BRITISH STANDARD AUTOMOBILE SERIES BS AU 146b 1970 Incorporating Amendment No 1 Specification for Standard automatic roller type coupling for semi trailers not exceeding 7 tons laden weight UDC 629 11[.]
BRITISH STANDARD AUTOMOBILE SERIES BS AU 46b:1 970 Incorp orating Am endm ent No Specification for Standard automatic roller-type coupling for semi-trailers not exceeding : tons laden weight UD C 62 1 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy BS AU 6b : 970 Fore word This British Standard, prepared under the authority of the Automobile Industry Standards Committee of the BSI, was first published in 948 The present revision incorporates additional data considered necessary as a result of experience gained in the use of the standard, by amendments to Clauses and 3.2 and to Figure It supersedes BS AU 46: 968, which is therefore withdrawn It specifies certain basic information for standard automatic roller- type coupling for connection between towing vehicles and semi- trailers to assist in obtaining maximum interchangeability between vehicles using this type of coupling Details of a roller- type coupling for use with semi- trailers from tons to # tons laden weight are given in BS AU 30, “ Standard automatic roller-type coupling for semi- trailers of tons to NOTE " tons laden weight ” Trailer manufacturers, before applying this standard, should ascertain that the dimensions of the towing vehicle are suitable Operators should verify that towing vehicles and semi- trailers are mutually suitable in all respects NOTE If it is required to convert the figures in this standard from imperial units into metric units it is recommended that the conversion factors and the tables contained in BS 350, “Conversion factors and tab les ”, be used Attention is also drawn to BS 2856, “Precision conversion of inch and metric sizes on engineering drawings ” 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 C o mp liance with a British S tand ard doe s not o f itself co nfer immunity fro m le gal ob ligations S ummary o f p age s This document comprises a front cover, an inside front cover, pages i and ii, page and a back cover This standard has been updated (see copyright date) and may have had This British Standard, having amendments incorporated This will be indicated in the amendment table on been approved by the the inside front cover Automobile Industry Standards Committee, was published under the authority of the Executive Board of Amendme nts issue d since p ub lication the Institution on December 970 © BSI 05- 2000 The following BSI references relate to the work on this standard: Committee reference AUE/- IS B N 80 5 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy Amd No Date of issue Comments 331 March 974 Indicated by a sideline in the margin BS AU 146b:1970 Contents Page Foreword Scope D imensions Braking connections E lectrical connections Figure — Automatic roller- type coupling © BSI 05- 000 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy Inside front cover i ii Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy blank BS AU 46b:1 970 3.2 Secondary braking Operation of the Scope This British Standard specifies requirements for automatic roller- type couplings for semi- trailers with a laden weight not exceeding ! tons having a maximum imposed operating weight on the rollers of # tons However, the rollers should be plated for a maximum design imposed weight of tons to provide a loading tolerance secondary braking system on the semi- trailer shall be mechanical means through the coupling turntable, for example by a push rod conforming to the dimensions shown in Figure To ensure interchangeability the effort at the push rod shall be 4 ± kN (900 ± 50 lbf) when the push rod actuator is operated at an air pressure of 585 kN/m Dimensions (85 lbf/in) Electrical connections The basic dimensions of the automatic roller- type coupling shall be shown in Figure Electrical connections between the semi- trailer and tractor shall be by a seven- pin plug and socket complying with the requirements of BS AU Braking connections 2) 3.1 Service and emergency braking Service and emergency brakes for the semi- trailer shall comply with the requirements of BS AU 23 1) , except that the parking device for the service line shall take the form of a female member without a self- sealing device connected through a double check valve (change- over valve) to the mechanical actuator for the secondary brake, so that when coupled to a trailer with mechanical brakes only, these are operated from the tractor service brake as well as by the tractor secondary brake control Figure — Automatic roller-type coupling 1) 2) BS AU 23, “General layout of b raking connections for articulated vehicles using two-line air pressure system ” BS AU , “7- pin plug and socket connector” (In course of preparation ) © BSI 05- 2000 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy BS AU 146b:1970 BSI — British Standards Institution BS I is the indep endent national b ody res p ons ib le for p rep aring Britis h S tandards It p res ents the UK view on s tandards in E urop e and at the international level I t is incorp orated b y Royal C harter Revisions Britis h S tandards are up dated b y amendment or revis ion Us ers of Britis h S tandards should make s ure that they p oss es s the latest amendments or editions It is the constant aim of BS I to imp rove the quality of our p roducts and services We would b e grateful if anyone finding an inaccuracy or amb iguity while us ing this Britis h S tandard would inform the S ecretary of the technical committee res p ons ib le, the identity of which can b e found on the inside front cover Tel: 02 89 96 90 00 Fax: 02 89 96 40 BS I offers memb ers an individual up dating s ervice called PLUS which ens ures that s ub s crib ers automatically receive the lates t editions of s tandards Buying standards O rders for all BS I, international and foreign s tandards p ub lications s hould b e addres s ed to C us tomer S ervices Tel: 899 00 Fax: 899 7001 In res p ons e to orders for international standards , it is BS I p olicy to sup p ly the BS I imp lementation of thos e that have b een p ub lis hed as Britis h S tandards, unless otherwis e requested Information on standards BS I p rovides a wide range of information on national, E urop ean and international standards through its Lib rary and its Technical H elp to E xp orters S ervice Various BS I electronic information s ervices are also availab le which give details on all its p roducts and s ervices C ontact the Information C entre Tel: 02 89 96 71 1 Fax: 02 89 96 048 S ub s crib ing memb ers of BS I are kep t up to date with s tandards develop ments and receive sub s tantial discounts on the p urchase p rice of s tandards For details of thes e and other b enefits contact Memb ership Adminis tration Tel: 02 89 96 70 02 Fax: 02 89 96 00 Copyright C op yright s ub s is ts in all BS I p ub lications BS I als o holds the cop yright, in the UK, of the p ub lications of the international s tandardization b odies E xcep t as p ermitted under the C op yright, D es igns and Patents Act 988 no extract may b e rep roduced, s tored in a retrieval s ystem or transmitted in any form or b y any means – electronic, p hotocop ying, recording or otherwis e – without p rior written p ermis s ion from BS I This does not p reclude the free us e, in the cours e of imp lementing the standard, of necess ary details such as s ymb ols, and size, typ e or grade designations I f thes e details are to b e used for any other p urp os e than imp lementation then the p rior written p ermiss ion of BS I must b e ob tained If p ermis sion is granted, the terms may include royalty p ayments or a licensing agreement D etails and advice can b e ob tained from the C op yright Manager BS I 89 C his wick H igh Road London W4 4AL Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy Tel: 02 89 96 70