MICROMACHINERY

The sled with the motor for the little ones. Before to introduce the following proposed material, I want to remind small note in No. 2 of our journal in 1979 — “Folding sled”. Because the author of the two designs is the same — our reader from Kazan E. Zakharov. Technical creativity pushed his little boy, who every morning had to carry to kindergarten. A regular sled because it’s bulky to travel with changes in transport are not very good, and E. Zakharov builds original furniture, the type of walking cane-chairs, now enjoys great popularity. Folding sled has interested many of our readers who have decided to make the same: it is not only convenient in use but also during storage.

The design was created under Cycling engine D-4. She showed good ride quality, well managed, overcomes the rise of 10-15°, speeds of 7-8 km/h On compacted snow motoaki carry even an adult.

 

However, because they are designed still on the “driver” of six or eight, the administration is reduced to a single pedal of “gas — grip”. When removing the feet, the return spring raises the pedal to its original position — throttle and disables the clutch, which simplifies the problem of control for a small driver. However, when starting the engine can still control the “gas” regardless of the clutch. The engine start cord.

Snowmobile weighs 17-18 kg, consist of the following main units: body, ski, motor, engine, seat, controls.

 

The HULL is a riveted construction from duralumin and duralumin parts of the same sheet with a thickness of 1 mm. Shell — bearing: it is mounted all the other nodes.

 

SKIING is also riveted from D16T sheet with a thickness of 1 mm and dural corners. On the sole of each ski has two podraza.

 

ENGINE — referred to D-4, but with some modifications. Set the pulley to Zap/ska cord attached feet and dural corners for fixing on the body of the sleigh and move when adjusting the chain tension.

 

The PROPULSION isobviously the most time consuming part of the work. It consists of the tracks, the front (leading) and rear (tension) drums and two support runners.

 

A caterpillar represents a closed ring of rubber-fabric tape with a thickness of 3 mm and a width of 135 mm, which screws with countersunk head fixed lugs from the corners of D16T size 15X15X155 mm with corresponding width and length of the stainless steel plates with a thickness of 1 mm. Lugs protrude from both sides of the tracks by 10 mm.

 

The front roller is duralumin hollow rubber cylinder Ø 56 mm, on which two steel trahtube sprocket for engagement over the projecting ends of the plates of the cleats. On the left side of the drum also planted sprocket with 18 teeth (on the rear wheel of a Bicycle) for the drive chain from the engine.

 

 

 

Scheme micromotor:

 

1 — propulsion, 2 — body, 3 — seat, 4 — tank, 5 — steering column, 6 — motor, 7 — ski 8 — the rope of gas, 9 — clutch cable, 10 pedal, 11 — recoil, 12 — lead drum (sprocket Z 18 not shown) 13 reference slides 14 — tension reel, 15 — caterpillar, 16 corner lug, 17 — pasture area, 18 — plate lug.

 

Rear drum is also aluminum hollow rubber cylinder Ø 75 mm. Both drum mounted on bearings No. 200 and rotate on axes fixed in the housing. Bearings are laterally closed by the seals.

 

Base skids of the case are made of textolite plates section 10X25 mm and located in the lower part of the vertical walls of the housing. Slip them on the projecting ends of the cleats.

 

SEAT — of the two plywood sheets 4 mm thick, with a connecting area, They have two stands for mounting to the housing. On the seat set the bracket of the steering column and gas tank and used a plastic shampoo bottle. On the tube is fixed and the tap of the feeder.

The controls — the steering wheel and pedal. For the first one cropped Bicycle handlebar from the “Eaglet”. It is inserted in the steering column stainless steel (pipe 18X08), the lower end of which is welded to the fry, rods connected with the rocking bracket of the ski.

 

Pedal — catalogo type, consists of two levers. The first controls the gas independently from the second. When pressed further on the pedal activates the clutch. The return spring pulls back to its original position pedal is released: the “gas” is translated into “small” and the clutch disengages.

 

Design has proved to be quite accessible for the baby and safe enough.

 

E. ZAKHAROV, Kazan