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1、BRITISH STANDARD BS 5861:1992 ISO 500:1991 Specification for Rear-mounted power take-offs on agricultural tractors Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:41:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5861:1992 This British Standard, having been prepared under the direction o
2、f the Agricultural Machinery and Implements Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 28 February 1992 BSI 03-2000 First published April 1980 Second edition February 1992 The following BSI references relate to the work on this stand
3、ard: Committee reference AGE/6 Draft for comment 89/79877 DC ISBN 0 580 20556 8 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Agricultural Machinery and Implements Standards Policy Committee (AGE/-) to Technical Committee AGE/6, upon w
4、hich the following bodies were represented: AFRC Institute of Engineering Research Agricultural and Allied Workers National Trade Group Agricultural Engineers Association British Agricultural and Garden Machinery Association Ltd. County Surveyors Society Department of Trade and Industry (Vehicle Div
5、ision) Forestry Commission Health and Safety Executive Home Timber Merchants Association of Scotland Local Authority Organizations Ministry of Agriculture Fisheries and Food National Farmers Union Society of Motor Manufacturers and Traders Limited Amendments issued since publication Amd. No.DateComm
6、ents Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:41:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5861:1992 BSI 03-2000i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Normative references1 3Types of power take-off1 4Requirements and specificatio
7、ns1 Annex A (normative) Alternative clearance zone around PTO10 Figure 1 PTO, type 12 Figure 2 PTO, type 23 Figure 3 PTO, type 35 Figure 4 Location of PTO6 Figure 5 Clearance zone around PTO7 Figure 6 Master shield of PTO8 Figure A.1 Clearance zone around PTO10 Table 1 Characteristics of PTO types1
8、Table 2 PTO, type 1, tolerances for splines2 Table 3 PTO, type 2, tolerances and change factors for splines4 Table 4 PTO, type 3, tolerances and change factors for splines6 Table 5 Location of PTO6 Table 6 Dimensions of clearance zone8 Table 7 Dimensions of PTO master shield9 Publication(s) referred
9、 toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:41:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5861:1992 ii BSI 03-2000 National foreword The revision of this British Standard has been prepared under the direction of the Agricultural Machinery and Implements Stand
10、ards Policy Committee and is identical with ISO 500:1991 “Agricultural tractors Rear-mounted power take-off Types 1, 2 and 3” prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and forestry, of the International Organization for Standardization (ISO). This second editi
11、on supersedes BS 5861:1980, which is withdrawn. Technical Committee AGE/6 has reviewed the provisions of ISO 4254-1:1989 and ISO 6489-2:1980, to which reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. ISO 6489-3 is to be published. A B
12、ritish Standard does not purport to include all the 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. Cross-references International StandardCorre
13、sponding British Standard ISO 4156:1981BS 6186 Specification for involute splines: metric module, side fit Part 1:1981 Dimensions and tolerances (Identical) ISO 6489:1980BS 6108:1981 Specification for dimensions of hook-type couplings on agricultural towing vehicles (Identical) ISO 6508:1986BS 891:1
14、989 Methods for hardness test (Rockwell method) and for verification of hardness testing machines (Rockwell method) (Technically equivalent) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 10, an inside back cover and a back cover. This stand
15、ard 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. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:41:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5861:1992 BSI 03-20001 1 Scope Th
16、is International Standard specifies requirements for types 1, 2 and 3 rear-mounted power take-offs (PTO), the clearance zones around them and protection of the power take-off on agricultural tractors. 2 Normative references The following standards contain provisions which, through reference in this
17、text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent e
18、ditions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 4156:1981, Straight cylindrical involute splines Metric module, side fit Generalities, dimensions and inspection. ISO 4254-1:1989, Tractors and machinery for agricultur
19、e and forestry Technical means for ensuring safety Part 1: General. ISO 6489-1:1980, Agricultural vehicles Mechanical connections on towing vehicles Part 1: Hook type Dimensions. ISO 6489-2:1980, Agricultural vehicles Mechanical connections on towing vehicles Part 2: Clevis type Dimensions. ISO 6489
20、-3:, Agricultural vehicles Mechanical connections on towing vehicles Part 3: Tractor drawbar1). ISO 6508:1986, Metallic materials Hardness test Rockwell test (scales A B C D E F G H K). 3 Types of power take-off The main characteristics of the three types of PTO shall be as specified in Table 1. 4 R
21、equirements and specifications 4.1 Manufacturing requirements The dimensions of the main PTO on agricultural tractors shall comply with Figure 1, Figure 2 or Figure 3 and Table 2, and Table 3 or Table 4 as appropriate. To facilitate coupling, changes of shape at the end (for example, chamfering of s
22、plines) of the PTO type 1 profile are admissible. The hardened portion of the splines shall have a minimum hardness of 48 HRC when tested in accordance with ISO 6508. 4.2 Direction of rotation The PTO shall rotate clockwise when viewed from behind the tractor. 4.3 Location On tractors with one PTO s
23、haft, the location of the PTO axis shall lie within the shaded rectangle shown in Figure 4. 4.4 Clearance zone The clearance zone around the PTO shall be in accordance with Figure 5 and Table 6. 4.5 Safety related requirements The master shield, as shown in Figure 6 and Table 7, shall be supplied by
24、 the manufacturer and shall be fixed to the tractor. It may also be hinged and/or be able to slide. If the same degree of safety is reached, equivalent protection devices (e.g. towing hook or clevis supports) can be used instead of the master shield. In this case, provision shall be made for anchori
25、ng the PTO drive-shaft guard. Safety requirements given in ISO 4254-1 shall also be met. Table 1 Characteristics of PTO types 1) To be published. PTO type Nominal diameter Number and type of splines PTO rated rotational frequency mmmin1 1356 straight splines540 23521 involute splines1 000 34520 invo
26、lute splines1 000 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:41:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5861:1992 2 BSI 03-2000 Table 2 PTO, type 1, tolerances for splines 1) Form diameter. (For definition see ISO 4156.) 2) With or without tooth relief. 3) Size of chamfer to
27、be chosen by the manufacturer. Figure 1 PTO, type 1 Dimensions in millimetres PTO type 1HubShaft Nominal dimension ls 8,698,69 Test dimension Individually measured 8,74 8,71 Individually measured 8,60 8,53 “GO” plug gauge8,69 min.“GO” ring gauge8,64 max. Licensed Copy: sheffieldun sheffieldun, na, M
28、on Dec 04 14:41:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5861:1992 BSI 03-20003 1) Size of chamfer to be chosen by the manufacturer. 2) Form diameter. 3) Only for tooth-based engaging system. Figure 2 PTO, type 2 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:41:22 GMT+00:00 2006,
29、 Uncontrolled Copy, (c) BSI BS 5861:1992 4 BSI 03-2000 Table 3 PTO, type 2, tolerances and change factors for splines Dimensions in millimetres PTO type 2HubShaft Nominal dimension ls 2,4942,494 Test dimension Individually measured 2,565 2,520 Individually measured 2,369 2,306 With appropriate “GO”
30、plug gauge 2,494 min. With appropriate “GO” ring gauge 2,406 max. Nominal dimension Dimension between pins, MiDimension over pins, Ma 29,24039,182 Change factora1,9361,473 Test dimension 29,38 29,29 39,00 38,90 a Change factors are taken from ANSI B92 1, Involute splines and inspection. Licensed Cop
31、y: sheffieldun sheffieldun, na, Mon Dec 04 14:41:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5861:1992 BSI 03-20005 1) Size of chamfer to be chosen by the manufacturer. 2) Form diameter. 3) Only for tooth-based engaging system. Figure 3 PTO, type 3 Licensed Copy: sheffieldun sheffieldun, na, Mo
32、n Dec 04 14:41:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5861:1992 6 BSI 03-2000 Table 4 PTO, type 3, tolerances and change factors for splines Table 5 Location of PTO Dimensions in millimetres PTO type 3HubShaft Nominal dimension ls 3,3253,325 Test dimension Individually measured 3,396 3,351
33、 Individually measured 3,200 3,137 With appropriate “GO” plug gauge 3,325 min. With appropriate “GO” ring gauge 3,237 max. Nominal dimension Dimension between pins, MiDimension over pins, Ma 36,70448,432 Change factor2,0161,544 Test dimension 36,85 36,75 48,239 48,142 Figure 4 Location of PTO Dimens
34、ions in millimetres PTO type ha min.max. 1450b675 2550775 3650875 a For purposes of compatibility, it is recommended that the upper region of the location area be used. b May be reduced to 350 mm on tractors with a minimum track setting of 1 150 mm or less. Licensed Copy: sheffieldun sheffieldun, na
35、, Mon Dec 04 14:41:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5861:1992 BSI 03-20007 1) May be restricted by movable and/or detachable devices. The clearance zone for towed implements shall be in accordance with ISO 6489. Figure 5 Clearance zone around PTO Licensed Copy: sheffieldun sheffieldu
36、n, na, Mon Dec 04 14:41:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5861:1992 8 BSI 03-2000 Table 6 Dimensions of clearance zone Dimensions in millimetres PTO type abcgir! min.max.max.min.min.max.min. 1 768060240a280a7655 2 389100652902958951 a On tractors with a minimum track setting of 1 150
37、mm or less and/or tractors equipped with special hitch devices, for PTO types 1 and 2, dimensions g and i may be reduced to 210 mm. NOTEThe shape of the shield may differ where not defined, provided it gives equivalent protection and does not infringe upon the clearance zone. Figure 6 Master shield
38、of PTO Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:41:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5861:1992 BSI 03-20009 Table 7 Dimensions of PTO master shield Dimensions in millimetres PTO type kma,bnpa,br min. 5 5 5max. 1 701258528576 2 38015010035589 a On tractors with two rea
39、r PTO shafts, the dimensions m and/or p may need adjustment to maintain equivalent clearances between shaft and shield. b On tractors with a minimum track setting of 1 150 mm or less and/or tractors equipped with special hitch devices, for PTO types 1 and 2, dimension m may be reduced to 110 mm and
40、dimension p to 215 mm. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:41:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5861:1992 10 BSI 03-2000 Annex A (normative) Alternative clearance zone around PTO For a transition period, the clearance zone around the PTO shown in Figure A.1 (ex-F
41、igure 5 from ISO 500:1979) is acceptable. Figure A.1 Clearance zone around PTO Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:41:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5861:1992 BSI 03-2000 Publication(s) referred to See national foreword. Licensed Copy: sheffieldun sheffieldun,
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