【正文】 ................................................................... I Chapter 1 Introduction......................................................................................... 1 Overview of automotive transmission ....................................................... 1 The purpose and significance of the automotive transmission design..... 2 Automotive transmission domestic and foreign situation and development trend.................................................................................... 2 The status of the transmission at home and abroad ....................... 2 The development trend of automobile transmission...................... 3 Manual transmission characteristics and design requirements and content ...................................................................................................... 4 Manual transmission characteristic ................................................ 4 The design requirements of the manual transmission ................... 5 The main content of the design....................................................... 6 Chapter 2 Transmission transmission layout program to determine .......... 7 The main technical parameters of the design is based on ........................ 7 Transmission transmission structure and form of selection ..................... 7 Analysis of characteristics of twoaxis transmission .................... 8 Intermediate shaft transmission characteristics of......................... 9 Reverse gear layout program analysis .......................................... 10 Transmission layout other issues ...................................................11 Parts structure program analysis .............................................................. 12 Gear in the form............................................................................. 12 Shift institutional forms ................................................................ 12 To prevent the automatic deblock structure................................ 13 Transmission bearings ................................................................... 14 This design transmission layout used in program ................................... 14 Chapter summary ...................................................................................... 16 VII Chapter 3 Choice and number of teeth allocation of transmission parameters ........................................................................................ 17 Each block of the transmission gear ratio to determins .......................... 17 The minimum transmission gear transmission ratio.................... 17 The other block transmission of the transmission ratio .............. 18 The determination of center distane......................................................... 19 Transmission dimensions of primaries .................................................... 19 Transmission gear selection of parameters.............................................. 20 Modulus.......................................................................................... 20 Tooth pressure angle and helix angle ........................................... 20 Tooth width .................................................................................... 21 Tooth top of the high coefficient .................................................. 22 Transmission of each block the distribution of the gear teeth................ 22 Determine the number of teeth of first gear................................. 22 Corrected to the center distance.................................................... 24 To determine the constant mesh gear teeth .................................. 24 To determine the gear number of teeth......................................... 26 Chapter summary ...................................................................................... 29 Chapter 4 The design of the tranmision gear.................................................. 30 The geometry of the transmission gear.................................................... 30 Calculate the transmission of torque and rotational speed of each axis 31 Gear strength calculations and material selection................................... 32 The caues and forms of gear damage ........................................... 32 Material selection of the gear........................................................ 33 Strength calculation of gears ......................................................... 34 Chapter summary ..................................................................................... 46 Chapter 5 Transmission shaft and bearing design calculations ................... 47 Primary transmission axis of the shaft diameter and axial length ......... 47 The structural design of the shaft............................................................. 48 The strength of the transmission axis ...................................................... 49 Gear and the shaft of the force calculation .................................. 49 Axis intensity calculate ................................................................. 50 VIII Shaft stiffness calculate................................................................. 55 Selection and verification of the transmission bearing........................... 59 Selection and verification of the first shaft bearing .................... 59 Selection and verification of the second shaft bearing................ 60 Selection and verification of the intermediate shaft bearings ..... 61 Chapter summary ...................................................................................... 61 Chapter 6 Synchronizer and the selection of the design of the control me chanism ..