1、DEUTSCHE NORM October 1999 I DIN equipment - Agricultural wheeled tractors - Front-mounted I IS0 8759-1 Part 1 : Power takeloff and three-point linkage (IS0 8759-1 : 1998) ICs 65.060.1 O Landwirtschaftliche Traktoren - Frontanbau - Teil 1 : Zapfwelle und Dreipunktanbau (IS0 8759-1 : 1998) Supersedes
2、 DIN 9612-1, September 1989 edition, and DIN 9612-2, May 1989 edition. This standard incorporates International Standard IS0 8759-1 Agricultural wheeled tractors - Front-mounted equipment - Part 1 : Power take-off and three- point linkage. National foreword This standard has been prepared by ISO/TC
3、23. The responsible German body involved in its preparation was the Normenausschu Maschinenbau (Me- chanical Engineering Standards Committee). DIN 961 1 is the standard corresponding to International Standard IS0 500 referred to in clause 2 of the IS0 Standard. Amendments DIN 961 2-1, September 1989
4、 edition, and DIN 961 2-2, May 1989 edition, have been superseded by the specifications of DIN IS0 8759-1. Previous editions DIN 961 2-1 : 1989-09: DIN 9612-2: 1989-05. National Annex NA Standard referred to (and not included in Normative references) DIN 961 1 Rear-mounted power take-off for agricul
5、tural tractors (modified version of IS0 500 : 1991) IS0 Standard comprises 6 pages. No pari of this standard may be reproduced without the prior permission of Y Deutsches Institut fr Normung e. V., Berlin. wth Verlag GmbH, D-10772 Berlin, has the exclusive right of sale for German Standards (DIN-Nor
6、men). Ref. No. DIN IS0 8759-1 : 1999-1 English price group 05 Sales No. 0405 03.00 COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesCOPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesPage 1 IS0 8759-1 :
7、 1998 Agricu Itural wheeled tractors - Front-mou nted equipment Part 1 : Power take-off and three-point linkage Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards
8、is normally carried out through IS0 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 organizations, governmental and non-governmental, in liaison with ISO, also take pa
9、rt in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Stan
10、dard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 8759-1 was prepared by Technical Committee ISOTTC 23, Tractors and machineV for agriculture and forestry, Subcommittee SC 4, Tractors. This second edition cancels and replaces the first edition (I
11、S0 8759-1:1985), as well as IS0 8759-2:1985, of which it constitutes a technical revision. IS0 8759 consists of the following parts, under the general title Agricultural wheeled tractors - Front-mounted equipment: - Part 7: Power take-off and three-point linkage - Part 2: Stationas/ equipment connec
12、tion COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesPage 2 IS0 8759-1 : 1998 1 Scope This part of IS0 8759 specifies dimensions and requirements for power take-off and for three-point linkages in association with a power lift for the attachment of
13、implements or equipment to the front of agricultural wheeled tractors. It is not applicable to tractors which are designed to run in two directions, where either end can be considered to be the front or the rear; in this case IS0 500 and IS0 730-1 apply. 2 Normative references The following standard
14、s contain provisions which, through reference in this text, constitute provisions of this pari of IS0 8759. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of IS0 8759 are encouraged to investigate the
15、 possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 500:l 991, Agricultural tractors - ear-momfed power fake-off - Types 1, 2 and 3. IS0 730-1:1994, Agricultural wheeled tractors
16、 - ear-mounted three-poinf (inkage - Part 1: Categories 1, 2, 3 and 4. 3 Definitions For the purposes of this pari of IS0 8759, the following definition and those given in IS0 730-1 :1994 apply, except for definitions 3.2.25T) and 3.2.26) which concern convergence and are not applicable to front-mou
17、nted linkages. Additionally, pitch (3.2.21) is considered positive when clockwise as viewed from the left-hand side of the tractor. 3.1 front of the tractor leading end of the machine when moving in the normally accepted direction of travel on the road, as characterised by the relative positions of
18、the seat, steering wheel, controls and road lighting equipment 4 Power take-off (PTO) 4.1 Type, rotational frequency and direction of rotation The power take-off (PTO) shall conform to IS0 500. It shall be either of fype 2 (0 35 mm, 21 splines) or type 3 (0 45 mm, 20 splines. These references concer
19、n IS0 730-1:1994. COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesPage 3 IS0 8759-1 : 1998 The rated rotational frequency shall be 1 O00 min- and rotation shall be in the clockwise direction when viewed from the front of the tractor. The direction o
20、f rotation shall be indicated by an arrow. NOTE - If in special cases a power take off of type 1 (0 35 mm, 6 splines) is provided, the rated rotational frequency is then be 540 min-l or 1 O00 min- and rotation is in the anti-clockwise direction when viewed from the front of the tractor. 4.2 Location
21、 The location of the axis of the power take-off shall lie within the shaded rectangle shown in figure 1 Dimensions in millimetres - l i Figure 1 - Location of power take-off (viewed from the front of the tractor) 4.3 Clearance zone around PTO The clearance zone around the power take-off shall be in
22、accordance with figure 2 and table 1. The dimensions g and i may be transposed. COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesPage 4 IS0 8759-1 : 1998 PTO type 1 2 3 I- I I II I c1 o R I I min. max. min. min. max. 76 48 1 240 200 1) 76 240 200 1)
23、76 89 1 O0 290 295 89 76 48 11 t Figure 2 - Clearance zone Table 1 - Dimensions of the clearance zone Dimensions in millimetres COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesPage 5 IS0 8759-1 : 1998 I I I I I I I I 51) On tractors with a minimum t
24、rack setting of 1150 rnm OF less, dimensions may be reduced to n = 40 mm, 111 = 109 mm, p = 175 mm. 4.4 Protection of PTO A protective device in accordance with figure 3 and table 2 shall be supplied by the manufacturer and shall be fixed at the tractor, unless an equivalent protective device ensure
25、s the same degree of protection. Two options are specified; the first provides minimum protection and the second maximum protection. If the protective device is not designed to be used as a step, it may be flexible. Provision shall be made for anchoring the power take-off drive shaft guard. Fully cl
26、osed protective devices may be used. P i Figure 3 - Protective device 4.5 Operation of controts The rated rotational frequency of the PTO shatl be indicated at the level of the drivers work ptace or at the level of the ctxifrol itself. Unintentional engagement shall be avoided. If more than one rota
27、tional frequency is provided, unintentional change-over to a higher frequency shalt be avoided. COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesPage 6 IS0 8759-1 : 1998 5 Three-point linkage The dimensions specified in IS0 730-1 : 1994, clauses 4.1
28、and 5.1, apply with the exception of the following: a) hitch points (IS0 730-1:1994, subclause 4.1.1): the dimensions of the hitch points shall be in accordance with those indicated for categories 2 and 3; b) upper link point arrangements (IS0 730-1 :1994, subclause 4.1.2): the arrangement of an upp
29、er link point shall allow an inclination of the mast between -3“ to + 3“ from the vertical and a transport pitch of 8“ to 12“ where both are related to the vertical mast position; c) torsional free float and levelling adjustment (IS0 730-1:1994, subclause 4.1.3 and 4.1.4): these provisions are not r
30、equired for a front-mounted linkage; transport height (IS0 730-1:1994, table 3): the minimim transport height shall be 850 mm for category 2 and 965 mm for category 3; d) e) lower hitch point clearance (IS0 730-1:1994, table 3): in order to allow oscillation to the front axle and turning of the front tyre, the lower hitch point clearance shall be at least 250 mm relative to the straight ahead position of the front tyres. COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling Services
