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    AGMA 94FTM11-1994 Development of Transfer Gear Noise of 4X4 Transmission for Recreational Vehicles《大型旅游车4X4变速箱传动齿轮噪声的改进》.pdf

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    AGMA 94FTM11-1994 Development of Transfer Gear Noise of 4X4 Transmission for Recreational Vehicles《大型旅游车4X4变速箱传动齿轮噪声的改进》.pdf

    1、STD-AGMA 74FTMLL-ENGL 1774 W b87575 U4b3b 77b II by: Yoshiki Kawasaki Isuzu Motors, Japan x 94FTMll Development of Transfer Gear Noise of 4x4 Transmission for Recreational Vehicles TECHNICAL PAPER COPYRIGHT American Gear Manufacturers Association, Inc.Licensed by Information Handling ServicesDevelop

    2、ment of Transfer Gear Noise of 4x4 Transmission for Recreational Vehicles Yoshiki Kawasaki, Isuzu Motors, Japan Fe statements and opinions contained herein are those of the author and should not be construed as an officiai action or opinion of the Amezican Gear Manufacairers Associon1 ABSTRACT: in o

    3、ur Component Plant, we has been producing about 120, MUA 4 x4 transmission per year for our recreational vehicles since 1987. Transfer gear noise of MUA 4 x4 units have been one of the most severest customers claims, especially in the end of 1991. We have developed new methods to duce transfer gear

    4、noise, which consisi of gear development making use of tooth contact patterns, a new regrinding syskm for shaving cutters, quality conml by the Gear Laboratory Group, improvement activities for gear production processes and so on. By these developments extending for one year, we have succeeded in re

    5、ducing the reject rate from 4.5% to OS%, moreover improving the transfer gear noise rating from 4.0 - 6.0 to 8.0 - 10.0 by GM rating (table 1) in 1993. Copyright Q 1994 AmericanGearManAssociation 1500 King Street, Suite 201 Alexandria. Virginia 22314 October, 1994 ISBN. 1-555894464 COPYRIGHT America

    6、n Gear Manufacturers Association, Inc.Licensed by Information Handling Servicesc STD-AGMA 74FTMLL-ENGL 1794 b87575 0004b38 747 DEVELOPMENT OF TRANSFER GEAR NOISE OF A 4 x 4 TRANSMISSION FOR ECREATiONAL VEHICLES ISUZU MOTOIZS LIMITED, COMPONENT PiANT GEAR LABORATORY GROUP MGR Y. Kawasaki ASSIST. MGR

    7、k Hayaahi COMPONENT PIANT GEN. MGR T. Nishioka MANAGING DIRECTOR M. Shinoda (ISUZV Motai, iimited, 8 tauchidana Fyisawa-Shi, Eanagawa-ken Japan 8 252) 1. INTRODUCTION MUA 4 x 4 transmisaiona have been ptwfuced since 1987. Annual production volume of the transmisaions vaneci fran 100, to 120,w ao tha

    8、t aocumulated products have be- come 700,000 approximately. The part of the transfer gear box is aimoet the eame for both of the automatic transmissions and manual ames Concerning four wheel drive automobies, customers tend to complain about transfer gear noise in four wheel dricring. Geer nase in t

    9、wo wheel driving is not w aiticai for the customera Incidentally the transmisaions are not only installed in the domestic recreational vehiciq but du, hrve been shipped to a nai embly plant in Great Britain as vehicle wmpo- nents since 1991 with the vdume of 24 thousand units per Y- In Nov.91, a num

    10、ber of MUA units had been rejected in Great Britain because of unacceptable trnusfer gear nase with GM rating 3 - 4. (TAle 1) Same kinds of claime had been repolted in Japan and in the U.S.A. also. Therefore we have started respective improvement activities shown below since Mu.= 0 Cear deveiopment

    11、- Study of the ideal involute heliaid Impmrnent of simving 7 for gear noise reductiori - shaving cutter regrimding eystem - Quaiity control eystem for shaving 0 Eet so thst wed like to describe the contemte hereafter. VERY GOOD VERY BAD COPYRIGHT American Gear Manufacturers Association, Inc.Licensed

    12、 by Information Handling Services2 GEARDEVELOPMENT Fe.1 shows the gear train of the MUA 4 x 4 truiemiseion. Tbe hasvy b am thim fagwe ehow the toipue ow in fau- wild high lati0 thedore, ereh gear Ea thedorie, to make bira-in 4 gema, plunge iha- vhg Mitt- muet have vdle p-um anglea 3 COPYRIGHT Americ

    13、an Gear Manufacturers Association, Inc.Licensed by Information Handling Servicesi o-%- Rd Fig. 8 Eccentric cooieequently, the work gears come to have quite preciee geometry up to “Gear Cuttips Spec Charts“ dercribed later, aid 6dy idea developed involute helicoid Transmi.sioa gema are uaual)y carbur

    14、ized, which lerhs to heat-treatment dwtortion of gear teeth. Aa this distorto is not negligible, it must be studied becare. ving are determined according to (10 that aocurate damp poui- tionkg can be obtained The coolant control includes +utment of the direction and increaeing- coolaat mid 80 om The

    15、se impmvememt activities hape taken efect on precision impmvement of work from minmum AGMA-dace 5 - 7 to minimum AGMA-elass 6 - 8, nsmeiy efects by clasa one in AGMA standmr thuq bad gear p-eciaioa can be detected every shift, d causes of the tmuhhs wiU be sesrched (romptly, or example deteriomted m

    16、achinem, bad sion of fia, nu goal cutting tool set- up, misanangementa of proceas oder,etc 4 - 2 PROCESS IMPROVEMENT FOR GEAR MACHINING Heg are two examples of p-oc impvemeot 80 simple but very fluitfd. (i) sh (10 that ecceatriaty bwcr thin a) U m dta in bearing ao- In fad, this improvement was (10

    17、ahpie, but the effects were! quite imde(Fii.15). By thie count- this eceeatriaty becrme edler. (2) Gam Tranifer Input tmb cutting, dog tmth clmdmng, and fidiy Changed pmoer &was at tt ge.b.pilg, og tooth Though orighy the burra on the machkbgbawa by dog ge.hipns, th change of the procema order hd th

    18、e work oIij$n* the .oft piocese oder for this wan at nrit dog cutting, aldnn*llv &g tooth chamferins. tooth ChMlfeCing ad up the location precision in locritedprea.elying&?IW. Soeimpe y thin impnrpemeat dsq the P“Mm of work aimping. was much imprWea(Fq. 16). 5 COPYRIGHT American Gear Manufacturers A

    19、ssociation, Inc.Licensed by Information Handling Services.I I Fi. 15 Impmvement acvitka fa SbafkRr. Output 6 CONCLUSION Our organizmoo named “Geu Ldwatay Croup“ ia the most effective to improve and keep good qudity of produc- tion g- “Cear IAmmtay Group“ is a &es&ooai team dated to gear pmduccion(see FG. 17). Fig18 ahow the cesuit. of our improvement actipitig . himir ot Hit T-t Distortla . naLmII ot Gor GeCu.7 Tec)mloical kvel-t a Ga Rad 1-1 . kWlognt ot ta n 6 COPYRIGHT American Gear Manufacturers Association, Inc.Licensed by Information Handling Services


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