1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58trailers DimensionsICS 43.040.70Road vehicles Coupling balls for caravans and light BRITISH STANDAR
2、DBS ISO 1103:2007BS ISO 1103:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2007 BSI 2007ISBN 978 0 580 54470 5Amendments issued since publicationAmd. No. Date Commentscontract. Users are responsible for its correct application.C
3、ompliance with a British Standard cannot confer immunity from legal obligations.National forewordThis British Standard is the UK implementation of ISO 1103:2007. It supersedes BS AU113C:1978 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee AUE/8, Under
4、gear for caravans and light trailers.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a Reference numberISO 1103:2007(E)INTERNATIONAL STANDARD ISO1103Fourth edition2007-06-01
5、Road vehicles Coupling balls for caravans and light trailers DimensionsVhicules routiers Boules dattelage pour caravanes et remorques lgres Caractristiques dimensionnelles BS ISO 1103:2007ii iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national st
6、andards bodies (ISO member bodies). The work of preparing International Standards is normally carried 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 o
7、rganizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules giv
8、en in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least
9、75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 1103 was prepared by Technical Committee ISO/TC 22, Roa
10、d vehicles, Subcommittee SC 4, Caravans and light trailers. This fourth edition cancels and replaces the third edition (ISO 1103:1996), which has been technically revised. BS ISO 1103:2007blank1Road vehicles Coupling balls for caravans and light trailers Dimensions 1 Scope This International Standar
11、d 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 with a coupling ball. The clearance space around the coupling ball is intended to allow coupling and decoupling of towed vehicl
12、es, as well as safe operation during coupling and uncoupling of mechanical devices. This International Standard applies to coupling balls designed to couple caravans and light trailers of categories O1and O21)to vehicles of categories M or N. It does not necessarily apply to special trailers drawn b
13、y special vehicles. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 11
14、76:1990, Road vehicles Masses Vocabulary and codes ISO 1302:2002, Geometrical Product Specifications (GPS) Indication of surface texture in technical product documentation ISO 3853:1994, Road vehicles Towing vehicle coupling device to tow caravans or light trailers Mechanical strength test UN-ECE Re
15、gulation No.26, Uniform provisions concerning the approval of vehicles with regard to their external projections UN-ECE Regulation No.55, Revision 1:2001, Uniform provisions concerning the approval of mechanical couplings components of combinations of vehicles 1) Definitions from UN-ECE Regulation N
16、o.13, incorporating the 06 series of amendments: Category O1: Single-axle trailers, other than semi-trailers, with a maximum mass not exceeding 0,75 t; Category O2: Trailers with a maximum mass not exceeding 3,5 t other than trailers of category O1; Category M: Motor vehicles with at least 4 wheels
17、designed and made for the transport of passengers; Category N: Motor vehicles with at least 4 wheels designed and made for the carriage of goods. BS ISO 1103:20072 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 1176 and ISO 3853 and the following te
18、rms and definitions apply. 3.1 coupling ball ball composed of two parts, a spherical surface and a cylindrical surface, which can be one-piece or assembled 3.2 spherical surface portion of the sphere whose upper and lower parts are limited by two horizontal planes that intersect the sphere, forming
19、circular upper and lower surfaces 3.3 cylindrical surface part of the cylinder delimited on its upper extremity by a radius that connects to the spherical surface, and on its lower part by a horizontal plane, forming a circular surface 3.4 kerb mass mass of the vehicle when it is loaded under loadin
20、g conditions indicated in ISO 1176:1990, 4.6 NOTE The loading condition indicated in ISO 1176 includes the mass of the equipment designed by the manufacturer and the spare wheel. 3.5 design mass kerb load increased by the mass of passengers (taking 68 kg per passenger) and the mass of luggage in the
21、 boot (taking 7 kg per passenger) 4 Recommendations 4.1 Load conditions Distribution of the design load Loading condition and load distribution shall be in accordance with UN-ECE Regulation No.55, Revision 1:2001, Annex 7, Appendix 1. In the case of M1 category vehicles, the vehicle mass at which th
22、e positioning of the ball shall be measured shall be either the maximum permissible mass distributed between the axles, as declared by the towing vehicle manufacturer, or the kerb mass, as defined in 3.4, plus: a) two masses, each of 68 kg, positioned in the outer seating position of each row of sea
23、ts, with the seats in the rearmost adjustable position for normal driving and travel, and with the masses located: for original equipment, coupling devices and components submitted for approval by the towing vehicle manufacturer, approximately at a point located at 100 mm in front of the “R” point f
24、or adjustable seats and 50 mm in front of the “R” point for other seats, the “R” point being determined according to UN-ECE Regulation No.14, Revision 4:2006, paragraph 5.1.1.2, or for coupling devices and components submitted for approval by an independent manufacturer and intended for replacement
25、market fitting, approximately at the position of a seated person; b) in addition, for each mass of 68 kg, an additional mass of 7 kg allowance for personal luggage shall be distributed evenly in the luggage area of the vehicle. In the case of N1 category vehicles, the towing vehicle mass at which th
26、is height shall be measured shall be the maximum permissible mass, distributed between axles as declared by the towing vehicle manufacturer. BS ISO 1103:200734.2 Dimensional characteristics 4.2.1 General The dimensions of the coupling ball shall comply with those specified in Figure 1 and the requir
27、ements in 4.2.2 and 4.2.3, including those related to using conditions. Dimensions in millimetres Surface roughness in micrometres Key 1 ISO mark aCorresponds to the class of roughness N 9, as stipulated in ISO 1302:2002. bNot necessary if the ball is in two parts. Figure 1 Dimensions of the couplin
28、g ball 4.2.2 Flat circular surface The connecting radius between the spherical surface and the cylindrical surface shall be tangential both to the cylindrical surface and to the horizontal lower surface of the ball, as defined in 3.1. The spherical surfaces, as defined in 3.2, can be circular rings
29、when the ball is composed of two assembled parts. BS ISO 1103:20074 4.2.3 Ball neck The diameter of the neck of the ball shall be between 27 mm and 29 mm, down to a horizontal plane situated at not less than 32 mm below the centre of the sphere. 4.3 Installation dimensions 4.3.1 Positioning The axis
30、 of the ball neck passes through the centre of the ball and shall be vertical down to a horizontal plane located not less than 32 mm below the centre of the ball. The theoretical geometric position of the ball centre defined by the towing device manufacturer shall be situated in a 5 mm radius sphere
31、. The centre of this sphere is defined by the vehicle manufacturer or bodybuilder in relation to the fixing point of the towing device. Further information is given in ISO 3853:1994, 7.2. The centre of the sphere shall be located at a distance from the ground between 350 mm and 420 mm when it compli
32、es with the method described in Clause 5, except for N2, N3 and off road2)vehicles. 4.3.2 Clearance space around the coupling ball a) The clearance space to be maintained around the coupling ball shall be as indicated in Figure 2. This clearance space is provided to allow normal coupling and uncoupl
33、ing operations with angles 10 and 60. It shall be possible to handle the coupling head or any device adaptable to the ball in the clearance space defined in Figures 2 a) and 2 b). This clearance space enables displacements of the coupling head up to = 25 and = 60. b) The clearance space may be occup
34、ied by removable equipment, such as a spare wheel. It is recommended that such equipment be mounted to one side of the coupling, to allow adequate access and reduce the risk of (hand) injuries to users during coupling and uncoupling. c) When a trailer is not coupled to the towing vehicle, the mounte
35、d towing bracket and coupling ball shall not obscure the mounting space provided for the rear registration plate, nor affect the visibility of the rear registration plate of the towing vehicle. If coupling balls or other items do obscure the registration plate, they shall be removable or repositiona
36、ble without the use of tools, except for example an easily operated (i.e. an effort not exceeding 20 Nm) release key which is carried in the vehicle. When such parts are dismantled, the parts of the coupling device that are still mounted on the vehicle shall comply with UN-ECE Regulation No.26, deal
37、ing with exterior edges. 2) Category G, as defined in UN-ECE Regulation No.03. BS ISO 1103:20075Dimensions in millimetres Key 1 clearance space 2 ground displacement of coupling head aVertical plane limited by height and width of vehicle. bSee 4.3.2. cSee 4.3.1. a) Profile view (section AA) Figure 2
38、 (continued) BS ISO 1103:20076 Dimensions in millimetres Key 1 clearance space displacement of coupling head aVertical plane limited by height and width of vehicle. bSee 4.3.2. b) View from above (section BB) Figure 2 Clearance space around the coupling ball BS ISO 1103:200775 Checking procedure for
39、 the positioning of the ball The procedure described below shall be used to check the distance between the centre of the sphere and the ground specified in 4.3.1. a) The vehicle shall be at rest on a horizontal flat and rigid surface. b) The steered wheels shall be parallel to the longitudinal media
40、n plane of the vehicle. c) The pressure of the tyres shall be adjusted to the pressure recommended by the manufacturer for the specified loading condition. d) The load of the vehicle shall conform to the load specified in 4.1. e) The brakes shall not be run and the transmission shall be in the neutr
41、al position, or in “N” or “P” positions for the vehicles equipped with an automatic or semi-automatic transmission. f) The vehicles equipped with hydro pneumatic, hydraulic or pneumatic suspension or a device for automatic adjustment according to the load shall be tested in the conditions specified
42、by the manufacturer. 6 Marking Coupling balls complying with the requirements of this International Standard shall have the marking “ISO 50” applied on the flat circular surface of diameter (17 2) mm, as defined in Figure 1. This marking only implies dimensional conformity with Figure 1. If necessar
43、y, this marking may be complemented by a marking ensuring traceability and by the marking prescribed in ISO 3853. Coupling balls which do not conform totally to this International Standard shall have the marking indicating the diameter of the spherical surface. BS ISO 1103:20078 Bibliography 1 ISO 2
44、86-2:1988, ISO system of limits and fits Part 2: Tables of standard tolerance grades and limit deviations for holes and shafts 2 ISO 2958, Road vehicles Exterior protection for passenger cars 3 UN-ECE Regulation No.03, Uniform provisions concerning the approval of retro-reflecting devices for power-
45、driven vehicles and their trailers 4 UN-ECE Regulation No.13, Uniform provisions concerning the approval of vehicles with regard to braking, incorporating the 06 series of amendments 5 UN-ECE Regulation No.14, Revision 4:2006, Uniform provisions concerning the approval of vehicles with regard to saf
46、ety-belt anchorages, ISOFIX anchorages systems and ISOFIX top tether anchorages 6 UN-ECE Regulation No.23, Revision 2:2003, Uniform provisions concerning the approval of reversing lamps for power-driven vehicles and their trailers BS ISO 1103:2007blankBS ISO BSI389 Chiswick High RoadLondonW4 4AL1103
47、:2007BSI British Standards InstitutionBSI 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.RevisionsBritish Standards are updated by amendment or revision.
48、Users of British Standards should make sure that they possess the latest 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 British Standard would inform the Secr
49、etary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400.BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards.Buying standardsOrders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel: +44 (0)20 8996 9001. Fax: +44 (0)2
