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TIE ROD END DESIGN TUTORIAL Powers (转向横拉杆球铰接头设计教程)
TIE ROD END DESIGN
TUTORIAL
• THE FOLLOWING IS A SIMPLIFIED
STEP-BY-STEP GUIDE INTENDED TO
ILLUSTRATE THE DECISIONS AND
COMPROMISES INVOLVED IN
DESIGNING A TIE ROD END.
• THE PROCESS FOR DESIGNING ANY
BALL JOINT IS VERY SIMILAR
DESIGNING A ROD END FOR THE
20XX HYPTHETICAL LIGHT TRUCK
• FROM THE CUSTOMER WE LEARN:
– 1) PT 12 RELATIVE TO KNUCKLE 26.4MM
– 2) LOADS 7000 MAX, 4000 WORKING
– 3) PACKAGE NO ISSUES, 30MM FROM BRAKE
ROTOR DUST SHIELD
– 4) ARTICULATION TRAVEL +/- 18 DEGREES
– 5) MATING PARTS DETAIL CAST IRON 27MM
THICK, STUD UP, CASTLE NUT/COTTERPIN
– 6) APPLICATION COMMERCIAL LIGHT TRUCK,
RP W/ M16X 1.5 ROD
– 7) GREASABLE / NON-GREASABLE GREASABLE
BALL STUD DESIGN INPUTS
BALL
CENTER CAST IRON
27.0 MM
THICK
BOSS SURFACE
TO BALL CENTER
26.4MM
7000 LB. MAX
4000 LB WORKING
BALL STUD SHANK SIZING
• 7000 LB MAX LOAD
• 4000 LB WORKING LOAD
• 26.4MM CANTILEVER BEAM
• SHEAR-MOMENT
19.6MM
CALCULATION SHANK DIA
• 25% F.S.
BALL
• EFFECTIVE MATL ULT = CENTER
242KSI
• EFFECTIVE MATL YEILD =
129KSI
• = SHANK DIA = 19.6MM
TAPER SPECIFICATION
THREADS
BELOW 3 THREADS SHOWING
SURFACE WHEN NUT TIGHT
• STEEL BOSS WITH P.U.
– 1:8 TAPER
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