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1、JIS JAPANESE I N DU STR I AL STANDARD Translated and Published by Japanese Standards Association JIS B 1603 : 1995 (Reaffirmed : 2001) Straight cylindrical involute splines-side fit-Generalities, dimensions and inspection ICs 21.200 Descriptors : involute splines, gear drives Reference number : JIS
2、B 1603 : 1995 (E) PROTECTED BY COPYRIGHT 172 B 1603 : 1995 Foreword This translation has been made based on the original Japanese Industrial Standard established by the Minister of International Trade and Industry through deliberations at the Japanese Industrial Standards Committee in accordance wit
3、h the Industrial Standardization Law: Date of Establishment: 1995-03-01 Date of Public Notice in Official Gazette: 1995-03-01 Investigated by: Japanese Industrial Standards Committee Divisional Council on Machine Elements JIS B 1603: 1995, First English edition published in 2002-06 Translated and pu
4、blished by: Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo, 107-8440 JAPAN In the event of any doubts arising as to the contents, the original JIS is to be the final authority. O JSA 2002 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
5、 or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Printed in Japan PROTECTED BY COPYRIGHT -,-,- JAPANESE INDUSTRIAL STANDARD JIS B 1603 : 1995 Straight cylindrical involute splines- side fit-Gen
6、eralities, dimensions and inspection Forward for Japanese Industrial Standard This Japanese Industrial Standard has been prepared based on the first edi- tion of IS0 4156 Straight cylindrical involute splines-Metric module, side fit- Generalities, dimensions and inspection published in 1981 without
7、modifying the technical contents. Addition the specification contents of the conventional JIS D 2001, which have been applied, are stated in a compact form in the annex to this Standard. The portions indicated with dotted lines are the matters not stated in the original International Standard. Secti
8、on one : Generalities 1 Scope and field of application This Standard provides data and guidance for the design, manufacture and inspection of straight (non-helical) cylindrical involute splines with side fit (hereafter referred to as “splines”). It establishes a specifica- tion based on the module w
9、ithin the range 0.25 to 10 inclusive, relating to nominal pressure angles of 30”, 37.5” and 45”. (For electronic data processing purposes, the form of expression “37.5” has been adopted instead of 37” 30.) Limiting dimensions, tolerances, manufacturing errors and their effects on the fit between con
10、necting Co-axial spline elements are defined and tabulated. Linear dimensions are expressed in millimetres and angular dimensions in degrees. i Informative references: The corresponding standards to this Standard are as fol- i lows. IS0 3 Preferred numbers-Series of preferred numbers i JIS Z 8601-19
11、54 Preferred numbers is equivalent to the i said standard. ISOfR286 IS0 system of limits and fits-Part 1 : General, tolerances and deviations JIS B 0401-1986 IS0 system of limits and fits is equiva- i lent to the said standard. IS0 286 IS0 system of limits and fits JIS B 0401-1986 IS0 system of limi
12、ts and fits is equiva- i lent to the said standard. IS0 1328 Parallel involute gears-IS0 system of accu- i racy ISOLR1938 IS0 system of limits and fits-Part 2 : Inspec- j tion of plain workpieces PROTECTED BY COPYRIGHT -,-,- 2 B 1603 : 1995 IS0 3670 Blanks for plug gauges and handles (taper lock and
13、 trilock) and ring gauges-Design and gen- eral dimensions 2 Terms and definitions relating to splines 2.1 spline joint : Connecting, Co-axial elements that transmit torque through the simultaneous engagement of equally spaced teeth situated around the periphery of a cylindrical external member with
14、similar spaced mating spaces situated around the inner surface of the related cylindrical internal member. 2.2 involute flank profiles. involute spline : One member of spline joint having teeth or spaces that have 2 . 3 internal spline : A spline formed on the inner surface of a cylinder. 2.4 extern
15、al spline : A spline formed on the outer surface of a cylinder. 2.5 fillet : The concave surface of the tooth or space connecting the involute flank and the root circle. This curved surface as generated varies and cannot be properly specified by a radius of any given value (see figure 12). 2.6 fille
16、t root spline : A spline having a tooth or space profile in which the op- posing involute flanks are connected to the root circle (Dei or De diameter) by a single fillet (see figure 13). . 2.7 flat root spline : A spline having a tooth or space profile in which each of the opposing involute flanks a
17、re connected to the root circle (Dei or Die diameter) by a fillet (see figure 12). 2.8 module, m : The ratio of the circular pitch, expressed in millimetres, to the number x (or the ratio of the pitch diameter, expressed in millimetres, to the num- ber of teeth). 2.9 pitch circle : The reference cir
18、cle from which all normal spline dimensions are derived, and the circle on which the specified pressure angle has its nominal value. 2.10 pitch diameter, D : The diameter of the pitch circle, in millimetres, equal to the number of teeth multiplied by the module (see . figure 12). 2.11 pitch point :
19、(see reference figure 1). The intersection of the spline tooth profile with the pitch circle 2.12 circular pitch, p : A length of arc of the pitch circle between two consecu- tive pitch points of left- (or right-) hand flanks, which has a normal value of the number n multiplied by the module (see fi
20、gure 12). 2.13 any point on a tooth flank and the tangent plane to the flank at that point. pressure angle, a : The acute angle between a radial line passing through PROTECTED BY COPYRIGHT -,-,- 3 B 1603 : 1995 2.14 standard pressure angle, CXD : The pressure angle at the specified pitch point (see
21、reference figure 1). . 2.15 base circle : The circle from which involute spline tooth profiles are gener- ated. 2.16 base diameter, D b : The diameter of the base circle. 2.17 base pitch, P b : The arc length of the base circle between two consecutive corresponding flanks. 2.18 major circle : The ci
22、rcle formed by the outermost surface of the spline. It is the outside circle (tooth tip circle) of the external spline or the root circle of the internal spline. 2.19 major diameter, D e e , Dei : The diameter of the major circle (see figure 12). 2.20 minor circle : The circle formed by the innermos
23、t surface of the spline. It is the root circle of the external spline or the inside circle (tooth tip circle) of the inter- nal spline. 2.21 minor diameter, Die, D i ; : The diameter of the minor circle (see figure 12). . 2.22 form circle : The circle which establishes the deepest points of involute
24、 form control of the tooth profile. This circle along with the tooth tip circle (or start of chamfer circle) determines the limits of tooth profile requiring control. It is located near and below the major circle on the internal spline and near and above the minor circle on the external spline. 2.23
25、 form diameter, D F e , D F i : The diameter of the form circle (see figure 12). . 2.24 depth of engagement : The radial distance from the minor circle of the in- ternal spline to the major circle of the external spline, minus corner clearance and/ or chamfer depth (see reference figure 2). 2.25 bas
26、ic (circular) space width or tooth thickness at the pitch diameter, E or S : For 30“, 37.5“ and 45“ pressure angle splines, half the circular pitch (see figure 12) Informative reference : Unless otherwise indicated, the basic (circular) space width and basic tooth thickness are the the pitch diamete
27、r, 2.26 actual space width : The practically measured circular space width, on the pitch circle, of any single space width within the limit values E,. and Emin, (see fI;gure. 12). 2.27 effective space width, E, : For an internal spline, equal to the circular tooth thickness on the pitch circle of an
28、 imaginary perfect external spline which would fit the internal spline without looseness or interference, considering engagement of the entire axial length of the splinted assembly. The minimum effective space width (Evmin., always equal to E) of the internal spline is always basic, as shown in tabl
29、e 1. PROTECTED BY COPYRIGHT -,-,- 4 B 1603 : 1995 Fit variations may be obtained by adjusting the tooth thickness of the external spline (see figure 121. 2.28 actual tooth thickness : The practically measured circular tooth thickness, on the pitch circle, of any single tooth within the limit values
30、S,. and Smin. (see ._ _ _ figure 12). . 2.29 effective tooth thickness, S, : For an external spline, equal to the circular space width on the pitch circle of an imaginary perfect internal spline which would fit the external spline without looseness or interference, considering engagement of the enti
31、re axial length of the splined assembly. Fit variations are obtained by ad- justing this value S, (see figure 12). 2.30 effective clearance, c, (looseness or interference) : The effective space width of the internal spline minus the effective tooth thickness of the mating external spline (see refere
32、nce figure 2). 2.31 theoretical clearance, c (looseness or interference) : The actual space width of an internal spline minus the actual tooth thickness of the mating external spline. It does not define the fit between mating members, because of the effect of varia- tions (see reference figure 2). 2
33、.32 form clearance, CF : The radial depth of involute profile beyond the depth of engagement with the mating part. It allows eccentricity of the minor circle (inter- nal), of the major circle (external and of their respective pitch circle (see figure 12). 2.33 total index variation : Amount of absol
34、ute values of the two greatest ac- tual (or practically measured) positive and negative variations from the theoretical spacing (see figure 9). 2.34 total profile variation : Amount of absolute values of the two greatest positive and negative variations, from the theoretical tooth profiles, measured
35、 normal to flanks (see figure 18). 2.35 total lead variation : Amount of absolute values of the two greatest oppo- site direction variations, from the theoretical direction (parallel to the datum axis), also including parallelism and alignment variations (see figure 1). Note : Straight (non-helical)
36、 splines have an infinite lead. 2.36 parallelism variation : The variation of parallelism of a single spline tooth to any other single spline tooth (see figure 1). 2.37 alignment variation : The variation of the effective spline axis with respect to the reference axis (see figure 1). Informative ref
37、erence : The effective spline axis is the ideal axis determined by effective tooth thickness and effective space width. . 2.38 out-of-roundness : The variation of the spline from a true circular configu- ration. PROTECTED BY COPYRIGHT -,-,- 5 B 1603 : 1995 2.39 effective variation : The accumulated
38、effect of the spline variations on the fit with the mating part. 2.40 variation allowance, A : The permissible effective variation; 2.41 machining tolerance, T : The permissible variation in actual space width or actual tooth thickness. 2.42 total tolerance, (T+A) : The machining tolerance plus the
39、variation allow- ance. The total tolerance on an internal spline is the difference between the mini- mum effective space width and the maximum actual space width; on an external spline, it is the difference between the maximum effective tooth thickness and the minimum actual tooth thickness. 2.43 le
40、ngth of engagement, gr: The axial length of contact between mating splines (see figure 17). . 2.44 active spline length, gw : The maximum axial spline length in contact (with working) with the mating spline. On sliding splines, the active length exceeds the length of engagement (see . figure 17). 2.
41、45 basic dimension : A numerical value to describe the theoretically exact size, shape or location of a feature. It is the basis from which permissible variations are established by tolerances. 2.46 auxiliary dimension : A dimension, without tolerance, given for informa- tion purposes only, for the
42、determination of the useful production and control di- mensions. Standard pressure angle Il Informative reference figure 1 Actual clearance Effective clearance Informative reference figure 2 PROTECTED BY COPYRIGHT 6 B 1603 : 1995 Datum axis 2 (i) Lead variation Centrelines Datum axis I - tooth -_ (2
43、) Parallelism variation Effective spline axis I Datum axis 1 (3) Alignment variation Figure 1 Total lead variation 3 Symbols 3.1 terms and dimensions are given below (see figures 11, 12, 13, 14 and 15). General symbols The general symbols used to designate the various spline Note : In electronic dat
44、a processing (EDP), it is not always possible to present symbols in their theoretically correct form because of limitations of connected printing equipment. For this reason, some alternative sym- bols for EDP usage are given in brackets below (for example, the sym- bol D h for base diameter may be p
45、rinted as DB). cv = effective clearance (looseness or interference) CF = form clearance D = pitch diameter D b DBI =base diameter d,i = pin contact diameter, inter- D F DFI =form diameter, internal Dii DIII =minor diameter, internal Dei DEI =major diameter, internal E is the basic space width in mil
46、limetres; S is the basic tooth thickness in millimetres. the resultant (T+ 1) in micrometres. For (T+ 1) in millimetres, multiply the result by 0.001. For the calculation of tolerance units (i), only the above indicated formu- lae (notes *, *) are to be taken into consideration. It should to be note
47、d that total values (T+4 may always be subtracted from the limit values of space width and tooth thickness given in section 2 and are usable even if the chosen fit class is other than Hh. Below are listed the combinations of tolerance qualities IT correspond- ing to the combinations of tolerance uni
48、ts (i) indicated above. Those com- binations of tolerance qualities IT are given only to indicate the conception principle of the tolerance system regarding its eventual ex- tension, and only to rediscover the corresponding combinations of tol- erance units (i). Spline tolerance class Note : Toleran
49、ce quality (IT) 4 = (IT6* + IT9*) 5 = (IT7* + IT10*) 6 = (IT8* + ITll*) 7 = (IT9“ + IT12*) Note * Tolerance based on pitch diameter. * Tolerance based on space width and tooth thickness. PROTECTED BY COPYRIGHT 14 B 1603 : 1995 7 Basic rack profiles for spline 7 . 1 The basic rack is a section of the tooth surface of an involute spline of infi- nitely large dia