1 / 12

INST 6150 Communication Instruction and the Learning Process

INST 6150 Communication Instruction and the Learning Process. INTRODUCTION TO GEARS. GEARS. Transmit motion between shafts Gear types Spur gears – parallel shafts – most common Bevel gears – perpendicular shafts Worm gears - perpendicular overlapping shafts

deliz
Download Presentation

INST 6150 Communication Instruction and the Learning Process

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. INST 6150Communication Instruction and the Learning Process INTRODUCTION TO GEARS

  2. GEARS • Transmit motion between shafts • Gear types • Spur gears – parallel shafts – most common • Bevel gears – perpendicular shafts • Worm gears - perpendicular overlapping shafts • Rack and pinion gears – convert circular motion to linear motion

  3. GEARS SPUR GEAR WORM GEAR BEVEL GEAR

  4. GEAR TERMINOLOGY • DIAMETRAL PITCH = “P” = Tooth size = # teeth per inch of pitch diameter • PITCH DIAMETER = “D” = Design diameter of gear if it were a smooth wheel • NUMBER OF TEETH = “N” = Total number of teeth on any given gear. Must be a whole number. • CENTER DISTANCE(Center-to-Center Distance) = Distance between centers of two mating gears • GEAR RATIO = Ratio of number of teeth on one gear to number of teeth on the mating gear

  5. OUTSIDE DIAMETER PITCH DIAMETER DIAMETRAL PITCH = TOOTH SIZE ROOT DIAMETER CENTERDISTANCE GEAR TERMINOLOGY

  6. D2 TANGENT PITCH CIRCLES D1 D1 + D2 2 CENTER-TO-CENTER DISTANCE = CC DIST MATING SPUR GEARS COMPARE TOOTH SIZES

  7. 18 TEETH = ? TEETH 1 INCH 2.25” 18 TEETH 2.25 INCHES P = = DIAMETRAL PITCH NUMBER OF TEETH PER INCH OF PITCH DIAMETER EXAMPLE: Gear has 18 teeth and a pitch diameter of 2.25”. Diametral Pitch (tooth size) = 18 teeth/2.25” = 8 P = 8

  8. NP D = THE GEAR DESIGN FORMULA (or N = DP, or P = N/D)

  9. GEAR RATIO Ratio of number of teeth on one gear to number of teeth on the mating gear Ratio = 9/18, or 1/2 Ratio = 25/18

  10. EXAMPLES A gear has 18 teeth (N) and a diametral pitch (P) of 8. What is its pitch diameter(D) ? 2.25” (2-1/4”) A gear has a pitch diameter (D) of 3.125” (3-1/8”) and a diametral pitch (P) of 8. How many teeth (N) does it have? 25 teeth Two mating gears have N = 30, P = 6, and N = 24, P = 6, respectively. What is the center distance? 4.50” (4-1/2”) Two mating gears have D = 3”, P = 7, and D = 5”, P = 7, respectively. What is the gear ratio? 21/35, or 3/5

  11. THE END CREDITS An I WANT MY M.A.W.W. production Producer - Inverted-Bird Productions Director - Dave “Deadeye” Manning Technical Consultants - Don “The Wrench” Wilson Kent “Flame” Walker Special Effects - AustinWorks Inc. Copywrong 2005 All Wrongs Reserved

More Related