BS-AU-25-1964.pdf
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1、BRITISH STANDARD AUTOMOBILE SERIES BS AU 25:1964 Supersedes S.M.M.T. Standard No. 51 Specification for Towing hook for use between trailers of 514 tons gross weight and towing vehicle UDC 629.11.013.5:629.11.013.81 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09
2、 01:52:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 25:1964 This British Standard, having been approved by the Automobile Industry Standards Committee and endorsed by the Chairman of the Engineering Divisional Council, was published under the authority of the General Council of the Institutio
3、n on 15 June 1964 BSI 02-2000 The following BSI reference relates to the work on this standard: Committee reference AUE/- ISBN 0 580 34548 3 Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:35 GMT+00:
4、00 2006, Uncontrolled Copy, (c) BSI BS AU 25:1964 BSI 02-2000i Contents Page Forewordii 1Scope1 2Materials1 3Dimensions1 4Design1 5Mounting1 6Marking1 Figure 1 Towing hook, indicating safety catch2 Figure 2 Towing hook3 Licensed Copy: London South Bank University, London South Bank University, Sat D
5、ec 09 01:52:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 25:1964 ii BSI 02-2000 Foreword This British Standard, which is published under the authority of the Automobile Industry Standards Committee of the BSI, is based upon data-sheet SMMT 51:1957 of the Society of Motor Manufacturers and Tra
6、ders Ltd. The requirements of this standard, which relate only to vehicles used on the public highways, are intended to ensure the maximum degree of interchangeability between commercial and Government department and Services standards. The material specifications are for the minimum qualities accep
7、table, and do not exclude the use of other materials provided that these are at least equal in quality so that road safety is not impaired. This standard should be used in conjunction with BS AU 291). The hook has been designed to accommodate a drawbar eye of 2 in internal diameter and 1; in stock,
8、or 3 in internal diameter and 1C in stock. The standard applies to connections to trailers of 5 14 tons gross weight. The specification for a towing hook for connections to trailers of 5 35 tons gross weight is given in BS AU 272), and for trailers of 2 5 tons gross weight in BS AU 243). NOTEIf it i
9、s required to convert the figures in this standard from British units into metric units it is recommended that the conversion factors and tables contained in BS 350, Conversion factors and tables, be used. Attention is drawn to BS 2856, Precise conversion of inch and metric sizes on engineering draw
10、ings 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 legal obligations. Summary of pages This document compr
11、ises a front cover, an inside front cover, pages i and ii, pages 1 to 3 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. 1) BS AU 29, “Drawbar eyes and forecarriage
12、 pins for connection between trailers of 5 35 tons gross weight and towing vehicle”. 2) BS AU 27, “Towing hook for use between trailers of 5 35 tons gross weight and towing vehicle”. 3) BS AU 24, “Towing connections for trailers of 2 5 tons gross weight”. Licensed Copy: London South Bank University,
13、 London South Bank University, Sat Dec 09 01:52:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 25:1964 BSI 02-20001 1 Scope This British Standard specifies the basic dimensions and quality of materials for a towing hook and its mounting, for use in connections between a towing vehicle and a tra
14、iler of 5 14 tons gross weight. The gross weights refer to gross laden train weights where more than one trailer is drawn. 2 Materials The hook shall be made from a material of quality not less than BS 970. En 5(N) 3 Dimensions Dimensions shall be as shown in Figure 1 and Figure 2. NOTEThe dimension
15、s specified are based upon a forged hook, and have been calculated on the basis of the total yield strength being equal to two thirds of the gross weight being towed. It is necessary that any other parts not covered by this standard, connecting the coupling to, the towing vehicle shall have a simila
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