ISO 12003-2:2021 Tractors for agriculture and forestry — Roll-over protective structures on narrow tractors —Part 2: Rear-mounted ROPS

标准简介

Tractors for agriculture and forestry — Roll-over protective structures on narrow tractors —Part 2: Rear-mounted ROPS由国际标准化组织(International Organization for Standardization，简称ISO)于2021-06发布，适用于全球范围。

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INTERNATIONAL STANDARD ISO 12003-2:2021(E)

Tractors for agriculture and forestry — Roll-over protective structures on narrow tractors —

Part 2: Rear-mounted ROPS

1 Scope

This document specifies procedures for both the static and dynamic strength testing of roll-over protective structures (ROPS) rear-mounted on narrow 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 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 and with the overall width of the other axle being less than that of the first axle, including where the two axles are fitted with rims and tyres of the same size;

— a fixed driving position and a mass greater than 400 kg, unballasted, including the ROPS and tyres of the largest size recommended by the manufacturer;

— a reversible driving position (reversible seat and steering wheel), with a mass greater than 400 kg, unballasted, including the ROPS and tyres of the largest size recommended by the manufacturer and maximum unballasted mass less than 3 500 kg and maximum permissible mass less than 5 250 kg;

— a mass ratio less than 1,75;

— a ROPS of the rollbar, frame or cab type, mounted partly or entirely behind the seat index point and having a zone of clearance whose upper limit is (810 + a ) mm above the seat index point in order to v

provide a sufficiently large area or unobstructed space for the protection of the driver.

This document also specifies optional testing procedures for both seat anchorage points and folding efforts of rear-mounted ROPS designed to fold.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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 630-1, Structural steels — Part 1: General technical delivery conditions for hot-rolled products

ISO 630-2, Structural steels — Part 2: Technical delivery conditions for structural steels for general purposes

ISO 630-3, Structural steels — Part 3: Technical delivery conditions for fine-grain structural steels

ISO 630-4, Structural steels — Part 4: Technical delivery conditions for high yield strength quenched and tempered structural steel plates and wide flats

ISO 2408, Steel wire ropes — Requirements

ISO 12003-2:2021(E)

ISO 5353, Earth-moving machinery, and tractors and machinery for agriculture and forestry — Seat index point

ISO 13854:2017, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body

ISO 12003-1:2021, Tractors for agriculture and forestry — Roll-over protective structures on narrow tractors — Part 1: Front-mounted ROPS

ISO 12934, Tractors and machinery for agriculture and forestry — Basic types — Vocabulary

ISO 80000-1, Quantities and units — Part 1: General

ASTM A370, Standard Test Methods and Definitions for Mechanical Testing of Steel Products

3 Terms a nd definiti ons

For the purposes of this document, the terms and definitions given in ISO 12934 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp

— IEC Electropedia: available at https:// www .electropedia .org/ 3.1

roll-over protective structure

ROPS

framework protecting drivers of agricultural tractors (3.15), which minimizes the likelihood of driver injury resulting from accidental overturning during normal field work

Note 1 to entry: The ROPS is characterized by the provision of space for a clearance zone, 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.

3.2

rear-mounted ROPS

two-post, roll-bar-type, roll-over protective structure (3.1) mounted on the tractor rearwards of the driving seat, or a frame or cab

Note 1 to entry: Compare with front-mounted ROPS described in ISO 12003-1.

3.3

unballasted mass

mass of the tractor in working order with tanks and radiators full, roll-over protective structure (3.1) with cladding and any track equipment or additional front-wheel drive components required for normal use

Note 1 to entry: Not included are the operator, optional ballast weights, additional wheel equipment, special equipment and loads.

[SOURCE: ISO 5700:2013, 3.2]

3.4

maximum permissible mass

m

max

maximum mass of the tractor stated by the manufacturer to be technically permissible and declared on the vehicle’s identification plate and/or in the operator’s handbook

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