1、 ANSI/ASABE AD730:2009 W/Amd. 1:2014 MAR2015 Agricultural wheeled tractors Rear-mounted three-point linkage Categories 1N, 1, 2N, 2, 3N, 3, 4N and 4 American Society of Agricultural and Biological Engineers ASABE is a professional and technical organization, of members worldwide, who are dedicated t
2、o 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 agricultura
3、l 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 Practices, and D
4、ata 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 applicable
5、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“, regardless of th
6、e 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 requires ve
7、rification 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 interests. Sub
8、stantial 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 CAUTION NOTICE: ASABE and ANSI standards may be revised or withdrawn at any time. Add
9、itionally, 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 269-429-3
10、852, hqasabe.org ANSI/ASABE AD730:2009 W/Amd. 1:2014 Copyright American Society of Agricultural and Biological Engineers 1 ANSI/ASABE AD730:2009 W/Amd. 1:2014 MAR2015 Approved April 2015 as an American National Standard Agricultural wheeled tractors Rear-mounted three-point linkage Categories 1N, 1,
11、 2N, 2, 3N, 3, 4N and 4 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 ANSI/ASABE AD730:2009 DEC2012 stand
12、ard should be submitted to ASABE. History of ASAE S217, Three-Point Free-Link Attachment for Hitching Implements to Agricultural Wheel Tractors: Proposed by the Advisory Engineering Committee of the Farm and Industrial Equipment Institute: adopted by ASAE March 1959; revised 1961, 1962, 1963, June 1
13、964, December 1966, March 1971, February 1972, April 1974, February 1975; revised editorially April 1977; reconfirmed December 1979, December 1984, December 1989; revised December 1991; reaffirmed December 1996, December 1997, December 1998; revised editorially March 1999; reaffirmed December 1999;
14、January 2001; revised December 2001 to provide specific comparison to ISO 730-1:1994 E; reaffirmed January 2007. S217 was used as the basis document for ISO 730, Agricultural wheeled tractors Rear-mounted three-point linkage Categories 1N, 1, 2N, 2, 3N, 3, 4N and 4. S217.12 replaced by an adoption w
15、ith deviations of ISO 730:2009 December 2012; approved as an American National Standard January 2013; ISO 730:2009/Amd.1:2014 included to ISO 730:2009 adoption approved March 2015; approved by ANSI April 2015. Keywords: Free-link, Hitch, Hitching implements, Three-point hitch 0 Foreword 0.1 ANSI/ASA
16、BE AD730:2009 W/Amd. 1:2014, Agricultural wheeled tractors Rear-mounted three-point linkage Categories 1N, 1, 2N, 2, 3N, 3, 4N and 4, is an adoption of the identically title ISO documents ISO 730:2009, Agricultural wheeled tractors Rear-mounted three-point linkage Categories 1N, 1, 2N, 2, 3N, 3, 4N
17、and 4 and ISO 730:2009/Amd. 1:2014. Deviations noted in the following Foreword sections pertain to those provisions where harmonization could not be achieved between ASABE and the International Standard. 0.2 ANSI/ASABE AD730:2009 W/Amd. 1:2014 specifies the dimensions and requirements of the three-p
18、oint linkage for the attachment of implements or equipment to the rear of agricultural wheeled tractors. 0.3 Three normative references are listed in ISO 730:2009 and ISO 730:2009/AMD. 1:2014. The responsible ASABE committee has reviewed these references and approved the following deviation: 0.3.1 R
19、eplace ISO 8759-1:1998, Agricultural wheeled tractors Front-mounted equipment Part 1: Power take-off and three-point linkage, with ANSI/ASABE AD8759-1:1998, Agricultural wheeled tractors Front-mounted equipment Part 1: Power take-off and three-point linkage. Any reference to ISO 8759-1:1998 in the p
20、rinted portion of ISO 730:2009 shall be replaced by ANSI/ASABE AD8759-1:1998. 0.4 This standard has been approved as an American National standard by ANSI (American National Standard Institute). The original content of ISO 730 was based on ASAE S217. 0.5 This standard deviates from ISO 730:2009 and
21、ISO 730:2009/AMD. 1:2014 as follows: 0.5.1 See Section 0.3 for Normative reference deviation. 0.5.2 In Table 3 change the value of the movement range for Category 1N from 610 mm to 420 mm. ANSI/ASABE AD730:2009 W/Amd. 1:2014 Copyright American Society of Agricultural and Biological Engineers 2 0.5.3
22、 In Table 2: L dimensions applied to 45 mm shaft also apply to 57.5 mm shaft. Text of ISO 730:2009 and ISO 730:2009/AMD. 1:2014, Agricultural wheeled tractors Rear-mounted three-point linkage Categories 1N, 1, 2N, 2, 3N, 3, 4N and 4, follows. 1 Scope This International Standard specifies the dimensi
23、ons and requirements of the three-point linkage for the attachment of implements or equipment to the rear of agricultural wheeled tractors. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited a
24、pplies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 789-1:1990, Agricultural tractors Test procedures Part 1: Power tests for power take-off ISO 2332:2009, Agricultural tractors and machinery Connection of implements via three-point l
25、inkage Clearance zone around implement ISO 8759-1:1998, Agricultural wheeled tractors Front-mounted equipment Part 1: Power take-off and three-point linkage 3 Terms and definitions For the purpose of this document, the following terms and definitions apply. 3.1 General 3.1.1 linkage combination of o
26、ne upper link and two lower links, each articulated to the tractor and the implement at opposite ends, in order to connect the implement to the tractor 3.1.2 hitch point articulated connection between link and implement NOTE For geometrical purposes, the hitch point is the centre of the articulated
27、connection between the link and the implement. 3.1.3 link point articulated connection between link and tractor NOTE For geometrical purposes, the link point is the centre of the articulated connection between link and tractor. 3.1.4 three-point hitch coupler device which facilitates the connection
28、of the tractor three-point linkage to the implement NOTE For examples, see References 5 to 8. ANSI/ASABE AD730:2009 W/Amd. 1:2014 Copyright American Society of Agricultural and Biological Engineers 3 3.1.5 narrow-hitch N standard hitch in all dimensions except for the lower hitch point span, which i
29、s that of the next smallest category EXAMPLE A category 3N hitch can also be a category 2 hitch in all dimensions excepting the upper and lower hitch point pin diameters, which are category 3. 3.2 Three-point linkage components and dimensions (see Figure 1) 3.2.1 upper link upper linkage element, fi
30、tted 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 upper hitch point articulated connection between the upper link and the implement. 3.2.4 lower hitch point articulated connection between a lower link and
31、 the implement 3.2.5 upper link point articulated connection between the upper link and the tractor 3.2.6 lower link point articulated connection between a lower link and the tractor 3.2.7 upper hitch attachment pin, usually detachable and forming part of the upper link assembly, by which an upper l
32、ink 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 3.2.9 upper link attachment pin by which the upper link is connected to the tractor 3.2.10 linchpin pin, usually fitted with a spring-retaining device, by which an
33、articulated connection is retained in position NOTE See Reference 4. ANSI/ASABE AD730:2009 W/Amd. 1:2014 Copyright American Society of Agricultural and Biological Engineers 4 3.2.11 lift rods connections that transmit force to the lower links for raising and lowering 3.2.12 mast component that provi
34、des the location of the upper hitch point on the implement 3.2.13 mast height vertical distance between 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 the ground level when they are fully lowere
35、d using the full extent of manual adjustment provided in the lift rods in conjunction with the movement range, and when the lower hitch point axis is maintained horizontal to the ground in a transverse plane 3.2.15 levelling adjustment movement allowing inclination of the implement, measured vertica
36、lly and with one lower link horizontal, so that either lower hitch point can be moved higher or lower than the other 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 linchpin hole distance distance
37、 from the centreline of the linchpin hole to the shoulder of the hitch pin 3.2.18 movement range vertical movement 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
38、above the ground using the full extent of manual adjustment provided in the lift rods in conjunction with the movement range, with the lower hitch point axis maintained horizontal to the ground in a transverse plane 3.2.20 lower hitch point clearance clearance, expressed as a radial dimension, from
39、the lower hitch point axis to the outside diameter of the tyre, mudguard or other part of the tractor, measured in a longitudinal vertical plane with the implement raised to transport height and all side-sway prevented 3.2.21 pitch angle of the mast to the vertical, considered positive when viewed a
40、nticlockwise from the left-hand side of the tractor ANSI/ASABE AD730:2009 W/Amd. 1:2014 Copyright American Society of Agricultural and Biological Engineers 5 3.2.22 mast adjustment usable range of pitch of the mast from a vertical plane, measured at the maximum and minimum heights of the lower hitch
41、 points above the ground between which the mast, at the specified mast height, can be adjusted to any inclination between + 5 and 5 from the vertical for categories 1, 2N, 2, 3N, 3, 4N and 4, and between the vertical and 10 to the vertical towards the rear for category 1N NOTE 1 Mast adjustment is n
42、ot shown in Figure 1. NOTE 2 Adjustment of the mast controls the pitch of the implement. Specifying the mast adjustment to be provided enables the tractor designer to determine the minimum acceptable adjustment of the length of the top link in relation to the points of attachment of the linkage. It
43、also 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 distance over which either of the lower hitch points can move freely relative to the other to allow the implement
44、 to roll, with lower links initially horizontal 3.2.24 transport pitch pitch reached by the mast when lifted to standard transport height from a position with lower links horizontal and mast vertical 3.2.25 horizontal convergence distance horizontal distance from the lower hitch points to the point
45、of convergence of the lower links when the lower links are horizontal and laterally symmetrical, seen in a plan view NOTE See Annex A. 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
46、 link and the lower links NOTE See Annex A. ANSI/ASABE AD730:2009 W/Amd. 1:2014 Copyright American Society of Agricultural and Biological Engineers 6 Figure 1 Components and dimensions of three-point linkage ANSI/ASABE AD730:2009 W/Amd. 1:2014 Copyright American Society of Agricultural and Biologica
47、l Engineers 7 4 Tractor requirements 4.1 Categories The categories of rear-mounted three-point linkages to be used on the various ranges of agricultural tractors are given in Table 1. Table 1 Categories of rear-mounted three-point linkages Category PTO power at rated rotational frequency of engineak
48、W 1N Up to 35 1 Up to 48 2N / 2 30 to 92 3N / 3 60 to 185 4N / 4 110 to 350 aDetermined in accordance with ISO 789-1. Category 1N and 2N apply to narrow-track agricultural wheeled tractors. Certain specialized implements or farming operations that require narrow spacing require special consideration
49、 for the three-point linkage. Categories 3N and 4N hitch categories have been established to respond to these requirements. Dimensions and requirements for the three-point linkage for the attachment of implements or equipment to the front of agricultural tractors are given in ISO 8759-1. 4.2 Dimensions 4.2.1 General Dimensions apply to the tractor equipped with the normal range of tyre sizes as recommended by the tractor manufacturer. 4.2.2 Hitch points The dimensions related to the hitch poin
