Dog Gear?

[Dan-o]

We are designing a similar system since we don't have room in our budget for 1 or 2 Super-Shifters. Unfortunately, I am having trouble understanding just one concept about this method of power transmission.

My understanding is that the power source (crankshaft) is connected to the output rod (driveshaft) by a pair of gears. The input gear is rigidly coupled to the crankshaft. The output gear is connected by a bearing to the driveshaft so it can rotate freely if the dog collar is not engaged. The dog collar is coupled to the driveshaft so that it rotates with the shaft, but can move axially to engage or disengage the output gear.

First, is my understanding of this system correct? Second, how can a piston push or pull the dog collar as it rotates on the shaft? In other words, I need to undestand the linkage from the piston to the dog collar.

Thank you very much in advance for any help you can provide.

[MrForbes]

This is about as far as we got on our Inventor design yesterday.



The black shaft is driven by the motor/gearbox. The pink spool has bushings which allow it to rotate and slide on the shaft. The light gray pin is pressed into the black shaft, it turns with it.

Not shown is the "fork" and it's actuating pneumatic cylinder. The fork fits into the groove at the left end of the spool, and slides the spool along the black shaft to allow the two pins on the end of the spool to engage or disengage the other pin.

To wind the winch, the spool is slid by the cylinder/fork to the right to engage the pins, then the motor runs, then stops. The cylinder is energized the other way to disengage the pins, pulling the spool to the left, and allowing the winch to unwind suddenly.

This still in the design/fabrication stage, if you see any problems, please let us know!

[Collin Fultz]

Originally Posted by Dan-o

First, is my understanding of this system correct? Second, how can a piston push or pull the dog collar as it rotates on the shaft? In other words, I need to undestand the linkage from the piston to the dog collar.

1. Yes.

2. Take a look at this shaft and this linkage. Basically, the shaft that the dog powers is hollow and slotted. The slot allows the pin on the dog to move axially along the shaft. The hollowed out portion of the shaft is where that shifting shaft rides.

It's tough to explain but once you see one for yourself it makes perfect sense. If this didn't help, let me know and I can take some photos of our Super Shifters for you to help explain.

Good luck!

[Akash Rastogi]

Originally Posted by Dan-o

We are designing a similar system since we don't have room in our budget for 1 or 2 Super-Shifters. Unfortunately, I am having trouble understanding just one concept about this method of power transmission.

My understanding is that the power source (crankshaft) is connected to the output rod (driveshaft) by a pair of gears. The input gear is rigidly coupled to the crankshaft. The output gear is connected by a bearing to the driveshaft so it can rotate freely if the dog collar is not engaged. The dog collar is coupled to the driveshaft so that it rotates with the shaft, but can move axially to engage or disengage the output gear.

First, is my understanding of this system correct? Second, how can a piston push or pull the dog collar as it rotates on the shaft? In other words, I need to undestand the linkage from the piston to the dog collar.

Thank you very much in advance for any help you can provide.

Here's a post of some finished CAD for a kicker 1323 and 11 are using.

http://www.chiefdelphi.com/forums/sh...85&postcount=8

There's a custom hub attached to the sprocket.