Mechanism | Add Bevel Gear-Pair

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Mechanism | Add Bevel Gear-Pair

Add Bevel Gear-Pair

See also: Gear-Pair dialog-box

What is a Bevel Gear-Pair?

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

The motion of a Driven-Gear is found 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.


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.

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 prepare to Add Bevel Gear-Pair is more complex than Add Gear-Pair. But we use the same command.

We can compare the model before we can do Add Gear-Pair and Add Bevel Gear-Pair.

The Mechanism-Planes of the two(2) Mechanism-Editors must intersect. They are frequently perpendicular to each other. For convenience, the we call the two Mechanism-Editors Mechanism-A and Mechanism-B.


Preparation A1: Mechanism A

LineRed-14-1 & LineRed-14-3 are in Parts that are kinematically-defined

LinesRed-14-1Red-14-2 are joined with a Pin-Joint

LineRed-14-2 has a dimension (in the Part-Editor)

See MD-Globe-www 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 LineRed-14-1 in the Base-Part

In the Add Plane dialog:

1.Click the Move Plane to end-PointRed-14-4 check-box

2.Enter 90º in the Rotate around the Z-axisRed-14-5

3.Enter 90º (default value) is in Rotate around the x-axisRed-14-6.

See MD-Globe-www Tutorial 1: Add a Rotating-Part.





Preparation A3: Add Mechanism-B to the new Plane

1.Click Model toolbar > Add Mechanism-Editor

2.Click the new PlaneRed-14-7

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

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

B) Right-click the Mechanism name-tabs Light-Bulb  > Click 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 PartRed-14-8

2.Click Kinematic elements toolbar > Add Pin-Joint

a.Click the start-Point of the new PartRed-14-10a

b.Click the end-PointRed-14-9 of the sketch Line in the Mechanism-A

The PartRed-14-8 will moves to a new place!!!

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

Add Bevel Gear-Pair


Mechanism-A is the active Mechanism-Editor - See Preparation above.

STEP 1: Click Add Gear-Pair


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

- or -

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

Red-14-1 The Line along the center of the rotating-Part

Red-14-2 The Line along the center of the Part in the Mechanism-B

Red-14-3 The Line in Base-Part



The Part-Editor opens to show LineRed-14-3 and its dimensionRed-14-4.

STEP 3: Click the center Distance Dimension Red-14-4

Red-14-4 Click the arrowhead, or the dimension line.


STEP 4: Complete the Command

Command-Manager: Click OK-tiny-11-15 in the Command-Manager.


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

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

All the Parts are kinematically-defined.

Bevel Gear Part 2 is now identified in the Kinematics-Tree as a Geared-Rocker

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