BS AU 210-2-1994 Drawbars for caravans and light trailers - Specification for the design of aluminium drawbars and chassis《大篷车和轻型挂车用拉杆 第2部分 铝拉杆和底盘设计规范》.pdf
《BS AU 210-2-1994 Drawbars for caravans and light trailers - Specification for the design of aluminium drawbars and chassis《大篷车和轻型挂车用拉杆 第2部分 铝拉杆和底盘设计规范》.pdf》由会员分享,可在线阅读,更多相关《BS AU 210-2-1994 Drawbars for caravans and light trailers - Specification for the design of aluminium drawbars and chassis《大篷车和轻型挂车用拉杆 第2部分 铝拉杆和底盘设计规范》.pdf(14页珍藏版)》请在麦多课文档分享上搜索。
1、BRITISH STANDARD BS AU 210-2:1994 Drawbars for caravans and light trailers Part 2: Specification for the design of aluminium drawbars and chassis UDC 629.11-43 + 728.76:629.11.011.1BSAU210-2:1994 This British Standard, having been prepared under the directionof the Automobile Standards Policy Commit
2、tee, waspublished under the authorityof the Standards Boardand comes into effect on 15July1994 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference AUE 8 Draft for comment 92 76306 DC ISBN 0 580 22324 8 Committees responsible for this British Standard The
3、 preparation of this British Standard was entrusted by the Automobile Standards Policy Committee (AUE/-) to Technical Committee AUE/8, upon which the following bodies were represented: Association of Trailer Manufacturers British Compressed Air Society Caravan Club Department of Transport National C
4、aravan Council Limited Society of Motor Manufacturers and Traders Ltd. Coopted members Amendments issued since publication Amd. No. Date CommentsBSAU210-2:1994 BSI 11-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 References 1 3 Definitions 1 4 Symbols 1 5 Res
5、istance calculation for drawbars 4 6 Deflection calculation 4 7 Fatigue 4 8 Mechanical design of chassis 7 9 Chassis strength 7 10 Joining of body to chassis 7 Figure 1 Drawbar reference dimensions 2 Figure 2 Curves relating maximum stress and stress ratio for 10 8life cycles 6 Table 1 Properties of
6、 aluminium alloys 3 Table 2 Permissible stresses for aluminium alloys 5 List of references Inside back coverBSAU210-2:1994 ii BSI 11-1999 Foreword This Part of BS AU210 was prepared under the direction of the Automobile Standards Policy Committee. Since the drawbar is only one part of the chassis of
7、 a caravan or light trailer, and as the chassis can be made of materials other than steel, or even be of composite construction, this Part of BS AU210 aims to set out requirements for the design of aluminium chassis for caravans and light trailers A British Standard does not purport to include all t
8、he 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 comprises a front cover, an inside front cover, pagesi andii,
9、pages1 to8, an inside back cover 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.BSAU210-2:1994 BSI 11-1999 1 1 Scope This Part of BS AU210 specifies: a) a procedur
10、e for determining the mechanical strength of drawbars for caravans and light trailers where the vertical static force on the coupling head is not less than245N and not greater than735N; b) requirements for the mechanical design of the chassis for caravans and light trailers. This standard applies to
11、 aluminium chassis of caravans and light trailers provided they are not of welded construction. It also covers the aluminium elements of chassis of composite construction, again provided the aluminium parts have not been welded. NOTEThe method for calculation of the mechanical strength of steel draw
12、bars for caravans and light trailers is covered in BSAU210-1. 2 References 2.1 Normative references This Part of BS AU210 incorporates, by reference, provisions from specific editions of other publications. These normative references are cited at the appropriate points in the text and the publicatio
13、ns are listed on the inside back cover. Subsequent amendments to, or revisions of, any of these publications apply to this Part of BS AU210 only when incorporated in it by updating or revision. 2.2 Informative references This Part of BS AU210 refers to other publications that provide information or
14、guidance. Editions of these publications current at the time of issue of this standard are listed on the inside back cover, but reference should be made to the latest editions. 3 Definitions For the purposes of this Part of BS AU210, the definitions given in BS8118 apply, together with the following
15、. 3.1 chassis the element, including the drawbar, between the axle assembly and the body of the caravan or light trailer 3.2 drawbar that part of the chassis which enables the connection of the caravan or light trailer to the towing vehicle 4 Symbols For the purposes of this Part of BS AU210, the fo
16、llowing symbols are used. l is the distance (in mm) from the vertical axis of the coupling device to the first point on the trailer frame (seeFigure 1). l x is the distance (in mm) from the vertical axis of the coupling device to the drawbar section corresponding to the maximum strain rate (seeFigur
17、e 1). e is the distance (in mm) from the horizontal axis of the coupling device to the drawbar neutral axis at the first fixing point on the trailer frame (seeFigure 1). e x is the distance (in mm) from the horizontal axis of the coupling device to the drawbar neutral axis at the cross section corre
18、sponding to the maximum strain rate (seeFigure 1). d is the maximum deflection (in mm) at the coupling device relative to the first fixing point (seeFigure 1). P is the manufacturers total mass (in kg) of the caravan or light trailer (see ISO7237). D is the value determined by calculation for the lo
19、ngitudinal force (in N) occurring between the tractor vehicle and the trailer (see ISO3853). E is the modulus of elasticity (in N/mm 2 ); its value varies according to the alloy (seeTable 1). I is the moment of inertia (in mm 4) ) of the section. g is the acceleration due to gravity (in m/s 2 ) (see
20、 ISO3853).BSAU210-2:1994 2 BSI 11-1999 Figure 1 Drawbar reference dimensionsBS AU 210-2:1994 BSI 11-1999 3 Table 1 Properties of aluminium alloys Alloy BS or international no. a Condition Form Thickness 0.2% tensile proof stress Tensile strength Elongation 0.2% compressive proof stress Bearing stren
21、gth Modulus of elasticity b Density Durability rating c Min. Max. 5.65S 0 50 mm mm mm N/mm 2 N/mm 2 % % N/mm 2 N/mm 2 N/mm 2 kg/m 3 6082 TF extrusions 20 20 150 d 255 270 295 310 8 8 7 same as tensile 618 68 900 2 710 B sheet and plate 0.2 3.0 255 295 8 587 3.0 25 240 295 8 drawn tube 6.0 255 310 7
22、7 618 6.0 10 240 310 9 5083 M extrusions 150 d 130 280 12 11 same as tensile 556 68 900 2 660 A sheet 3.0 25 O extrusions 150 d 125 275 14 13 118 525 sheet and plate 0.2 25 14 12-16 556 6063 TF extrusions 150 d 160 185 8 7 same as tensile 386 65 500 2 710 B TE extrusions 25 110 150 8 7 324 6061 TF e
23、xtrusions 150 d 240 280 8 7 tensile 556 68 900 2 710 B 2014A TB extrusions 20 230 370 11 10 206 664 72 400 2 800 C TF extrusions 20 370 435 7 6 same as tensile 772 clad sheet 3.0 12.5 365 425 8 726 68 900 A e clad plate 12.5 25 380 440 6 5251 H3 sheet 0.2 6.0 130 200 4-8 115 463 68 900 2 690 A 5154A
24、 H2 sheet 0.2 6.0 165 245 5-8 150 494 2 670 7020 TB extrusions 25 190 300 12 10 same as tensile 600 71 700 2 800 B sheet and plate 0.2 25 170 280 560 TF extrusions 25 280 340 10 8 660 sheet and plate 0.2 25 270 320 630 a See BS 1470. b For modulus of rigidity multiply by 0.38. c See BS 8118-1:1991 c
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