Using a cv joint and a universal joint on the same shaft
Using a cv joint and a universal joint on the same shaft
(OP)
Does anyone know of any issues making a half shaft with a inner cv joint (which allows the shaft to change length) and a universal joint in the outer position (instead of the outer cv joint)?
I have space limitations where I can't seem to fit the outer cv joint...
Thanks,
Mike
I have space limitations where I can't seem to fit the outer cv joint...
Thanks,
Mike
RE: Using a cv joint and a universal joint on the same shaft
http://en.wikipedia.org/wiki/Universal_joint
ISZ
RE: Using a cv joint and a universal joint on the same shaft
M
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Dr Michael F Platten
RE: Using a cv joint and a universal joint on the same shaft
Michael, how severe could the 2 per rev be -- would it be enough to destroy the u-joint? I suppose that vibration is coming from the imbalance of the yoke -- can you balance the shaft?
Thanks,
Mike
RE: Using a cv joint and a universal joint on the same shaft
Thanks again,
Mike
RE: Using a cv joint and a universal joint on the same shaft
With just one u-joint, something is going to see a sinusoidal torque. The u-joints may or may not break before the passengers get aggravated enough to kill the assembler.
Mike Halloran
Pembroke Pines, FL, USA
RE: Using a cv joint and a universal joint on the same shaft
M
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Dr Michael F Platten
RE: Using a cv joint and a universal joint on the same shaft
Mike wouldn't a 6 pin CV joint used with a 4pin U joint create an out of phase problem?
I don't know anything but the people that do.
RE: Using a cv joint and a universal joint on the same shaft
RE: Using a cv joint and a universal joint on the same shaft
Mike
RE: Using a cv joint and a universal joint on the same shaft
I have also seen them used on off-road trucks. Note the phasing of the joints.
h
One other bit of advise for non-automotive use. The joints should never be run in straight alignment for excessive periods of time. When the joint is straight the bearings do not need to rotate, which means the needle bearings don't rotate, thus all of the wear will happen on only one portion of the needles.
ISZ
RE: Using a cv joint and a universal joint on the same shaft
Traditional Chrysler vehicles had the drivetrain shifted slightly to one side to make sure this never happened. Fords traditionally have the input shaft of the rear-end slightly off-center. Not sure what GM did.
RE: Using a cv joint and a universal joint on the same shaft
RE: Using a cv joint and a universal joint on the same shaft
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I have been driving the car with the 302 for over 14 years -- but have gone through 3 triumph rears. The pinon gear can't take the additional hp. Therefore, the ford 8.8 with tracloc should solve that problem.
RE: Using a cv joint and a universal joint on the same shaft
The Triumph Spitfire series had an awful rear suspension deign and used a single UJ on the inner end of each (swing axle) driveshaft, running from the fixed differential. The other end of the driveshaft was unjointed and went directly into the wheel hub.
I could never understand how this was suppposed to work properly. Presumably the resulting vibrations / wheel acceleration & decelerations were supposed to be damped out by the tyre walls.
After three years of ownership of my Mk3 Spitfire I could strip the rear suspension, change the ruined UJ and rebuild it again in less than an hour. I used to buy them two at a time because if one went, it was always when the shops were shut and the next one was never far behind.
RE: Using a cv joint and a universal joint on the same shaft
Interesting. I assumed that this wasn't a major issue since the suspension, and thus drive shaft angles, are moving at least a little all the time.
As for the Chrysler and Ford references I had read/been told/assumed that the various offset designs were to solve clearance issues or keep the axle shafts the same part number. Of course the answers are almost always more complex.
ISZ
RE: Using a cv joint and a universal joint on the same shaft
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I thought both the GT6 and later Spitfires (MK2?) stopped using swing axles.
Anyhow, according to this even GT6s used the same u-joint?
RE: Using a cv joint and a universal joint on the same shaft
I think that must be right, the Spitfire was originally just a Herald with a new body.
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Using a cv joint and a universal joint on the same shaft
The Mk IV got outboard CV joints, ameliorating the tuck under/jacking tendency.
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Using a cv joint and a universal joint on the same shaft
RE: Using a cv joint and a universal joint on the same shaft
I would think a plain oil lite bearing would work just fine.
The same for roller rockers with needle bearings making a quarter turn each time. Makes me go hmmmm...
I don't know anything but the people that do.
RE: Using a cv joint and a universal joint on the same shaft
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Using a cv joint and a universal joint on the same shaft
Plain bearings have a much higher friction coefficient than needle bearings. They would actually run hot in an automotive application.
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