Add Rack-Pinion - Ball-Screw

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Add Rack-Pinion - Ball-Screw

Add Rack and Pinion / Ball-Screw

See also Rack-Pinion dialog-box


Terminology

Rack -Pinion :

A Rack-Pinion is the term for a sliding, linear-gear (Rack) that is in mesh with a rotating, circular-gear (Pinion).

The motion of the two Parts are kinematically-related by the module and number-of-teeth on the Pinion.

Ball-Screw :

A Ball-Screw is a device in which a Screw rotates to move a Nut, or vice-versa. The Linear-Motion of the Nut and the rotation of the Screw are related by the lead of the screw-thread.  

tog_minusFurther Reading

Preparation (typical)

When the movement of the Rack will come from the Pinion (Driving Pinion)

MD-GA-RackPinion-Prep-0

Elements before you do Add Rack-Pinion

LineRed-14-1 - in a rotating-Part that is kinematically-defined

LineRed-14-2 - in a Sliding-Part that is not kinematically-defined

 

When the movement of the Pinion will come from the Rack (Driving Rack)

MD-DRIVINGRACK-PINION-0

Elements before you do Add Rack-Pinion

LineRed-14-1 - in a Sliding-Part that is kinematically-defined

LineRed-14-2 - in a Rotating-Part that is not kinematically-defined

 

Add Rack and Pinion

When the movement of the Rack comes from the Pinion (Driving Pinion)

MD-CM-AddRackPinion-00

STEP 1: Click Add Rack-Pinion

Add Rack-Pinion Ball-Screw icon

1.Add menu > Mechanism menu  > Add Rack-Pinion

- or -

1.Machine-elements toolbar > Add Rack-Pinion

In the Command-Manager, there are two elements to select.

STEP 2: Select the two elements in the graphic-area

1.Click LineRed-14-1 - it is in the Part that is kinematically-defined.

2.Click LineRed-14-2 - it is in the Part that is NOT kinematically-defined.

STEP 3: Complete the Command

1.Command-Manager: Click OK-tiny-11-15 to complete Add Rack-Pinion.


Result :

The Pinion is on the Rotating-Part.

The rotating-axis of the Pinion is coincident with the Pin-Joint.

The Rack is on the Sliding-Part.

The Rack is parallel with the Slide-Joint.

The Pitch-Line of the Rack is offset from the center of the Pinion by the Pitch-Circle Radius of the Pinion.

The Sliding-Part is now a Part that is kinematically-defined.

MD-GA-RackPinion-Prep-0
MD-CM-AddRackPinion-01

When the movement of the Pinion comes from the Rack (Driving-Rack)

MD-CM-AddRackPinion-00

STEP 1:Add Rack-Pinion

Add Rack-Pinion Ball-Screw icon

1.Add menu > Mechanism menu  > Add Rack-Pinion

- or -

1.Machine-elements toolbar > Add Rack-Pinion

In the Command-Manager, there are two elements to select.

STEP 2:Select the two elements in the graphic-area

2.Click LineRed-14-1 - it is in the Part that is kinematically-defined.

3.Click LineRed-14-2 - it is in the Part that is NOT kinematically-defined.

STEP 3:Complete the Command

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

The Rack-Pinion is now in the Assembly-Tree and Graphic-Area.


Result :

The Pinion is on the Rotating-Part.

The rotating-axis of the Pinion is coincident with the Pin-Joint.

The Rack is on the Sliding-Part.

The Pitch-Line of the Rack is parallel to the Slide-Joint and Sliding-Part.

The Rotating-Part is now a Part that is kinematically-defined.

MD-DRIVINGRACK-PINION-0
MD-DRIVINGRACK-PINION-1

Video of Add Rack-Pinion

 

Video: Add Rack-Pinion