DRIVESHAFTS AND
UNIVERSAL JOINTS
CONSTRUCTION
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SEAMLESS STEEL TUBING
U-JOINTS AND YOKES
ONE OR TWO PIECE
EXTENSION OF TRANSMISSION
OUTPUT SHAFT
HAS NATURAL VIBRATION
TENDENCY
TYPES OF DRIVESHAFTS
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HOTCHKISS DESIGN
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TORQUE TUBE (REAR MOUNTED
TRANSAXLE)
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EXTERNAL SHAFT AND U-JOINTS
USED WITH LEAF OR COIL SPRINGS
ONE OR TWO PIECE
RIGIDLY CONNECTED AT BOTH ENDS
FLEXIBLE TUBE
DRIVESHAFT VIBRATION
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CAUSED BY: (BY DESIGN)
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TOO LONG OF A SHAFT
TOO SMALL DIAMETER
TOO MUCH DRIVESHAFT ANGLE
CRITICAL SPEED - SPEED WHEN IT
REACHES NATURAL FREQUENCY
DRIVESHAFT IMBALANCE
CONTINUED
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TO CORRECT IMBALANCE
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BALANCE WEIGHTS
CARDBOARD LINERS
RUBBER INSERTS (HELP NOISE TOO)
TUBE IN TUBE WITH RUBBER INSERTS
LINEAR STIFFNESS
FIBER COMPOSITE
INSPECTION OF
DRIVESHAFTS
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DENTED
BENT
UNDERCOATING
BALANCE PADS FALLEN OFF
BROKEN TRANS OR ENGINE
MOUNTS
U- JOINTS
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TYPES OF UNIVERSAL JOINTS
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SINGLE CARDAN JOINT
DOUBLE CARDAN UNIVERSAL JOINT
CONSTANT VELOCITY JOINTS
SLIP JOINTS
U-JOINTS PARTS
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CROSS (SPIDER)
FOUR MACHINED TUNNIONS
NEEDLE BEARINGS
DRIVEN AND DRIVING YOKES
SNAP RINGS INSIDE OR OUTSIDE
CAPS
U-BOLTS OR STRAPS
U-JOINT FACTORS
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ALLOWS ANGLE VARIATION OF
DRIVESHAFTS
SLIP JOINTS ALLOWS LENGTH
VARIATION
SPEED VARIATION OF JOINT IS A
FACTOR OF DESIGN
SPEED VARIATION
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NATURAL TENDENCY TO SPEED UP
AND SLOW DOWN TWICE DURING
ONE REVOLUTION
SPEED VARIATIONS MAY BE FELT
AS TORSIONAL VIBRATIONS
THE MORE THE ANGLE, THE MORE
THE VELOCITY WILL CHANGE EACH
REVOLUTION OF THE SHAFT
PHASING OF U-JOINTS
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TORSIONAL VIBRATIONS ARE
TRANSFERRED DOWN THE SHAFT
TO THE NEXT U-JOINT
TO CANCEL THIS VIBRATION, THE
SHAFT SHOULD HAVE TWO JOINTS
AND EQUAL AND SLIGHT ANGLES
TO EACH OTHER
CANCELING ANGLES
U-JOINT SERVICE
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MUST KNOW U-JOINT SIZE
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OUTSIDE YOKE SPAN
INSIDE YOKE SPAN