Gears, Chains, and Sprockets - VEX Robotics

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Technical OverviewThe following Autodesk Inventor tools are used in this phase.Icon Name DescriptionSpur GearGeneratorWork PlaneCalculates dimensions and checks strength of external and internalgearing with straight and helical teeth. It contains geometriccalculations for designing different types of correction distributions,including a correction with compensation of slips.Use work planes when creating axes, sketch planes, or terminationplanes, or to position cross-sectional views or cutting planes.Use a work plane:■■When a part face is not available as a sketch plane for sketching newfeatures.When an intermediate position is required to define other workplanes (for example, at an angle to a face at an offset distance).2D SketchProjectGeometryCenter PointCircleGeneralDimensionTwo PointRectangleVerticalConstraintHorizontalConstraintEqualConstraintFilletMirrorA sketch consists of the sketch plane, a coordinate system, 2D curves,and the dimensions and constraints applied to the curves.Projects geometry (model edges, vertices, work axes, work points, orother sketch geometry) onto the active sketch plane as referencegeometry.Creates a circle from a center point and radius, or tangent to three lines.Adds dimensions to a sketch. Dimensions control the size of a part. Theycan be expressed as numeric constants, as variables in an equation, orin parameter files.Used to create rectangles two ways: specifying diagonal corners orspecifying length and width. Each rectangle side is a line segment.A geometric constraint that positions selected lines, ellipse axes, orpairs of points parallel to the Y-axis of the sketch coordinate system(same X coordinate).The horizontal constraint causes lines, ellipse axes, or pairs of points tolie parallel to the X axis of the sketch coordinate system.A geometric constraint that causes selected arcs and circles to have thesame radius or selected lines to have the same length.Placed features that round off or cap interior or exterior corners orfeatures of a part.Use to mirror sketch geometry across a centerline.20■Unit 6: Gears, Chains, and Sprockets
Icon Name DescriptionRectangularPatternChamferiFeaturePart, surface, and assembly features can be arranged in a pattern torepresent hole patterns or textures, slots, notches, or other symmetricalarrangements.Chamfers bevel part edges in both the part and assemblyenvironments. Chamfers may be equal distance from the edge, aspecified distance and angle from an edge, or a different distance fromthe edge for each face.An iFeature is one or more features that can be saved and reused inother designs. You can create an iFeature from any sketched featurethat you determine to be useful for other designs. Features dependenton the sketched feature are included in the iFeature. After you create aniFeature and store it in a catalog, you can place it in a part by draggingit from Windows Explorer and dropping it in the part file or by using theInsert iFeature tool.Required Supplies and SoftwareThe following software is used in this phase.SoftwareAutodesk Inventor Professional 2009About Generating GearsThe gear generators in Design Accelerator enable you to add gear models to your designs by enteringdata in a table format, and then validating your entries prior to producing the gear set. The geargenerators automate the gear design process and reduce the time required to sketch and modelgear data.The gear generators are designed so that you can add general information regarding the type of gearset selected and then provide data for the individual gears. At any time during this process, you cancalculate the current data, preview the gear set in the graphics window, and review the calculationsfor possible issues.Create Phase■21
Page 3 and 4: SuppliesSoftwareAn assembled the ge
Page 5 and 6: PhaseBuildStandardScience (NSES)Uni
Page 7 and 8: Think PhaseOverviewThis phase expla
Page 9 and 10: Spur GearsSpur gears have been used
Page 11 and 12: The driving torque applies some for
Page 13 and 14: Idler GearsGears can be inserted be
Page 15 and 16: Compound Gear RatioCompound gears a
Page 17 and 18: Chain DrivesSprockets and chains ar
Page 19: Create PhaseOverviewThis phase desc
Page 23 and 24: Example: Generated GearsIn the foll
Page 25 and 26: Enter data to design the gear set.I
Page 27 and 28: Exercise: Generate Spur GearsIn thi
Page 29 and 30: 12. To check your design again, cli
Page 31 and 32: 9. Press E to start the Extrude too
Page 33 and 34: 4. For Operation, select Cut.2. Exp
Page 35 and 36: 14. Click OK.3. Click again to crea
Page 37 and 38: Extrude the Sketch on the Back Face
Page 39 and 40: 7. For Count, enter 5.8. For Spacin
Page 41 and 42: Insert an iFeatureIn this section o
Page 43 and 44: Exercise: Animate a Gear AssemblyIn
Page 45 and 46: 9. Scroll back to SHAFT-3000:5. Rig
Page 47 and 48: Required Supplies and SoftwareThe f
Page 49 and 50: 2. To complete the next step:■■
Page 51 and 52: 4. To complete the next step:■■
Page 53 and 54: Amaze PhaseOverviewIn this phase, y
Page 55 and 56: f. Set up the test stand between tw
Page 57 and 58: Figure 4: 36:60 ReductionFigure 5:
Page 59 and 60: STEM ConnectionsBackgroundThe Unite

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