Hello Hein, Titan Wolf, Stefan, and trike like!
I have been doing a few things in the last few weeks that I want to share. I last posted with some sketches that showed how I thought a potential tilt steering mechanism might look like. After reviewing the ideas and models I had previously made I made up the following models. The first is the basic geometry of a tilting assembly using Heim joints (Rod Ends) for the bearings. Heim joints are a bit of a departure from what I have been illustrating but would seem to be superior in some ways to thrust bearings. I do have dust covers for the bearings but they are not shown in place...
Without the reinforcing structure necessary to hold the arms in place, as my previous post shows, the tilting mechanism will fold far beyond the furthest limit that might be used on the trike when tilting. I show this just to illustrate the potential. The furthest practical tilt would be somewhere near 45 degrees on a trike like this.
I had to experiment a bit to get everything to fold correctly using the hardware you see in place. I am still using 1" square wooden dowels to make the prototypes. The hardware took awhile to come by slow mail order from Speedway Motors. See https://www.speedwaymotors.com/QA1-GFR6T-G-Series-Rod-End-Stainless-Steel-3-8-24-RH-Female-Thread,261549.html
I used the female rod ends to simplify eventual attachment to aluminum with stainless bolts. Above I am still using the published XYZ trike proportions on the main frame. This will be changing to accommodate the tilt steering column that you can see in the following Videos.
As I previously posted Martin Hill came up with the base idea for creating a tilting steering column and in the videos I am now posting I am applying that idea to the XYZ platform.
Ok! Videos are currently working 01-22-2018
This first video shows the test rig I threw together to allow adjustment up of the height of the steering column and of the width of the tilt arms. This adjustable test stand was a huge help in getting the mechanism to work correctly. Now here is the second video that has a bit better lighting to see things working.
Thats me with the pinky ring. I am in junky work cloths. As can be seen in the video the test stand is a bit tipsy unless clamped down on a bench. I think this illustrates that the tilt mechanism can exceed the theoretical limits a trike might need for banking in a turn.
The diagonal rods would be exchanged for a similarly sized bicycle rear shock absorbers. The arms would be completed much like the first series of pictures and have an upper and a lower set of arms connected with the outer part of the arms where the wheels would attach.
The following are some stills of the mechanism and incidentally the test stand.
As can be seen the garage shop is very cluttered! I am working on removing junk kinda slowly... Finally a picture of the test rig with the over large shocks I bought first. It gives a bit of a look at what the final product might look like, although the above pictures are the revised version and this is already out dated...
So there it is a functioning tilt mechanism that can be controlled. It will make the turns with full possible tilt.
I believe this addresses both control issues and tilt feasibility.
Ceeann
PS. We now have a functioning bathroom with toilet, sink, bath tub and shower. We are about half done with that chore... onward to the Master bath!
I have been doing a few things in the last few weeks that I want to share. I last posted with some sketches that showed how I thought a potential tilt steering mechanism might look like. After reviewing the ideas and models I had previously made I made up the following models. The first is the basic geometry of a tilting assembly using Heim joints (Rod Ends) for the bearings. Heim joints are a bit of a departure from what I have been illustrating but would seem to be superior in some ways to thrust bearings. I do have dust covers for the bearings but they are not shown in place...
Without the reinforcing structure necessary to hold the arms in place, as my previous post shows, the tilting mechanism will fold far beyond the furthest limit that might be used on the trike when tilting. I show this just to illustrate the potential. The furthest practical tilt would be somewhere near 45 degrees on a trike like this.
I had to experiment a bit to get everything to fold correctly using the hardware you see in place. I am still using 1" square wooden dowels to make the prototypes. The hardware took awhile to come by slow mail order from Speedway Motors. See https://www.speedwaymotors.com/QA1-GFR6T-G-Series-Rod-End-Stainless-Steel-3-8-24-RH-Female-Thread,261549.html
I used the female rod ends to simplify eventual attachment to aluminum with stainless bolts. Above I am still using the published XYZ trike proportions on the main frame. This will be changing to accommodate the tilt steering column that you can see in the following Videos.
As I previously posted Martin Hill came up with the base idea for creating a tilting steering column and in the videos I am now posting I am applying that idea to the XYZ platform.
Ok! Videos are currently working 01-22-2018
This first video shows the test rig I threw together to allow adjustment up of the height of the steering column and of the width of the tilt arms. This adjustable test stand was a huge help in getting the mechanism to work correctly. Now here is the second video that has a bit better lighting to see things working.
Thats me with the pinky ring. I am in junky work cloths. As can be seen in the video the test stand is a bit tipsy unless clamped down on a bench. I think this illustrates that the tilt mechanism can exceed the theoretical limits a trike might need for banking in a turn.
The diagonal rods would be exchanged for a similarly sized bicycle rear shock absorbers. The arms would be completed much like the first series of pictures and have an upper and a lower set of arms connected with the outer part of the arms where the wheels would attach.
The following are some stills of the mechanism and incidentally the test stand.
As can be seen the garage shop is very cluttered! I am working on removing junk kinda slowly... Finally a picture of the test rig with the over large shocks I bought first. It gives a bit of a look at what the final product might look like, although the above pictures are the revised version and this is already out dated...
I believe this addresses both control issues and tilt feasibility.
Ceeann
PS. We now have a functioning bathroom with toilet, sink, bath tub and shower. We are about half done with that chore... onward to the Master bath!
Oscillating Spindle Sander
ReplyDeletevery interesting , good job and thanks for sharing such a good information