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1、S T A N D A R D ASABE is a professional and technical organization, of members worldwide, who are dedicated 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 an
2、d Biological Engineers to meet standardization needs within the scope of the Society; principally agricultural fi eld equipment, farmstead equipment, structures, soil and water resource management, turf and landscape equipment, forest engineering, food and process engineering, electric power applica
3、tions, plant and animal environment, and waste management. NOTE: ASABE Standards, Engineering Practices, 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 attrib- utable to the applica
4、tion of ASABE Standards, Engineering Practices, and Data. Conformity does not ensure compliance with applicable ordinances, laws and regulations. Prospective users are responsible for protecting themselves against liability for infringement of patents. ASABE Standards, Engineering Practices, and Dat
5、a initially approved prior to the society name change in July of 2005 are designated as ASAE, regardless 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 St
6、andards as are all ISO adoptions published by ASABE. Adoption as an American National Standard requires verifi cation 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
7、Standards Review, substantial agreement has been reached by directly and materially affected interests. 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 tow
8、ard their resolution. CAUTION NOTICE: ASABE and ANSI standards may be revised or withdrawn at any time. Additionally, procedures of ASABE require that action be taken periodically to reaffi rm, revise, or withdraw each standard. Copyright American Society of Agricultural and Biological Engineers. Al
9、l rights reserved. ASABE, 2950 Niles Road, St. Joseph, MI 49085-9659, USA ph. 269-429-0300, fax 269-429-3852, hqasabe.org ANSI/ASAE S278.7 JUL03 (ISO 11001-1 1993) Agricultural wheeled tractors and implements Three- point? ? hitch couplers Part 1: U-frame coupler ANSI/ASAE S278.7 JUL03 (ISO 11001-1
10、1993) Approved September 2003 by American National Standards Institute Agricultural wheeled tractors and implements Three- point hitch couplers Part 1: U-frame coupler Proposed by Advisory Engineering Committee of Farm and Industrial Equipment Institute; approved by ASAE Power and Machinery Division
11、 Technical Committee; adopted by ASAE December 1964; revised December 1965, June 1967; reconfi rmed December 1971; revised April 1974, February 1975; corrected editorially April 1977; revised December 1978, March 1980; reconfi rmed December 1984; revised editorially and reconfi rmed December 1989; r
12、eaffi rmed December 1994; revised editorially February 1995; reaffi rmed December 1999, January 2001, December 2001, February 2003. Adoption with modifi cation of ISO 11001-1:1993 (E) and addition of ASAE Forward with deviations July 2003. Approved by ANSI September 2003. 0 Forward 0.1 This ASAE doc
13、ument, ANSI/ASAE S278.7, Agricultural wheeled tractors and implements Three-point hitch couplers Part 1: U-frame coupler, is equivalent to ISO 11001-1:1993 (E) except for the technical deviations as noted in the following forward sections. These technical deviations pertain to those provisions where
14、 harmonization could not be achieved between the ASAE and the International Standard. ISO 11001- 1:1993 does not contain some technical information that has been in the content of ASAE Standard S278. The responsible ASAE technical committee considered this information relevant and important to maint
15、ain in the document. 0.2 It has been found from experience that certain large implements used with dual rear tires and narrow crop row spacing require a special category narrow hitch. The difference between ISO 11001-1 and ASAE S278 is that the Special Hitch Coupler Categories (Category 3N and 4N) w
16、ere omitted from ISO 11001-1.All the dimensions inASAE S278.6 were exactly the same in ISO 11001-1. The ASAE Table 1 footnotes are noted in Section 4 of the ISO document. The ASAE Table 2 footnotes are listed in Section 5 of the ISO document. Dimension K1 in Table 2 of ASAE is listed in paragraph 5.
17、4 of the ISO document. Dimension b2 shown in Table 2 of the ISO document was added to completely defi ne the clearance envelope in this area (the ASAE document was incomplete in this regard). The PTO to hitch dimensions are not made in the ISO document, as they are in paragraph 3.2.4 in ASAE, they a
18、re contained in the referenced ISO 730-1. 0.3 The responsible committee has reviewed the normative references listed in ISO 11001-1 and no additional documentation or deviations are required. 0.4 This standard had been approved as anAmerican National Standard by ANSI (American National Standards Ins
19、titute). ASAE technical content was provided as the original basis for this ISO standard. 0.5 ASAE technical deviations from ISO 11001-1 are: 0.5.1 Special category 3N narrow hitch coupler. The dimensions of special category 3N shall be as follows: 0.5.1.1 Dimension l1, l3, l4, l5, l6and l7in Table
20、1 shall be in accordance with Category 2. All other dimensions shall be in accordance with Category 3. 0.5.1.2 Dimensions l1and l2in Table 2 shall be in accordance with Category 2. All other dimensions shall be in accordance with Category 3. 0.5.2 Special category 4N narrow hitch coupler. The dimens
21、ions of special Category 4N shall be as follows: 0.5.2.1 Dimension l1, l3, l4, l6and l7in Table 1 shall be: l1= 925-930mm (36.42-36.61 in.) l3= 858mm (33.78 in.) l4= 1174mm (46.22 in.) l6= 858mm (33.78 in.) l7= 1174mm (46.22 in.) All other dimensions shall be in accordance with Category 4. 0.5.2.2 D
22、imension l1in Table 2 shall be 919-922mm (36.18-36.30 in.). Dimension l2in Table 2 shall be in accordance with Category 3. All other dimensions shall be in accordance with Category 4. ANSIASAE S278.7 JUL03 ISO 11001-1 1993118ASABE STANDARDS 2006 -,-,- 1 Scope This part of ISO 11001 specifi es the es
23、sential dimensions for the attachment of three-point hitch implements to agricultural wheeled tractors equipped with a three-point free link hitch according to ISO 730-1, ISO 730-3 or ISO 8759-2, and a U-frame hitch coupler. NOTE 1 In general, the dimensions associated with the tractor and the imple
24、ment for use with hitch couplers are the same as those for the three-point linkage specifi ed in ISO 730-1, ISO 730-3 or ISO 8759-2, and those for the clearance zone specifi ed in ISO 23321). The three-point hitch coupler systems constitute a special method of implement mounting. The hitch couplers
25、are an additional component located between the three-point linkage and the implement, making it possible to hitch and unhitch from the operators seat. Due to the special construction and function of hitch couplers, it may be necessary to vary the length of the links indicated in the referenced stan
26、dards. This part of ISO 11001 applies to Categories 2, 3 and 4 of agricultural wheeled tractors as defi ned in ISO 730-1 and ISO 730-3. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 11001. At the tim
27、e of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO 11001 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain r
28、egisters of currently valid International Standards. ISO 730-1: 1990, Agricultural wheeled tractors Rear-mounted three- point linkagePart 1Categories 1, 2 and 3. ISO 730-3: 1982, Agricultural wheeled tractorsThree-point linkage Part 3: Category 4. ISO 8759-2:1985, Agricultural wheeled tractors Front
29、-mounted linkage and power take-off Part 2: Front linkage. 3 Principle of frame coupler system A frame coupler system is a one-phase implement coupler where the three-point linkage of the tractor (see ISO 730-1, ISO 730-3 or ISO 8759-2) is fi tted with a U-frame and the implement has the provisions
30、to be mounted to the frame. Hitching and unhitching can be operated from the tractor operators seat. 4 Coupler dimensions Coupler dimensions shall comply with fi gure 1 and table 1. 4.1 The upper hook offset (dimension b5) shall be not more than 15,75 mm greater or 6,35 mm less than the lower socket
31、 offset (dimension b1) 4.2 The implement shall provide clearance when attached to the coupler to permit lowering all elements of the coupler 120,9 mm minimum for categories 2 and 3, and 146 mm minimum for category 4, to ensure satisfactory attachment and detachment of the implement from the coupler.
32、 4.3 The upper hook of the quick coupler shall be at the centre of the lower sockets within 3 mm. 4.4 The lower implement attaching point on the quick-attaching coupler shall be located in the vertical position such that the lift range, power range and levelling adjustment, as specifi ed in ISO 730-
33、1 and 150 730-3, are fulfi lled. 4.5 Implement components, other than the hitch pins, that are in alignment with the lower socket width (dimension?1) shall not extend forward of the centreline of the lower socket for a distance of 203 mm above the lower socket. Components above this height, extendin
34、g laterally more than 381 mm from the coupler centreline, shall not extend more than 25 mm forward of the vertical centreline through the upper hook opening. 4.6 The lower socket width (?1) shall be maintained within the area defi ned by dimensions b2, h6, h7and b9. 4.7 The lower link to coupler pin
35、s may be recessed to provide design freedom to obtain structural integrity in the coupler frame, resulting in a common dimension for l3and l6, and l4and l7, respectively. 1)ISO 2332:1983, AgriculturaltractorsandmachineryConnections Clearance zone for the three-point linkage of implements. Figure 1 C
36、oupler dimensions ANSIASAE S278.7 JUL03 ISO 11001-1 1993ASABE STANDARDS 2006119 5 Dimensions associated with implement Dimensions associated with the implement shall comply with fi gure 2 and table 2. 5.1 For implements with cantilever-mounted lower hitch pins, special quick coupler hitch pins shall
37、 be supplied to dimensions d1, l1, l2and d2. Adapter bushings may be supplied which convert existing three-point hitch pins to dimensions d1, l1, l2and d2instead of special quick coupler hitch pins. For three-point hitch implements on which the lower hitch points consist of straddle-mounted pins, no
38、 additional thrust surfaces are required, providing the pin diameter and support dimensions conform to dimensions d1, l1, l2and b1 The method used and dimensions related to attaching the pins or adaptor bushings to the implement are at the discretion of the implement manufacturer. 5.2 The lower impl
39、ement attaching point on the quick attaching coupler shall be located in the vertical position such that the lift range, power range and levelling adjustment, as specifi ed in ISO 730-1 and ISO 730-3, are fulfi lled. 5.3 Implement components, other than the hitch pins, that are in alignment with the
40、 lower socket width dimension?1 (see fi gure 1 and table 1) shall not extend forward of the centreline of the lower socket for a distance of 203 mm above the lower socket. Components above this height extending laterally more than 381 mm from the coupler centreline shall not extend more than 25 mm f
41、orward of the vertical centreline through the upper hook opening. 5.4 The adapter or lower hitch pin shall be in line within 0,015 mm per 1 mm of pin length. 5.5 The implement shall provide clearance when attached to the coupler to permit lowering all elements of the coupler 120,9 mm minimum for cat
42、egories 2 and 3, and 146 mm minimum for category 4, for satisfactory attachment and detachment of the implement from the coupler. 5.6 The upper hook opening on the implement shall be at the centre of the lower hitch pin shoulders within 3 mm. 5.7 Provisions shall be made for adequate upper hook clea
43、rance in those implements which require landing or levelling. 6 Locking device A positive latch shall be provided to prevent an unintentional separation of the implement. Table 1 Coupler dimensions Dimensions in millimeters ANSIASAE S278.7 JUL03 ISO 11001-1 1993120ASABE STANDARDS 2006 -,-,- Figure 2 Dimensions associated with implement Table 2 Dimensions associated with implement Dimensions in millimeters ANSIASAE S278.7 JUL03 ISO 11001-1 1993ASABE STANDARDS 2006121 -,-,-