Power Train Design

Team Gravity Light

Members: Yu Hui Lui, Yong Jie Lim, Randall Lenarz, Todd Heidrich, Travis Heidrich

For our application, our team developed a low torque high rpm power train that was designed to transmit power to a generator to power an LED light. The middle shaft transferred the power from the input shaft by a way of two helical gears and transferred that power to the output shaft by a way of two spur gears. The desired rpm’s output was 810rpm with a speed ratio (out/in) of 9. As a group throughout the semester, we developed our skills as future engineers. This final project gave us the chance to practice our collective multifaceted knowledge to develop a power train we are proud of. Thank you for a great semester! Have a great holiday and a MERRY CHRISTMAS to YOU !

1.43

0.43

1.33

R0.05 x 2

4.03

4.18

4.93

0.10

0.10

5.37

R0.350R0.30R0.25

0.08

0.08

Shaft 2, Shaft of Interest For Gravity LightAll Dimensions in Inches

Modeled by Randall LenarzShaft Material: AISI 4130 Steel Annealed at 865 °C

6

8 7 4

5 9

11

1

3

2

10

9

11

11

11

10

10

10

2.37

2.75 2.71

3.05 3.80

R0.05 X 2

6.40 7.20 7.30

7.35 7.39

7.73

1.50 1.50

ITEM NO. PART NUMBER DESCRIPTION QTY.

1 Housing 1

2 shaft 1 Not shaft of interest (dimensions unneeded) 1

3 Gear 1, Custom

Rush Gears, Helical, Helix Angle = 30, 33 teeth, Hub Diam = .7 in., Hub Length = .25 in., Steel, Bore Diam = .5 in., Keyway Width = .1 in., Keyway Depth = .08in. (Keyway as long

as gear)

1

4 Custom-Made Shaft, No Bearings Attached Dimensioned in Drawing for Second Shaft 1

5 Gear 2, Custom

Rush Gears, Helical, Transverse Pitch = 11, Pressure Angle = 14.5, Helix Angle = 30, 11

Teeth, Hub Diam = .7 in., Hub Length = .1 in., Steel, Bore Diam = .5in, Keyway Width = .1

in., Keyway Depth = .05 in. (Keyway Length of gear)

1

6 Gear 3, Custom

Rush Gears, Spur, Pitch = 11, Pressure Angle = 20, 33 Teeth, Hub Diam = .7 in., Hub Length = .25 in., Steel, Bore Diam = .5in, Keyway Width

= .1 in., Keyway Depth = .08 in. (Keyway length of gear)

1

7 Custom-made, includes roller-bearings. Not shaft of interest 1

8 Gear 4, CustomRush Gears, Spur, Pitch = 11, Pressure Angle = 20, 11 Teeth, Hub Diam = .7 in., Hub Length = .5in., Steel, Bore Diam = .5in, Keyway Width =

.1 in., Keyway Depth = .05 in.1

9 Inner P/N A4050, Outer P/N A4138

Timken TS Type Single-Row Tapered Roller Bearing 2

10 Bolt (FMW Fasteners Standard Part) Hex Bolts, SAE Grade 2 Steel, 3/4"-10 x 2" 4

11 Fastenal Part No. (SKU): 36554

3/4"-10 ASTM A194 2-H Plain Finish Heavy Hex Nut 4

Final Assembly

Randall Lenarz

WEIGHT:

A1

SHEET 1 OF 1SCALE:1:2

DWG NO.

TITLE:

REVISION: NewDO NOT SCALE DRAWING

MATERIAL:

DATESIGNATURENAME

DEBUR AND BREAK SHARP EDGES

FINISH:UNLESS OTHERWISE SPECIFIED:DIMENSIONS ARE IN MILLIMETERSSURFACE FINISH:TOLERANCES: LINEAR: ANGULAR:

Q.A

MFG

APPV'D

CHK'D

DRAWN

Element Length Moment Modulus Dist Load Dist Load Shear Moment M

(in.) (in.^4) (psi) (lb/in.) (lb/in.) (lb) (lb-in.)

1 0.25 0.003068 29730000 0 0 -2.1 0

2 0.375 0.003068 29730000 0 0 -2.1 0.5354

3 0.375 0.003068 29730000 0 0 -0.2418 1.34

4 0.05 0.003068 29730000 0 0 -0.2418 1.43

5 2.6 0.01179 29730000 0 0 -0.2418 1.44

6 0.05 0.003068 29730000 0 0 -0.2418 2.07

7 0.375 0.003068 29730000 0 0 -0.2418 2.08

8 0.375 0.003068 29730000 0 0 -4.9 -2.35

9 0.1 0.003068 29730000 0 0 -4.9 -0.4942

Node Concentra Concentra Specified Specified xy-plane Slope

(lb) (lb-in.) (in.) (radians) (in.) (radians)

1 0 0 0 0 0 1.659E-05

2 0 0 0 0 4.085E-06 1.585E-05

3 1.9 0 0 0 9.411E-06 1.2E-05

4 0 0 0 0 1.286E-05 6.31E-06

5 0 0 0 0 1.315E-05 5.523E-06

6 0 0 0 0 1.159E-05 -7.499E-06

7 0 0 0 0 1.119E-05 -8.637E-06

8 -4.7 -4.52 0 0 6.322E-06 -1.738E-05

9 0 0 0 0 1.136E-06 -1.154E-05

10 0 0 0 0 0 -1.127E-05

Slopes MD Solids xy-plane

MDSolids - Educational Software for Mechanics of Materials Copyright © 1997-2014 Timothy A. Philpot

Shear Moment M

(lb) (lb-in.)

2.1 -0.5354

2.1 -1.34

0.2418 -1.43

0.2418 -1.44

0.2418 -2.07

0.2418 -2.08

0.2418 -2.17

4.9 0.4942

4.9 0

MDSolids - Educational Software for Mechanics of Materials Copyright © 1997-2014 Timothy A. Philpot

MDSolids - Educational Software for Mechanics of Materials Copyright © 1997-2014 Timothy A. Philpot

Element Number Length

Moment of Inertia

of Elasticity

at Start

NodeDist Load at

End NodeShear Force V at Start Node

M at

Start Force V

at End M at End

Node(in.) (in.^4) (psi) (lb/in.) (lb/in.) (lb) (lb-in.) (lb) (lb-in.)

1 0.25 0.00307 3E+07 0 0 -6.1 0 6.1 -1.532 0.375 0.00307 3E+07 0 0 -6.1 1.53 6.1 -3.833 0.375 0.00307 3E+07 0 0 -0.9247 3.83 0.9247 -4.174 0.05 0.00307 3E+07 0 0 -0.9247 4.17 0.9247 -4.225 2.6 0.01179 3E+07 0 0 -0.9247 4.22 0.9247 -6.636 0.05 0.00307 3E+07 0 0 -0.9247 6.63 0.9247 -6.677 0.375 0.00307 3E+07 0 0 -0.9247 6.67 0.9247 -7.028 0.375 0.00307 3E+07 0 0 14.8 7.02 -14.8 -1.489 0.1 0.00307 3E+07 0 0 14.8 1.48 -14.8 0

Node Number

Concentrated

Force

Concentrated

Moment

Specified Deflectio

nSpecified

Slope XZ-plane Deflection Slope

xy-plane deflectio

ns

Total deflectio

n(lb) (lb-in.) (in.) (radians) (in.) (radians) inches inches

1 0 0 0 0 0 5.18614E-05 0 02 0 0 0 0 1.2791E-05 0.000049763 4.1E-06 1.3E-053 5.2 0 0 0 2.9681E-05 3.87464E-05 9.4E-06 3.1E-054 0 0 0 0 4.1171E-05 2.22957E-05 1.3E-05 4.3E-055 0 0 0 0 4.2228E-05 1.99945E-05 1.3E-05 4.4E-056 0 0 0 0 4.5784E-05 -0.000020232 1.2E-05 4.7E-05 <=== Maximum 7 0 0 0 0 4.4681E-05 -2.38765E-05 1.1E-05 4.6E-05 Deflection from MD Solids8 15.7 0 0 0 3.0495E-05 -5.20179E-05 6.3E-06 3.1E-059 0 0 0 0 7.0022E-06 -6.94824E-05 1.1E-06 7.1E-06

10 0 0 0 0 0 -7.02923E-05 0 0

FEA Maxium Deflection (in)

MD Solids Max Deflection (in) Percent Differnce (%)

4.34E-05 4.723E-05 8.17

Slopes MD solids xz-plane