[go: up one dir, main page]

EP0353359A2 - Maillon intermédiaire pour une chaîne à scier - Google Patents

Maillon intermédiaire pour une chaîne à scier Download PDF

Info

Publication number
EP0353359A2
EP0353359A2 EP88307221A EP88307221A EP0353359A2 EP 0353359 A2 EP0353359 A2 EP 0353359A2 EP 88307221 A EP88307221 A EP 88307221A EP 88307221 A EP88307221 A EP 88307221A EP 0353359 A2 EP0353359 A2 EP 0353359A2
Authority
EP
European Patent Office
Prior art keywords
centre
link
links
inset
side links
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.)
Ceased
Application number
EP88307221A
Other languages
German (de)
English (en)
Other versions
EP0353359A3 (fr
Inventor
John K. Wold
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.)
Oregon Tool Inc
Original Assignee
Blount Inc
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
Priority to US06/939,418 priority Critical patent/US4773160A/en
Application filed by Blount Inc filed Critical Blount Inc
Priority to EP88307221A priority patent/EP0353359A3/fr
Publication of EP0353359A2 publication Critical patent/EP0353359A2/fr
Publication of EP0353359A3 publication Critical patent/EP0353359A3/fr
Ceased legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B33/00—Sawing tools for saw mills, sawing machines, or sawing devices
    • B27B33/14—Saw chains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B33/00—Sawing tools for saw mills, sawing machines, or sawing devices
    • B27B33/14—Saw chains
    • B27B33/147—Saw chains with incorporated lubricating means

Definitions

  • This invention relates to a centre link for a saw chain.
  • a loop of saw chain is entrained around a guide bar.
  • the saw chain is made up of articulated links comprising a repeating sequence of centre links pivotally connected to mated pairs of side links. Certain of the side links are provided with outwardly extended cutting portions.
  • the guide bar has a groove along its edge that receives guide or drive tangs extending inwardly from the centre links. These guide tangs ensure the travel of the saw chain around the edge of the bar.
  • the side links slide along guide bar edges on either side of the groove, which edges are often referred to as the guide bar rails.
  • the saw chain is driven rapidly around the guide bar by a drive sprocket engaging the tangs. This action generates a pounding of the bottom edges of the saw chain side links against the rails. These bottom edges of the side links develop burrs, that is, the material of the links spreads or splays as a result of the pounding. After some time, interference occurs as a result of these burrs or splayed portions in the areas of overlap with the interconnected drive link. This is particularly troublesome as the chain travels around the guide bar ends where substantial relative pivoting or articulation of the links takes place.
  • the links bend inwardly as the chain is wrapped around the sprocket or nose end of the guide bar from a straight reach portion of the bar. Then the bend is reversed to a lesser degree as the links return to the other straight reach portion of the bar. Inhibiting this bending action can accelerate wearing nd in some instances may increase the tendency for the chain to jump off the bar.
  • the present invention alleviates the binding effect generated by the above-described interference, by the provision of relieved areas in the sides of the centre or drive link. These relieved areas are configured to accommodate the full range of overlap during articulation as between the centre link and the bottom edge of the side links. Thus considerable splaying is permitted before any interference is developed.
  • the pivoting action is considered in the configuration and thus the relieved area encompasses the area of overlap throughout the full range of relative pivoting.
  • the overlapping areas are just below the interconnecting rivets in the position where the saw chain travels along a straight reach for the bar edge. As the chain travels around the bar end, the overlapping area extends up between the rivets, that is into the mid section of the centre link between the rivets.
  • the portion of the centre link to be relieved is preferably defined by a curved line below each rivet, which represents the path of the bottom edge of the side links relative to the centre link during articulation.
  • the link 10 of the invention is illustrated as being pivotally connected by a rivet 12 between two side links 14 and 16.
  • the side link 16 is a cutting side link with an outwardly extended cutting portion 18.
  • the side links 14,16 engage guide bar rails or edges 20 on either side of a groove 22 of a chain saw guide bar 24.
  • the centre link 10 of the present invention is provided on each side with a configured inset area 30, formed for example by the process known as coining.
  • This inset area 30 is bounded at the top by a curved upper edge 32 and below by a straight bottom edge 34.
  • the bottom edge 34 represents the upper edge of a tang portion 33 extending into the groove 22 of the guide bar 24.
  • the thickness of the tang portion 33 projecting into the groove 22 is matched to the groove width to enhance the stability of the chain.
  • the configuration of the upper edge 32 is designed to provide an adequate area 31 of the thicker material around rivet holes 36 for receiving the rivets 12.
  • the edge 32 extends up between the rivet holes 36 to accommodate the relative pivoting of the side links, that is, the pivoting of the splayed portions 28 between the rivet holes, as illustrated in Figs. 5 and 7. This relative pivoting and thus the configuration of the edge 32 is dictated by the curved path that the saw chain takes around the nose of the guide bar 24.
  • the centre drive link 10 for a 0.95 cm. (3/8 inch) pitch chain has a width in the inset area 30 of 0.02 cm. (.008 inch) less than in areas 31.
  • the tang portion 33 is the same width as the portion 31, which as previously explained, is dictated by the bar groove width.
  • the full thickness of the link extends below the rivet holes 36 by a distance, of 0.025 cm. (.010 inch).
  • the inset area 30 is inset from the full thickness providing substantial increased clearance for the increasing width of the splayed portion 28, as appears from Figure 2.
  • FIG. 6 The alternative embodiment of the invention illustrated in Fig. 6 is intended for use in a saw chain which will be less severely stressed than the saw chain incorporating the link 10.
  • full thickness is not required below the rivets, so the upper edge 32a of the inset area 30 is a straight line extending through the centres or mid points of the rivets, as shown.
  • the coining operation is much simpler than is needed for the link 10 and the area 30 and provides access to the rivets for oil.
  • an oil groove 38 can optionally be provided to communicate the interior of the groove 24 to the inset area 30 and thereby to the rivet.
  • the coined area 30 may be extended down through the tan portion to thereby eliminate the defining bottom edge 34, the bar groove 22 being then of a width to accommodate the reduced thickness of the centre link.
  • Such a modification has the benefit of simpler production.
  • the curved areas 30 in Fig. 7 represent the desired coined area, that is, these areas represent the minimum areas as defined by the splayed portions 28 as, they pivot through a typical angular range of articulation, that is, from about 15 degrees above the axis (a line passing through the centre of the rivet holes) to about 26 degrees below the axis.
  • the depth of the area 30 accommodates the splayed area 28 as the distance to the rivet hole shortens through wearing.
  • a web of uncoined area can extend down the centre of the link between the areas 31 and 33. This web of uncoined material may be desirable in adding stability against side play.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
EP88307221A 1986-12-08 1988-08-04 Maillon intermédiaire pour une chaíne à scier Ceased EP0353359A3 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US06/939,418 US4773160A (en) 1986-12-08 1986-12-08 Saw chain having relieved center link
EP88307221A EP0353359A3 (fr) 1988-08-04 1988-08-04 Maillon intermédiaire pour une chaíne à scier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88307221A EP0353359A3 (fr) 1988-08-04 1988-08-04 Maillon intermédiaire pour une chaíne à scier

Publications (2)

Publication Number Publication Date
EP0353359A2 true EP0353359A2 (fr) 1990-02-07
EP0353359A3 EP0353359A3 (fr) 1990-04-25

Family

ID=8200160

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88307221A Ceased EP0353359A3 (fr) 1986-12-08 1988-08-04 Maillon intermédiaire pour une chaíne à scier

Country Status (1)

Country Link
EP (1) EP0353359A3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230061470A1 (en) * 2021-08-27 2023-03-02 Andreas Stihl Ag & Co. Kg Drive link for a sawchain, and an arrangement of a plurality of drive links for a sawchain

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE815254C (de) * 1948-10-23 1951-10-01 Andreas Stihl Zweilaschenkette fuer Kettensaegen
US2873775A (en) * 1956-08-06 1959-02-17 Textron Inc Saw chains
US2924110A (en) * 1956-08-20 1960-02-09 Mcculloch Corp Saw chain
DE1453167A1 (de) * 1963-03-29 1969-02-27 Andreas Stihl Saegekette fuer Motorkettensaege
US3291169A (en) * 1963-06-17 1966-12-13 Partner Ab Saw chains
US3329183A (en) * 1964-07-13 1967-07-04 Outboard Marine Corp Saw chain
GB1091557A (en) * 1966-07-22 1967-11-15 Globe Ind Ltd Saw chain
US4773160A (en) * 1986-12-08 1988-09-27 Omark Industries, Inc. Saw chain having relieved center link

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230061470A1 (en) * 2021-08-27 2023-03-02 Andreas Stihl Ag & Co. Kg Drive link for a sawchain, and an arrangement of a plurality of drive links for a sawchain
US12370715B2 (en) * 2021-08-27 2025-07-29 Andreas Stihl Ag & Co. Kg Drive link for a sawchain, and an arrangement of a plurality of drive links for a sawchain

Also Published As

Publication number Publication date
EP0353359A3 (fr) 1990-04-25

Similar Documents

Publication Publication Date Title
US20080011144A1 (en) Saw chain having multiple drive link configurations
CA1306405C (fr) Maillon a elements de liaison rabattus
EP0054169A1 (fr) Chaîne de sécurité pour scie
RU97113369A (ru) Направляющая цепь для энергетических линий
JPS6148640A (ja) リンクチエーン
US6748840B2 (en) Saw chain having drive link with guard feature
EP3050685B1 (fr) Rivet de raccordement pour chaîne de scie
US7377380B2 (en) Modular conveyor mat
US4773160A (en) Saw chain having relieved center link
US3283789A (en) Saw chain
EP0353359A2 (fr) Maillon intermédiaire pour une chaîne à scier
US4898057A (en) Low vibration center drive cutter chain
US4924577A (en) Chainsaw guidebar
US2963055A (en) Chain for motor chain saws
EP0427370A2 (fr) Denture pour un pignon de chaîne à rotation folle se trouvant au bout libre d'une barre de guidage de scie à chaîne
US4841825A (en) Saw chain with wrap-over depth gauge
US7293491B2 (en) Low vibration saw chain
US5199197A (en) Wear resistant offset sidebar chain
US2873775A (en) Saw chains
EP3746379B1 (fr) Système d'épissage destiné à une bande transporteuse
US3967378A (en) Saw chain guiding arrangement
US4986799A (en) Transmission chain with pivot pins and intermediate pieces with rolling contact action
US4762044A (en) Saw chain tooth
US3748942A (en) Stabilizing center drive link for saw chain
JPS63128902A (ja) 切断チェーン

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

Kind code of ref document: A2

Designated state(s): CH DE FR GB LI SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): CH DE FR GB LI SE

17P Request for examination filed

Effective date: 19900514

17Q First examination report despatched

Effective date: 19910918

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

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19921215