Insert a standard belt drive
Any referenced datasets can be downloaded from "Module downloads" in the module overview.
Transcript
00:04
Let's use the standard belt to define the required pulleys.
00:08
Calculate the proper location of an idler based on the belt length and insert a portion of the detailed belt in a drawing.
00:16
Not all standardized components are as convenient as bearings or fasteners that come in uniform sizes.
00:23
Objects like belts come in specific length, but you have to be able to make them fit in your design.
00:31
With the chain and belt tools, an AutoCAD Mechanical,
00:35
we can place sprockets for chains or pulleys for belts that have their geometry defined by the type of chain or belt that will be applied.
00:48
As you would expect from AutoCAD mechanical, there are a broad variety of standards available to you.
00:54
You'll need to select the standard and the number of teeth that you need.
00:58
Placing it into the drawing, you'll be offered an opportunity to hide any objects or create hidden lines,
01:05
then we'll place the other sprocket.
01:08
Right now, of course, we're not exactly sure about how the spacing will work with the number of teeth that we need for this belt.
01:15
You can also do a function for calculating the number of teeth based on the sprocket spacing you need.
01:28
Once the pulleys are in place, AutoCAD mechanical makes it easy to define the path of the belt.
01:34
For this drawing, we have the two pulleys, but we also have an idler that's put in place.
01:47
Selecting the belt with the number of teeth and the length that we need,
01:52
We'll tell it to automatically calculate how the idler needs to be positioned for this belt to fit in the design.
02:16
After the path has been established,
02:18
you can set the objects that need to be rotated and the center point and it will adjust the idler to fit a belt size that you can purchase.
02:31
And returning more to the craft of drafting,
02:33
we want to make it easier for people to understand what type of object is in the drawing.
02:42
Selecting a position to start and establishing a number of teeth you want to add to the belt, it will go ahead and draw this in.
02:49
Skipping the process of having to create any sort of block for the belt and using an array tool to try and go around this complex curvature.
03:05
AutoCAD Mechanical does a phenomenal job of combining the convenience of being able to leverage standards,
03:10
and the drafting tools you need to present these objects in a way that people can easily understand.
00:04
Let's use the standard belt to define the required pulleys.
00:08
Calculate the proper location of an idler based on the belt length and insert a portion of the detailed belt in a drawing.
00:16
Not all standardized components are as convenient as bearings or fasteners that come in uniform sizes.
00:23
Objects like belts come in specific length, but you have to be able to make them fit in your design.
00:31
With the chain and belt tools, an AutoCAD Mechanical,
00:35
we can place sprockets for chains or pulleys for belts that have their geometry defined by the type of chain or belt that will be applied.
00:48
As you would expect from AutoCAD mechanical, there are a broad variety of standards available to you.
00:54
You'll need to select the standard and the number of teeth that you need.
00:58
Placing it into the drawing, you'll be offered an opportunity to hide any objects or create hidden lines,
01:05
then we'll place the other sprocket.
01:08
Right now, of course, we're not exactly sure about how the spacing will work with the number of teeth that we need for this belt.
01:15
You can also do a function for calculating the number of teeth based on the sprocket spacing you need.
01:28
Once the pulleys are in place, AutoCAD mechanical makes it easy to define the path of the belt.
01:34
For this drawing, we have the two pulleys, but we also have an idler that's put in place.
01:47
Selecting the belt with the number of teeth and the length that we need,
01:52
We'll tell it to automatically calculate how the idler needs to be positioned for this belt to fit in the design.
02:16
After the path has been established,
02:18
you can set the objects that need to be rotated and the center point and it will adjust the idler to fit a belt size that you can purchase.
02:31
And returning more to the craft of drafting,
02:33
we want to make it easier for people to understand what type of object is in the drawing.
02:42
Selecting a position to start and establishing a number of teeth you want to add to the belt, it will go ahead and draw this in.
02:49
Skipping the process of having to create any sort of block for the belt and using an array tool to try and go around this complex curvature.
03:05
AutoCAD Mechanical does a phenomenal job of combining the convenience of being able to leverage standards,
03:10
and the drafting tools you need to present these objects in a way that people can easily understand.
Insert a belt drive - Exercise
- From the project files, open Belt Driven Gear Reducer 3.dwg.
- In the Content tab>Calculation panel, click the drop-down arrow next to Chains/Belts and select Sprocket/Pulley.
- In the Select Pulley and Sprocket dialog box, select Pulleys>Synchronous Belt pulley.
- To place the pulley in the drawing, at the Specify center of wheel prompt, select the center of the top circle, as shown below.
- At the Specify rotation angle prompt, press <Enter> to accept the default value of 0, as shown below.
- In the Synchronous Belt pulley dialog box, on the Size tab, select H 075 24 from the Size x No. of teeth list and click Next.
- On the Geometry tab, set the Number of Visible Teeth to 3 and the Shaft Diameter to .5, then click Finish.
- In the Hide Situation dialog box, verify that Display hidden lines is unchecked, as shown below, and click OK.
- In the Content tab>Calculation panel, click the drop-down arrow next to Chains/Belts and select Sprocket/Pulley.
- In the Select Pulley and Sprocket dialog box, select Synchronous Belt pulley.
- To place the pulley in the drawing, at the Specify center of wheel prompt, select the center point of the circle of HOLE 5:1 of the FRONT view of the STAND, as shown below.
- At the Specify rotation angle prompt, accept the default value of 0.
- In the Synchronous Belt pulley dialog box, on the Size tab, select H 075 48 from the Size x No. of teeth list and click Next.
- On the Geometry tab, set the Number of Visible Teeth to 3 and the Shaft Diameter to .75, then click Finish.
- In the Hide Situation dialog box, verify that Display hidden lines is unchecked and click OK.
- In the Content tab>Calculation panel, click the drop-down arrow next to Chains/Belts and select Length Calculation.
- In the Belt and Chain Length Calculation dialog box, ensure the New Tangent Definition between Sprocket/Pulley option is checked and the Belt option is selected, then click Library…
- In the Select a Belt dialog box, select Synchronous belt.
- In the Select Part Size dialog box, select the row with Belt length = 33, Thread Run-out = 0.16, Standard = 330H075 – ANSI/RMP IP-24, and Description = Synchronous belt (as shown below), and click OK.
- In the Belt and Chain Length Calculation dialog box, select Auto.Optimization and Rotation. Check the checkboxes for Sprocket/Pulley for Move/Rotation and Center Point for Rotation and click OK.
- For the first belt section, at the Specify 1st point for tangent prompt, select the upper-left quadrant of PULLEY 1:1 that you inserted earlier, as shown below.
- For the first belt section, at the Specify 2nd point for tangent prompt, select the upper-left quadrant of PULLEY 2:1 that you inserted earlier, as shown below.
- For the second belt section, at the Specify 1st point for tangent prompt, select the upper-right quadrant of PULLEY 2:1, as shown below.
- For the second belt section, at the Specify 2nd point for tangent prompt, select the lower-left quadrant of the BELT DRIVE:1, as shown below.
- For the third belt section, at the Specify 1st point for tangent prompt, select the upper-left quadrant of the BELT DRIVE:1, as shown below.
- For the third belt section, at the Specify 2nd point for tangent prompt, select the lower-left quadrant of the PULLEY 1:1, as shown below.
- With all three sections of the belt placed in the drawing, at the Specify 1st point for tangent prompt, right-click the mouse.
- At the Select pulleys or sprockets to be moved. Select objects prompt, select the two circles of BELT DRIVE:1, as shown below.
- To complete the task of selecting objects to be moved, right-click the mouse.
- At the Specify pivot point prompt, select the intersection of the two centerlines of HEX FLANGE SCREW – REGULAR THREAD – INCH 1:1, as shown below.
- If returned to the Belt and Chain Length Calculation dialog box, click Cancel to exit.
- In the Content tab>Calculation panel, click the drop-down arrow next to Chains/Belts and select Chain/Belt Links.
- In the Select Belt and Chain dialog box, select Belts.
- At the Select polyline prompt, select the top of the red polyline that represents the belt length that was just added, as shown below.
- At the Select starting point on polyline prompt, select the intersection of the top of the red polyline that represents the belt length and the vertical centerline, as shown below.
- In the BELTS dialog box, on the Size tab, ensure the 330H075 – ANSI/RMP IP-24 size is selected and click Next.
- On the Geometry tab, change the Number of Links to Draw to 50, then click Finish.
- At the Specify Direction of Links prompt, if the blue direction arrow is pointing to the left, choose the Flip option, as shown below.
- At the Specify Direction of Links prompt, if the blue direction arrow is pointing to the right, choose the Accept option, as shown below.
- At the Specify Orientation of Links prompt, and with the blue arrow pointing down, choose the Accept option, as shown in the image below.
- In the Hide Situation dialog box, verify that the Display hidden lines option is unchecked, then click OK.
- Save the drawing.
