A RAKE WITH WHEELS

RAKE WITH WHEELSAn ordinary hand rake for harvesting hay is a tool the ancient and familiar to every villager. As a rule, all parts of this instrument from wood, that was easy, after all, to keep his accounts at work is almost always on weight. The width of the grip hand rake is small, accordingly, the performance of the small, even the enthusiastic collector.

Haying time — the time when the bad weather is not just a hindrance in the work, but also misfortune. Rain is the worst enemy of cut grass. If soaked, the hay will not only lose their valuable qualities, but it may be beyond redemption. The most sad thing is that to make up the loss often just nothing.

 

Farmers in the hay harvest, as soon as he sees on the horizon a cloud, in a hurry to rake up the grass in stacks and Stozhkov, and, if possible, to shelter them from the top with a tarp or plastic Board. But the grasslands is always a significant area and quickly (before the rain) to collect dry grass conventional rake even a few very agile workers is not always possible.

In such circumstances, not to condemn the hay to spoilage, I made mechanized (albeit hand-drawn) wide-swath rake. The basic material for them was the water pipes of different diameter. Since the diameter of such tubes is generally measured in inches, when describing the design of the rake not going to deviate from this rule. Just remember that the size of this is relative and does not indicate the outside diameter of the pipe, but rather, holes in it, but also approx. This size is called a conditional pass. For example, half-inch pipe has an outside diameter of 21.3 mm and an inner (light) to 15 mm (although, as you know, 1″ equals 25.4 mm, so 1/2″ is 12.7 mm). However, these diameters may slightly vary depending on the thickness of the pipe wall.

 

Wheel rakes

Wheel rakes:

1 — pole; 2 — lever; 3 — rod; 4 — brace; 5 — stand; 6 — rake; 7 — a nave; 8 — axis; 9 — the wheel (from the cultivator KRN)

This circumstance has forced me to pick up a pipe as a material for the manufacture of parts of the rake so that the outer diameter of one of the mating elements meet the inner other.

But even after this selection of some of the details are not inserted into the other without gap. Then I put the bushing on a steel cylindrical rod and rattling its surface, repeatedly twisting it. The same operation for a small increase in the internal diameter of the sleeve can produce your round or half round file.

In the manufacture of rakes, in addition to common hand tools: hammer, hacksaw for metal electric drill set of drill bits needed welding. She I had. Therefore, some of the nodes, which otherwise could be done on demountable fasteners, made molded, welded — so it was easier.

The design is reminiscent of horse-drawn rake, only their size is smaller and the device easier. Simplicity achieved by the fact that the nozzle rotating and even rotating parts (wheels) on their axles produced without bearings, as the latter would complicate the product. For easy transport of the rake from the windrow with the hay design provided for folding.

Make like a rake on these drawings handyman, owning welding, not much difficulty will be. But some features of their production all note.

 

The layout of the rake

The layout of the rake:

and, in transport condition; b — in the working position
 

Strut with the strut

With the strut brace:

1 — sleeve (tube 33,5×3,2, 2); 2 — cross member (tube 21,3×2,8); 3 — bushing crossmember (pipe 26,8×2,8); 4 — brace (tube 21,3×2,8); 5 — leg (tube 26,8×2,8, 2); 6 — bushing (pipe 33,5×3,2, 2)

 

Traction, and its hinged connection with brackets

Craving and its hinged connection with brackets:

1 —pull (tube 21,3×2,8); 2 — M8 bolt; 3 — nut M8 (2 PCs); 4 — bracket; 5 — the console rake

 

Tongue

Pole:

1 —arm (tube 21,3×2,8); 2 — pole (pipe 26,8×2,8); 3 — bracket (St3, the sheet s5,2pcs); 4 — emphasis (St3, the sheet s5, is performed with the size of the POS.Z without hole); 5 — adapter sleeve (tube 33,5×3,2)

 

Lever lifting-lowering of the rake

Arm lifting-lowering of the rake:

1 — lever (St3, strip 30×4) 2 — handle (St3, rod d12)

 

Rake

Rake:

1 — the console (the pipe 26,8×2,8;); 2 — bracket; 3 — tooth (45 steel, rod d8,17 PCs.)

 

Drilling in the tube console, rake holes for the teeth is better done on the machine. Then once you can drill holes with a diameter of 8 mm. the Axes of the holes in this case will guarantee parallel to each other and lie in one plane. I have the same machine, and this operation was produced in two passes — the first drill bit with a diameter of 4 mm, while being careful as possible to observe the parallelism of the axes of the holes.

Swivel with lever and console rake thrust both of its end tapered, drilled holes here and Stoch ends under radius. Did the same and at one end of the strut.

Before welding the parts with the bushings the ends are first processed through the arc of the outer diameter of the second. By the way, the drawbar to the axle can be welded without bushing.

Before welding the uprights to the tie bar should be worn, the bushing of the strut. In the manufacture of rakes before installing the teeth into the holes on console last need to wear the top cartridge racks. One sleeve must be placed between the 7th and 8th teeth and the other between 10-m and 11-m. the Lower bushing on the axle stands should be worn simultaneously with the sleeve hitch. Bushing drawbar is welded to the axle. The displacement of the bushing along the axis of the strut to limit welding to it next to the bushings wire rings (two half rings). The same rings offset is limited to inside of wheels with a diameter of 300 mm from the cultivator KRN (will fit others, but with a diameter of 500 mm, otherwise you’ll have to increase the sizes of other components and parts). The outside wheels on axis are mounted the thrust washers of inch pipe and zaspirtovannaya.

 

Axis

Axle:

1 — cotter pin 6,3×45 (2); 2 — thrust washer (tube 33,5×3,2, 2); 3 — restrictive ring (consists of two half-rings) (rod d6,6 PCs); 4 — pole transitional bushing; 5 — axis (pipe 26,8×2,8)
 

Hub

Hub:

1 disk (45 steel, sheet s5); 2 — bushing (pipe 33,5×3,2);
D and d are the holes in the wheel disc

 

Installation of the wheel strut and the hitching axis

Installation of the wheel strut and the beam axis:

1 — axis; 2 — pole transitional bushing; 3 — hub; 4 — separation ring (each of two semi-rings); 5 — hub; 6 — wheel (rim and disc) with the bus; 7 — Circlip; 8 — pin; 9 — a bolt of fastening of a wheel

 

Diameters of the used pipes

The diameters of the pipes

 

Some complexity may appear the choice of location of the second hole on the lever under the top end thrust. His place must match course rod bracket on the console from the raised position to the rake lowered to the ground level of the ends of the teeth.

Each swivel joint consists of a bracket, a bolt with two M8 nuts and the movable part (end of the pull rod or lever). The average nut is fixed by crushing the thread in position, providing a small gap between it and the movable part. Instead of the second hex nuts at each joint, you can use the wing— did not need open-end wrench. These swivel use with folding design for transport. To do this, Unscrew the outer nuts on both ends and thrust the lower end of the brace strut.

Dimensions rake in the folded (transport) position 1060х400х 1640 mm. nya Despite the fact that all parts steel rake turned out not-so-heavy — their weight is only 20 kg.

The most effective rake with a yield of dry weight of hay to 15 quintals per hectare for mowing a variety of manual by mechanized mowing or using power tillers. At higher yields the length (height) of the teeth of the rake should be increased to 700 — 800 mm. the Use of a rake allows you to rake the hay in swaths, with the area of 0.5 ha for 1 hour with a minimum of waste. Such a rake is easy to adjust under mechanical traction.

A. MASTERENKO, G. Kotelnikov, Volgograd region

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