《BS-ISO-7867-1-2005.pdf》由会员分享，可在线阅读，更多相关《BS-ISO-7867-1-2005.pdf（26页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS ISO 7867-1:2005 Tyres and rims (metric series) for agricultural tractors and machines Part 1: Tyre designation, dimensions and marking, and tyre/rim coordination ICS 83.160.30 ? Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:17:40 GMT+00:00 2006, Uncontrolled Copy, (c)
2、 BSI BS ISO 7867-1:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 26 August 2005 BSI 26 August 2005 ISBN 0 580 46472 5 National foreword This British Standard reproduces verbatim ISO 7867-1:2005 and implements it as the UK national stan
3、dard. It supersedes BS AU 50-1.4.5a:1996 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee AUE/4, Tyres and wheels for motor vehicles, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to i
4、ts secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue
5、or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the te
6、xt; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover,
7、 an inside front cover, the ISO title page, The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments pages ii to iv, pages 1 to 18, an inside back cover and a back cover. Licensed Copy: sheffieldun shef
8、fieldun, na, Sun Nov 26 14:17:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 7867-1:2005(E) INTERNATIONAL STANDARD ISO 7867-1 Fourth edition 2005-06-15 Tyres and rims (metric series) for agricultural tractors and machines Part 1: Tyre designation, dimensions and marking, and tyre
9、/rim coordination Pneumatiques et jantes (srie millimtrique) pour tracteurs et machines agricoles Partie 1: Dsignation, cotes et marquage des pneumatiques, coordination pneumatiques/jantes BS ISO 7867-1:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:17:40 GMT+00:00 2006, Uncontrolled
10、 Copy, (c) BSI ii Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:17:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iii Contents Page Foreword iv 1 Scope . 1 2 Normative references. 1 3 Terms and definitions. 2 4 Tyre designation. 2 5 Marking 5 6 Tyre dimensions . 5 7 Tyre dimensions . 7 8
11、Method of measurement of tyre dimensions. 7 9 Tyre and rim coordination . 8 Annex A (normative) Tyre dimensions 9 Annex B (normative) Approved rim widths. 11 Annex C (informative) Approved rim contours . 13 Bibliography. 18 BS ISO 7867-1:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14
12、:17:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. E
13、ach member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the Internati
14、onal Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in 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 Standa
15、rds adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires 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
16、 of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 7867-1 was prepared by Technical Committee ISO/TC 31, Tyre, rims and valves, Subcommittee SC 5, Agricultural tyres and rims. This fourth edition cancels and replaces the third edition (ISO 7867-1:
17、1996), which has been technically revised. ISO 7867 consists of the following parts, under the general title Tyres and rims (metric series) for agricultural tractors and machines: Part 1: Tyre designation, dimensions and marking, and tyre/rim coordination Part 2: Service description and load ratings
18、 BS ISO 7867-1:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:17:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 1 Tyres and rims (metric series) for agricultural tractors and machines Part 1: Tyre designation, dimensions and marking, and tyre/rim coordination 1 Scope This part of ISO
19、7867 establishes the size designation, the dimensional calculation and the markings of the metric series of tyres primarily intended for use on agricultural tractors and machines. Tyre and rim coordination is also given. It applies to bias-belted, diagonal and radial tyres mounted an 5 tapered rims,
20、 as specified in ISO 4251-3. Only established rim diameters and widths within the ranges in Tables 1 and 2 are recommended. This part of ISO 7867 also applies to different concepts and types of tyres and rims; in this case, however, appropriate rim/section ratios K1 and coefficients K2, a and b will
21、 be established and added. Dimensions of existing rims are specified in ISO 4251-3. NOTE Tyres (ply rating marked series) and rims for agricultural tractors and machines are specified in ISO 4251-1 to ISO 4251-5. Service description (load index speed symbol) marking of the existing series of agricul
22、tural tractor-drive- wheel tyres is given in ISO 8664. 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 document (includ
23、ing any amendments) applies. ISO 4223-1:2002, Definitions of some terms used in the tyre industry Part 1: Pneumatic tyres ISO 4251-3:1994, Tyres (ply rating marked series) and rims for agricultural tractors and machines Part 3: Rims ISO 7867-2, Tyres and rims (metric series) for agricultural tractor
24、s and machines Part 2: Service description and load ratings BS ISO 7867-1:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:17:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 3 Terms and definitions For the purposes of this part of ISO 7867, the terms and definitions given in ISO 4223-1
25、 and the following apply. 3.1 agricultural tyre for special cultivation work tyre for use on wheels (usually tractor drive wheels) on agricultural machines engaged in surface work or linear cultivation and the transport on roads and tracks of the tools required for such work 4 Tyre designation 4.1 G
26、eneral The designation of the tyre shall be shown on its sidewall and shall include the following markings close to each other: size and construction characteristics (see 4.2); service description (see 4.3). 4.2 Size and construction characteristics 4.2.1 General The size and construction characteri
27、stics shall be indicated as follows: 4.2.2 Nominal section width The nominal section width shall be expressed in millimetres and shall end in 0. 4.2.3 Nominal aspect ratio The nominal aspect ratio shall be expressed as a percentage and shall be a multiple of 5. 4.2.4 Tyre construction code The tyre
28、construction code shall be as follows: “B” for bias-belted construction; “D” for diagonal/bias construction; “R” for radial construction. NOTE Other codes will be established for new concepts (constructions) of tyres. 4.2.5 Nominal rim diameter code For tyres mounted on 5 tapered rims, the rim diame
29、ter shall be expressed by a code comprising 1 or 2 digits. The code shall be as given in Table 1. For tyres requiring new-concept rims, for safety reasons especially concerning mounting the code number shall be equal to the nominal rim diameter expressed in an integral number of millimetres, i.e. co
30、mprising 3 or 4 digits. BS ISO 7867-1:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:17:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3 Table 1 Nominal rim diameter code Nominal rim diameter code a Nominal rim diameter, Dr mm 4 101 6 152 8 203 (9) 229 10 254 12 305 (13) 330 14 356 (1
31、5) 381 16 406 (17) 432 18 457 (19) 483 20 508 22 559 24 610 25 635 26 660 28 711 30 762 32 813 34 864 36 914 38 965 40 1 016 42 1 067 44 1 118 46 1 168 48 1 219 50 1 270 52 1 321 54 1 372 a Values in parentheses are not recommended. BS ISO 7867-1:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun
32、Nov 26 14:17:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 Table 2 Rim width code Rim width code Measuring rim width, Rm mm 2.50 63,5 3.00 76,2 3.50 88,9 4.00 101,6 4.50 114,3 5.00 127 5.50 139,7 6.00 152,4 7.00 177,8 8.00 203,2 9.00 228,6 10.00 254 11.00 279,4 12.00 304,8 13.00 330,2 14.00 355,6
33、15.00 381 16.00 406,4 18.00 457,2 20.00 508 21.00 533,4 23.00 584,2 25.00 635 27.00 685,8 28.00 711,2 31.00 787,4 36.00 914,4 44.00 1 117,6 4.2.6 Rim width code For tyres mounted on 5 tapered rims, the rim width shall be expressed by a code, as given in Table 2. For tyres requiring new-concept rims,
34、 other code numbers will be established. 4.3 Service description The service description shall be indicated as follows: load index speed symbol The characteristics are specified and explained in ISO 7867-2. 4.4 Other service characteristics 4.4.1 In the case of tubeless tyres, the marking “TUBELESS”
35、 shall be shown on the tyre. 4.4.2 In the case of a preferred direction of rotation of the tyre, an arrow shall be used to indicate that direction. 4.4.3 Specific indications, if required, may be added to indicate other characteristics. BS ISO 7867-1:2005 Licensed Copy: sheffieldun sheffieldun, na,
36、Sun Nov 26 14:17:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 5 4.5 Tyre classification and nomenclature (optional) A tyre classification code use of which is optional may be used to describe the primary field of application for the tyre. NOTE Nomenclature and a classification code are under study.
37、 5 Marking Tyres meeting the size and construction requirements and service description of this part of ISO 7867 shall be marked on the sidewall as shown in the example below. EXAMPLE A tyre having a) size and construction characteristics of nominal section width 480 mm, nominal aspect ratio 70, rad
38、ial construction (symbol R), nominal rim diameter code 38; b) service description of basic load 2 900 kg (load index 145), reference speed 40 km/h (speed symbol A8). The above tyre will be marked 480/70 R 38 145A8 In addition, other service characteristics, such as tubeless will be marked: TUBELESS
39、6 Tyre dimensions 6.1 Calculation of “design tyre” dimensions 6.1.1 Theoretical rim width, Rth The theoretical rim width Rth is equal to the product of the nominal section width SN and the rim/section ratio K1: th1N RKS= For factor K1, see Table 3. BS ISO 7867-1:2005 Licensed Copy: sheffieldun sheff
40、ieldun, na, Sun Nov 26 14:17:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6 6.1.2 Measuring rim width, Rm The measuring rim width Rm is the width of the standardized rim nearest to the theoretical rim width Rth (see Table 2 and Annex A). 6.1.3 Design tyre section width, S The design tyre section wi
41、dth S is a nominal section width SN, transferred from the theoretical rim width Rth to the measuring rim width Rm: N2mth ()SSKRR=+ Round to the nearest whole number. For factor K2, see Table 3. 6.1.4 Design tyre section height, H The design tyre section height H is equal to the product of the nomina
42、l section width SN and the nominal aspect ratio /H Sdivided by 100: N / 100 H S HS= 6.1.5 Design tyre overall diameter, Do The design tyre overall diameter Do is equal to the nominal rim diameter Dr plus twice the tyre section height H: or 2DDH=+ For those tyres using a rim diameter code comprising
43、1 or 2 digits, see Table 1 for the value of Dr, in millimetres, to be used. 6.2 Calculation of “minimum overall tyre dimensions” 6.2.1 Minimum overall width, Wmin The minimum overall width Wmin is equal to the product of the design tyre section width S and the appropriate coefficient c (see Table 3)
44、: min WS c= 6.2.2 Minimum overall diameter, Do,min The minimum overall diameter Do,min is equal to the nominal rim diameter Dr plus twice the product of design tyre section height H and the appropriate coefficient d (see Table 3): o,minr 2DDH d=+ 6.3 Calculations of “maximum overall tyre dimensions
45、in service” 6.3.1 General These calculations are for use by vehicle manufacturers in designing for tyre clearance. BS ISO 7867-1:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:17:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 7 6.3.2 Maximum overall width in service, Wmax The maximum
46、overall width in service Wmax is equal to the product of the design tyre section width S and the appropriate coefficient a (see Table 3): max WS a= It includes protective ribs, lettering, embellishments, manufacturing tolerances and growth due to service. 6.3.3 Maximum overall diameter in service, D
47、o,max The maximum overall diameter in service Do,max is equal to the nominal rim diameter Dr plus twice the product of the design tyre section height H and the appropriate coefficient b (see Table 3): o,maxr 2DDH b=+ It includes manufacturing tolerances, the different types of tread patterns (see fo
48、otnote to Table 3) and growth due to service. 6.4 Coefficients for calculation of tyre dimensions For all types of tyres (for tractor drive, tractor steer, implement and garden tractor wheels) of all structures (bias-belted, diagonal/bias and radial construction) with nominal aspect ratio /50H SW mo
49、unted on 5 tapered rims, the coefficients for the calculation of tyre dimensions shall be as given in Table 3. For tyres with ratio /50H S and/or different-concept tyres and rims, other coefficients will be defined. Table 3 Coefficients for calculation of tyre dimensions Coefficients Structure Tyre construction code K1 K2 a ba c d Bias-belted B Diagonal/bi as D 1,08 1,07 Radial R 0,8 0,4 1,05 1,04 0,96 0,97 a Values are based on regular service