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1、 STD-ASAE SZL7-LL-ENGL 1999 D 0759530 0007278 252 . ASAE S217.11 DEC99 Three-Point Free-Link Attachment for Hitching Implements to Agricultural Wheel Tractors propased by ihe Advisory Engitntenng commiftee of the Farm and Indufin81 Eqment InsMe: adopled by AUE Match lW4; revised 1961, l W , 1963, Ju
2、ne 1964, Deaember lm, March 1971, Febnrary 1972, Apnl 1974, Feinua 1975; revised ed/totiaily April 1 9 n ; mfimed Deaember 1979, December 1984, hcember 1989; revised December 1991; reaflmmdliecember 1993, December 1997, December lsss; revised editorial m f f i i r m e d for one year lkxmber 1999. 1
3、scope 1 . 1 This Standard sets forth requirements for the attachment of three point hitch implements or equipment to the rear of agricultural wheel tractors by means of a threepoint iree-link in association with a power l i 19 In order to assure proper pedmance of certain implements, standard dimens
4、ions for mast height, mast pitch adjusiment and implement leveling adjustment are included. Location of link-attachment points is not restricted and is, therefore, left to the discretion of the tractor designer. 1 . 3 If draft links are used for ttaiing power take-off implements, a means shall be in
5、cluded for locking the draft links in a fixed position, and a drawbar hitch point shall be positioned in conformance with power take- off standards. 1.4 Dimensions comprising the standard speucations are divided into 4 categories: Crtr(i0iv Mulmum drawbar Power, k W I 15to35 (20 to 45 hp) II 30 to 7
6、5 (4 to 1 W hp) 111 and III“ 6ot0166 (80 to 225 hp) IV and IV-“ 135 to 300 (180 to 400 hp) *Based on CAE J2708. Refer to Cection 3, Cpeciai Hitch CifiegorieS. UPPER LINK POINT LOWER LINK POINT 2 Definition of terms 21 Unkage: The combination of 1 upper link and 2 lower links, each articulated to the
7、 tractor and the implement at opposite ends in order to connect the impiement to the tractor. 2 . 2 Upper link, lower link Elements in the linkage. 23 Hitch point The arailated connection between a link and the implement. For geometrical analysis, the hitch point is established as the center of aie
8、aracUlated don between a link and the implement. 2.4 Unk point: The arailated conneciion between a link and the tractor. For geometrical analysis, the link point is established as the center of the artiaiiated connection between a link and the tmctor. 25 Upper hitch point: The articulated connection
9、 between the upper link and the implement 2.6 Upper link point: The araculated connection between the upper link and the tractor. 2.7 Lower hitch point The articulated connection between a lower link and the implement. 2.8 Lower Ilnk point: The articulated connection between a lower link and the tra
10、ctor. 2.9 Upper hitch pin: The pin that connects the upper link to the implement. 2.10 Upper link pln: The pin that connects the upper link to the tractor. 211 Lower hitch stud or pin: The stud or pin, attached to the impiement, on which a lower link is secured. 2.12 Linchpin: The retaining pin used
11、 in the hitch pins or studs. 2.13 Mast: The member that provides attachment of the upper link to the implement. 2.14 Mast height: The perpendicular distance between the upper hitch point and common axis of the lower hitch points. 2.15 Mast adjustment: The usable range of movement of the mast in a ve
12、rticai plane. It is measured as the maximum and minimum heights of the lower hitch points above the ground between Whkh a masi of standard height can be adjusted to any inclination between 5 deg toward the rear from vercal and 5 deg toward the front rom vertical. Adjustment of the mast controls the
13、pitch of the implement. Cpecirying the mast adjustment to be provided enables the tractor designer to determine the minimum acceptable ajustment of the length of the top link in relation to UPPER HITCH r- MAST HEIGHT LOWER HITCH / POINT UPPER HITCH PIN LOWER HITCH / POINT LOWER HITCH LINCHPIN HOLE D
14、ISTANCE flgum 1 - Tractor linkage flgure 2 - Dlmenrions associated with implement ASAE STANDARDS 2000 81 Copyright American Society of Agricultural and Biological Engineers Provided by IHS under license with ASABE Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 06/05/2007 02
15、:52:09 MDTNo reproduction or networking permitted without license from IHS -,-,- STDmASAE S217.11-ENGL 3999 W 0759530 0007279 399 D UPPER HITCH POINT ADJUSTMENT AREA UPPER LINK POINl LOW HITCH POINT (MAX) KEY POINT ON P T O POINT (MIN) SCALE - 1/10 flgun 3 - imnshs assocMd with tractor flgum 4 - hlt
16、chpdnt brictor d r a m Tabk 1 - im rissoclated with impiemant Categwy I categaiy II I I r caiegarv“ Millimeter Inches Millimeter Inches Millimeter Inches MiWimeter Inches Min Max Min Max h Maw Min Max Min Max Min Maw Min Max Min Max UPPER HTTCH POINT m %ide m outside clearance radius for upper mk*t
17、HW pin hole dameter SiUd diameter Unchph hole distance undipin hole diameter Lomii hitch point spread Clearam radius for Inver link* impiement encroadimant in front of lower hitch pohi I implement exIends late behd Ure LOWER HITCH POINT IMPLEMENT MAST HEIGHT10 44.5 - 1.75 - 85.9 - 3.38 19.3 19.56 0.
18、76 0 . 7 l 57.2 - 2.25 - 21.84 22.10 0.86 0.87 38.86 1.53 11.68 12.19 0.46 0.48 681.0 684.3 26.81 26.94 63.5 2.50 12.7 0.5 457 18 52.3 - . 95.3 57.2 26.65 25.91 23.19 28.45 46.52 11.68 12.19 8225 825.5 732 12.7 483 2.06 - - 3.75 2.25 - 1.01 1.02 1.11 1.12 1.91 0.46 0.48 32.38 32.50 2.88 0.5 19 52.3
19、- . 95.3 57.2 - 32.0 32.26 36.32 36.58 48.52 - 11.68 12.19 963.7 966.7 82.6 - 12.7 559 2.06 - 2.25 - 1.26 1.27 - 3.75 1.43 1.44 1.91 - 0.46 0.48 37.94 38.06 3.25 . 0.5 22 65- . 132 76.2 - 45.2 45.5 49.7 50.8 68 17.5 18 1165 1168 82.6 - - 12.7 886 2.58 - - 5.20 3.00 - 1.78 1.79 1.96 2.00 2.68 - 0.69
20、0.71 45.87 45.99 3.25 - 0.5 27 *Some bactors with qukk-attachable connectors require 140 mm (5.50 in.) space for clearance above the upper hitch point and below the lower hitch points. +Refer to standard for attachment of implements to agricultural wheel tractors equipped with quick-attaching couple
21、r for three-point free link hitch. Tractors equipped with a standard quick-attaching coupler for the threegoint W i n k hitch require an auxiliary attaching pin on the implement mast located 76 mm (3.0 in.) for categories I and 111, and 102 mm (4.0 in.) for Category II, below the standard upper hitc
22、h point. To facilitate attachment and detachment of the implement a clearance zone must be maintained 76 mm (3.0 in.) rearward from and extending 104 mm (4.10 in.) above and 216 mm (8.50 in.) below this pin. In addiion, a dearance zone must be maintained 94 mm (3.70 in.) rearward from and extending
23、25 mm (1.0 in.) above and 211 mm (8.30 in.) below each lower hitdi point To facilitate c a r attachment and detachment of the implement with tractors equipped with a standard Category IV-N or IV quick-attaching coupler for the threepoint W i n k hitch, a clearance zone must be maintained 85 mm (3.35
24、 in.) reatwad from and extending 120 mm (4.75 in.) above and 252 mm (9.92 in.) below the siandard upper htch point on the implement masi. In addition, a clearance zone must be maintained 94 mm (3.7 in.) reaward from and extending 32 mm (1.26 in.) above and 272 mm (10.71 in.) below each lower hitch p
25、oint %e mast height is not necessarily a mechanical dimension on the implement itself. It is a figure used in design and if properly used for design of both implement and tractor, a well performing interchangeable implement and tractor combination wul be achieved. This standard makes it possible to
26、produce tractors and implements that will give good perfomnce in any combination; therefore, consideration to hitch geometry is essential. This makes it desirable to establish a standard m a s t height and a standard mast adjustment within a working range, because these items influence the position
27、of hitch points that are common to both the implement and the tractor. Mast height is one of the essential factors in establishing the viftual hitch point of the free-link system, draft signal for the draft-responsive system, loads on the linkage and hitch points, changes in implement pitch correspo
28、nding to changes in working depth, implement pitch when the implement is in transport position, clearance of the implement with the tractor, especially in transport position and clearance of the hitch links with the implement or with the tractor, especially in the tmnspoti piOn. When an implement ma
29、st height is made different than standard to accomplish some specific performance feature, care should be exercised to inswe that the desired performance is secured with tractors likely to operate the implement. Some Category II tractors are designed to accommodate a 559 mm (22 in.) mast height for
30、optimum performance. In the design of implements for use on these tractors care should be taken to investigate the need for providing a 559 mm (22 in.) mast height. Tractors that are designed only for use with 559 mm (22 in.) mast height must be properly identified. “See Section 3 for Categoiy IV-N
31、or Ill-N, Nanow Hitch, dimensions. 82 ASAE STANDARDS 2000 Copyright American Society of Agricultural and Biological Engineers Provided by IHS under license with ASABE Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 06/05/2007 02:52:09 MDTNo reproduction or networking permitt
32、ed without license from IHS -,-,- * STD-ASAE S217.11-ENGL 1997 = 0759530 0007280 900 the point of attachment of the linkage; it also pennits the impiement designer to detennine the range of operating depths of the implement over which pitch adjustment can be obtained. 216 Levellng adjustment: The ad
33、justment of the lower links so that 1 lower hitch point may be moved vercaiiy with respect to the other lower hitch point to provide an indination of t h e impiement 2 . 1 7 Lowcu hltchpolnt spreiid; The dis$nce between lower hitch points measured at the base of the lower hitch stud, or the distance
34、 between the inner most restraining means povided on the implement 2 . 1 8 Linchpin hole didence: The distance between the lindipin hole centerline and the lower link stud base. 2.19 Liit linkage: The connecting linkage that transmits force to the lower links for raising and lowering. 2J Lift range:
35、 The range of movement o the lower hitch points utilizing the extent of manual adjustment pravided in the lift linkage in conjunction with the power range, expressed as the maximum and minimum possible heights of the lower hitch points above ground level, the lower hitch point axis being maintained
36、horizontal to the ground. 221 Power range: The total veitical movement of the iower h M point axduding any adjustment in the linkage or lift linkage. 222 Lorn# hitch-pdnt tire ckaran: Clearance expmsed as a radial dimension from the lower hitch point tothe outside diameter of the t i r e with the im
37、plement in raised position and a H side sway removed from the links. 223 Lower hitch-polnt tractor ckarance: The horizontal dimension between the rearmost parts of the tractor in the area between the 2 draf links and the horizontai line through the 2 lower hitch points throughout Ihe range of vertic
38、al movement of the hitch points (see Fig. 4). The power take4 master S h i may be removed, if necessy, to meet this dmenSion. MMnatef Inbiss Mwnber Inches Mlllmeter Inches Millier Inches Mh Max Min Max Min Max Min Max Min Max Min Max Min Max Mhi Max - UPPER UNK Whith at hitch point Radlus at hitch p
39、oint Hitch pin hole diameter Side sway al hitch point UPPER HITCH PIN Diameter Distance hom head 10 CenMine of inchpin hde Linchpin hde dameter widm al hitch point R a d i u s at hitch point stud hole diameter Lomw hitch point tire ckwence w m largest LOWER LINK Code R-1 tim offered Lower h M point
40、tractor clearsnce side sway al hitch point esch side of center pmitiun wih links homOn$lt lower hitch points wih dm links hwizontel Horizwnal dis$nce from end of PTO ahait io UFT RANGE. POWER RANGE, AWUSTMEMS uffrange Max height for lower position Min herght for hi% namely, the lower h M point sprea
41、d is 822.5 mm ( 3 2 . 3 8 in.yeW.5 mm ( 3 2 . 5 0 in.) (same as b l i n k hitch are the same as Category 111 in Tables I and 2. from the Category IV hkh in the fdlowkig amensionS: Lower hitch paint spread is 919 mm (36.18 in.)/922 mm (36.30 in.). Leveling adjustment is same as Categoiy 111. All othe
42、r dhnensions for the Category IV-N three point free-link hitch are the same as Categofy IV in Tables 1 and 2. cakgoly il). All o m amensions for the category Ill-N three point 3.1.2 -hl -iy IV MnoW hitch (Na). ThS speCd hitch differs 4 Tractor lift force capacity 41 Tractors shall have the following
43、 minimum li force available throughout the power range, at a distance of 610 mm (24 in.) to the rear of the lower h M points, when tested in accordance with ASAE Standard W9, Test Procedure for Measuring Hydraulic Lift Capacity on Agricultural Tractors Equipped With Three-Point Hitch. 4.1.1 Through
44、65 k W maximum drawbar power: 310 N per kW drawbar power. 4.1.2 Above 65 kW maximum drawbar power: 20.15 kN plus 155 N per kW rawbar power above 65 kW drawbar power. 4 . 2 In customaiy units, the expressions for paragraphs 4.1.1 and 4.1.2 4.21 Through 85 maximum drawbar horsepower: 52 Ib per drawbar
45、 horsepower. 4 2 9 Above 85 maximum drawbar horsepower: 4420 Ib plus 26 Ib per drawbar horsepower above 85 drawbar horsepower. are: cited standards: AWE W 9 , Test Procedure for Measuring Hydraulic Lift Capa* on SAE 5711 MARSI, Tire Selection Tables for Agricultural Tractors of SAE 52708, Agricultur
46、al Tractor Test Code Agricultural Tractors Equipped Wh Three-Point Hkh Future Design 84 ASA STANDARDS 2000 Copyright American Society of Agricultural and Biological Engineers Provided by IHS under license with ASABE Licensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 06/05/2007 02:52:09 MDTNo reproduction or networking permitted without license from IHS -,-,-