Notes
spline    [splain]n.花键
hub  [hQb]n.（轮）毂
expedient  [iks5pi:diEnt]adj.便利的，有利的，合适的
snip  [snip]v.剪断
Impede  [im5pi:d]v.阻碍，阻止
hexagonal  [hek`sA^EnEl]n.六角形的，六边形的
fillet  [5filit]n.（内）圆角，倒角
dowel  [5dauEl]n.（暗）钉，（定位）销；v.用（暗）销接合notch  [nCtF]n.槽口，凹口；v.刻凹痕，开槽
cotter  [5kRtE(r)]n.栓，（开口）销
retarder  [ri5tB:dE]n.减速器，延迟器
CHAPTER 6  DESIGN OF KEYS, SPLINES ([splain])
AND PINS ([pinz])
键、花键和销联接
Keys, splines ([splain])and  pins ([pinz]) ,
which apply very extensively, are used
on shafts to secure ([si5kjuE])rotating
elements, such as gears, pulleys
([5puliz]), or other wheels. Most of keys,
splines and pins have been
standardized. In this chapter the
selection and strength calculation of
straight ([streit])keys, splines and pins
will be introduced respectively.
键、花键和销主要用于固定轴上的旋转元
件，例如齿轮、滑轮以及其它的转子。它
们的的应用非常广泛。大多数键、花键和
销都已经标准化。本章将分别介绍平键、
花键和销的选择以及强度计算。
Explanation of Nouns：
Hub：the central part of a car wheel (or fan or propeller etc) through which the shaft or axle passes
Joints of shafts and hubs：To join the shafts and the hubs using some other elements.
The types of joints of shafts and hubs：keys, splines, pins, bolts, interference-fit joints, welding joints, riveted joints, bonded joints.
名词解释：
轮毂：旋转零件上包围轴的部分。
轴毂联接：借助于其它零件把轴和轮毂联接起来。
轴毂联接类型：键、花键、销、螺钉、过盈配合、焊接、铆接、粘结。
6.1    KEY JOINTS
键联接
A key is a fastening inserted into the keyway of two mating parts to prevent relative angular ([5AN^julE])or sliding motion between the parts. It is mainly employed to transmit ([trAnz5mit])torque from a shaft ([FB:ft])to a hub ([hQb])or vice versa.键是一种标准零件，通常用来实现轴与轮毂之间的周向固定以传递转矩，有的还能实现轴上零件的轴向滑动的导向。
Key joints Flat key joint Woodruff key joint Taper key joint Tangent key joint
The application of key joints
1.A fastening inserted into the keyway of two mating parts to prevent relative angular or sliding motion between the partspulleys
2.Transmitting torque from a shaft to a hub or vice versa
键联接的作用
1.实现零件的周向固定
2.传递扭矩
键联接平键联接半圆键联接楔键联接切向键联接

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