![]() Differential Schematic |
These are more complex to model because they have two degrees-of-freedom. Differential Gears use two independent input drives to rotate a single output shaft. There are two standard variations:
If you take one as the input and one as the output, the effective gear ratio between them depends on the speed of the third gear. Differential Gears are frequently used:
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For information: this is the model after completion of this step. Profile Elements also added. |
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Steps 1 and 2 are complete.
Both Gear-Pairs use the CAD-Line along the centre of Part |
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Step 3 is not complete... The Point The Pin-Joint |
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The Select Element dialog-box opens.
This is why we select a 'Free' Point first. Point
Which Point do we select in the Select Elements dialog-box to complete Add Pin-Joint? We must select the Point7 in Part |
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To select the elements in the Select Elements dialog-box:
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Step 3 is complete |
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Step 4 is complete |
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Select the Cad-Lines in Parts Step 5 complete. Step 6 not complete. |
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Step 6 complete. |
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Edit: Number-of-Teeth and Module:
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We must now add a second Gear-Pair.
Step 9 is not complete... Point |
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The Select Element dialog-box opens.
This is why we select a 'Free' Point first. Point
Which Point do we select in the Select Elements dialog-box to complete Add Pin-Joint? We must select the Point7 in Part |
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To select the elements in the Select Elements dialog-box:
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Step 9 is complete.
With reference to the image:
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Step 10 is complete.
Remember: Double-click the Gear in the graphic-area. Edit: Number-of-Teeth Module and Mesh
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Step 11 is complete. |
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Steps 11,12,13 are complete Edit the Gear Ratio on the Gearing FBs Motion-Dimension 1 controls the speed of the Carrier Motion-Dimension 2 controls the speed of the Sun - see note (Note: Motion-Dimension 2 is relative to Motion-Dimension 1. Hence, a Gear Ratio of 0 given to Motion-Dimension 2 means the Sun rotates at the same speed as Motion-Dimension 1 not necessarily 0. To stop the rotation of the Sun, you must apply the negative Gear Ratio in the Gearing FBs. For example,1 and -1 in the Gearing FBs will make the Sun stationary. |