1、 ASABE/ISO 12003-2:2008 SEP2017 Agricultural and forestry tractors Roll-over protective structures on narrow-track wheeled tractors Part 2: Rear-mounted ROPS American Society of Agricultural and Biological Engineers ASABE is a professional and technical organization, of members worldwide, who are de
2、dicated to advancement of engineering applicable to agricultural, food, and biological systems. ASABE Standards are consensus documents developed and adopted by the American Society of Agricultural and Biological Engineers to meet standardization needs within the scope of the Society; principally ag
3、ricultural field equipment, farmstead equipment, structures, soil and water resource management, turf and landscape equipment, forest engineering, food and process engineering, electric power applications, plant and animal environment, and waste management. NOTE: ASABE Standards, Engineering Practic
4、es, and Data are informational and advisory only. Their use by anyone engaged in industry or trade is entirely voluntary. The ASABE assumes no responsibility for results attributable to the application of ASABE Standards, Engineering Practices, and Data. Conformity does not ensure compliance with ap
5、plicable ordinances, laws and regulations. Prospective users are responsible for protecting themselves against liability for infringement of patents. ASABE Standards, Engineering Practices, and Data initially approved prior to the society name change in July of 2005 are designated as “ASAE“, regardl
6、ess of the revision approval date. Newly developed Standards, Engineering Practices and Data approved after July of 2005 are designated as “ASABE“. Standards designated as “ANSI“ are American National Standards as are all ISO adoptions published by ASABE. Adoption as an American National Standard re
7、quires verification by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by ASABE. Consensus is established when, in the judgment of the ANSI Board of Standards Review, substantial agreement has been reached by directly and materially affected inter
8、ests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made toward their resolution. CAUTION NOTICE: ASABE and ANSI standards may be revised or withdrawn at any
9、time. Additionally, procedures of ASABE require that action be taken periodically to reaffirm, revise, or withdraw each standard. Copyright American Society of Agricultural and Biological Engineers. All rights reserved. ASABE, 2950 Niles Road, St. Joseph, Ml 49085-9659, USA, phone 269-429-0300, fax
10、269-429-3852, hqasabe.org S T A N D A R D ASABE/ISO 12003-2:2008 SEP2017 Copyright American Society of Agricultural and Biological Engineers 1 ASABE/ISO 12003-2:2008 SEP2017 Approved September 2017 as an American National Standard Agricultural and forestry tractors Roll-over protective structures on
11、 narrow-track wheeled tractors Part 2: Rear-mounted ROPS These materials are subject to copyright claims of ISO and ASABE. No part of this publication may be reproduced in any form, including an electronic retrieval system, without the prior written permission of ASABE. All requests pertaining to AS
12、ABE/ISO 12003-2:2008 SEP2017 standard should be submitted to ASABE. This standard was reviewed and approved for adoption by the ASABE Machinery System Agricultural Machinery Common Tests subcommittee. Approved as an ASABE standard and approved by ANSI September 2017. Keywords: Roll-over, ROPS, Safet
13、y, Test procedure, Tractor 0 Foreword 0.1 ASABE/ISO 12003-2:2008 SEP2017, Agricultural and forestry tractors Roll-over protective structures on narrow-track wheeled tractors Part 2: Rear-mounted ROPS, is an adoption without modification of the identically titled ISO standard ISO 12003-1:2008, Agricu
14、ltural and forestry tractors Roll-over protective structures on narrow-track wheeled tractors Part 2: Rear-mounted ROPS. 0.2 ASABE/ISO 12003-2:2008 SEP2017 specifies procedures for both the static and dynamic testing of roll-over protective structures (ROPS) rear-mounted on narrow-track wheeled agri
15、cultural and forestry tractors. It defines the clearance zone and acceptance conditions for rigid or tiltable, rear, two-post roll bar, frame and cab ROPS, and is applicable to tractors so equipped having the following characteristics. A ground clearance of not more than 600 mm beneath the lowest po
16、ints of the front- and rear-axle housings (not considering lower points on the axle differential). A fixed or adjustable minimum track width of one of the two axles of less than 1 150 mm when fitted with the widest specified tyres, and with the overall width of the other axle being less than that of
17、 the first axle. A mass greater than 600 kg but less than 3 000 kg, unladen, including the ROPS and tyres of the largest size recommended by the manufacturer. 0.3 Six normative references are listed in ISO 12003-2:2008. These references have been reviewed and accepted as part of the adoption of the
18、ISO document in ASABE adoption number. 0.4 This standard has been approved as an American National standard by ANSI (American National Standard Institute). 0.5 Product labelled to reference ISO 12003-2 shall be deemed compliant to ASABE/ISO 12003-2. Text of ISO 12003-2:2008, Agricultural and forestr
19、y tractors Roll-over protective structures on narrow-track wheeled tractors Part 2: Rear-mounted ROPS, follows. ASABE/ISO 12003-2:2008 SEP2017 Copyright American Society of Agricultural and Biological Engineers 2 1 Scope This part of ISO 12003 specifies procedures for both the static and dynamic tes
20、ting of roll-over protective structures (ROPS) rear-mounted on narrow-track wheeled agricultural and forestry tractors. It defines the clearance zone and acceptance conditions for rigid or tiltable, rear, two-post roll bar, frame and cab ROPS, and is applicable to tractors so equipped having the fol
21、lowing characteristics. A ground clearance of not more than 600 mm beneath the lowest points of the front- and rear-axle housings (not considering lower points on the axle differential). A fixed or adjustable minimum track width of one of the two axles of less than 1 150 mm when fitted with the wide
22、st specified tyres, and with the overall width of the other axle being less than that of the first axle. A mass greater than 600 kg but less than 3 000 kg, unladen, including the ROPS and tyres of the largest size recommended by the manufacturer. 2 Normative references The following referenced docum
23、ents 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 (including any amendments) applies. ISO 630, Structural steels Plates, wide flats, bars, sections and profiles ISO
24、898-1:1999, Mechanical properties of fasteners made of carbon steel and alloy steel Part 1: Bolts, screws and studs ISO 898-2:1992, Mechanical properties of fasteners Part 2: Nuts with specified proof load values Coarse thread ISO 2408, Steel wire ropes for general purposes Minimum requirements ISO
25、5353, Earth-moving machinery, and tractors and machinery for agriculture and forestry Seat index point ASTM A370, Standard Test Methods and Definitions for Mechanical Testing of Steel Products 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 r
26、oll-over protective structure ROPS framework protecting drivers of wheeled agricultural and forestry tractors, which minimizes the likelihood of driver injury resulting from accidental overturning during normal field work NOTE: The ROPS is characterized by the provision of space for a clearance zone
27、, either inside the envelope of the structure or within a space bounded by a series of straight lines from the outer edges of the structure to any part of the tractor that might come into contact with the ground; it is capable of supporting the tractor in an overturned position. ASABE/ISO 12003-2:20
28、08 SEP2017 Copyright American Society of Agricultural and Biological Engineers 3 3.2 rear-mounted ROPS two-post, roll-bar-type, roll-over protective structure mounted on the tractor rearwards of the driving seat, or a frame or cab NOTE: Compare with front-mounted ROPS described in ISO 12003-1. 3.3 t
29、ractor mass mass of the unladen tractor in working order with tanks and radiator full, rear-mounted ROPS with cladding, and any track equipment or additional front-wheel drive components required for normal use NOTE: The operator, optional ballast weights, additional wheel equipment, and special equ
30、ipment and tools are not included. 3.4 reference mass mass, not less than the tractor mass, selected by the manufacturer for calculation of the energy inputs to be used in the tests 3.5 horizontal loading test application of a horizontal load to the rear, front and side of the roll-over protective s
31、tructure 3.6 crushing test application of a vertical static load through a beam placed laterally across the uppermost members of the rear-mounted ROPS 3.7 reference plane vertical plane, generally longitudinal to the tractor and passing through the seat index point and the steering-wheel centre NOTE
32、: Normally this reference plane coincides with the longitudinal median plane of the tractor. 3.8 longitudinal median plane longitudinal plane of symmetry zero Y plane vertical plane Y passing through the mid-points of AB, perpendicular to AB, where, for each wheel, the vertical plane passing through
33、 its axis cuts the mid-plane of the wheel following a straight line which meets the supporting surface of the vehicle at one point, and where A and B are two points thus defined which correspond to two wheels, both of which are either steering or powered wheels, situated respectively at the two ends
34、 of the same real or imaginary axle. See Figure 1. NOTE 1: “Mid-plane of the wheel” designates the plane equidistant from the inner edges of the rim. In the case of dual wheels, the straight line is, in this particular case, the intersection of the mid-plane of the dual wheels and the vertical plane
35、 passing through the axis of the axle pin. NOTE 2: Adapted from ISO 612:19781, Clause 5. 3.9 impact test application of a dynamic load produced by a block acting as a pendulum ASABE/ISO 12003-2:2008 SEP2017 Copyright American Society of Agricultural and Biological Engineers 4 3.10 wheelbase horizont
36、al distance between the two vertical planes passing through the rotational centre-lines of the wheels, where one plane is for the front wheels and the other for the rear wheels Figure 1 Longitudinal median plane 4 Symbols See Table 1. Table 1 Symbols Symbol Description Unit ah Half of the horizontal
37、 seat adjustment mm av Half of the vertical seat adjustment mm B Minimum overall width of the tractor mm Bb Maximum outer width of the rear-mounted ROPS mm D Deflection of the ROPS for the calculated basic energy at the point of, and in line with, the load application mm Eil Energy to be absorbed du
38、ring longitudinal loading J Eis Energy to be absorbed during side loading J F Static load force N Fmax Maximum static load force occurring during loading, with the exception of overload N Fv Vertical crushing force N H Falling height of the pendulum block mm Ir Moment of inertia about rear axle, wha
39、tever the mass of the rear wheels may be kgm2 L Tractor reference wheelbase mm m Tractor mass (see 3.5) kg mt Reference mass (see 3.4) kg W Overall width of the upper part of the protective structure mm ASABE/ISO 12003-2:2008 SEP2017 Copyright American Society of Agricultural and Biological Engineer
40、s 5 5 Test apparatus and equipment 5.1 Apparatus for both dynamic and static testing 5.1.1 Clearance zone framework Means to prove that the clearance zone has not been entered during the test: a measuring rig complying with Figures 10 and 11 can be used. 5.1.2 Apparatus for crushing tests The crushi
41、ng tests shall be carried out by means of the elements described in 5.1.2.1 and 5.1.2.2. 5.1.2.1 Means to apply downward force on the protective structure, such as that shown in Figure 2, including a stiff beam with a width of 250 mm. 5.1.2.2 Equipment to measure total vertical force applied. Key 1
42、universal pin joints 2 hydraulic cylinder 3 supports 4 crushing beam a direction of force Figure 2 Crushing test Example 5.2 Apparatus for dynamic testing 5.2.1 Device to strike a blow against the protective structure A pendulum block with mass of 2 000 kg. The pendulum block mass does not include t
43、he mass of the chains. The maximum chain mass shall be 100 kg. The dimensions of the block, which shall be suspended from two chains from pivot points 6 m or more above ground level, shall be as shown in Figure 3. The pendulum block centre of gravity shall coincide with its geometric centre. ASABE/I
44、SO 12003-2:2008 SEP2017 Copyright American Society of Agricultural and Biological Engineers 6 Key 1 attachment for release mechanism 2 height adjustment 3 impact face 4 hooks to hold spare chain 5 pendulum chains a axis of centre of gravity Dimensions in millimetresFigure 3 Illustration of pendulum
45、block 5.2.2 Pendulum supports The pendulum pivot points shall be rigidly fixed such that their displacement in any direction does not exceed 1% of the height of fall. 5.2.3 Means to lash the tractor to the ground The tractor shall be lashed, by means of steel wire ropes incorporating tensioning devi
46、ces, to ground rails preferably spaced approximately 600 mm apart throughout the area immediately below the pivot points and extending for approximately 9 m along the pendulum block axis and approximately 1 800 mm to either side. The points of attachment of the lashings shall be approximately 2 000
47、mm behind the rear axle and 1 500 mm in front of the front axle. There shall be two lashings on each axle, one on each side of the median plane of the tractor. The lashings shall be steel cable of 12,5 mm to 15 mm diameter, tensile strength 1 100 MPa to 1 260 MPa, meeting the requirements of ISO 240
48、8. Details of the lashing means are given in Figures 4, 5, and 6. The front and rear wheels are not required to be in line if this is more convenient for attaching appropriate ropes. 5.2.4 Softwood beam A softwood beam, of cross-section 150 mm 150 mm, to restrain the rear wheels when striking from t
49、he front or rear, and to clamp against the side of the front and rear wheels when striking from the side, as shown in Figures 4, 5, and 6. ASABE/ISO 12003-2:2008 SEP2017 Copyright American Society of Agricultural and Biological Engineers 7 Dimensions in millimetres Key 1 positioning tie 2 150 mm square softwood beam clamped behind both rear wheels after anchoring 3 travel arc of pendulum block centre of gravity passing through contact point Figure 4 Example of
