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and is not a direct example of the current chapter. Chapter 13 : Gear Trains l 441 Table 13.3. Table of motions.
Revolutions of elements
Step
No. Conditions of motion Arm A Compound
gear DE Gear B 1. Arm fixedcompound gear D  E
rotated through + 1 revolution ( i .e .
1 rev. anticlockwise) 0 +1 – TE
TB – TD
TC 2. Arm fixedcompound gear D  E
rotated through + x revolutions 0 +x – x× TE
TB –x × TD
TC 3. Add + y revolutions to all elements +y +y 4. Total motion +y x +y +y y –x× TE
TB Gear C +y y –x × TD
TC Since the gear B is fixed, therefore from the fourth row of the table, y –x×
∴ TE
=0
TB or y –x× 45
=0
75 y – 0.6 = 0 ...(i) Also the arm A makes 100 r.p.m. clockwise, therefore
y = – 100 ...(ii) Substituting y = – 100 in equation (i), we get
– 100 – 0.6 x = 0 or x = – 100 / 0.6 = – 166.67 Hydraulic or Pneumatic Speed
Change Actuator Ratio Detection Switches Round Housing With Oring
Seated Cooling Jacket Motor Flange Hollow Through Bore for
Drawbar Integration
OUTPUT External Spline to
Spindle INPUT
Spline to Accept
Motor Shaft Housing OD Designed to meet
RAM Bore Dia, and Share Motor
Coolant Supply Model of sun and planet gears. 442 l Theory of Machines From the fourth row of the table, speed of gear C, NC = y – x × 90
TD
= – 100 + 166.67 ×
= + 400 r.p.m.
30
TC = 400 r.p.m. (anticlockwise) Ans. 13.9. Compound Epicyclic Gear Train—Sun and Planet Gear
A compound epicyclic
gear train is shown in Fig. 13.9.
It consists of two coaxial shafts
S1 and S 2, an annulus gear A which
is fixed, the compound gear (or
planet gear) B C, the sun gear D
and the arm H. The annulus gear
has internal teeth and the compound gear is carried by the arm
and revolves freely on a pin of the
arm H. The sun gear is coaxial
with the annulus gear and the arm
but independent of them. Speed Change
Shift Axis
Bearing Housing
Output Belt Pulley The annulus gear A
meshes with the gear B and the Slide Dog
sun gear D meshes with the gea...
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 Fall '08
 CELGHORN

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