AutoCAD Inventor :: Modelling Bicycle Gears
Nov 5, 2012
How can I create bicycle gears that have different numbers of teeth but all have an inter tooth distance (distance between the teeth centres) of 12.7mm?
My attempt at a solution and problems encountered:
I made a bicycle gear by patterning a small circle around a large circle then trimming lines (see attached sketch), but this method requires me to estimate the diameter of the large circle before patterning and then keep modifying this slightly until I get an intertooth distance as close as possible to 12.7mm. So I can't get exactly 12.7mm. In my sketch I have labelled this intertooth distance I refer to by construction lines.
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Dec 6, 2011
I created a mold design of bicycle frame. when i generated core and cavity, i faced some problems.
it said,
1. there are small gaps between these edges (edge set 1, maximum gaps is 25.16917 mm. edge set 2, maximum gaps is 25.16917mm)
2. runoff surfaces penetrate the porduct (surface 1, surface 2, until surface 6)
below this post i attach the file.
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May 4, 2012
Is there a way to create 3d objects in Inventor without having to 'sketch' in 2d first? Such as draw a vertical 3Dcylinder simply by defining its radius and height, without extruding?
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Aug 9, 2012
how to model a leather covering for some furniture I am designing. Do I treat the leather sheet like sheet metal and use the sheet metal tools (I have not used this feature yet)? That way I can flatten it out to get a pattern.
Or do I treat it like a plastic moulding (again I have not used this feature)? A plastic moulding would give me a visual model but I would not be able to get a pattern from it.
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Feb 6, 2012
I have to create a hollow model of an aircraft. Most of it is reasonably straight forward, however, I am having real problems modelling the nose and cockpit area due to the inconsistency of the shape from the cabin towards the nose of the aircraft.
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Aug 7, 2013
We are a transport engineering firm in Queensland and I would like to develop a spreadsheet that can formulate cross member distances and recalculate to add or remove cross members.
The basis of this is the overall size of the body we are building.
For example: The maximum width of a body in Australia is 2.5metres overall. Our cross members would be 6 mm shorter than the overall width of the body to allow for 3mm end caps to cover the open ends of the cross members. So the length of the cross member is width minus 6, or , parametrically the length is (overall width - (endcap thickness x2))
The body length is the tricky one. We have a maximum spacing on the cross members. This will vary from size of body to size of body. EG the spacing on the small 2 tonne body will be different to the spacing on the 12 tonne body etc. So lets say we want to have maximum spacing of 450mm and a minimu spacing of 300mm between centrelines of the cross members. The overall length of the body will also determine the number of cross members required.
On top of this there is the front and rear coaming to take into consideration.
So the formula would be ((overall length - front coaming - rear coaming) divided by cross member spacing)) then a check to see if the last space is what and then can we change the cross member size to take up that space without going over the maximum space. We would also need to take into account the width of the cross member section as well in this calculation.
EG if we have 150mm left at the end we could increase the cross member centres slightly to take up this additional space without going over the maximum space allowable.
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Jan 18, 2012
I have two sets of identical spur gears. I want them to be lined and connected big-small-big-small gear. But how to connect this two sets together. I can create motion and axes constrains but it still lacks teath meshing. I found some tutorial how to create differential drive, it works with downloaded gears but not with one that I create (it says to set imates to visible which does nothing and alt-move mesh imates toghether which also do not work). I work with 2009 and 2011 versions.
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Oct 26, 2011
I want to create a 3D model for a metal frame I bought commerically. To create the model in Inventor, I need to know the bend angle such as the one shown in the first figure of:
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What kind of tool do I need to measure the bend angle of the real metal frame reasonably accurately?
In Inventor, is there an easy eay to create the teeth of the servo horns?
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May 23, 2013
Is there any way to draw built in gears by gear generator in Inventor? I mean, I need to create a spur gear around a solid body and then it is gonna be processed directly onto the body during manufacturing.
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Nov 12, 2012
I'm trying to design a gear system wherein a small gear rotating on an axle interacts with a large gear, held on an arm. The arm rotates about the same axis as the small gear, in the opposite direction. I applied the relevant motion constraint between the two gears. When I rotate the arm, the motion of the large gear rotates the small gear. However, if I just rotate the small gear, it freewheels, and the large gear doesn't move at all. This is a problem, because the machine depends on the independent rotation of both gear and arm-- the small gear has an input applied to it, but if I try to rotate it it has no effect on the large gear. I assume this is to do with the fact that the large gear's axis of rotation moves with the rotation of the arm.
I can't just throw it all into dynamic simulation, because I don't know yet what kind of torques will be rotating the arm and the small gear-- I know how they rotate relative to each other in terms of degrees, but that's all.
Essentially what I need to do is make it so that rotating the small gear turns the big gear, even when the arm is free to move (when it's grounded, the gears turn normally). I thought about using a contact set, but the gears (generated by Inventor) actually slightly intersect at the teeth, so that doesn't work.
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Mar 24, 2013
how we can design a set of internal gears?
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Sep 28, 2012
I am trying to draw a bevel gears from drawings, one is a scroll plate and the others are gears with a key hole. As you can see in the following attachment.
My question is how do you draw bevel gears on the face of the scroll plate and the cylindrical face of the other 3 gears?
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Mar 5, 2013
I'm given this data to generate my worm gear set with:
Worm Gear Data:
Diametral Pitch: 8
Number of Teeth: 27
Pressure Angle: 20 Degrees
Pitch Diameter: 4.219
Base Circle Diameter: 4.523
Circular Pitch: .491
Circular Thickness: .246
Root Diameter: 3.906
Face Width: .783
Worm Data:
Number of Threads: 5
Pressure Angle: 20 Degrees
Pitch Diameter: .938
Lead Right Hand: .375
Lead Angle: 169 Degrees
Addendum: .156
Whole Depth: .313
Chordal Thickness: .204
Inner Diameter: .619
Outer Diameter: 1.244
Center Distance: 5
My problem is it keeps changing data and/or failing. It particularly hates the 27 teeth (always changes it), never shows a 5.4 gear ratio (probably because it hates the 27 teeth), and won't accept an addendum of less than 1. Is this feature limited to only certain set gear setups? the automated tool won't accept these values (which I have to work with)?
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Nov 8, 2013
I am having a problem while making 2 straight spur gears. The purpose is to connect the crankshaft with the camshaft. Center distance is fixed: 85,5mm. I would like a ratio of 0,5 with 22 and 44 teeth. My gears seem to hit each other. Please find the attached pictures below for a detail and my inputs.
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Sep 20, 2011
I have two gears. In the assembly I have them setup to mesh correctly. I can drive the constraint on the pinion and the gear will follow it (some what). I wanted a better video of it, so I went into Studio. Now when I drive the constaint like before on the pinion, the gear goes crazy.
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There is a rotational translation constraint set between the pair (= to inverse of gear ratio) that works in the iam, but it is like Studion ignores it. How can I animate this to show the gear mesh?
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Dec 10, 2013
Is it possible, using Design Accelerator to have Bevel Gears with straight teeth? I've tried every combo I can think of, and they are always curved teeth. Gears are not my most knowledgeable subject. I usually have the engineers produce the specs, & I get to draw them - they are not happy with the pictorial results.
Inventor Product Design Suite Premium 2013
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Dec 21, 2013
I made internal gears with design accelerator.
It's calculation is OK. And drag it,the rotation is good, But the direction is opposite. The tooth's move opposite direction to each other.
I used Autodesk Inventor 2013, And sp2, update DL22436649.zip But, this appeard before And after sp2 patch.
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Mar 30, 2012
I'm trying to draw a spiral bevel gears system KLINGELNBERG , but the results do not match the actual measurements of the piece.
ex. measure of the real outside diameter of the gear = 356mm
DATA :
number of teeth pinion = 9
number of teeth gear = 44
module = 5
shaft angle = 90 °
face width = 59mm
helix angle = 35 °
pressure angle = 20 °
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Jan 28, 2013
I'm trying to run a simulation of 2 bevel gears without using the transitional/rotation constraint, but using the contact between the surfaces to simulate the rotation of the gears - basically I have an L-shaped shaft running through both centers and want to have the upper gear grounded, make the lateral gear rotate around its own axis - the goal is simply to see the contact between the gears make the side gear rotate around the vertical part of the l-shaped shaft, due to the contact forces.
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Apr 4, 2012
When we generate a gear pair using the design accelerator, the balloon from the drawing assembly only reflect one number instead of 2 different numbers. How can we change the number to reflect individual gears. Attached is the graphics.
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Nov 13, 2011
I am creating a couple of spur gears using the "Center Distance" design guide. I have fixed each gear to a cylindrical face, but when I click on the "Calculate" button, there is an error saying that the center distance is incorrect.
I went back and edited my sketches so the center distance matched the one displayed in the design accelerator and attempted to calculate again, but the error persists. What am I not getting here?
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Mar 26, 2012
I am trying to draw a bicycle frame in 3D. What is the best functions to use? I first drew the frame in 2D using regular lines. Next I drew a circle at one of the intersection points, then used Sweep. I repeated the steps but with a smaller circle.
Next i was planning to Subtract the smaller tube with the large to create a tube but I am having trouble selecting to subtract to make a hollow tube. I'd like to evaluate to see if there is a easier way to draw so that it is easy to modify down the line.
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Nov 13, 2012
I have a project in where I need to create a 3D bicycle.
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Aug 9, 2012
new to 3D modelling in Autocad. the client has asked me to detail this in about 20 places on a structure.Its an SHS edge beam joining a CHS rafter.Both are at different angles.The CHS has a cleat plate, as does the edge beam.The 2 need to align and connect. The bolt hole must be 40mm off the face of the rafter.The rafter CL & edge beam CL need to coincide at a setting out point.
Where the rafter cleat plate connects to its rafter it has to be in alignment with the rafters plane.SHS edge beam will need to have its sides vertical and horizontal, so the edge beam cleat won’t be aligned with the SHS faces .
Even though I have the autocad file as an example, have tried to draw this about 100 times but cant get it right – I have been unable to contact the draftsman who did it. How to draw it and what commands to use?how to use UCS and other modelling operations.
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Jun 12, 2012
I'm modelling columns in-place. I have given the first one a Type Mark name but when i copy it the Type Name does not copy with it and the count in my schedule remains at 1.
Due to the shape of the member i had to model it as an in-place family.
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Mar 28, 2012
this is a stroke of a path of a bicycle sprocket with 32 teeth,after removing 4 teeth from 4 different parts(there is a pair of 2 different type of teeth after every 6 standard teeth,i want to remove 1 of these 6 in each of the 4 parts).
I do not know how to join up the open ends of the path to maintain the circular shape to produce a 28 tooth sprocket,the teeth size are not to change just the circle.
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Dec 22, 2013
I'm trying to make some 3d spline gears in autocad, I start by generating them in eMachineshop then importing into autocad, this works fine but the gear is imported as seperat lines so I can't extrude them, i also cant join the lines because after zooming in there are quite a few gaps. How I can join the lines together without manually connecting the dots? I'll include a copy of the gear, eMachineshop only outputs dxf files as far as i know.
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Jul 4, 2005
what are the best programs for 3d modelling, such as making game characters, 3d cars etc?
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Mar 17, 2009
I am trying to put an image on a coffee mug so that it does not look like a flat image pasted onto the coffee mug.
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Oct 16, 2011
an PSPX3 or X4 import/export .vns and .obj files for 3D modelling ?
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Oct 26, 2002
way to design a 2d gear in photoshop?
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