"UMKA" - everyone recalls a little white bear cub from the cartoon, but in our case it’s a caterpillar miniall-terrain vehicle-amphibian. Oleg made it from outside of Moscow for a year of hard work, about which he told us at the forum under the name Shnivovod.
The result was a very fast and nimble all-terrain vehicle, such homemade not everyone can boast. Watch the video how Oleg drives a snowy field to his UMKE.
How did it all start? Of course, with the layout and calculations, drawings and the collection of necessary spare parts and assemblies.
Began construction new unit.
Width is 1600 mm.
Length is 2400 mm.
Rear-engine layout (a la PARMA).
Lifan engine with a capacity of 21 l / s.
CVT var. Clarification (That's what I ordered: Centrifugal regulator bolt, Safari centrifugal regulator (variator) (for towing towers) on a shaft of 25.40 mm,
Pulley driven assembly (agricultural Itlan-Kayur), belt 33, this is the main, then it depends on where you will put).
Gearbox (gearbox) -VAZ.
Rear axle from the VAZ.
Three road wheels on each side use wheels with a radius of R13 chamber.
Independent lever suspension on the silent blocks and shock absorbers.
The caterpillar is made of a three-cord conveyor belt with a thickness of 10 mm, HDPE tracks.
Planned weight 500 kg.
Welded the frame of the future all-terrain vehicle.
Hung road wheels.
This is how the suspension arm looks, the suspension is independent, which gives a smooth ride over rough terrain.
Suspension of middle support wheels.
Lever mounting assembly.
The back lever with a tensioner, on this axis the tension wheel-sloth will land.
A ready-made track lies on the wheel, a caterpillar will consist of many such tracks. The dimensions of the truck are 400/45/27.
Trucki was cut from an HDPE pipe, the wall thickness was 27 mm, first he cut a piece of 40 mm from the pipe, and then he dismantled it along. Cut with a hand circular saw.
The caterpillar itself assembly.
Wheel leading asterisk.
Threaded bushings are welded to the base so that the teeth can then be fixed.
The teeth are on wheels, the teeth are made of technical plate, with ovals of snowplows, cut with a sharp knife, and then finished on an emery.
Teeth fastening.
Making fangs.
Caterpillar assembly moment.
The caterpillar is dressed.
Caterpillar on a driving wheel.
Caterpillar on a sloth.
I got the engine, installed a belt drive on it and a pulley under the alternator belt.
Sheathed the boat on the sides, the welding is tight, the all-terrain vehicle buoyancy depends on it while overcoming water obstacles.
I welded a plug in the hull to drain oil from the bridge.
It looks like the hull of the boat in finished form.
In the back, I made a drainage plug for draining water from the body.
Gearbox with a platform for mounting the engine.
CVT pulley.
All this was assembled and installed in a boat.
Cardan to the rear axle.
Started the engine, checked the mechanisms.
Gathered management.
I connected the brakes.
Sealed entry for brake pipes.
Installed a winch.
The frame of the upper part of the cab.
Made a hood for the engine.
He drove out into the street.
Fitting the dimensions of the trailer and the all-terrain vehicle.
Cutting trim.
Finished the primer.
Finished painting.
Attachment of equipment to the boat.
Finished assembly.
Cabin.
Engine compartment and passenger seat.
Back view.
Side view.
Engine compartment and hood.
The first exit and on a tie (cable) home.
A brief summary of the first pokatushki.
1. The suspension works, it doesn’t tear off anything, it doesn’t bend. There is no longitudinal swing when moving.
2. The control for the differential is normal, does not scour in a straight line, it is easy to steer on the primer, on the grass a little harder.
3. The boat holds water, there are no leaks. At the expense of swimming, I do not know yet, it is necessary to drive into clean water, but in the swamp it is not clear.
4. The engine worked 2 m / h, no complaints.
5. Caterpillar: a stretch made weak, tracks, fangs, all intact, no wear yet. Wheels are intact, wear is invisible, pressure is 1.5.
6. CVT: here he presented a surprise, in the form of jamming the movable plate of the driving pulley. Upon opening, a black sticky thread was found on the sleeve and shaft, after its removal the variator works.
Another departure after troubleshooting.
Yes, they did a speed measurement.
1 speed maximum 8 km / h
2.15 km / h
3. 20 km / h
4.25 km / h
Measured on a flat plot of gravel along the intersection workers 1-2 gear.
Swam on the water with an electric motor, not an option.
Participated in the Vologda race.
On the way back.
A dangerous quagmire sucked us ...
Another video from the campaign.
Once again storm the river.
With a group of ATVs.
Recent photos.
Good luck to all-terrain vehicle Oleg.