1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58ICS 43.040.70Road vehicles Fifth wheels Interchangeability BRITISH STANDARDBS ISO 3842:2006BS ISO 3
2、842:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 March 2007 BSI 2007ISBN 978 0 580 50254 5Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date Commentsrequ
3、ested a correction to be made to this standard prior to publication but this was not forthcoming. The angle of lateral inclination referred to in paragraphs 4.3 and 5.3 of this standard does not align with the 2 degrees specified in ISO 1726-2 for low-coupling tractors. It is the opinion of AUE/13 t
4、hat the 2 degree angle of lateral inclination specified in ISO 1726-2 is appropriate.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.National forewordThis British Standard was published by BSI. It is the UK im
5、plementation of ISO 3842:2006.The UK participation in its preparation was entrusted to Technical Committee AUE/13, Commercial and public service vehicles.A list of organizations represented on AUE/13 can be obtained on request to its secretary.Attention is drawn to the fact that the UK Technical Com
6、mittee AUE/13 Reference numberISO 3842:2006(E)INTERNATIONAL STANDARD ISO3842Fourth edition2006-12-15Road vehicles Fifth wheels Interchangeability Vhicules routiers Sellette dattelage Interchangeabilit BS ISO 3842:2006ii iiiForeword ISO (the International Organization for Standardization) is a worldw
7、ide federation of national standards 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 th
8、at committee. International organizations, 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
9、accordance with the rules given 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 r
10、equires approval by at least 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 3842 was prepared by Techn
11、ical Committee ISO/TC 22, Road vehicles, Subcommittee SC 15, Interchangeability of components of commercial vehicles and buses. This fourth edition cancels and replaces the third edition (ISO 3842:2001), which has been technically revised. BS ISO 3842:2006blank1Road vehicles Fifth wheels Interchange
12、ability 1 Scope This International Standard lays down the dimensional characteristics necessary for mounting and interchangeability of the fifth wheel mounted on a mounting plate (standard fifth wheel, Clause 4) or directly on the frame (direct-mounted fifth wheel, Clause 5) of towing vehicles for s
13、emi-trailers. It applies to the fifth wheels intended to hitch on semi-trailers equipped with a: 50 coupling pin as defined in ISO 337; 90 coupling pin as defined in ISO 4086. Dimensions not specified are left to the discretion of the component manufacturer. Test conditions and strength requirements
14、 to be met by 50 and 90 fifth wheel coupling are specified in ISO 8717. 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
15、 document (including any amendments) applies. ISO 337, Road vehicles 50 semi-trailer fifth wheel coupling pin Basic and mounting/interchangeability dimensions ISO 1726, Road vehicles Mechanical coupling between tractors and semi-trailers Interchangeability ISO 4086, Road vehicles 90 semi-trailer fif
16、th wheel kingpin Interchangeability ISO 8717, Commercial road vehicles Fifth wheel couplings Strength tests 3 Designation Fifth wheels meeting the requirements of this International Standard shall be identified by the following details in the order specified: 1) reference to this International Stand
17、ard; 2) code FW 50 for 50 mm fifth wheels and FW 90 for 90 mm fifth wheels according to Clause 4; 3) or code DFW 50 for 50 mm direct-mounted fifth wheels according to Clause 5; 4) number of class of fifth wheel height H according to Tables 1 or 3; 5) class of transversal width (A or B) according to
18、Table 2 for direct-mounted fifth wheels according to Clause 5. BS ISO 3842:20062 EXAMPLES 50 mm fifth wheel coupling having a height within the range of class 1: Fifth wheel ISO 3842 FW 50-1; 90 mm fifth wheel coupling having a height within the range of class 4: Fifth wheel ISO 3842 FW 90-4; 50 mm
19、direct-mounted fifth wheel coupling having a width of Class A and a height within the range of class 1: Direct-mounted fifth wheel ISO 3842 DFW 50-1-A. 4 Standard fifth wheels 4.1 Fixing holes The position of the fixing holes on the mounting plate shall be as shown in Figure 1. The position of the f
20、ixing holes on the fifth wheel coupling shall be as shown in Figure 2. Dimensions in millimetres Key 1 coupling pin 1 (in accordance with ISO 337 or ISO 4086) 2 longitudinal axis of towing vehicle Figure 1 Dimensions and location of fixing holes on the mounting plate BS ISO 3842:20063Dimensions in m
21、illimetres Key 1 section with coupling pin 2 bearing surface for steering wedge aTo provide for the use of steering wedges, measure the reference dimension, k = 137 3 mm, 32 mm below the topface at a distance of 200 mm. bThe angle 40 + 1 must be realized at least for the length 360 mm. The entry wid
22、th W 350 mm may alternatively be executed according to the dotted contour. cInstead of elongated holes 23 2 17 + 2 mm, holes with 17 + 2 mm are also allowed. dWhen using elongated holes or holes 18 mm, washers 40 mm 6 mm thick or means of equal strength (e.g. flat steel plate) shall be used. Figure
23、2 Dimensions of fifth wheels BS ISO 3842:20064 4.2 Mounting Mounting of 50 mm fifth wheels (FW 50) is adequate with minimum 8 bolts, size M16, minimum property class 8.8, placed symmetrically with respect to the longitudinal and transverse axes of the fifth wheel. 90 mm fifth wheels (FW 90) shall be
24、 bolted with 12 bolts, size M16, minimum property class 8.8. 4.3 Inclination angles Longitudinal inclination of the fifth wheel not installed on the vehicle (but bolts or nuts at mounting brackets considered) shall be 12 minimum as shown in Figure 2. A lateral angle of maximum 3 is permissible (see
25、ISO 1726) for fifth wheels complying with this International Standard. 4.4 Height The height H of the fifth wheel coupling shall be within one of the classes specified in Table 1. Table 1 Classes of standard fifth wheel height Dimensions in millimetres FW class 1 class 2 class 3 class 4 class 5 clas
26、s 6 H 5 150 170 185 205 225 250 4.5 Dimensions of standard fifth wheels Standard fifth wheels shall have dimensions as shown in Figure 2. 4.6 Minimum force introduction area A minimum force introduction area at the top of the fifth wheel plate is defined as shown in Figure 3 in order to show the are
27、a in which the trailer plate forces shall be introduced (grease grooves on the surface of the fifth wheel top plate are allowed in this area). Within this outer diameter (D = 870 mm), no holes or sharp edges are allowed on the trailer plate. The trailer plate shall be designed with adequate longitud
28、inal and lateral reinforcement in the areas defined in Figure 3 in order to ensure optimal force introduction appropriate to the design of the fifth wheel. BS ISO 3842:20065Dimensions in millimetres Key 1 longitudinal support of the trailer chassis 2 cross bar of the trailer chassis 3 area of force
29、introduction Figure 3 Minimum force introduction area 5 Direct-mounted fifth wheels 5.1 Fixing holes The position of the fixing holes on the subframe and on the fifth wheel coupling shall be as shown in the respective view in Figure 4. The transversal width of the fixing holes on the subframe and on
30、 the fifth wheel coupling shall be within one of the classes specified in Table 2. BS ISO 3842:20066 Dimensions in millimetres Key 1 tractor frame 2 fifth wheel 3 coupling pin (in accordance with ISO 337 or ISO 4086) 4 longitudinal axis of towing vehicle aA minimum of 13 holes per side are required.
31、 A higher number of holes is recommended to give the possibility of moving the direct-mounted fifth wheel on the frame. The combination of elongated holes both on the fifth wheel and on the frame is not covered by this International Standard. bAlternative dimensions (spacing 100 mm or multiples ther
32、eof) may be used. Figure 4 Dimensions and location of fixing holes on the tractor subframe and on the fifth wheel Table 2 Classes of transversal width Dimensions in millimetres Class A Class B W1 (direct-mounted fifth wheel) 870 950 W2 (tractor subframe) 860 880 940 960 5.2 Mounting Mounting of dire
33、ct-mounted fifth wheels (DFW 50) is adequate with minimum 12 bolts, size M16, minimum property class 8.8, placed symmetrically with respect to the longitudinal and transverse axes of the fifth wheel. Original Equipment Manufacturer (OEM) approval is required for all direct-mounted fifth wheel instal
34、lations. BS ISO 3842:200675.3 Inclination angles Longitudinal inclination of the fifth wheel not installed on the vehicle, bolts or nuts at mounting brackets shall be minimum 12, as shown in Figure 2, for height classes 2 to 6 and minimum 10 for height class 1. A lateral angle of maximum 3 is permis
35、sible (see ISO 1726) for fifth wheels complying with this International Standard. 5.4 Height The height H of the fifth wheel coupling shall be within one of the classes specified in Table 3. NOTE For direct-mounted fifth wheels, H is the distance from the mounting face of the subframe to the top of
36、the fifth wheel. Table 3 Classes of direct-mounted fifth wheel height Dimensions in millimetres DFW class 1 class 2 class 3 class 4 class 5 class 6 H 5 150 160 175 190 225 250 5.5 Dimensions of direct-mounted fifth wheels Direct-mounted fifth wheels shall have dimensions, excluding those related to
37、fixing holes (see 5.1), as shown in Figure 2. 5.6 Minimum force introduction area Provisions given in 4.6 shall apply. BS ISO 3842:2006BS ISO BSI389 Chiswick High RoadLondonW4 4AL3842:2006BSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standard
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