1、BSI Standards PublicationBS ISO 1081:2013Belt drives V-beltsand V-ribbed belts, andcorresponding grooved pulleys VocabularyBS ISO 1081:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 1081:2013.The UK participation in its preparation was entrusted to Techni
2、calCommittee MCE/10, Belts 21.220.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 December 2013.Amendments issued since publicationDate Text affectedBS ISO 10
3、81:2013 ISO 2013Belt drives V-belts and V-ribbed belts, and corresponding grooved pulleys VocabularyTransmissions par courroies Courroies trapzodales et stries, et poulies gorges VocabulaireINTERNATIONAL STANDARDISO1081Third editionTroisime dition2013-12-01Reference numberNumro de rfrenceISO 1081:20
4、13(E/F)NORME INTERNATIONALEBS ISO 1081:2013ISO 1081:2013(E/F)ii ISO 2013 All rights reserved/Tous droits rservsCOPYRIGHT PROTECTED DOCUMENTDOCUMENT PROTG PAR COPYRIGHT ISO 2013The reproduction of the terms and definitions contained in this International Standard is permitted in teaching manuals, in-
5、struction booklets, technical publications and journals for strictly educational or implementation purposes. The conditions for such reproduction are: that no modifications are made to the terms and definitions; that such reproduction is not permitted for dictionaries or similar publications offered
6、 for sale; and that this International Standard is referenced as the source document.With the sole exceptions noted above, no other part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the intern
7、et or an intranet, without prior writ-ten permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.La reproduction des termes et des dfinitions contenus dans la prsente Norme internationale est autorise dans les manuels denseign
8、ement, les modes demploi, les publications et revues techniques destins exclusivement lenseignement ou la mise en application. Les conditions dune telle reproduction sont les suivantes: aucune modification nest apporte aux termes et dfinitions; la reproduction nest pas autorise dans des dictionnaire
9、s ou publications similaires destins la vente; la prsente Norme internationale est cite comme document source. la seule exception mentionne ci-dessus, aucune partie de cette publication ne peut tre reproduite ni utilise sous quelque forme que ce soit et par aucun procd, lectronique ou mcanique, y co
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11、x + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in Switzerland/Publi en SuisseBS ISO 1081:2013ISO 1081:2013(E/F)Contents PageForeword iv0 Scope .11 Terms and definitions relating to V-belts and grooved pulleys .11.1 General terms and definitions . 11.2 Terms and definitions relati
12、ng to the system based on data widths 51.3 Terms and definitions relating to the system based on effective width 72 Terms and definitions related to V-belts and ribbed pulleys .92.1 General terms and definitions .93 Terms and definitions relating to tension .144 Terms and definitions relating to mod
13、ulus .14 ISO 2013 All rights reserved/Tous droits rservs iiiBS ISO 1081:2013ISO 1081:2013(E/F)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried
14、 out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO
15、 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different a
16、pproval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directivesAttention is drawn to the possibility that some of the elements of this document may be the subj
17、ect of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received. www.iso.org/patentsAny trade name
18、used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical
19、Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 41, Pulleys and belts (including veebelts), SC 1, Veebelts and grooved pulleys.This third edition cancels and replaces the second edition (ISO 1081:1995), which ha
20、s been technically revised.iv ISO 2013 All rights reserved/Tous droits rservsBS ISO 1081:2013INTERNATIONAL STANDARD ISO 1081:2013(E/F)Belt drives V-belts and V-ribbed belts, and corresponding grooved pulleys Vocabulary0 ScopeThis International Standard specifies the terms and definitions, in English
21、 and French, relating to aromatic natural raw materials.This International Standard defines terms relating to V-belt drives, V-belts, hexagonal belts, joined V-belts and the corresponding V-grooved pulleys, V-ribbed belt drives, V-ribbed belts and V-ribbed pulleys, as well as the corresponding symbo
22、ls.The general definitions are valid irrespective of the system describing the pulleys.The dimensions of pulley grooves can be defined either on the basis of the datum width or on the basis of the effective width. As a result, two systems for the definition and description of the dimensions of pulle
23、ys and belts have been developed. The two systems are independent of each other.1 Terms and definitions relating to V-belts and grooved pulleys1.1 General terms and definitions1.1.1 Belts1.1.1.1V-beltbelt, the cross-section of which is shaped roughly like a regular trapeziumNote 1 to entry: On a cro
24、ss-section of a straight-sided belt, the trapezium is outlined by the base, sides and top of the belt.Note 2 to entry: The intersection of the extended profiles of the base, side and top is considered when edges are cut short or rounded.Note 3 to entry: See Figure 1.1.1.1.1.1hexagonal beltspecial be
25、lt with hexagonal cross-section consisting of two equal isosceles trapezia joined at their wider base1.1.1.1.2joined V-belttwo or more equal trapezoidal V-belts placed side by side in a definite distance and joined by a covering band ISO 2013 All rights reserved/Tous droits rservs 1BS ISO 1081:2013I
26、SO 1081:2013(E/F)Figure 1 V-belts1.1.1.2pitch lineany circumferential line in the belt which keeps the same length when the belt is bent perpendicularly to its baseNote 1 to entry: See Figure 2.Key1 pitch lineFigure 2 Pitch line1.1.1.3pitch zonegeometrical zone containing all of the pitch linesNote
27、1 to entry: See Figure 3.2 ISO 2013 All rights reserved/Tous droits rservsBS ISO 1081:2013ISO 1081:2013(E/F)Key1 pitch zoneFigure 3 Pitch zone1.1.1.4pitch widthwpwidth of the belt at its pitch zone (neutral zone)Note 1 to entry: The width remains unchanged when the belt is bent perpendicularly to it
28、s base.Note 2 to entry: See Figure 4.1.1.1.5top widthwlarger width of the trapezium outlined on a cross-sectionNote 1 to entry: See Figure 4.1.1.1.6heightTheight of the trapezium outlined on a cross-sectionNote 1 to entry: See Figure 4.1.1.1.7relative heightnon-dimensional characteristic calculated
29、as the ratio of height to pitch width (Twp)Note 1 to entry: The approximate relative height of the four types of V-belt is as follows: narrow V-belt: 0,9; classical V-belt: 0,7; half wide V-belt: 0,5; wide V-belt: 0,3. ISO 2013 All rights reserved/Tous droits rservs 3BS ISO 1081:2013ISO 1081:2013(E/
30、F)Figure 4 Pitch width, top width, height1.1.2 Pulleys1.1.2.1V-grooved pulleypulley with one or more grooves obtained by rotation of a profile in the shape of a truncated or non-truncated symmetrical V around the pulley axisNote 1 to entry: A round groove bottom is acceptable. In most cases, all the
31、 grooves of a pulley have identical profiles.1.1.2.2angle of pulley grooveangle included by the sides of the groove cross-sectionNote 1 to entry: For any given profile, the pulley groove angle may have several different values depending upon the pulley diameter.Note 2 to entry: See Figure 5.Figure 5
32、 Angle of pulley groove1.1.2.3pitch width of pulley groovewpwidth of the pulley groove which has the same dimension as the pitch width of the belt used with this pulley4 ISO 2013 All rights reserved/Tous droits rservsBS ISO 1081:2013ISO 1081:2013(E/F)1.1.2.4pitch diameterdpdiameter of the pulley at
33、the pitch width of pulley groove1.1.2.5pitch circumferenceCpcircumference of a circle with a diameter equal to the pitch diameter1.1.3 Drives1.1.3.1V-belt drivedrive which consists of one or more V-belts mounted on grooved pulleysNote 1 to entry: The profiles of the belts and of the pulley grooves a
34、re such that the belts come into contact only with the sides of the pulley grooves and not with the bottom of the grooves.1.1.3.2speed ratioRratio of the angular velocities of the pulleys, as calculated from the ratio of the pitch diameters of the pulleys, making no allowance for slip and creep1.2 T
35、erms and definitions relating to the system based on data widths1.2.1 Pulleys1.2.1.1datum widthwdgroove width characterizing the groove profileNote 1 to entry: It is a defined value not subject to tolerance and is usually located at the level of the pitch zone of the V-belt for which the pulley groo
36、ve is preferably intended. It should coincide with the pitch width of that V-belt within reasonable tolerances.Note 2 to entry: The datum width of a pulley groove was previously designated as pitch width (lp). However, the datum width is equal to the pitch width only when the pitch zone on the V-bel
37、t is located at the level of the datum width of the pulley groove.Note 3 to entry: If different angles of pulley groove (1.1.2.2) are required, the groove flanks shall be assumed to hinge round both ends of the datum width.Note 4 to entry: See Figure 6. ISO 2013 All rights reserved/Tous droits rserv
38、s 5BS ISO 1081:2013ISO 1081:2013(E/F)Figure 6 Datum width1.2.1.2datum diameterdddiameter of the pulley at the datum width of the pulley grooveNote 1 to entry: See Figure 7.Figure 7 Datum diameter1.2.1.3datum circumferenceCdcircumference of a circle with a diameter equal to the datum diameter6 ISO 20
39、13 All rights reserved/Tous droits rservsBS ISO 1081:2013ISO 1081:2013(E/F)1.2.1.4datum line differentialbdradial displacement between the levels of the pitch width and the datum widthNote 1 to entry: The datum line differential is a correction term used for calculating the speed ratio when the datu
40、m line is given.Note 2 to entry: The datum line differential is zero if the pitch zone of the V-belt and the level of the datum width of the pulley are coincident.Note 3 to entry: See Figure 8.Figure 8 Datum line differential1.2.2 Belts1.2.2.1datum lengthLdlength of a line circumscribing a V-belt at
41、 the level of the datum diameter of the measuring pulleys whilst the V-belt is at a specified tensionNote 1 to entry: The datum length was previously designated as pitch length, Lp.Note 2 to entry: The recommended method for measuring the datum length of a V-belt includes the use of a measuring fixt
42、ure having two pulleys of the same datum diameter. The datum length is obtained by adding the datum circumference of one pulley to twice the measured distance between the pulley centres.1.3 Terms and definitions relating to the system based on effective width1.3.1 Pulleys1.3.1.1effective widthwegroo
43、ve width characterizing the groove profileNote 1 to entry: It is a defined value not subject to tolerance and is usually located at the outermost extremities of the straight side walls of the groove.Note 2 to entry: For all belt-measuring pulleys and for most machined-type pulleys, it coincides with
44、 the actual top width of the groove within reasonable tolerances. ISO 2013 All rights reserved/Tous droits rservs 7BS ISO 1081:2013ISO 1081:2013(E/F)Note 3 to entry: If different angles of pulley groove (1.1.2.2) are required, the groove flanks shall be assumed to hinge round both ends of the effect
45、ive width.Note 4 to entry: See Figure 9.Figure 9 Effective width1.3.1.2effective diameterdediameter of the pulley at the effective width of the pulley grooveNote 1 to entry: See Figure 10.Figure 10 Effective diameter1.3.1.3effective circumferenceCedircumference of a circle with a diameter equal to t
46、he effective diameter1.3.1.4effective line differentialberadial displacement between the levels of the pitch width and the effective widthNote 1 to entry: The effective line differential is a correction term used for calculating the speed ratio when the effective diameter is given.Note 2 to entry: S
47、ee Figure 11.8 ISO 2013 All rights reserved/Tous droits rservsBS ISO 1081:2013ISO 1081:2013(E/F)Figure 11 Effective line differential1.3.2 Belts1.3.2.1effective lengthLelength of a line circumscribing a V-belt at the level of the effective diameter of the measuring pulleys whilst the V-belt is at a
48、specified tensionNote 1 to entry: The recommended method for measuring the effective length of a V-belt includes the use of a measuring fixture having two pulleys of the same effective diameter. The effective length is obtained by adding the effective circumference of one pulley to twice the measure
49、d distance between the pulley centres.2 Terms and definitions related to V-belts and ribbed pulleys2.1 General terms and definitions2.1.1 Belts2.1.1.1V-ribbed beltendless belt with a longitudinally ribbed traction surface which engages and grips, by friction, pulley grooves of similar shape2.1.1.2pitch lineany circumferential in the belt which keeps the same length when the belt is bent perpendicular to its backNote 1 to en
