ISO-1103-1996.pdf
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1、INTERNATIONAL STANDARD IS0 1103 Third edition 1996-03-01 Road vehicles - Coupling balls for caravans and light trailers - Dimensions Vkhicules routiers - Boules dattelage pour caravanes et remorques kg&es - Caractkistiques dimensionnelles Reference number IS0 1103:1996(E) Copyright International Org
2、anization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 01:19:00 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 1103:1996(E) Foreword IS0 (the International Organization for Standard
3、ization is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to b
4、e represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International
5、Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 1103 was prepared by Technical Committee ISO/TC 22, Road vehicles,
6、 Subcommittee SC 4, Caravans and light trailers. This third edition cancels and replaces the second edition (IS0 1103:1976), of which it constitutes a technical revision. Annex A of this International Standard is for information only 0 IS0 1996 All rights reserved. Unless otherwise specified, no par
7、t of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case Postale 56 ? CH-1211 Geneve 20 ? Switzerland Printed
8、in Switzerland ii Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 01:19:00 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD 6 IS0
9、IS0 1103:1996(E) Road vehicles - Coupling balls for caravans and light trailers - Dimensions 1 Scope This International Standard lays down the dimensions necessary for the compatibility of mechanical coupling devices between light trailers or caravans and towing vehicles when the latter are fitted w
10、ith a coupling ball. The clearance space around the coupling ball is in- tended to allow coupling and decoupling of towed vehicles, and safe operation during coupling and un- coupling of mechanical devices. This International Standard applies to coupling balls designed for caravans and light trailer
11、s of categories 0, and O,lr , which have a maximum authorized total mass (ISO-M081, as defined in IS0 1176, less than or equal to 3,5 t. It does not necessarily apply to special trailers drawn by special vehicles. 2 Normative references The following standards contain provisions which, through refer
12、ence in this text, constitute provisions of this International Standard. At the time of publi- cation, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying th
13、e most re- cent editions of the standards indicated below. Members of IEC and IS0 maintain registers of cur- rently valid International Standards. IS0 1176:1990, Road vehicles - Masses - Vocabu- lary and codes. IS0 3853:1994, Road vehicles - Towing vehicle coupling device to tow caravans or light tr
14、ailers - Mechanical strength test. 3 Dimensional characteristics 3.1 Coupling ball 3.1.1 The dimensions and tolerances of coupling balls shall conform to those shown in figure 1 and the requirements of 3.1.2 to 3.1.5. 3.1.2 The diameter of the spherical part of the sur- fa%e of the coupling ball sha
15、ll be 50 h13 (50 mm -039 ALL 3.1.3 The surface referred to in 3.1.2 is the portion of a sphere, the upper part of which is limited by a horizontal plane which forms a flat circular surface of diameter (17 k 2) mm. The lower part is limited by a horizontal plane which is located at least 15 mm be- lo
16、w the centre of the sphere. 3.1.4 The connecting radius between the ball and the neck should be tangential both to the neck and to the lower horizontal surface as defined in 3.1.3. 3.1.5 The diameter of the neck of the ball shall be between 27 mm and 29 mm, down to a horizontal plane situated at not
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