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Showing results for tags 'tracked vehicle steering'.
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I have always wanted a compact combined transmission + dual differential steering module for tracked vehicles. Though the biggest problem with linear setups is there is a seperate transmission and subtractor module, this is rather spacious and takes up a large space inside of a vehicle's hull. The main requisites for my current solution is that it needed to fit within a 12 stud wide space (walls included) as this is a very common width of the hull for armored vehicles. It also needed to have the option to mount several XL motors to power it. I know a Sbrick will easily solve the solution, though a complex mechanical solution is more intersting. I present a WIP solution, I have tested it, and it has some issues with the worm gear for neutral steering, and needs some reinforcement to some of the connections. It features a 1:1 ratio, and 3:1 ratio for the transmission. The biggest current issue is with the steering mechanism, the test chassis I was using was rather long, so neutral steering just resulted in lots of slippage in the worm gear's mounting. Though when the vehicle was driving and steering, it seemed to function correctly with little slippage. I believe there is also some slippage between the last clutch gear and 20z gear that drives the differentials, I have attempted to reinforce the structure, and it mitigated skipping of teeth, though it still encounters the issue when the mechanism is nearly stalled. Green is the drive motor input. Orange is the steering motor input. V1.0 Integrated dual differential steering with 2-speed transmission by Tommy Styrvoky, on Flickr Integrated dual differential steering with 2-speed transmission by Tommy Styrvoky, on Flickr Integrated dual differential steering with 2-speed transmission by Tommy Styrvoky, on Flickr Integrated dual differential steering with 2-speed transmission by Tommy Styrvoky, on Flickr LDD file if someone wants to improve the model. I implemented the fixes, and made it one stud shorter, I also reinforced the worm gear casing, and added supports to it. V1.1 V1.1 by Tommy Styrvoky, on Flickr V1.1 by Tommy Styrvoky, on Flickr V1.1 LDD file Version 2.0 I completely revised the steering gear, removing the worm gear and the loosely supported steering for the differentials, and increased the gear ratio from 1:2 to 1:3. This made the base unit more compact as well as reinforcing it. As I had some major issues with the previous version in some of my larger models, it failed to function correctly, and resulted in slippage and loss of power. Lego Integrated Dual differential steering and two speed transmission V2 by Tommy Styrvoky, on Flickr Lego Integrated Dual differential steering and two speed transmission V2 by Tommy Styrvoky, on Flickr Lego Integrated Dual differential steering and two speed transmission V2 by Tommy Styrvoky, on Flickr Lego Integrated Dual differential steering and two speed transmission V2 by Tommy Styrvoky, on Flickr V2.0 LDD file