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1、BRITISH STANDARD BS EN ISO 2203:1997 BS 308-1.16: 1997 Technical drawing Conventional representation of gears ICS 01.100.20; 21.200 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 15 04:59:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 2203:1997 This British Standard, having been prepar
2、ed under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 December 1997 BSI 04-1999 ISBN 0 580 28775 0 National foreword This British Standard is the English language version of EN ISO 2203:1997. It is identical with
3、ISO 2203:1973. It partially supersedes BS 308-1:1993. It is envisaged that when the full range of European Standards on technical drawing is implemented BS 308 will be withdrawn. The UK participation in its preparation was entrusted to Technical Committee TDE/4, Engineering drawing, Metrology, Preci
4、sion measurement and all related documentation, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related interna
5、tional and European developments and promulgate them in the UK. A list of organizations represented on this committee can 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 i
6、n the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “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 ar
7、e responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN ISO title page, page 2, the ISO title page, page ii, pages
8、1 to 7 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Wed Nov
9、 15 04:59:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 2203:1997 BSI 04-1999i Contents Page National forewordInside front cover Foreword2 Forewordii Text of EN ISO 22031 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 15 04:59:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Lic
10、ensed Copy: sheffieldun sheffieldun, na, Wed Nov 15 04:59:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 2203 October 1997 ICS 01.100.20; 21.200 Descriptors: See ISO document English version Technical drawings Conventional representation of gea
11、rs (ISO 2203:1973) Dessins techniques Reprsentation conventionnelle des engrenages (ISO 2203:1973) Technische Zeichnungen Darstellung von Zahnrdem (ISO 2203:1973) This European Standard was approved by CEN on 12 September 1997. CEN members are bound to comply with the CEN/CENELEC Internal Regulation
12、s which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This Europea
13、n Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility 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 nationa
14、l standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches
15、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 reserved worldwide for CEN national Members. Ref. No. EN ISO 2203:1997 E Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 15 04:59:20 GMT+00:00 2006, Uncont
16、rolled Copy, (c) BSI EN ISO 2203:1997 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) has been taken over as an European Sta
17、ndard 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 1998. According to the CEN/CENELEC Interna
18、l Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland an
19、d 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 Forewordii 1Scope and field of application1 2Detail drawings (individual gears)1 3Assembly drawings (gear pairs)3 Figu
20、re 11 Figure 21 Figure 31 Figure 42 Figure 52 Figure 62 Figure 72 Figure 83 Figure 93 Figure 104 Figure 114 Figure 125 Figure 135 Figure 146 Figure 156 Figure 167 Figure 177 Table2 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 15 04:59:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Cop
21、y: sheffieldun sheffieldun, na, Wed Nov 15 04:59:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii BSI 04-1999 EN ISO 2203:1997 Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards institutes (ISO Member Bodies). The work of developing Inte
22、rnational Standards is carried out through ISO Technical Committees. Every Member Body interested in a subject for which a Technical Committee has been set up has the right to be represented on that Committee. International organizations, governmental and non-governmental, in liaison with ISO, also
23、take part in the work. Draft International Standards adopted by the Technical Committees are circulated to the Member Bodies for approval before their acceptance as International Standards by the ISO Council. International Standard ISO 2203 was drawn up by Technical Committee ISO/TC 10, Technical dr
24、awings, and circulated to the Member Bodies in January 1971. It has been approved by the Member Bodies of the following countries: No Member Body expressed disapproval of the document. Descriptors: Drawings, engineering drawings, gears, chain wheels, representation. AustraliaHungaryPortugal AustriaI
25、ndiaRomania BelgiumIrelandSouth Africa, Rep. of CanadaIsraelSweden ChileItalySwitzerland CzechoslovakiaJapanTurkey DenmarkKorea, Dem.P. Rep. ofUnited Kingdom Egypt, Arab Rep. ofKorea, Rep. ofU.S.A. FranceNetherlandsU.S.S.R. GermanyNew Zealand GreeceNorway Licensed Copy: sheffieldun sheffieldun, na,
26、Wed Nov 15 04:59:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 2203:1997 BSI 04-19991 1 Scope and field of application This International Standard establishes the conventional representation of the toothed portion of gears including worm gearing and chain wheels. It is applicable to detail dr
27、awings 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 this International Standard are in first angle projection (M
28、ethod 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 and the edges of each gear (see Figure 1, Figure 2 and Fi
29、gure 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 teeth or that has an odd number of teeth. 2.2 Pitch surface
30、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 pitch circle in the case of a worm wheel) (see Figure 1, Fi
31、gure 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 (see Figure 1, Figure 2 and Figure 3). Figure 1 Figure 2 Figure 3 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 15 04:59:20 GMT+00:00 2006, Uncontrolled
32、Copy, (c) BSI EN ISO 2203:1997 2 BSI 04-1999 2.3 Root surface 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 (see Figure 4, Figure 5 and Figure
33、6). 2.4 Teeth Specify the teeth profile either by reference 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
34、given axial plane), draw them as thick continuous lines (see Figure 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 directio
35、n should be shown (see Table and Figure 7). Table Figure 4 Figure 5 Figure 6 Tooth systemSymbol 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 Licensed Copy: sheffieldun sheffie
36、ldun, na, Wed Nov 15 04:59:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 2203:1997 BSI 04-19993 3 Assembly drawings (gear pairs) The specified rules for the representation of gears on detail drawings are equally applicable to assembly drawings. However, for a pair of bevel gears in projection
37、 parallel to the axis, extend the line drawn for the pitch surface to the point where the axes meet (see Figure 9 and Figure 10). Neither of the two gears of a gear pair is assumed to be hidden by the other in the portion in mesh (see Figure 8), except in the following two cases: 1) if one of the ge
38、ars, the whole of which is located in front of the other, effectively conceals part of it (see Figure 9, Figure 10 and Figure 11); 2) if both gears are represented in axial section, in which case one of the two gears, chosen arbitrarily, is assumed to be partly concealed by the other (see Figure 9).
39、 In these two cases, concealed contour edges need not be represented if they are not essential to the clarity of the drawing (see Figure 9 and Figure 10). Figure 8 Figure 9 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 15 04:59:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 2203:1997 4 B
40、SI 04-1999 Figure 10 Figure 11 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 15 04:59:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 2203:1997 BSI 04-19995 3.1 External engagement of cylindrical gears 3.2 Internal engagement of cylindrical gears Figure 12 Figure 13 Licensed Copy: sheffie
41、ldun sheffieldun, na, Wed Nov 15 04:59:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 2203:1997 6 BSI 04-1999 3.3 Engagement of pinion with rack 3.4 Engagement of bevel gears, axis intersection at any angle Figure 14 Figure 15 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 15 04:59:20 GMT
42、+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 2203:1997 BSI 04-19997 3.5 Engagement with cylindrical worm, in cross-section 3.6 Chain wheels Figure 16 Figure 17 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 15 04:59:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 2203:1997 BS 308-1.16
43、: 1997 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British St
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