Three-wheeled motorcycle. Drawing, description

TOOLS AND MECHANISMS FOR AGRICULTURE
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Three-wheeled motorcycle. Drawing, description

Tools and mechanisms for agriculture

Directory / Tools and mechanisms for agriculture

This three-wheeled motor cart was created for gardening and household purposes; it is convenient to carry bags, inventory and other small loads. The engine here is a conventional D-6 bicycle motor, which is quite widely used in gardening partnerships to drive rippers, cultivators, pumps, and mowers. However, its design is designed for cooling from the oncoming air flow while moving.

To work in unusual new conditions, it is required to equip the bicycle motor with a forced cooling system, which I did in the manufacture of my motorized cart.

Tricycle
Rice. 1. Moto cart

He took as a basis the design published in the article "Bicycle engine on a motor-cultivator" ("MK" No. 8 for 1979), but slightly changed it, adapting it to his car. The improvement of the engine is reduced to the installation of a crankshaft of a centrifugal fan enclosed in a casing on one of the heostsviks. It directs the air flow to the hottest parts: the cylinder head and the top of the cylinder.

In the engine itself, only the clutch cover will have to be finished. First, bore a through hole Ø 29 mm in its wall coaxially with the socket of the crankshaft drive gear. Then, cut out the fan impeller from a duralumin sheet 0,5-1,0 mm thick. I advise you to bring the height of its six blades to 20 mm. It is attached to the crankshaft with a bushing and an M8 bolt, which are easy to machine on a lathe.

Rice. 2. D-6 engine with forced cooling (click to enlarge): 1 - casing, 2 - bushing, 3 - M8 bolt, 4 - casing cover, 5 - impeller

Tricycle
Rice. 3. Fastening the casing on the clutch cover: 1 - clutch cover, 2 - rivets, 3 - bolt hole, 4 - clamps - tin strips, 5 - casing with air duct

The blanks of the casing and the air duct are cut from galvanized sheet and soldered into a rigid box with an internal channel that directs the tangential air flow from the impeller to the cylinder head from the front (and not from the side, as recommended in the article). This arrangement does not require repositioning of the head. In addition, the thin air duct does not interfere with conventional counter-flow cooling. The casing is attached to the clutch cover with a pair of aluminum rivets, as well as two of the five bolts that attract the cover to the engine crankcase. The casing cover with a central air intake is also soldered from tin. With its high side, it is tightly inserted into the casing and is fixed in this position with four tin strips soldered on the outside.

Author: P. Stanevsky

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