"Parma" cuts through the swamps and impassability of our vast country.

All data is taken from the Lunokhodov.Net website forum, where he shares his experience and skills under the nickname mishanya68.

Tasks originally assigned to the all-terrain vehicle builder.

The technical requirements and wishes include the following points:
1. confident movement on snow of medium depth and density for the Urals.
2. capacity 2 people, plus 50-80 kg of cargo.
3. minimum, must confidently float on the water (the main use is fishing and buoyancy for safety).
4. The main application is snow and ice 90%, the rest is autumn and spring-snow with mud.
5. to the maximum use of ready-made serial parts and assemblies.

In connection with this project, I once again re-read the topics on "Basin", "Luntik", "Barsik" and "Yukon" - these are ready-made all-terrain vehicles described on the website "Lunokhodov.Net". Many thanks to the authors of the projects for sharing their experience, best practices and drawings that they used.

Based on the experience of previous builders, I outlined an approximate design
1. rotation on the differential with a rear axle, but we will put a cylindrical one.
2. The engine is 2-cylinder, made in China, with a cylinder capacity of 690 cubic mm.
3. transmission: belt variator - gearbox from VAZ 5-speed - rear axle from VAZ.
4. dimensions 2500x1750 mm.

The rear axle is taken from the classic Zhiguli. Instead of wheels, sprockets are worn (drive wheels for a caterpillar)

The beam was used. From disassembly, after checking for straightness, I cut off the excess and immediately cleaned it, cleaned it with petal circles with a grain of 40. It turned out pretty quickly, 1.5-2 hours for everything, and cleaning took about 30 minutes. But this time is then saved on welding and painting.

Engine made in China.

Drawings have been developed for the production of guides that are fixed to the inside of the track tape and prevent the tracks from coming off during movement and turns.

Semiaxle factory.

Half shaft purchased, find the differences! Therefore, it was decided to leave the factory half shafts, but with the replacement of bearings.

I bought belts for the production of caterpillars in a rubber goods store at a repair plant in Perm.

Can you be more specific: what is "increased strength"??? In numbers. 4 spacers is good, 12mm is not much?

The strength of the tape is created by the gaskets - the rest is rubber, which in itself does not carry a load, BUT protects the gaskets from damage. For example, I took one so that on one side (outer) it was 3-4 mm, and on the other (inner) - 1 mm. From the inside, damage is practically not expected, and the extra thickness is extra weight and not small! As for the gaskets - they are ALWAYS the same thickness - 1mm., The rest is from their number!

By footage: I took 4 pcs. with a length of 6.5 m, width-150mm, thickness-8mm, ply-7. It turned out for 10 thousand rubles.

He began to cook the frame of the future all-terrain vehicle. Someone calls the frame, someone calls it a boat, someone calls it a skeleton, and the author calls this design a keel, since the all-terrain vehicle is more designed for swimming.

The rounded front of the keel should improve the floating quality of the car.

It was decided to make an all-terrain vehicle without a balancer, as it is intended for trips in winter, the roads are smoother, the weight of the structure is reduced, and it is technically easier to implement.

The frame is assembled with road wheels on both sides, the most common and common wheels are used with R 13 from VAZ, the bottom of the star is raised from the floor level by 350 mm, the wheel is 570 mm in diameter.

Preparation of tracks for the manufacture of caterpillars.

Mounting plates.

Drilling template.

Ready-made holes on the conveyor belts for the manufacture of caterpillars.

Drilling holes according to the template.

Assembly.

A device for drilling holes in rubber using the punch method, but here you don’t need to hit the punch, it is clamped into the drill chuck and the rubber is cut, very good holes are obtained and less effort is needed.

You can watch the video on how it's done.

Photo of a fixture clamped in a drill chuck.

Photo fixture for bending pressure plates and bent plates.

One caterpillar is ready.

Safety engineering. So that it does not hurt to hit the ends of the pipe and not scratch, it is better to protect yourself, at least with gloves.

The caterpillar fits the sprocket, all the tracks are in contact with the teeth.

Front view.

The tension mechanism is designed so that both sloths are tensioned at the same time, there are pros and cons of this method. Plus, the biggest one is the same tension of the tracks, provided that the tracks are the same during manufacture and equally stretched, ease of execution and more reliable fastening of the idler axis. If these conditions are met, driving straightness is guaranteed.

Cons - poor sealing of the boat, since the sloth shaft passes inside the boat, if one caterpillar has flown off, then both sides relax in order to dress. Also to be removed for repairs if necessary.

Plates for fastening tension mechanisms.

Ukosina and amplifiers are welded.

Bridge fastening.

Installing disc brakes on the bridge from the VAZ, due to the braking of the drive wheels, the all-terrain vehicle will turn while driving.

The guides on the inside of the caterpillar, on the upper fold along the edges of the canine, are pressed through by 9 mm, this is with a plate width of 40 mm, steel thickness is 2.5 mm. this is the limit for a press with a force of 10 tons.

Guides, with a plate welded inside for attaching to tracks.

Device for making guide plates using a press.

So the guide will pass along the tension wheel.