All-terrain vehicle 6x6 "Severodvinsk"

Interesting model an all-terrain vehicle on three axles with an on-board turn called Severodvinsk.
The author conceived all-terrain vehicle for transportation of fishing catch and hunting hunting on forest roads, therefore, the all-terrain vehicle must have not only increased cross-country ability, but also good load carrying capacity, and therefore reliability. In addition, one of the author’s desires was to make the all-terrain vehicle capable of overcoming water barriers, in particular small rivers.

Used aggregates and parts in the construction of an all-terrain vehicle:

1) Internal combustion engine Kubota 1505T
2) Gearbox from gas-71
3) Wheels Trackol
4) Stars Z-49 z-12

Consider in more detail the stages of construction of an all-terrain vehicle.

To start, the frame was welded:


Then the author proceeded to try on and install the engine on the frame:


Then, the author began to search and wash the gearbox from the Gas-71:


Disks with a departure of 90 were purchased:


Tires Trekol 1300x600 for winter use, for the summer the author plans to install tires Chita 1400.


Z-49 driven stars installed:


Then the bearings with the shaft and driving stars Z-12 are fitted:


Prepared for installation axle and hub of the middle axis:


After a full fitting and preparation of details, the author proceeded to a full-scale assembly:


The wheels were mounted on the assembled frame with units:


The author decided to make a chain drive on each wheel. Also set the driven stars so that their level is different.
This feature is due to the fact that in practice the most loaded rear, front ones do not transmit much. The possibility of throwing a chain from medium to front was also considered, in which case the drive can be moved from the center, if this is necessary of course. Thanks to this, the cantilevers decrease, on the drive 2 stars, on the middle axis, too, two.

Then all the ports on the port side were assembled and installed:


The next assembly step was the installation of the hub, trunnion, starboard star, respectively:


The leading star is located at a minimum distance from the driven one, this is enough to set the stars near the disk itself, we can say that it is "inside" the tire.
Before installation, the author made accurate calculations, since the chains will be in the casings, it is necessary that sufficient gaps remain.

Fitting the chain:

At the next stage, the author ran into small problems.
It turned out to be difficult to set the drive shaft, and choose the sag of three chains at once:


It was solved in the following way: a movable plate was made for the drive shaft, and set more accurately, since it is difficult to hold onto the clamps.
Tensioners are used only on the outer chains, on the middle there are none. There is a GP on the same axis with the drive shaft, there are gaps from the frame, but they are limited by the layout, and the author would like to find the best option so that there are minimal sagging with the new chains.

Unfortunately, this cannot be solved with a conventional tensioner, shifting (laying) the middle axis.


Since the allowable stroke had a margin of a couple of centimeters up / down, it was decided 15 mm down and back to lower (around the circumference) the drive shaft.
This required:
1. Shorten the middle chain to a minimum and set it tight.
2. Next, the frame is cut under 45 degrees. vertically at four points in the middle between the middle and extreme axis, the base is allowed. Segments are thrown out in order to catch a condition of chains in tight. Welded inserts.
3. Since the profile on the frame is not so massive on such a machine, and also to insure welding, from below, the profile is welded half less along the side members.
All the chains had to be set very tight, after the factory they will become normal for the first ten kilometers, and the tensioners then as expected, then they will do their own.
Also, the author did not forget to leave gaps under the wheels of summer tires.
Summer tires are planned Chita, a two-layer diameter of 1330 on the disk 50, between the center 1370. Since in the future under the wheels and wheels may have to adjust the base.

The installation of all the hubs was completed to the end:


Final drive installed:



Tires were received:

After trying on, as the author had expected, I had to slightly increase the base of the all-terrain vehicle, under the size of the tires from Chita. Everything was adjusted manually with wheels and summer tires.

The drive shafts were fixed:


All the chains are dressed, and also the base, after all the manipulations with the tires, has been increased to 2820 mm:


The tire was easily dressed by one person, that is, the author himself, and two small mounts. The width of the disc is 500 (for automobiles), the tire is two-layer, the size of the assembled wheel at 0.2 kg. 1350x580 mm, offset from the tire to the mounting disk 120 mm.


Additional work on the installation of the engine and gearbox:


Pillows used on the engine, from UAZ Patriot, at the checkpoint from ChevyNiva.
Then the controls were made, everything was welded and screwed, tucked and greased.


ATV Testing Video:


Wheels installed:


Test run completed:


The author started the bodywork:


All-terrain vehicle sheathing works:


At the expense of size: this indoors it seems large. There is a lot of space inside.
It’s hard to say about maneuverability, since there was no swap during the test and drove 0.3 kg, and adjustment of the main gear is also required. In general, the author does not care about riding in the snow (except for the off-season) on an all-terrain vehicle; he has a snowmobile for this.
Although it is possible to ride on even and deep snow, only the weight of the all-terrain vehicle should be different than in summer and the tire pressure is minimal, but any snow slide can become a problem, the swamp (liquid) is even, here you can either pull on soft tires or row like a wheeled steamer ( if the tread allows), in any case, it’s very good when the bottom is flat, but rather a “boat”.

An air duct was built:


Computer model of the future all-terrain vehicle:


Cardboard duct model:


View from a different angle:

The entire 6x6 scheme for trackball was originally planned, so there were no sherpas then, with the advent of tires from Chita, the author decided to increase the base with the possibility of installing any tires up to size 1450x620, two cheat tires were purchased (with delivery) for the price of one sherpa tire without delivery . Tires are excellent, especially for side turning.



This is the dashboard:


painting work:

Video with the finished machine:


The author is going to transport in such a way so as not to waste tire resources on city asphalt, as well as save time and fuel.


The pressure in the swamp and for comfortable movement on rough terrain should be approximately 0.12-0.14, because the manufacture of levers and swap cables is not finished, and we etched the tires to 0.05 kg. and they flattened correctly.

This turned out to be a "carriage", 20 mm penoplex + 3 mm plywood.


Video of overcoming a water barrier, where in an all-terrain vehicle there are about 400 kg of cargo, as well as two people of 110 kg each.