ANSI B92.1-1970(R1993) SAEÃÀ¹ú½¥¿ªÏß»¨¼ü-ÖÐÎÄ·­ÒëÍêÕû°æ ÏÂÔØ±¾ÎÄ

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Combinations of Involute Spline Types.¡ª Flat root side fit internal splines may be used with fillet root external splines where the larger radius is desired on the external spline for control of stress concentrations. This combination of fits may also be permitted as a design option by specifying for the minimum root diameter of the external, the value of the minimum root diameter of the fillet root external spline and noting this as ¡°optional root.¡±

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A design option may also be permitted to provide either flat root internal or fillet root internal by specifying for the maximum major diameter, the value of the maximum major diameter of the fillet root internal spline and noting this as ¡°optional root.¡±

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Interchangeability.¡ª Splines made to this standard may interchange with splines made to older standards. Exceptions are listed below. »¥»»ÐÔ¡££­°´±¾±ê×¼ÖÆÔìµÄ»¨¼üÓë°´¾É±ê×¼ÖÆÔìµÄ»¨¼ü¾ßÓл¥»»ÐÔ¡£ÀýÍâÇé¿öÈçÏ¡£

External Splines: These external splines will mate with older internal splines as follows:

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YearÄê´ú 1946 1950b 1950C 1957 SAE 1960 Major Dia.Fit Flat Root Side Fit Fillet Root Side Fit Íâ¾¶ÅäºÏ ƽ³Ý¸ù³Ý²àÅäºÏ Ô²³Ý¸ù³Ý²àÅäºÏ ¿ÉÒÔ ²»¿ÉÒÔ£¨A£©a ²»¿ÉÒÔ£¨A£© ¿ÉÒÔ£¨B£© ¿ÉÒÔ£¨B£© ¿ÉÒÔ£¨C£© ¿ÉÒÔ£¨B£© ²»¿ÉÒÔ£¨A£© ¿ÉÒÔ£¨C£© ¿ÉÒÔ ²»¿ÉÒÔ£¨A£© ¿ÉÒÔ£¨C£© ¿ÉÒÔ ²»¿ÉÒÔ£¨A£© ¿ÉÒÔ£¨C£© a For exceptions A, B, C, see the paragraph on Exceptions that follows. ¶ÔÓÚABCÀýÍâÇé¿ö¼û

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b Full dedendum. È«³Ý¸ù c Short dedendum. ¶Ì³Ý¸ù

Internal Splines: These will mate with older external splines as follows: ÄÚ»¨¼ü£ºÕâЩ»¨¼ü°´ÈçÏÂÇé¿öÓë¾É±ê×¼Í⻨¼üÏàÅäÇé¿öÈçÏ£º

Major Dia.Fit Flat Root Side Fit Fillet Root Side Fit YearÄê´ú Íâ¾¶ÅäºÏ ƽ³Ý¸ù³Ý²àÅäºÏ Ô²³Ý¸ù³Ý²àÅäºÏ 1946 ²»¿ÉÒÔ£¨D£©a ²»¿ÉÒÔ£¨E£© ²»¿ÉÒÔ£¨D£© 1950 ¿ÉÒÔ£¨F£© ¿ÉÒÔ ¿ÉÒÔ£¨C£© 1957 SAE ¿ÉÒÔ£¨G£© ¿ÉÒÔ ¿ÉÒÔ 1960 ¿ÉÒÔ£¨G£© ¿ÉÒÔ ¿ÉÒÔ a For exceptions C, D, E, F, G, see the paragraph on Exceptions that follows. ¶ÔÓÚ C¡¢D¡¢E¡¢F¡¢G£¬¼ûϺóÃæ½âÊÍ¡£

Table6.Spline Terms, Symbols, and Drawing Data, 30-Degree Pressure Angle, Flat

Root Side Fit ANSI B92.1-1970, R1993 30-Deg Pressure Angle The fit shown is used in restricted areas (as with tubular parts with wall thickness too small to permit use of fillet roots, and to allow hobbing closer to shoulders, etc.) and for economy (when hobbing, shaping, etc., and using shorter broaches for the internal member). ͼÖбíʾֻÊÊÓÃÏÞ¶¨µÄ·¶Î§£¨±ÈÈç²»ÔÊÐíÔ²½ÇµÄ¹Ü×´±Úºñ£¬»òÕß¹öϳ½Ó½ü»ùÌåµÈ£©£¬Ò²¸ü¾­¼Ã¡£ Press fits are not tabulated because their design depends on the degree of tightness desired and must allow for such factors as the shape of the blank, wall thickness, material, hardness, thermal expansion, etc. Close tolerances or selective size grouping may be required to limit fit variations. ¹ýÓ¯ÅäºÏδÁгö£¬ÒòΪÉè¼ÆÒª¸ù¾Ý½ôÅäµÄ½Ç¶È¡¢Ã«Å÷ÐÎ×´¡¢±Úºñ¡¢²ÄÁÏÓ²¶È¡¢ÈÈÅòÕ͵ȸöÒòËØ¡£Ó¦²ÅÓÃ×î½Ó½ü»òÕß±ê×¼»¯µÄ³ß´çÓÃÓÚÏÞÖÆÅäºÏÆ«²î¡£ Drawing Data ͼֽ²ÎÊý Internal Involute Spline Data External Involute Spline Data Flat Root Side Fit Number of Teeth xx Pitch xx/xx Pressure Angle 30¡ã Base Diameter x.xxxxxx Ref Pitch Diameter x.xxxxxx Ref Major Diameter x.xxx max Form Diameter x.xxx Minor Diameter x.xxx/x.xxx Circular Space Width Max Actual x.xxxx Min Effective x.xxxx The following information may be added as required: Max Measurement Between Pins x.xxx Ref Pin Diameter x.xxxx Flat Root Side Fit Number of Teeth xx Pitch xx/xx Pressure Angle 30¡ã Base Diameter x.xxxxxx Ref Pitch Diameter x.xxxxxx Ref Major Diameter x.xxx/x.xxx Form Diameter x.xxx Minor Diameter x.xxx min Circular Tooth Thickness Max Effective x.xxxx Min Actual x.xxxx The following information may be added as required: Min Measurement Over Pins x.xxxx Ref Pin Diameter x.xxxx The above drawing data are required for the spline specifications. The standard system is shown; for alternate systems, see Table 5. Number of x's indicates number of decimal places normally used.

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Exceptions:

a) The external major diameter, unless chamfered or reduced, may interfere with the internal form diameter on flat root side fit splines. Internal splines made to the 1957 and 1960 standards had the same dimensions as shown for the major diameter fit splines in this standard. ³ý·Çµ¹½Ç»ò¼õС³ß´ç£¬Í⻨¼ü´ó¾¶¿ÉÄÜÓëÆ½¸ù³Ý²àÅäºÏÄÚ»¨¼üÔÚ¡°½¥¿ªÏß¹¹³ÉÔ²¡±´¦²úÉú¸ÉÉæ¡£°´1957ºÍ1960°æÖÆÔìµÄÍâ¾¶ÅäºÏµÄÄÚ»¨¼ü£¬Óë±¾±ê×¼³ß´çÏàͬ¡£ b) For 15 teeth or less, the minor diameter of the internal spline, unless chamfered, will interfere with the form diameter of the external spline.

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c) For 9 teeth or less, the minor diameter of the internal spline, unless chamfered, will interfere with form diameter of the external spline.

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d) The internal minor diameter, unless chamfered, will interfere with the external form diameter.

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e) The internal minor diameter, unless chamfered, will interfere with the external form diameter.

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f) For 10 teeth or less, the minimum chamfer on the major diameter of the external spline may not clear the internal form diameter.

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g) Depending upon the pitch of the spline, the minimum chamfer on the major

diameter may not clear the internal form diameter.

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Drawing Data.¡ª It is important that uniform specifications be used to show complete information on detail drawings of splines. Much misunderstanding will be avoided by following the suggested arrangement of dimensions and data as given in Table 6. The number of x's indicates the number of decimal places normally used. With this tabulated type of spline specifications, it is usually not necessary to show a graphic illustration of the spline teeth.

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Spline Data and Reference Dimensions.¡ª Spline data are used for engineering and manufacturing purposes. Pitch and pressure angle are not subject to individual inspection. As used in this standard, reference is an added notation or modifier to a dimension, specification, or note when that dimension, specification, or note is: »¨¼ü²ÎÊýºÍ²Î¿¼³ß´ç¡££­»¨¼ü²ÎÊýÓÃÓÚ¹¤³ÌºÍÖÆÔì¡£¾¶½ÚºÍѹÁ¦½Ç²»¿ÉÒÔµ¥¶À¼ì²â¡£±¾±ê×¼ÖУ¬²Î¿¼³ß´çÊÇÒ»¸öÔö¼ÓµÄ·ûºÅ»òÐ޸ĵijߴ硢¹æ·¶»ò×¢½â£¬ÈçÏ£º 1) Repeated for drawing clarification. ʹͼֽ¸üÇåÎúÃ÷È·µØ±íʾ¡£

2) Needed to define a nonfeature datum or basis from which a form or feature is generated.

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3) Needed to define a nonfeature dimension from which other specifications or dimensions are developed.

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4) Needed to define a nonfeature dimension at which toleranced sizes of a feature are specified.

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5) Needed to define a nonfeature dimension from which control tolerances or sizes are developed or added as useful information.

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Any dimension, specification, or note that is noted ¡°REF¡± should not be used as a criterion for part acceptance or rejection. ÈκαêÃ÷Ϊ¡°²Î¿¼¡±µÄ³ß´ç¡¢¹æ·¶»ò×¢½â¶¼²»Ó¦µ±×÷ΪÁã¼þ½ÓÊÕ»ò¾ÜÊյıê×¼¡£

Estimating Key and Spline Sizes and Lengths.¡ª Fig. 3 may be used to estimate the size of American Standard involute splines required to transmit a given torque. It also may be used to find the outside diameter of shafts used with single keys. After the size of the shaft is found, the proportions of the key can be determined from Table 1 on page 2385.

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Curve A is for flexible splines with teeth hardened to Rockwell C 55¨C65. For these splines, lengths are generally made equal to or somewhat greater than the pitch diameter for diameters below 11?4 inches; on larger diameters, the length is generally one-third to two-thirds the pitch diameter. Curve A also applies for a single key used as a fixed coupling, the length of the key being one to one and one-quarter times the shaft diameter. The stress in the shaft, neglecting stress concentration at the keyway, is about 7500 pounds per square inch. See also Effect of Keyways on Shaft Strength starting on page 302.

ÇúÏßAÊÇÓÃÓÚ»¨¼ü³ÝÓ²¶ÈΪHRC55~65 ÈáÐÔ»¨¼ü¡£¶ÔÓÚÖ±¾¶µÍÓÚ1.25Ó¢´çµÄ»¨¼ü£¬ÕâЩ »¨¼üµÄ¼üµÄ³¤¶ÈÒ»°ãÖÆ³ÉµÈÓÚ»òÂÔ´óÓÚ½ÚÔ²Ö±¾¶£»¶ÔÓÚ´óÖ±¾¶µÄ»¨¼ü£¬»¨¼ü³¤¶ÈÒ»°ãΪ½ÚÔ²Ö±¾¶µÄ 1/3 µ½2/3¡£ÇúÏß A Ò²¿ÉÒÔÓÃÓÚÒ»¸ö¹Ì¶¨ÁªÖáÆ÷µÄµ¥¼ü¡£¼üµÄ³¤¶ÈÊÇÖá¾¶µÄ1µ½1 1/4±¶¡£ÖáÉϵÄѹÁ¦£¬²»¿¼ÂǼü²Û´¦µÄÓ¦Á¦¼¯ÖУ¬´óԼΪ7500°õÿƽ·½Ó¢´ç¡£¿É¼û´Ó302Ò³£¨Ô­¼þ£©¿ªÊ¼¡°¼ü²Û¶ÔÖáÇ¿¶ÈµÄÓ°Ï족¡£

Curve B represents high-capacity single keys used as fixed couplings for stresses of 9500 pounds per square inch, neglecting stress concentration. Key-length is one to one and one- quarter times shaft diameter and both shaft and key are of moderately hard heat-treated steel. This type of connection is commonly used to key commercial flexible couplings to motor or generator shafts.

ÇúÏß B ´ú±íʹÓÃÓڹ̶¨ÁªÖáÆ÷£¬Ó¦Á¦Îª 9500 °õÿƽ·½Ó¢´çµÄ¸ßÇ¿¶Èµ¥¼ü£¬²»¿¼ÂÇÓ¦Á¦¼¯ÖС£¼üµÄ³¤¶ÈÊÇÖá¾¶µÄ1µ½1 1/4±¶¡£ÖáºÍ¼ü¶¼ÊÇÖеÈÓ²¶ÈÈÈ´¦Àí¸Ö¡£ÕâÖÖÁ¬½ÓÐÎʽһ°ãÓÃÓÚÉÌÓÃÈáÐÔÁªÖáÆ÷Óëµç»ú»òÓë·¢µç»úµÄÖáÁ¬½Ó¡£

Curve C is for multiple-key fixed splines with lengths of three-quarters to one and one- quarter times pitch diameter and shaft hardness of 200¨C300 BHN.

ÇúÏß C ÓÃÓÚ³¤¶ÈΪ½ÚÔ²Ö±¾¶Îª 3/4 µ½ 1 1/4£¬ÖáÓ²¶ÈΪ200£­300HBµÄ¶à¼ü¹Ì¶¨»¨¼ü¡£

Curve D is for high-capacity splines with lengths one-half to one times the pitch diameter. Hardnesses up to Rockwell C 58 are common and in aircraft applications the shaft is generally hollow to reduce weight.

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Curve E represents a solid shaft with 65,000 pounds per square inch shear stress. For hollow shafts with inside diameter equal to three-quarters of the outside diameter the shear stress would be 95,000 pounds per square inch. ÇúÏßE´ú±í¼ôÇÐÓ¦Á¦Îª65000 °õÿƽ·½Ó¢´çµÄʵÐÄÖá¡£¶ÔÓÚÄÚ¾¶ÎªÍâ¾¶3/4µÄ¿ÕÐÄÖᣬ¼ôÇÐÓ¦Á¦Îª95000°õÿƽ·½Ó¢´ç¡£