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1、INTERNATIONAL STANDARD IS0 730-1 :I994 TECHNICAL CORRIGENDUM 1 Published 1995-06-15 Agricultural wheeled tractors - Rear-mounted three-point linkage - Part 1: Categories 1,2,3 and 4 TECHNICAL CORRIGENDUM I Tracteurs agricoles roues -Attelage trois points mont larrire - Partie I : Catgories I, 2,3 et
2、 4 RECTIFICATIF TECHNIQUE I Technical corrigendum 1 to International Standard IS0 730-1:1994 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and forestry, Su bcommittee SC 4, Tractors. Page 7, table 3 In column Category 2“. for “movement range“ replace 650 max.1
3、)“ with 650 min.1). ICs 65.060.10 Ref. No. IS0 730-1:1994/Cor.l:1995(E) Descriptors: agricultural machinery, agricultural tractors, couplings, specifications, dimensions. 8 IS0 1995 Printed in Switzerland Copyright International Organization for Standardization Provided by IHS under license with ISO
4、 Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 07:18:48 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD IS0 730-1 Third edition 1 994-1 2-1 5 Agricultural wheeled tractors - Rear-mounted three-point linkage - Part 1: Catego
5、ries 1, 2, 3 and 4 Tracteurs agricoles roues - Attelage trois points mont larrire - Partie 1: Catgories I , 2, 3 et 4 Reference number IS0 730-1 :I 994(E) Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 No
6、t for Resale, 04/20/2007 07:18:48 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 730-1:1994(E) Contents Page 1 Scope 1 2 Normative references . 1 3 Definitions . 1 3.1 General . 2 3.2 Linkage components and dimensions 2 4 Tractor . 5 4.1 Dimensions . 5 4.2 Restriction
7、of transport height . 5 4.3 Interchangeability 5 5 Implement . 8 5.1 Dimensions . 8 5.2 Clearance zone . 8 Annexes A Convergence distances 10 B Bibliography 12 0 IS0 1994 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utlhzed In any form or by any m
8、eans, electronlc or mechanlcal, Including photocopylng and microfilm, wlthout permlsslon In wrltlng from the publisher. Case Postale 56 CH-I 21 1 Genve 20 Swltzerland International Organlzatlon for Standardization Prmted In Swltzerland II Copyright International Organization for Standardization Prov
9、ided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 07:18:48 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 730-1:1994(E) Foreword IS0 (the International Organization for Standardization) is a worldwide federatio
10、n of national standards bodies (IS0 member bodies). The work of preparing International Standards 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.
11、 International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technic
12、al committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 YO of the member bodies casting a vote. International Standard IS0 730-1 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and f
13、orestry, Subcom- mittee SC 4, Tractors. This third edition cancels and replaces the second edition (IS0 730-1 :I9901 and IS0 730-3:1982, of which it constitutes a combina- tion and a technical revision (see clause 1). IS0 730 consists of the following parts, under the general title Agricultural whee
14、led tractors - ear-mounted three-point linkage: - Part 1: Categories 1, 2, 3 and 4 - Part 2: Category 1 N (Narrow hitch) Annexes A and B of this part of IS0 730 are for information only. . 111 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NA
15、SA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 07:18:48 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD Q IS0 IS0 730-1:1994(E) Agricultural wheeled tractors - Rear-mounted three-point linkage - Part 1: Categories 1, 2, 3 and 4 1 Scope
16、 This part of IS0 730 specifies the dimensions and re- quirements of the three-point linkage for the attach- ment of implements or equipment to the rear of agricultural wheeled tractors. It specifies four categories to be used on different ranges of agricultural tractors as shown in table l . Table
17、1 - Categories PT0 power at rated rotational Category frequency of enginel) kW 1 150 to 350 4 80 to 185 3 up to 92 2 up to 48 1) Determined in accordance with IS0 789-1. Category 4 has been divided into two parts, 4L and 4H, depending on the location of the power take-off (PTO). Category 4L and 4H d
18、imensions apply to trac- tors with the PTO, respectively, below and above the rear axle centreline. Dimensions and requirements for the three-point linkage for the attachment of implements or equip- ment to the front of agricultural tractors are given in IS0 8759-2C31. 2 Normative references The fol
19、lowing standards contain provisions which, through reference in this text, constitute provisions of this part of IS0 730. 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 730 are encouraged to in
20、vestigate the 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 789-1 : 1990, Agricultural tractors - Test pro- cedures - Part l: Power tests for power take-off. IS0 2332:1993,
21、Agricultural tractors and machinery - Connection of implements via three-point linkage - Clearance zone around implement. 3 Definitions For the purposes of this part of IS0 730, the following definitions apply. General definitions are given in 3.1, and definitions for components and dimensions in 3.
22、2. The last element of the definition number in 3.2 is also the key number for the element or dimension in figures 1, 2 and A.l. 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007
23、 07:18:48 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 730-1:1994(E) Q IS0 3.1 General 3.2.9 upper link attachment: Pin by which the up- per link is connected to the tractor. 3.1.1 linkage: Combination of one upper link and two lower links, each articulated to the tr
24、actor and the implement at opposite ends, in order to connect the implement to the tractor. 3.1.2 hitch point: Articulated connections between link and implement. NOTE 1 For geometrical purposes the hitch point is the centre of the articulated connection between link and im- plement. 3.1.3 link poin
25、t: Articulated connection between link and tractor. NOTE 2 For geometrical purposes the link point is the centre of the articulated connection between link and trac- tor. 3.1.4 three-point hitch coupler: Device which fa- cilitates the connection of the tractor three-point link- age to the implement.
26、” 3.2 Linkage components and dimensions 3.2.1 upper link: Upper linkage element, fitted with an articulated connection at both ends. 3.2.2 lower link: Lower linkage element, fitted with an articulated connection at both ends. 3.2.3 tween 3.2.4 tween 3.2.5 tween 3.2.6 tween 3.2.7 upper hitch point: A
27、rticulated connection be- the upper link and the implement. lower hitch point: Articulated connection be- a lower link and the implement. upper link point: Articulated connection be- the upper link and the tractor. lower link point: Articulated connection be- a lower link and the tractor. upper hitc
28、h attachment: Pin, usually detachable and forming part of the upper link as- sembly, by which an upper link is secured. 3.2.8 lower hitch attachment: Pin, or clevis and pin, usually attached to the implement, by which a lower link is secured. 3.2.10 linch pin: Pin, usually fitted with a spring- reta
29、ining device, by which an articulated connection is retained in position.2) 3.2.11 lift rods: Connections that transmit force to the lower links for raising and lowering. 3.2.12 mast: Component that provides location of the upper hitch point on the implement. 3.2.13 mast height: Vertical distance be
30、tween the upper hitch point and the common axis of the lower hitch points. 3.2.14 lower hitch point height: Height of the centre of the lower hitch points above ground level when they are fully lowered using the full extent of manual adjustment provided in the lift rods in con- junction with the mov
31、ement range with the lower hitch point axis maintained horizontal to the ground in a transverse plane. 3.2.15 levelling adjustment: Movement, measured vertically, of either lower hitch point higher or lower than the other, to allow inclination of the implement, measured with one lower link horizonta
32、l. 3.2.16 lower hitch point span: Distance between the shoulders of the lower hitch pins against which the sides of the lower link ball joints abut. 3.2.17 linch pin hole distance: Distance from the centreline of the linch pin hole to the shoulder of the hitch pin. 3.2.18 movement range: Vertical mo
33、vement of the lower hitch points corresponding to the power travel of the lift, excluding any adjustment in the lift rod linkage. 3.2.19 transport height: Total height of the lower hitch points above the ground using the full extent of manual adjustment provided in the lift rods in con- junction wit
34、h the movement range, with the lower hitch point axis maintained horizontal to the ground in a transverse plane. 1) For examples, see annex B, C 4 l to VI. 2) See annex B, *l. 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical St
35、andards 1/9972545001 Not for Resale, 04/20/2007 07:18:48 MDTNo reproduction or networking permitted without license from IHS -,-,- Q IS0 m 4851903 0581134 345 m IS0 730-1:1994(E) 3.2.20 lower hitch point clearance: Clearance ex- longitudinal vertical plane with the implement raised pressed as a radi
36、al dimension from the lower hitch to transport height and all side-sway prevented. point axis to the outside diameter of the tyre, mudguard or other part of the tractor, measured in a 3.2.21 Pitch: Angle of the fnast to the vertical. con- sidered positive when anticlockwise viewed from the left-hand
37、 side of the tractor. 9 6 1 Upper link 2 Lower link 3 Upper hitch point 4 Lower hitch point 5 Upper link point 6 Lower link point 7 Upper hitch attachment 8 Lower hitch attachment 9 Upper link attachment 10 Linch pin 11 Lift rods 12 Mast 13 Mast height 16 Lower hitch point span 17 Linch pin hole dis
38、tance Figure 1 - Components of three-point hitch 3 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 07:18:48 MDTNo reproduction or networking permitted without license from IHS -,
39、-,- IS0 730-1:1994(E) Q IS0 14 Lower hitch point height 15 Levelling adjustment 18 Movement range 19 Transport height 20 Lower hitch point clearance NOTE - Some dimensions are shown in figures 1 and A.1. Figure 2 - Dimensions of three-point hitch 3.2.22 mast adjustment: Usable range of pitch of the
40、mast from a vertical plane. It is measured at the maximum and minimum height of the lower hitch points above the ground between which the mast (3.2.121, when using the specified mast height, can be adjusted to any inclination between + 5“ and - 5“ from the vertical. NOTES 3 Mast adjustment is not sh
41、own in figure 1. 4 Adjustment of the mast controls the pitch of the irn- plement. Specifying the mast adjustment to be provided enables the tractor designer to determine the minimum ac- ceptable adjustment of the length of the top link in relation to the points of attachment of the linkage. It also
42、permits the implement designer to determine the range of operating depths of the implement over which pitch adjustment can be obtained. 3.2.23 torsional free float distance: Vertical dis- tance that either of the lower hitch points can move free relative to the other to allow the implement to roll,
43、with lower links initially horizontal. 3.2.24 transport pitch: Pitch reached by the mast when lifted to standard transport height from a pos- ition with horizontal lower links and vertical mast. 3.2.25 horizontal convergence distance: Horizon- tal distance from the lower hitch points to the point of
44、 convergence of the lower links when the lower links are horizontal and laterally symmetrical, seen in a plan view (see figureA.l). 4 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2
45、007 07:18:48 MDTNo reproduction or networking permitted without license from IHS -,-,- Q IS0 IS0 730-1:1994(E) 3.2.26 vertical convergence distance: Horizontal distance from the lower hitch points to the point of convergence formed in the vertical longitudinal plane by the top link and the lower lin
46、ks (see figure A.1). 4 Tractor 4.1 Dimensions Dimensions apply to the tractor equipped with the normal range of tyre sizes as recommended by the tractor manufacturer. 4.1.1 Hitch points The dimensions concerning the hitch points shall be as given in figures 3 and 4, and table2. 4.1.2 Upper link poin
47、t Upper link point arrangements shall be provided so that transport pitches of - 3“ to + 3“ and + IO“ to + 15“ can be achieved with the standard mast height. 4.1.3 Torsional free float Torsional free float shall be provided at a distance as given in table3. It shall be possible to block the torsiona
48、l free float. 4.1.4 Lift, movement range and levelling adjustments The ranges of lift, movement range and levelling ad- justment shall be as specified in table3. 4.1.5 Convergence distances See annex A. 4.2 Restriction of transport height Tractors shall have means by which the operator can easily restrict the transport height by, for example an adjustable stop, particularly to avoid damage to the PTO-shafts of the machine. 4.3 Interchangeability Provisions shall be made in the design of the lower links, or by the use