1、BRITISH STANDARD BS ISO 6489-3:2004 Agricultural vehicles Mechanical connections between towed and towing vehicles Part 3: Tractor drawbar ICS 65.060.10 BS ISO 6489-3:2004 This British Standard was published under the authority of the Standards Policy and S t r a t e g y C o m m i t t e e o n 11 Jun
2、e 2004 BSI 11 June 2004 ISBN 0 580 43924 0 National foreword This British Standard reproduces verbatim ISO 6289-3:2004 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee AGE/6, Agricultural tractors and forestry machinery, whic
3、h has the responsibility to: A list of organizations represented on this committee can be obtained on request to its 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
4、“International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue 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 wit
5、h a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related internat
6、ional and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to iv, pages 1 to 7 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last is
7、sued. Amendments issued since publication Amd. No. Date CommentsINTERNATIONAL STANDARD ISO 6489-3 Second edition 2004-06-01 Reference number ISO 6489-3:2004(E) Agricultural vehicles Mechanical connections between towed and towing vehicles Part 3: Tractor drawbar Vhicules agricoles Liaisons mcaniques
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13、93:2004 iii Contents Page 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Specifications 2 4.1 Drawbar clevis . 2 4.2 Drawbar hitch point . 2 4.3 Drawbar categories . 2 4.4 Drawbar location and position . 3 4.5 Drawbar dimensions . 4 5 Vertical drawbar load . 5 6 PTO drive shaft clear
14、ance . 5 Bibliography . 7 BSISO64893:2004iv 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. Each membe
15、r 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 International Elec
16、trotechnical 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 Standards adopt
17、ed 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 of paten
18、t rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 6489-3 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and forestry, Subcommittee SC 4, Tr a c t o r s. This second edition cancels and replaces the first edition (ISO
19、 6489-3:1992), which has been technically revised. ISO 6489 consists of the following parts, under the general title Agricultural vehicles Mechanical connections between towed and towing vehicles: Part 1: Dimensions of hitch-hooks Part 2: Specifications for clevis coupling 40 Part 3: Tractor drawbar
20、 Part 4: Dimensions of piton-type coupling BSISO64893:2004ANRETNIITOTS LANDNADRA OSI -98464002:3)E(1 Agricultural vehicles Mechanical connections between towed and towing vehicles Part 3: Tractor drawbar 1S c o p e This part of ISO 6489 specifies the dimensional requirements and location for categor
21、y 0, 1, 2, 3, 4 and 5 drawbars mounted on the rear of agricultural tractors. 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 refer
22、enced document (including any amendments) applies. ISO 500-1, Agricultural tractors Rear-mounted power take-off types 1, 2 and 3 Part1: General specifications, safety requirements, dimensions for master shield and clearance zone ISO 789-1, Agricultural tractors Test procedures Part 1: Power tests fo
23、r power take-off ISO 5673-2, Agricultural tractors and machinery Power take-off drive shafts and power-input connection Part 2: Specification for use of PTO drive shafts, and position and clearance of PTO drive line and PIC for different attachments 1) ISO 14396, Reciprocating internal combustion en
24、gines Determination and method for the measurement of engine power Additional requirements for exhaust emission tests in accordance with ISO 8178 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 tractor drawbar drawbar mechanical connection mo
25、unted on the rear of an agricultural tractor for the mechanical coupling of an implement NOTE A tractor drawbar can be regular non-adjustable or adjustable. 3.1.1 regular non-adjustable drawbar fixed drawbar with no possibility for adjustment 3.1.2 adjustable drawbar adjustable, multiple operating p
26、osition drawbar providing the regular, short and extended drawbar positions 1) Under preparation. BSISO64893:20042 3.1.2.1 regular drawbar position operating position of the adjustable drawbar providing the standard dimension from drawbar pin hole to end of PTO for the type of PTO on the tractor 3.1
27、.2.2 short drawbar position position of the adjustable drawbar intended to connect non-PTO driven equipment that applies a high vertical load to the drawbar 3.1.2.3 extended drawbar position position of the adjustable drawbar intended for a special PTO drive shaft condition where equal angularity of
28、 the drive shaft joints cannot be obtained using the regular drawbar position 3.2 PTO drive shaft clearance plane imaginary plane which establishes the upper permissible limit of protrusion of the drawbar and clevis 3.3 drawbar hitch point connection point beween tractor drawbar and implement end 4
29、Specifications 4.1 Drawbar clevis The drawbar clevis may be removable to allow installation of special attachments or connection to implements which have a clevis end (see Figure 3). It may also be necessary to remove the clevis to provide PTO driveshaft clearance with implements which do not meet t
30、he dimensions specified in ISO 5673-2. 4.2 Drawbar hitch point Provisions shall be made on the tractor for the connection of the tractor drawbar to the implement, in a position with the drawbar hitch point directly in line with the longitudinal centreline of the tractor PTO. 4.3 Drawbar categories S
31、ee Table 1. Table 1 Drawbar categories Values in kilowatts Drawbar category PTO power aat rated engine speed 0 1 2 3 4 5 a Determined in accordance with ISO 789-1 or OECD code 1 or 2. If PTO power is not available, use of engine power as determined using ISO 14396. 28 48 115 185 300 500 86 % BSISO64
32、893:2004 3 4.4 Drawbar location and position The drawbar location and position shall conform to Figure 1 and Tables 2 and 3. Key vertical load NOTE Tables 2 and 3 explain the symbols and give the dimension values. Figure 1 Drawbar location and position Table 2 Drawbar location Values of the dimensio
33、ns and Dimensions in millimetres Dimension Drawbar category 012345 Height of drawbar a , 220 to 420 330 to 500 330 to 500 380 to 560 380 to 560 400 to 600 bmin. 200 220 250 260 280 310 a The dimension should be met for normal agricultural applications. On tractors especially designed for high ground
34、 clearance, such as working in standing vegetable crops or sugar cane, may exceed the maximum. On tractors designed for low ground clearance, such as lawn mowing or ground care, which require a low centre of gravity, may be less than the minimum. b The values given apply to new tractor types designe
35、d after the publication of this part of ISO 6489. F SU S U S S S BSISO64893:20044 4.5 Drawbar dimensions The drawbar dimensions shall conform to Figure 2 and Table 4. Table 3 Drawbar position Values of the dimension Dimensions in millimetres PTO type a Short drawbar position Regular drawbar position
36、 Extended drawbar position 1 and 2 b 3 a See ISO 500-1 for identification of PTO type. b A position may be provided to accommodate older implements which use a type 1 PTO. Dimensions in millimetres Figure 2 Tractor drawbar and clevis T T 10 250 400 550 350 500 650 350 mm BSISO64893:2004 5 5 Vertical
37、 drawbar load The maximum static vertical loads which the implement imposes on the tractor drawbar shall be in accordance with Table 5 for the regular, short and extended drawbar positions. If the configuration of the implement induces high dynamic vertical loads on the drawbar, the static load shou
38、ld be reduced to keep the dynamic load under control. Proper ballasting of the tractor is required to maintain stability when the loads specified in Table 5 are applied to the tractor drawbar. 6 PTO drive shaft clearance The clearance dimensions given for the PTO in this part of ISO 6489 and for the
39、 PIC in ISO 5673-2 provide clearance between the PTO drive shaft and the drawbar clevis. See Figure 3 and Table 6. Clearance is provided when the fore-aft pitch between the implement and tractor is less than for drawbar categories 0, 1, 2, and 3; and is less than for drawbar categories 4 and 5. To p
40、rovide adequate articulation between the tractor and implement, it is recommended the implement end be designed to allow of fore-aft pitch and of side-to-side roll between the tractor and the implement. Table 4 Tractor drawbar and clevis Dimension values Dimensions in millimetres Dimension Drawbar c
41、ategory 012345 Drawbar width, amax. 60 67 90 90 130 160 Drawbar thickness, max. 20 36 52 57 64 80 Pin hole diameter, 20 33 33 41 52,5 72,5 Pin diameter, min. 18 30 30 38 50 70max.304045456580 bmin.140210210210210210 Height, min. 50 70 70 90 90 100 Throat depth, min. 50 70 80 80 90 110 End radius of
42、drawbar and clevis, c max. 35 40 55 55 80 95 c min. a The drawbar pin handle, retention devices, or clevis may extend beyond width , but must not interfere with the implement articulation angles specified in Clause 6. bis the distance over which the specified dimensions and shall be maintained. c Th
43、e profile shown in Figure 2 represents the maximum envelope for the drawbar and clevis. The radius and angle may differ from the values given so long as the maximum envelope is not exceeded. Table 5 Maximum vertical load on the drawbar, Values in kilonewtons Drawbar category Max. static vertical loa
44、d, Short drawbar position Regular drawbar position Extended drawbar position 0753 , 5 11 286 22 21 51 1 32 71 81 3 43 32 21 6 54 53 0 A B C +0,80 0,25 C1 F G H J R W 20 20 20 20 15 15 A GA B RW F F 20 15 20 20 BSISO64893:20046 (For category 4 and 5 drawbars the roll and pitch should be ). The maximu
45、m roll and pitch angles do not need to be met simultaneously. a) clevis removed from the drawbar b) clevis attached to the drawbar Key PTO drive shaft clearance 1 clearance plane NOTE For PTO drive shaft clearance values, see Table 6. Figure 3 PTO drive shaft clearance plane Table 6 PTO drive shaft
46、clearance plane Values of the PTO drive shaft clearance, Dimensions in millimetres Dimension Drawbar category 012345 PTO drive shaft clearance, , min. 100 100 100 110 120 130 15 V V V BSISO64893:2004 7 Bibliography 1 OECD code 1, OECD standard code for the official testing of agricultural and forest
47、ry tractor performance 2 OECD code 2, OECD restricted standard code for the official testing of agricultural and forestry tractor performance BSISO64893:2004BS ISO 6489-3:2004 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible
48、for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments o
49、r editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: +44 (0)20 8996 900
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