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Unread 11-04-2006, 08:10
Andy Baker's Avatar Woodie Flowers Award
Andy Baker Andy Baker is offline
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Re: 222's TigerDrive

Very, very nice transmission. The compact design is fabulous. The reversed direction pneumatic cylinder is a nice twist to save space. I do have some questions:

1. What made you switch from bushings to bearings?
2. Why use collar clamps on the CIM shafts as opposed to steel shaft clips (like the ones used on the Kit Transmission)?
3. Are the CIM gears pressed onto the CIM shafts?

This is definitely another outstanding design coming from the Tigertrons.

Way to go!!

Andy B.
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Unread 11-04-2006, 08:41
camtunkpa camtunkpa is offline
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Re: 222's TigerDrive

Quote:
Originally Posted by Andy Baker
Very, very nice transmission. The compact design is fabulous. The reversed direction pneumatic cylinder is a nice twist to save space. I do have some questions:

1. What made you switch from bushings to bearings?
2. Why use collar clamps on the CIM shafts as opposed to steel shaft clips (like the ones used on the Kit Transmission)?
3. Are the CIM gears pressed onto the CIM shafts?

This is definitely another outstanding design coming from the Tigertrons.

Way to go!!

Andy B.
1. We switched from bushings to bearings for a couple reasons. The first reason was simply to increase efficiency. The second reason is because bearings worked out very well for our input cluster. Bushings were a simple and cost effective method for 2005, but were not the best way to do things on a high RPM gear cluster.

2&3. The gears on our CIM motors are not stem pinions. We had planned on stem pinions and using another bearing in the plate opposite the CIM motors, but decided we could save some weight and headaches by switching to a regular gear. the reason we have collars on the CIM gears is to 'pinch' the gear onto the shaft. We did this mainly because our team doesn't have any metric broaches and we didn't want to modify the CIM shaft. We have used this design previously in 2004 and it worked very well for us.

Thanks all for the kind compliments! Transmissions like this only happen when enthusiastic STUDENTS get involved in the design and build and constantly push the team to do better! Thanks Henry and Bunney you guys put in alot of time convincing the team we needed a dual motor drive and even more time machining your wishes.
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Last edited by camtunkpa : 11-04-2006 at 16:43.
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Unread 11-04-2006, 23:19
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Re: 222's TigerDrive

Quote:
Originally Posted by camtunkpa
1. We switched from bushings to bearings for a couple reasons. The first reason was simply to increase efficiency. The second reason is because bearings worked out very well for our input cluster. Bushings were a simple and cost effective method for 2005, but were not the best way to do things on a high RPM gear cluster.

2&3. The gears on our CIM motors are not stem pinions. We had planned on stem pinions and using another bearing in the plate opposite the CIM motors, but decided we could save some weight and headaches by switching to a regular gear. the reason we have collars on the CIM gears is to 'pinch' the gear onto the shaft. We did this mainly because our team doesn't have any metric broaches and we didn't want to modify the CIM shaft. We have used this design previously in 2004 and it worked very well for us.

Thanks all for the kind compliments! Transmissions like this only happen when enthusiastic STUDENTS get involved in the design and build and constantly push the team to do better! Thanks Henry and Bunney you guys put in alot of time convincing the team we needed a dual motor drive and even more time machining your wishes.
Thanks Cliff for believing in us!
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  #4   Spotlight this post!  
Unread 12-04-2006, 00:34
sanddrag sanddrag is offline
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Re: 222's TigerDrive

I thought somebody told me once that you were running 20 pitch 11 tooth pinions on the CIM motors and the reason for those clamping collars is that you cannot fit a keyway because the "wall thickness" between the root diameter and the bore diameter is so thin. I might be dreaming though. I can't remember.
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  #5   Spotlight this post!  
Unread 12-04-2006, 08:20
camtunkpa camtunkpa is offline
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Re: 222's TigerDrive

Quote:
Originally Posted by sanddrag
I thought somebody told me once that you were running 20 pitch 11 tooth pinions on the CIM motors and the reason for those clamping collars is that you cannot fit a keyway because the "wall thickness" between the root diameter and the bore diameter is so thin. I might be dreaming though. I can't remember.
yup you are correct I just looked at the measurements last night.
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