文档介绍：齿轮模数试题(Gear modulus test)
helical gear meshing condition is correct mnl=mn2=mn, alpha nl= alpha n2= alpha, n beta 1=-
The pressure angle specified in the 2. standard is on the D.
A. base circle, B. addendum circle, C. root circle, D. dividing circle
The main failure form of 3. open gear drive is A_.
A. tooth surface abrasion and tooth root fracture, B. tooth surface abrasion and tooth surface pitting corrosion
Pitting of C. tooth surface and breaking of D. tooth root
is used only to support rotating parts without transmitting power, that is, bending and no torque acting on the shaft A,
A. spindle, B. shaft, C. drive shaft, D. optical axis
, the key link to transfer torque, by the role of B .
A. shear, B. shear and extrusion, C. twist, D. bend
Compared with gear drive, the 6. worm drive has the advantage of A.
single stage transmission ratio is big, compact structure,
drive ratio is not accurate, C. efficiency is high, D. material is expensive
The 7. axis often uses A for circumferential fixation.
A. key connect B. shoulder shaft C. sleeve D. fastening screw
, when the load is greater or has impact load, it is better to use C.
A. self-aligning bearing, B. deep groove ball bearings, C.
tapered roller bearings, D. thrust ball bearings
、 easy to process and widely used spline joint is A.
A. rectangular spline, B. involute spline, C. triangular spline, D. trape