EP0138848A1 - Roue a chaine - Google Patents

Roue a chaine

Info

Publication number
EP0138848A1
EP0138848A1 EP19840900898 EP84900898A EP0138848A1 EP 0138848 A1 EP0138848 A1 EP 0138848A1 EP 19840900898 EP19840900898 EP 19840900898 EP 84900898 A EP84900898 A EP 84900898A EP 0138848 A1 EP0138848 A1 EP 0138848A1
Authority
EP
European Patent Office
Prior art keywords
chain
wheel
links
horizontal
pockets
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.)
Withdrawn
Application number
EP19840900898
Other languages
German (de)
English (en)
Inventor
Simon Riber
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.)
PUSNES MARINE AND OFFSHORE SERVICES AS
Original Assignee
PUSNES MARINE AND OFFSHORE SERVICES AS
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 PUSNES MARINE AND OFFSHORE SERVICES AS filed Critical PUSNES MARINE AND OFFSHORE SERVICES AS
Publication of EP0138848A1 publication Critical patent/EP0138848A1/fr
Withdrawn legal-status Critical Current

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
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/30—Chain-wheels
    • F16H55/303—Chain-wheels for round linked chains, i.e. hoisting chains with identical links

Definitions

  • the present invention relates to a chain wheel for heaving/ lowering a chain.
  • the chain wheel has sprockets and pockets for the horizontal chain links and grooves for the vertical links.
  • a chain wheel usually has a circular groove in the middle having a U-shaped cross section at the bottom and parallel side walls extending radially until they meet the pockets for the horizontal chain links or the sprockets between two neighbouring pockets.
  • the vertical links pass the wheel in said circular groove and has no contact with the wheel.
  • OiV.PI will also guide the next horizontal link some distance down ' on its sprocket.
  • the tendency is the opposite.
  • the chain pull attempts to lift the point of attack up over the sprocket, and the consecutive horizontal link will meet its sprocket higher up than normal. The result is that the chain finally overjumps. Overjumping can, however, also occur under heaving if the chain fits poorly in the wheel.
  • the object of the present invention is to provide the chain with such support that it stays in place in the wheel when loaded, and distributing the force transmission from the chain to the wheel over the largest possible area.
  • the wear will be less.
  • those parts of the chain being in contact with the wheel will be better defined and one has greater certainty for the loads being as presupposed.
  • Both the chain and the chain wheel has relatively poor ' production tolerances and it is therefore important to ensure the best possible positioning of the chain in the wheel.
  • Another object is to distribute those loads which are to be transmitted from the chain to the wheel between the vertical and horizontal links, so that the load in the contact points becomes less and the additional stresses in the chain, which occur mainly as bending stresses, are reduced.
  • ⁇ These objects are obtained by making the chain pockets asymmetrical in the longitudinal direction of the chain, as stated in the main claim.
  • the area where the force from the horizontal chain link is transmitted to the sprocket, is substantially unchanged, while the links at the opposite end have only horizontal support.
  • length variations between the chain pocket and link will not influence the positioning of the link in the pocket.
  • the contact point against the sprocket becomes fixed, while the variations at the opposite end will have no influence.
  • the engagement surface of the sprocket against the chain will remain substantially unchanged, but since the location of the horizontal link in the wheel is well determined, the engagement surface of the sprocket against the chain can be made to better fit the form of the chain, wherefore the specific surface pressure between the horizontal link and the wheel will be reduced.
  • the pockets are given a small angle down towards the axis of the wheel, seen in the direction of the force in the chain.
  • the adjacent vertical links may also be supported at the end facing the chain force.
  • Figure 1 shows a radial section through a chain wheel according to the prior art.
  • Figure 2 shows a section along the line A - A in Figure 1.
  • Figure 3 shows a radial section through a chain wheel according to the invention.
  • Figure 4 shows a radial section through a modification of___.
  • Figure 1 shows a common chain wheel 1, having sprockets 6, pockets 10 and a groove 7, with the chain 2, 3 in a part of the wheel.
  • the conditions for the chain in the wheel are good, the horizontal chain link 2 having engagement 4 against the chain wheel 1 as close as possible to the point 5 where the chain pull is transmitted along to the nearest vertical link 3.
  • the links 2, 3 have no other contact points.
  • the chain force is drawn from the contact point 5' between two chain links, and for the horizontal link 2' the contact point 4* is shown where the force by further rotation is to be transmitted to the wheel. The force will thus have an arm a, and a moment occurs attempting to lift the horizontal link 2' at the opposite end.
  • Figure 2 shows a section in the middle between two sprockets 6 in the chain wheel 1 in an area where the two horizontal links 2 and the vertical links 3 lie in the wheel.
  • Figure 3 shows a chain wheel according to the invention.
  • the horizontal links 2 have a contact surface 4 approximately as in a common chain wheel at the pulling end, while the opposite end has a vertical support 8 in an extension of the pocket 10.
  • the force K giving a moment tending to lift the link 2" is correspondingly shown as in Figure 1.
  • the invention reduces this movement to a minimum concurrently with increasing the contact surface transmitting the chain force to the wheel.
  • the wear on wheel and chain is reduced. - Since positioning of the chain in the wheel is improved, the risk of the chain overjumping sprockets is also reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)
  • External Artificial Organs (AREA)

Abstract

Dans une roue à chaîne (1) ayant des dents de pignon (6) et des poches (10) pour les maillons horizontaux (2) de la chaîne et des rainures (7) pour les maillons verticaux (3), les poches sont allongées de manière à former un support (8) uniquement perpendiculairement au plan des maillons horizontaux (2) à l'extrémité opposée de la direction de traction de la chaîne, les poches ayant une forme conventionnelle dans le sens de la traction. Les poches (10) peuvent avoir une telle forme que le point tangentiel (11) avec un cercle inscrit se trouve entre le point médian (12) des maillons et le point de contact (4). Les maillons verticaux (3) de la chaîne peuvent être supportés dans le sens de la traction de la chaîne dans la région (9) où les poches (10) fusionnent avec la rainure (7).
EP19840900898 1983-02-23 1984-02-22 Roue a chaine Withdrawn EP0138848A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO830640A NO156974C (no) 1983-02-23 1983-02-23 Kjettingskive.
NO830640 1983-02-23

Publications (1)

Publication Number Publication Date
EP0138848A1 true EP0138848A1 (fr) 1985-05-02

Family

ID=19886968

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840900898 Withdrawn EP0138848A1 (fr) 1983-02-23 1984-02-22 Roue a chaine

Country Status (3)

Country Link
EP (1) EP0138848A1 (fr)
NO (1) NO156974C (fr)
WO (1) WO1984003341A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ549053A (en) 2006-08-08 2009-02-28 Vetus N V Rope sheave with faces having opposed ridges
NZ549054A (en) 2006-08-08 2009-06-26 Vetus N V Chain wheel with a number of chain link pockets

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US839325A (en) * 1904-11-12 1906-12-25 Edwin Harrington Son And Company Inc Hoisting mechanism.
GB1198473A (en) * 1967-03-10 1970-07-15 Coal Industry Patents Ltd Improvements in or relating to Drive Chain Sprockets
PL105657B1 (pl) * 1975-06-04 1979-10-31 Kolo lancuchowe zwlaszcza dla maszyn gorniczych

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8403341A1 *

Also Published As

Publication number Publication date
NO156974C (no) 1987-12-30
NO830640L (no) 1984-08-24
WO1984003341A1 (fr) 1984-08-30
NO156974B (no) 1987-09-21

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE GB SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19850124

RIN1 Information on inventor provided before grant (corrected)

Inventor name: RIBER, SIMON