MechDesigner Reference & User Interface > 2.2 Mechanism-Editor: > Machine elements

Add Bevel Gear-Pair

Add Bevel Gear-Pair and Degrees of Freedom

Add Bevel Gear-Pair removes one(1) degrees-of-freedom.

What is a Bevel Gear-Pair?

When you do Add Gear-Pair, you add two gears that are in mesh, with intersecting, parallel, rotating-axes.

When you do Add Bevel Gear-Pair, you add two gears that are in mesh, with intersecting, perpendicular, rotating-axes.

We find for you the motion of the Driven-Gear from the motion of the Driving-Gear, the number-of-teeth, and the mesh (internal or external).

Kinematics-Tree of Bevel Gear-Pair

Add Bevel Gear-Pair removes one degrees-of-freedom.

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Bevel Gear-Pair

Before you do Add Bevel Gear-Pair, there is a

•rotating-Part that is kinematically-defined, and a

•rotating-Part that has one degree-of-freedom in a different Mechanism-Editor

After you do Add Bevel Gear-Pair, the rotating-Parts are kinematically-defined.

A Bevel-Pair is a child to the Geared-Rocker.

Prepare Bevel Gear-Pair

To add Bevel-Gears is more complex than to add a standard Gear-Pair.

The Parts you add for the two Bevel-Gears are on two different Mechanism-Editors.

The Mechanism-Planes of the two(2) Mechanism-Editors must intersect. They are frequently perpendicular to each other.

Below, for convenience, the names of the two Mechanism-Editors are Mechanism-A and Mechanism-B.

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Preparation A1: Mechanism A

Line & Line are in Parts that are kinematically-defined

Lines are joined with a Pin-Joint

Line has a dimension (in the Part-Editor)

See Tutorial 1: Add a Rotating-Part.

Preparation A2: Add a Plane to the Line in the Base-Part

1.Click Model menu (or toolbar) > Add Plane

2.Click the Line in the Base-Part

In the Add Plane dialog:

1.Enable Move Plane to end-Point

2.Enter 90º in the Rotate around the Z-axis

3.Enter 90º (default value) is in Rotate around the x-axis.

See Tutorial 1: Add a Rotating-Part.

New Plane for Mechanism-B

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Preparation A3: Add Mechanism-B to the new Plane

1.Click Model toolbar > Add Mechanism-Editor

2.Click the new Plane

You jump to the new Mechanism-Editor - Mechanism-B

A) Enable Visibility toolbar > Show other Kinematic and Sketch elements

AND

B) Right-click the Mechanism name-tabs Light-Bulb > Enable Show with other Kinematic and Sketch-Elements

C) Spin the model to show the other kinematic and sketch-elements

Preparation B1: Add a new Part and Pin-Joint

1.Click Kinematic elements toolbar > Add Part | Drag to add the Part

2.Click Kinematic elements toolbar > Add Pin-Joint

a.Click the start-Point of the new Part

b.Click the end-Point of the Line in Mechanism-A

The Pin-Joint does not move the Points together.. The Part moves to a new place!!!

See also: Geared-Rocker, Dyads and Kinematics-Tree

Add Bevel Gear-Pair

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Note: Click Mechanism-A to make it the active Mechanism-Editor.

STEP 1: Click Add Gear-Pair

1.Mechanism-Editor: Add menu > Mechanism menu > Add Gear-Pair

1.Mechanism-Editor: Machine-elements toolbar > Add Gear-Pair

There are four elements to select in the Command-Manager.

STEP 2: Select the four elements

The Line along the center of the rotating-Part in Mechanism-A

The Line along the center of the rotating-Part in Mechanism-B

The Line in Base-Part

...

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The Part-Editor opens to show Line and its dimension.

...

Click the arrowhead, or the dimension line.

STEP 4: Complete the Command

Click in the Command-Manager.

Result:

The Bevel Gear-Pair is in the graphic-area.

The default Bevel Gear-Pair has an External Mesh and the gears have an equal number-of-teeth.

All Parts are kinematically-defined.

Bevel Gear Part is in the Kinematics-Tree as a Geared-Rocker.

To edit the Bevel-Gear-Pair parameters: see Gear-Pair dialog

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