1、 Reference number ISO 3842:2006(E) ISO 2006INTERNATIONAL STANDARD ISO 3842 Fourth edition 2006-12-15 Road vehicles Fifth wheels Interchangeability Vhicules routiers Sellette dattelage Interchangeabilit ISO 3842:2006(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with A
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6、. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2006 All rights reservedISO 3842:2006(E) ISO 2006 All rights reserved iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standard
7、s 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 organiz
8、ations, 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 given in
9、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 75 % o
10、f 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 Technical Committee ISO/TC 22, Road vehi
11、cles, 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. INTERNATIONAL STANDARD ISO 3842:2006(E) ISO 2006 All rights reserved 1 Road vehicles Fifth whee
12、ls Interchangeability 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
13、vehicles for semi-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 strengt
14、h requirements 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
15、the referenced 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 se
16、mi-trailer fifth 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 Inter
17、national Standard; 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)
18、 according to Table 2 for direct-mounted fifth wheels according to Clause 5. ISO 3842:2006(E) 2 ISO 2006 All rights reservedEXAMPLES 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 cl
19、ass 4: Fifth wheel ISO 3842 FW 90-4; 50 mm 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
20、as shown in Figure 1. The position of the fixing 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 moun
21、ting plate ISO 3842:2006(E) ISO 2006 All rights reserved 3 Dimensions in millimetres 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 a
22、ngle 40 + 1 must be realized at least for the length 360 mm. The entry width 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
23、 or means of equal strength (e.g. flat steel plate) shall be used. Figure 2 Dimensions of fifth wheels ISO 3842:2006(E) 4 ISO 2006 All rights reserved4.2 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
24、respect to the longitudinal and transverse axes of the fifth wheel. 90 mm fifth wheels (FW 90) shall be 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
25、considered) shall be 12 minimum as shown in Figure 2. A lateral angle of maximum 3 is permissible (see 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 o
26、f standard fifth wheel height Dimensions in millimetres FW class 1 class 2 class 3 class 4 class 5 class 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 introdu
27、ction area at the top of the fifth wheel plate is defined as shown in Figure 3 in order to show the area 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 s
28、harp edges are allowed on the trailer plate. The trailer plate shall be designed with adequate longitudinal 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. ISO 3842:2006(E) ISO 2006 All rights rese
29、rved 5 Dimensions in millimetres Key 1 longitudinal support of the trailer chassis 2 cross bar of the trailer chassis 3 area of force 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
30、 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 the fifth wheel coupling shall be within one of the classes specified in Table 2. ISO 3842:2006(E) 6 ISO 2006 All rights reservedDimensions in millimetres Key 1 trac
31、tor 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. A higher number of holes is recommended to give the possibility of moving the direct-mounted fifth wheel on the frame. The combination o
32、f 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 thereof) may be used. Figure 4 Dimensions and location of fixing holes on the tractor subframe and on the fifth wheel Table 2 Classes of tran
33、sversal 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 direct-mounted fifth wheels (DFW 50) is adequate with minimum 12 bolts, size M16, minimum property class 8.8, placed symmetrically with respe
34、ct to the longitudinal and transverse axes of the fifth wheel. Original Equipment Manufacturer (OEM) approval is required for all direct-mounted fifth wheel installations. ISO 3842:2006(E) ISO 2006 All rights reserved 7 5.3 Inclination angles Longitudinal inclination of the fifth wheel not installed
35、 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 permissible (see ISO 1726) for fifth wheels complying with this International Standard. 5.4 Height The height H
36、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 the fifth wheel. Table 3 Classes of direct-mounted fifth wheel height Dimensions in millimetres DFW class
37、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 fixing holes (see 5.1), as shown in Figure 2. 5.6 Minimum force introduction area Provisions given in 4.6 shall apply. ISO 3842:2006(E) ICS 43.040.70 Price based on 7 pages ISO 2006 All rights reserved
