Caterpillar manufacturing. Drawing, description

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Caterpillar manufacturing. Tips for a modeller

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I offer a simple version of the manufacture of caterpillars for moving models. In a school circle of young technicians or at home, if you have the simplest plumbing tools, you can make them from ... an electric wire.

The track belt (see fig.) consists of couplings, support pads, pins and guide ridges. The support pads form two parallel treadmills along which the road wheels roll. To level the surface of the tracks, rubber or plastic plates of appropriate thickness are glued. The end sleeves are glued to the pins to prevent the track elements from shifting. The guide comb can be mounted on the middle clutch or on the two outer ones, which allows the use of both double-disk and single-disk track rollers.

Caterpillars are rewound using a gear or roller wheel. In the first case, the teeth enter the cavities between the couplings, and in the second case, the rollers engage with the guide ridges. The bending of the caterpillar along the guide and drive wheels is provided by the rotation of the support pads on parallel pins. To facilitate the rotation of the support pads, the axial clearance between their ends and the ends of the couplings should be 0,3-0,5 mm. On the support pads of the tracks of models made in scale 1 : 20, 1 : 15, the installation of special lugs is optional.

General view of the parts of the tracks and their assembly scheme (click to enlarge): 1 - coupling, 2 - lining, 3 - support pad (half of the track), 4 - workpiece for tracks, 5 - cutting lines of the workpiece, 6 - guide comb, 7 - fingers, 8 - blank for couplings, 9 - cutting lines of the blank.

Manufacturing order. A household electric two-core wire with copper or aluminum wire in PVC insulation grade PPV 2X2,5 is pre-cut into pieces 300-400 mm long. The wire is removed, and the blanks are cut with a knife into elements of width B1 and B2.

Connecting fingers are cut from the wire. Their length should be 1-2 mm more than the total width of the caterpillar. The guide comb is made of sheet metal with a thickness of 0,3-0,4 mm. Couplings, guide comb and plates are placed on BF-2 glue.

The most critical operation in the manufacture of caterpillars from wire insulation is cutting blanks. The assembly of the tracks itself is simple.

For a tank model on a scale of 1:20, caterpillar elements of the following sizes, in mm, can be offered:

Here b, b1, b2 are the width of the caterpillar, track and coupling, respectively; l and l1 - the length of the track and coupling, respectively; l1 and l2 - center-to-center distance of the holes of the coupling and track.

The arrows show the assembly diagram of the caterpillar chain.

Author: Yu.Alisova

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