. with spreading action
    • 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
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/02—Arrangements for synchronisation, also for power-operated clutches
    • F16D23/04—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch
    • F16D23/06—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation
    • F16D23/0612—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation the blocking mechanism comprising a radial pin in an axial slot with at least one branch

Definitions

  • the invention relates to an annular spring with open ends intended to be clamped in a circular recess.
  • the perception on which the invention is based is that when a spring with open ends which is round or oval in a free state is clamped in a circular smaller recess, it will not curve uniformly along its circumference. Above all, it will be subject to less bending stress in the vicinity of its ends than in a region at its diametrically opposite side, resulting in uneven abutment round the recess.
  • Studies of conventional springs used have shown that the spring's wear and hence its abutment force against the recess may be greatest at the ends and at points a short distance away in both directions from the diagonally opposite side.
  • the radius of curvature decreases step by step along the circumference.
  • the unstressed spring can therefore be divided into a number of angle intervals with constant radii decreasing step by step.
  • the radius of curvature may also decrease continuously along the circumference. This latter spring configuration is also relatively easy to achieve, e.g. with a numerically controlled spring bending machine.
  • An annular spring according to the invention may in particular be used in a driver in a synchronised gearchange mechanism.
  • the spring's more uniform abutment against the recess may then prevent its being deformed plastically and ensure that it always reliably returns to the recess.
  • FIG. 2 is a simplified partial sectional view approximately along the line 2-2 in FIG. 1 , showing an upper portion of the driver and the annular springs in part of a synchronised gearchange mechanism;
  • FIG. 3 depicts a side view of an annular spring according to the invention in a free state
  • FIG. 4 depicts a side view of an annular spring according to the invention in a free state and a clamped state.
  • the driver 30 with annular spring 10 depicted in FIG. 1 is intended to be fitted in a synchronised gearchange mechanism 20 for a gear step in an otherwise undepicted gearbox approximately in the manner illustrated in a somewhat simplified form in FIG. 2.
  • an annular spring according to the invention may also be used for other purposes, e.g. as a lock spring prestressed against a groove open radially inwards or outwards (not depicted).
  • the gearchange mechanism 20 further comprises a coupling sleeve 50, a pair of outer cones 60, a pair of inner cones 80 and a coupling sleeve 70.
  • the gearchange mechanism 20 may be varied in various ways here not described in more detail which are of no significance for the invention.
  • the cones may be omitted on one side of the driver 30, and the cones may also be duplicated in the radial direction.
  • the coupling sleeve 50 In a notional neutral state, the coupling sleeve 50 is regarded as assuming a central position represented by the chain-dotted contour on the right in FIG. 2.
  • the coupling sleeve 50 In a notional neutral state, the coupling sleeve 50 is regarded as assuming a central position represented by the chain-dotted contour on the right in FIG. 2.
  • the coupling sleeve 70 is itself connected to, for joint rotation with, the inner cone 80.
  • the driver 30 is thus completely disengaged rotationally from the coupling sleeve 70.
  • the gearchange operation is completed by the ridges 52 and grooves of the coupling sleeve 50 engaging with the ridges 72 and grooves of the coupling sleeve 70 when the coupling sleeve 50 reaches the chain-dotted extreme left position in FIG. 2.
  • the annular spring 10 frees itself by its inherent spring force from the narrowing recess and returns to its stressed state in a seat or circular recess 46 of the driver 30.
  • the left outer cone 60 is then allowed to move back to the right and free itself from the frictional engagement with the inner cone 80, so that the driver 30 and the coupling sleeve 70 revert to being totally disengaged rotationally from one another.
  • the recess 46 is situated at the radial inside of axially protruding ridges 42 of the spined connection 40 of the driver 30.
  • the recess 46 has an extension in the axial direction with an undercut on the inside of the protruding ridges 42, i.e. the extension slopes somewhat radially inwards, typically by about 7°.
  • the radius of curvature is shown decreasing step by step along the circumference from an initial radius R and is constant within each step or angle interval A, B, C, D on either side of a symmetry line of the spring 10.
  • the radius of curvature r( ⁇ ) decreases continuously from an initial radius R, i.e. according to a calculated relationship R - ⁇ -,a 2 - ⁇ 2 a 4 in which ⁇ -i, ⁇ 2 are suitable constants from a chosen computer model.
  • FIG. 4 also shows the spring 10 in its loaded, here stressed radially inwards, operating state.
  • An annular spring according to FIG. 3 may be manufactured in a number of stages by a conventional wire bending machine (not depicted) with suitable pressure rolls which are fixed during operation.
  • a numerically controlled wire bending machine (not depicted) with pressure rolls which are continuously settable during operation may be used.

Abstract

L'invention porte sur un ressort annulaire (10) présentant des extrémités ouvertes prévues pour être serrées dans une cavité circulaire. Selon l'invention, le ressort (10), dans son état libéré, présente, le long de sa circonférence, un rayon de courbure (r) qui diminue vers les extrémités dans le but, dans un état serré (B), de distribuer de manière uniforme une force de serrage autour de la cavité circulaire (46).
PCT/SE2008/051343 2007-11-26 2008-11-25 Ressort annulaire WO2009070101A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0702591-9 2007-11-26
SE0702591 2007-11-26

Publications (1)

Publication Number Publication Date
WO2009070101A1 true WO2009070101A1 (fr) 2009-06-04

Family

ID=40678829

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2008/051343 WO2009070101A1 (fr) 2007-11-26 2008-11-25 Ressort annulaire

Country Status (1)

Country Link
WO (1) WO2009070101A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114857213A (zh) * 2022-04-11 2022-08-05 中国航发沈阳发动机研究所 一种航空发动机整体叶盘阻尼环及具有其的减振结构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0195519A1 (fr) * 1985-02-26 1986-09-24 Toyota Jidosha Kabushiki Kaisha Mécanisme de syndro d'engrenage dans une transmission de couple
FR2888876A1 (fr) * 2005-07-21 2007-01-26 Snecma Dispositif d'amortissement des vibrations d'un rotor dans une turbomachine
DE102005048198A1 (de) * 2005-10-07 2007-04-19 Albrecht Knecht Sprengring

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0195519A1 (fr) * 1985-02-26 1986-09-24 Toyota Jidosha Kabushiki Kaisha Mécanisme de syndro d'engrenage dans une transmission de couple
FR2888876A1 (fr) * 2005-07-21 2007-01-26 Snecma Dispositif d'amortissement des vibrations d'un rotor dans une turbomachine
DE102005048198A1 (de) * 2005-10-07 2007-04-19 Albrecht Knecht Sprengring

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114857213A (zh) * 2022-04-11 2022-08-05 中国航发沈阳发动机研究所 一种航空发动机整体叶盘阻尼环及具有其的减振结构
CN114857213B (zh) * 2022-04-11 2024-04-09 中国航发沈阳发动机研究所 一种航空发动机整体叶盘阻尼环及具有其的减振结构

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