1、BRITISH STANDARD BS EN ISO 2203:1997 BS 308-1.16: 1997 Technical drawing Conventional representation of gears ICS 01.100.20; 21.200BSENISO2203:1997 This British Standard, having been prepared under the directionof the Engineering SectorBoard, was published underthe authority of the StandardsBoard an
2、d comes intoeffect on 15 December 1997 BSI 04-1999 ISBN 0 580 28775 0 National foreword This British Standard is the English language version of ENISO2203:1997. It is identical with ISO2203:1973. It partially supersedes BS308-1:1993. It is envisaged that when the full range of European Standards on
3、technical drawing is implemented BS308 will be withdrawn. The UK participation in its preparation was entrusted to Technical Committee TDE/4, Engineering drawing, Metrology, Precision measurement and all related documentation, which has the responsibility to: aid enquirers to understand the text; pr
4、esent to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can
5、 be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the
6、“Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from l
7、egal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN ISO title page, page 2, the ISO title page, page ii, pages 1 to 7 and abackcover. This standard has been updated (see copyright date) and may have had amendments incorporated. This
8、will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSENISO2203:1997 BSI 04-1999 i Contents Page National foreword Inside front cover Foreword 2 Foreword ii Text of EN ISO 2203 1ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPI
9、SCHE NORM EN ISO 2203 October 1997 ICS 01.100.20; 21.200 Descriptors: See ISO document English version Technical drawings Conventional representation of gears (ISO2203:1973) Dessins techniques Reprsentation conventionnelle des engrenages (ISO2203:1973) Technische Zeichnungen Darstellung von Zahnrdem
10、 (ISO2203:1973) This European Standard was approved by CEN on 12 September 1997. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and b
11、ibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibilit
12、y of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands,
13、 Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 CEN All rights of exploitation in any form and by any means reserve
14、d worldwide for CEN national Members. Ref. No. ENISO2203:1997 EENISO2203:1997 BSI 04-1999 2 Foreword The text of the International Standard from Technical Committee ISO/TC 10 “Technical drawings, product definition and related documentation” of the International Organization for Standardization (ISO
15、) has been taken over as an European Standard by CEN/CS. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 1998, and conflicting national standards shall be withdrawn at the latest by April 19
16、98. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway,
17、Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO 2203:1973 has been approved by CEN as a European Standard without any modification. Contents Page Foreword ii 1 Scope and field of application 1 2 Detail drawings (individual ge
18、ars) 1 3 Assembly drawings (gear pairs) 3 Figure 1 1 Figure 2 1 Figure 3 1 Figure 4 2 Figure 5 2 Figure 6 2 Figure 7 2 Figure 8 3 Figure 9 3 Figure 10 4 Figure 11 4 Figure 12 5 Figure 13 5 Figure 14 6 Figure 15 6 Figure 16 7 Figure 17 7 Table 2ii BSI 04-1999 ENISO2203:1997 Foreword ISO (the Internat
19、ional Organization for Standardization) is a worldwide federation of national standards institutes (ISO Member Bodies). The work of developing International Standards is carried out through ISO Technical Committees. Every Member Body interested in a subject for which a Technical Committee has been s
20、et up 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. Draft International Standards adopted by the Technical Committees are circulated to the Member Bodies for approval before their ac
21、ceptance as International Standards by the ISO Council. International Standard ISO 2203 was drawn up by Technical Committee ISO/TC 10, Technical drawings, and circulated to the Member Bodies in January1971. It has been approved by the Member Bodies of the following countries: No Member Body expresse
22、d disapproval of the document. Descriptors: Drawings, engineering drawings, gears, chain wheels, representation. Australia Hungary Portugal Austria India Romania Belgium Ireland South Africa, Rep. of Canada Israel Sweden Chile Italy Switzerland Czechoslovakia Japan Turkey Denmark Korea, Dem.P. Rep.
23、of United Kingdom Egypt, Arab Rep. of Korea, Rep. of U.S.A. France Netherlands U.S.S.R. Germany New Zealand Greece NorwayENISO2203:1997 BSI 04-1999 1 1 Scope and field of application This International Standard establishes the conventional representation of the toothed portion of gears including wor
24、m gearing and chain wheels. It is applicable to detail drawings and assembly drawings. As a fundamental principle a gear is represented (except in axial section) as a solid part without teeth, but with the addition of the pitch surface in a thin long chain line. NOTEFor uniformity all figures in thi
25、s International Standard are in first angle projection (Method E). It should be understood that the third angle projection (Method A) could equally well have been used without prejudice to the principles established. 2 Detail drawings (individual gears) 2.1 Contours and edges Represent the contours
26、and the edges of each gear (seeFigure 1, Figure 2 and Figure 3), as if they were, in an unsectioned view, a solid gear bounded by the tip surface; in an axial section, a spur gear having two diametrically opposed teeth, represented unsectioned, even in the case of a gear that does not have spur teet
27、h or that has an odd number of teeth. 2.2 Pitch surface Draw the pitch surface with a thin, long chain line, even in concealed portions and sectional views, and represent it, in a projection normal to the axis, by its pitch circle (external pitch circle in the case of a bevel gear and the median pit
28、ch circle in the case of a worm wheel) (seeFigure 1, Figure 2 and Figure 3); in a projection parallel to the axis, by its apparent contour, extending the line beyond the gear contour on each side (seeFigure 1, Figure 2 and Figure 3). Figure 1 Figure 2 Figure 3 ENISO2203:1997 2 BSI 04-1999 2.3 Root s
29、urface As a general rule, do not represent the root surface except in sectional views. However, if it seems helpful to show it also on unsectioned views, always draw it, in this case, as a thin continuous line (seeFigure 4, Figure 5 and Figure 6). 2.4 Teeth Specify the teeth profile either by refere
30、nce to a standard or by a drawing to a suitable scale. If it is essential to show one or two teeth on the drawing itself (either to define the ends of a toothed portion or rack, or in order to specify the position of the teeth in relation to a given axial plane), draw them as thick continuous lines
31、(seeFigure 5 and Figure 6). It is necessary to indicate the direction of the teeth of a gear or rack on the view of the tooth surface in a projection parallel to the gear axes, three thin continuous lines of the corresponding form and direction should be shown (seeTable and Figure 7). Table Figure 4
32、 Figure 5 Figure 6 Tooth system Symbol Helical to the right Helical to the left Double helical Spiral NOTEIf mating gears are represented, the direction of the teeth should be shown on one gear only. Figure 7 ENISO2203:1997 BSI 04-1999 3 3 Assembly drawings (gear pairs) The specified rules for the r
33、epresentation of gears on detail drawings are equally applicable to assembly drawings. However, for a pair of bevel gears in projection parallel to the axis, extend the line drawn for the pitch surface to the point where the axes meet (seeFigure 9 and Figure 10). Neither of the two gears of a gear p
34、air is assumed to be hidden by the other in the portion in mesh (seeFigure 8), except in the following two cases: 1) if one of the gears, the whole of which is located in front of the other, effectively conceals part of it (seeFigure 9, Figure 10 and Figure 11); 2) if both gears are represented in a
35、xial section, in which case one of the two gears, chosen arbitrarily, is assumed to be partly concealed by the other (seeFigure 9). In these two cases, concealed contour edges need not be represented if they are not essential to the clarity of the drawing (seeFigure 9 and Figure 10). Figure 8 Figure
36、 9 ENISO2203:1997 4 BSI 04-1999 Figure 10 Figure 11 ENISO2203:1997 BSI 04-1999 5 3.1 External engagement of cylindrical gears 3.2 Internal engagement of cylindrical gears Figure 12 Figure 13 ENISO2203:1997 6 BSI 04-1999 3.3 Engagement of pinion with rack 3.4 Engagement of bevel gears, axis intersect
37、ion at any angle Figure 14 Figure 15 ENISO2203:1997 BSI 04-1999 7 3.5 Engagement with cylindrical worm, in cross-section 3.6 Chain wheels Figure 16 Figure 17 BS EN ISO 2203:1997 BS 308-1.16: 1997 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national
38、body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions BritishStandards are updated by amendment or revision. Users of BritishStandards should make sure that they possess the lates
39、t amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this BritishStandard would inform the Secretary of the technical committee responsible, the identity of which can
40、 be found on the inside front cover. Tel:02089969000. Fax:02089967400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, international and foreign standards publica
41、tions should be addressed to Customer Services. Tel:02089969001. Fax:02089967001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as BritishStandards, unless otherwise requested. Information on standards BSI provi
42、des a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel:0
43、2089967111. Fax:02089967048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel:02089967002. Fax:02089967001. Copyright Copyrig
44、ht subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the internationalstandardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or
45、 by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel:02089967070.
