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
  • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
  • F16G5/00—V-belts, i.e. belts of tapered cross-section
  • F16G5/16—V-belts, i.e. belts of tapered cross-section consisting of several parts
  • F16G5/18—V-belts, i.e. belts of tapered cross-section consisting of several parts in the form of links

Definitions

• TITLE Transmission chain comprising rocker assemblies co-operating with sheaves
• a transmission chain comprising a transmission chain comprising rocker assemblies each having a first and a second elongate rocker pin of which pins at least one is destined to co-operate with its respective end surfaces in a torque transmitting way with the opposite conical surfaces of a pair of pulley sheaves, said pins crossing openings in links which interconnect the rocker assemblies which have, in the lengthwise direction of the chain, a certain pitch length which is determined by the distance between corresponding contact lines present in each of the two respective rocker assemblies contained in the link, said links being distinguishable in first links with a pitch length of a first value (L1) and second links with a pitch length of a second value (L2) is known in itself.
• the invention aims to provide a solution for this problem.
• This solution consists in that when a series of individual links in the longitudinal direction of the chain is marked by a number from an increasing series with increment 1 (arithmetical series with increment 1) (1 ,2,3,4,...) the links having the pitch length of the second value (L2) are chosen from the collection of links of which the marking number is a prime number from this series possibly completed by the number .
• the second value (L2) is greater than the first value (L1 ).
• JP 2006 002783 proposes to reduce the generation of noise by a transmission chain in which the pitch length of the links can have two distinct values (L1 , L2) by arranging the links with the first pitch length L1 in consecutive groups each of which contains a number of links equal to the value of respective consecutive prime numbers, and each such a group of links having the first pitch length L1 being followed by a single link having the second pitch length L2.
• the invention is elucidated on the hand of the drawing.
• Fig. 1 shows schematically a side view of a transmission chain in which the measures according to the invention are implemented
• fig. 2 shows in side view two links with mutually different pitch length as used therein;
• fig. 3 shows in side view a part of a transmission chain in which the value of the pitch length is indicated as a function of the marking as used according to the invention.
• Fig. 1 shows a side view of a transmission chain, in its whole indicated with reference numeral 2, which is slung around two pulley sheave sets of a continuously variable transmission such as known in itself and which his not shown in further detail.
• the first, schematically indicated pulley sheave set is denoted with reference numeral 4 and the second, also schematically shown pulley sheave set is indicated with reference numeral 6.
• rocker pins is indicated in fig. 1 with reference numerals 8a, 8b, 8c etc. These torque transmitting rocker pins co-operate with their curved side surfaces, indicated with 10a, 10b, 10c with the opposite flat side surfaces 2a, 12b, 12c of strip-shaped second rocker pins 14a, 14b, 14c etc.
• each link 16, 18 respectively has two openings 20, 22 respectively, separated from each other by a central bridge-shaped part 24, this bridge-shaped part 24 can, however, be omitted so that both openings are combined into one single opening.
• the edge boundary of the opening 20 accommodates, non- rotatably, a pin 8 being of the kind which co-operates torque transmitting with the pulley surfaces while the edge boundary of the opening 22 accommodates non- rotatably a strip-shaped rocker pin 14a which is shorter than the rocker pin 8a so that the ends thereof are not in contact with the pulley sheave sets.
• the links are, as said, of two kinds, a first kind with a first pitch length L1 and such a link is indicated with reference numeral 16, possibly provided with the suffix a, b, c etc. and a second kind which is in the drawing denoted with reference numeral 18 (here, too, possibly provided with suffix a, b, c, etc.) and having a second pitch length L2.
• Fig. 2 shows the pith length L1 and L2 respectively and, as shown, this length is determined by the distance between corresponding contact lines which are present in each of the two respective rocker pin assemblies in the link. With other words: in the links 8 with the greatest pitch length, L2, the distance between the rocker pin assemblies accommodated therein is greater than in the links 16 with the smaller pitch length L .
• the invention provides a specific embodiment of this proposal and is characterized in that, when the individual links in the longitudinal direction of the chain are marked with a number from an increasing series with increment 1 (thus an arithmetical series with increment 1) (1 ,2,3,4,...) one chooses the links with a pich having the second value (L2) (in the present case thus the larger value) from the collection of links of which the marking number is a prime number from this
• the proposal according to the invention guarantees a strictly random distribution of the links of which the pitch length has the second, larger, value (L2) in the total collection of links.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Transmissions By Endless Flexible Members (AREA)

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Publications (1)

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Citations (4)

• 2013
  • 2013-08-12 NL NL1040333A patent/NL1040333C2/nl not_active IP Right Cessation
• 2014
  • 2014-08-05 WO PCT/NL2014/000021 patent/WO2015023175A1/en active Application Filing

Patent Citations (5)

Non-Patent Citations (1)

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