1、DEUTSCHE NORM March 1984 UDC 621.85.051.32 : 621.852.42.052.42 I Power transmission elements Grooved pulleys for narrow V-belts Dimensions, materials DIN 221 1 Part 1 Antriebselemente; Schmalkeilriemenscheiben; Masse, Werkstoff Supersedes August 1982 edition In keeping with current practice in stand
2、ards published by the International Organization for Standardization (ISO), a comma has been used throughout as the decimal marker. See Explanatory notes for connection with International Standard IS0 4183- 1980 published by the International Organization for Standardization (ISO). Dimensions in mrn
3、 1 Field of application This standard deals with grooved pulleys for narrow V-belts (hereinafter briefly referred to as pulleys) used in mechanical engineering. The pulleys specified in this standard are used for narrow V-belts conforming to DIN 7753 Part 1. They can also be used for V-beltsconformi
4、ng to DIN 2215 and DIN 2216 (see table 1). 2 Dimensions, designation The pulleys need not conform to the illustration; only the dimensions specified shall be adhered to. General tolerance: DIN 7168 - m For hub (boss) length 1: + IT 14 as defined in DIN 7151, lower deviation O. Rim shapes .$( dRT25-
5、dP) Single groove (Y Edges chamfered or radiused See figure 2 for run-out tolerances Figure 1 Multi-groove Other dimensions and data as for single groove rim. Figure 2. Continued on pages 2 to 10 Eeuth Verlag GmbH. Berlin 30. has eKciusive sale rights for German Standards (DIN-Normen) 12.84 Sales No
6、. 0108 DIN 22 1 1 Part 1 Engl. Price group Page 2 DIN 2211 Part 1 One piece (IT) pulley Hub always located flush with rim on one side. Tolerance zones for hub bore: - H7 for one piece (IT) pulleys; - U7 for two piece (21) pulleys. Other tolerance zones by agreement. Spoked pulley ar r in accordance
7、with DIN 748 Part 1 Figure 3. Solid pulley Webbed pulley Other dimensions and data as for one piece (IT) pulley. Figure 4. Two piece (2T) pulley Hub always located symmetrically to rim. Projecting Flush Recessed z = 8, hub 1) The nominal dimension desired for d2 shall be stated in the designation. D
8、IN 221 1 Part 1 Page 3 DIN 221 5 Symbols _ V-belt cross sections as in DIN 221 6 Symbols Datum width 6, *) Table 1. 10 13 17 22 10 13 17 22 8,5 11 14 19 DIN7753 Part 1 ISOsymbols I SPZ I SPA I SPB I SPC Narrow V-belt I cross sections as in Distances between grooves e 3), 4, _._ f 3). 7) _ _ _- Groov
9、e depth t 3) 34“ 38O a for datum diameter d, 5, Permissible deviation for a = 34“ and 38“ 12 50.3 15 +0,3 19 f0.4 25.5 k0.5 - - _ _ 8-106 10 0.6 12,5+0.8 17 1 11 +p 13,8 + 00 17,5 + :6 23.8 + $6 I 80 - 80 118 190 315 I lo -1 lo r lo k 30 I I 9,7 I 12,7 I 16,3 I 22 Rim width =(z- l)e+2f 5 I 64 1 80 I
10、 101 I 136 8 I 100 1 125 I 158 I 212,5 9 I 112 1 140 1 177 I 238 10 I 124 I 155 I 196 I 263.5 11 I 136 I 170 I 215 I 289 12 I 148 1 185 I 234 I 314.5 2) The datum width b, is the reference value for specifying the pulley groove profile. As a rule it is located at the level of the zone of action of t
11、he V-belt for which the pulley groove is intended. The datum width has previously been known as the working width (see Explanatory notes). 3) Calculated on the basis of the decisions made by ISO/TC 41 : c = 0.25 b, e z 1.35 b, fz 0,9 b, t = 1,25 b,. 4) The permissible deviation in the distance betwe
12、en grooves for the case of non-neighbouring grooves is double the values stated for e. e can be up to 3 mm greater for sheet metal pulleys and their pairs, and in exceptional cases. 5) The datum diameter d, is the diameter associated with the datum width b,; it is determinant in the calculation of t
13、he transmission ratio. The datum diameter has previously been known as the working diameter (see Explanatory notes). 6) No hub diameter specified. 7) Values other than those in table 1 may result for bz and fin the case of sheet metal pulleys and their pairs, and in exceptional cases. Page4 DIN 2211
14、 Part 1 Table 2. Datum diameter Datum diameter Datum diameters printed bold shall be preferred. Values printed in brackets are to be avoided where possible. The datum diameters d, shall be selected in accordance with table 2, datum diameters above 2000 mm shall be taken from the stand- ard number se
15、ries Fi 20. The datum diameter of the pulleys shall be selected to be as large as possible, taking the service life of the belt into consideration; however, a belt velocity of u = 40 mls for narrow V-belts and u = 30 m/s for classic V-belts should not be exceeded as the belts reach their optimum pow
16、er transmission at these velocities. 5) See page 3. *) To be measured with a dial gauge when the pulley is mounted on the bore: concentricity tolerance at the external diameter; run-out tolerance on the flank at the line of the datum diameter. 9, Grooves inspected in accordance with DIN 221 1 Part 2
17、. DIN 2211 Part 1 Page 5 I Number of grooves z 1 2 3 4 5 I Rim widthb2 I 16 28 I 40 I 52 I 64 Datum diameter I d2 I d2 1 d2 1 d2 1 dr d2 IT pulley rnax. mar. max. max. max. 1 50 20 28 56 20 28 _ - - 20 35 20 40 20 52 25 35 25 40 25 52 _- _ 32 32 38 40 42 45 48 52 48 60 52 48 60 32 32 38 40 42 45 48
18、32 32 38 40 42 45 48 52 48 60 45 48 - 52 50 60 32 42 45 48 50 48 52 55 60 _ _ _ _ - _ 32 38 40 42 _ - _- .- _. . _ _ -. . _ _ _ 300 42 45 48 50 48 52 55 60 63 25 28 25 25 71 25 -. 28 . -. _ .- 35 25 40 25 52 35 30 40 30 52 _ 55 55 55 60 55 64 450 500 55 55 55 60 60 64 _ _ 80 25 90 25 _ 28 30 35 38 4
19、0 38 52 28 30 35 38 40 38 52 _ Page 6 DIN 2211 Part 1 Table 4. Rim widths b2. hub dimensions d2 and 1 for narrow V-belt cross section SPA and classic V-belt 1 2 cross section 13 Number of grooves z I 3 4 5 I 20 I Rimwidthbz 35 50 65 80 Datum diameter IT pulley dr I 80 I 112 I 118 I 140 I 150 I 200 I
20、 400 I 450 I 500 DIN 2211 Part 1 Page7 Number of grooves2 1 2 3 4 Rim width b2 25 44 63 82 Datum diameter d2 1 d2 1 d2 1 d2 1 d* 1T 5 6 1 o1 120 d2 1 d2 1 Page8 DIN 2211 Part 1 Table 6. Rim widths b2, hub dimensions d2 cross section 22 and I for narrow V-belt cross section SPC and classic V-belt 160
21、 160 160 180 - 220 115 120 120 125 130 135 140 140 Number of grooves z 3141516 85 I 110,5 136 I 161.5 187 I 212,5 I 238 I 263.5 I 289 I 314.5 I - d2 nax JO 70 75 75 80 80 80 85 85 90 95 95 1 O0 105 - - - - _- - - - _ - _. _. . - - - 110 - 115 - 120 - 120 _ 125 - 130 - 135 - 140 - 140 - 145 - 150 - 1
22、55 - Datum diameter ill 1 lax. d2 rnax pulley pulley I 70 65 80 JO 65 80 80 JO 90 80 JO 90 90 75 100 90 75 100 100 80 100 100 80 100 - - .- 200 21 2 I 300 I 100 “t“f- 85 110 I 400 I 450 500 3 i iollq 11 5H 115120 125 200 200 200 200 200 500 560 O0 1151q 200 115PA 2001 1201lq 200 125H 200 l30p 200 14
23、01 1051 140 560 630 I I- -!Il !j 1201111 220 1201 220 i25n 220 1301; 220 nor 180 200 200 220 120 - 125 130 130-i35 20 220 220 220 2201 240 I I 630 I I 710 IIIIIIIIII I BOO I 160 115 160 II I 900 I 1601 120E O0 140 110 O0 t 140 110 900 1000 180 125 - I8O 130 - !20 i 1240 I I 1000 IPl20- I 1250 I ,op
24、!20 240 L 1250 I 1400 I _ 1600 - 2000 I 2000 DIM2211 Part 1 Page9 3 Material GG-20 in accordance with DIN 1691. Other materials by agreement. 4 Design Solid, webbed or spoked pulleys, at the manufacturers discretion. In the case of one piece (IT) pulleys the hub is flush with one side of the rim (hu
25、b datum edge), .e. one of the faces of the rim and the hub are located in the same plane, The other face of the hub is recessed, flush or projecting from the other face of the rim. In the case of two piece (2T) pulleys the hubs are always arranged symmetrically to the rim either projecting, flush or
26、 recessed on both sides (see figure). Fixing groove PN feather keyway as specified in DIN 6885 Part 1, high type (the feather keyway shall be offset by 90 to the parting line in the case of 2T pulleys). PN with threaded pin (adjusting screw) by agreement. pulleys). Position of the deepest point of t
27、he wedge keyway by agreement. KN wedge keyway as specified in DIN 6886 (the wedge keyway shall be located along the parting line in the case of 2T Balancing General: in one plane, quality level Q 16 as specified in VDI 2060 ford, 400 mm at u = 30 m/s or ford, 5 400 mm at n = 1500 Ihnin. Balancing is
28、 carried out without keyway on a smooth balancing mandrel. balancing as specified in VDI 2060, with keyway without feather, and/or in two planes. a) u 30 m/sor b) the ratio of datum diameter to rim width d, : b2 C4 with u 20/s. By agreement: Recommendation: in two planes, quality level Q 6,3 for the
29、 operating rotational speed, if Standards and other documents referred to DIN 748 Part 1 Cylindrical shaft ends; dimensions, nominal torques DIN 1691 Cast iron with lamellar graphite (grey cast iron) DIN 221 1 Part 2 Power transmission elements; grooved pulleys for narrow V-belts; inspection of groo
30、ves DIN 2215 Endless classical V-belts; dimensions DIN 2216 Cut classical V-belts; dimensions DIN 6885 Part 1 Drive type fastenings without retainer; high style feathers, keyways DIN 6886 Taper keys torque fastenings with retainer; wedges, keyways; dimensions and application DIN 7151 IS0 basic toler
31、ances for linear dimensions from 1 to 500 mm nominal dimension DIN 71 68 Part 1 General tolerances; linear and angular dimensions DIN 7753 Part 1 Endless narrow V-belts for mechanical engineering; dimensions VDI 2060 Scales for the assessment of the balance condition of rigid rotating bodies Other r
32、elevant standards DIN 748 Part 3 Cylindrical shaft ends for electrical motors DIN 2217 Part 1 Power transmission elements; grooved pulleys for classical V-belts DIN 2218 Endless classical V-belts for mechanical engineering; calculation of drive systems, power values DIN 7753 Part 2 Endless narrow V-
33、belts for mechanical engineering; calculation of drive systems, power values DIN 7753 Part 3 Endless narrow V-belts for automobile construction; dimensions Previous editions DIN 221 1 Part 1 : 06.67,02.74,08.82 Page 10 DIN 2211 Part 1 Amendments The following amendments have been made in comparison
34、with the August 1982 edition: a) Belt cross section 19 and reference to narrow V-belts for automobile construction as specified in DIN 7753 Part 3 has b) The term working width 6, has been amended to datum width 6, and the term working diameter d, has been been deleted. amended to datum diameter d,.
35、 Explanatory notes With the exception of the preference for the datum diameter d, for profiles SPZ, SPA and SPB and the permissible deviations for dimension f, the dimensions listed in tables 1 and 2 conform to International Standard IS0 4183- 1980 “Grooved pulleys for classical and narrow V-belts“.
36、 The dimensions of the grooves have been specified such that the classical V-belts conforming to DIN 2215 and DIN 2216 also fit in the grooves, at the upper widths IO, 13, 17 and 22 mm. In particular, the dimensions c and t have been specified in such a way that both all internationally standardized
37、 V-belts with the narrow profile and the corresponding classical V- belts can be used. The maximum and minimum dimensions for the datum diameter have been calculated from the nominal dimensions taking deviations of 2 8 % into consideration. As compared with the February 1974 edition and the August 1
38、982 edition, in this standard the terms “working width“ and “working diameter“ have been amended to “datum width“ and “datum diameter“ respectively. This follows the usage in International Standard IS0 1081 - 1980 “Terminology relating to drives using V-belts and grooved pulleys“. In that standard t
39、he width used to define the grooved pulley (a nominal value without tolerance) is now termed “datum width“. In contrast to this the working width of a V-belt was and is the width of the neutral layer, which remains un- changed when the belt is curved perpendicularly to the base of its cross section.
40、 The term “datum diameter“ has been introduced simultaneously with “datum width“. The amendments were made in order clearly to distinguish the datum width and datum diameter of a grooved pulley from its working width and working diameter, which are now only used to describe a V-belt and its position
41、 in a pulley groove and no longer as a basic definition of this pulley. By distinguishing the datum diameter from the working diameter in this way it is possible to avoid the terminological difficulties which occur when the defined datum width of the pulley groove does not coincide with the working
42、width of a V-belt running in the groove, .e. if the working zone of the belt is not at the level of the datum width in the groove. This should, however, not be the case with the grooved pulleys specified in this standard and the V-belts allocated to these pulleys. For this reason, the numerical valu
43、es for the present datum width and datum diameter have not been amended as compared with those for the previous operating width and diameter. The transmission ratio can also be calculated within the tolerances given using the values for the datum diameter. If the previously used terms “working width“ and “working diameter“ still occur in documentation relating to grooved pulleys for V-belts they are being used in the same way as the new terms “datum width“ and “daturn diameter“. International Patent Classification F 16 H 55-49
