SU1400534A1 - Cutting apparatus for lawn mower - Google Patents

Abstract

The invention relates to agricultural and municipal engineering, which improves the quality of mowing of laid grass. The cutting device contains a disk 1 with knives 2, shovels 3, executed in the form of U-shaped boxes installed above the cutouts in the disk. The lower edges of the parallel shelves of the U-shaped box are installed along the edges of the cutouts 7. The ends of the U-shaped boxes. located closer to the center of the disk, closed with plugs 6. The disk 1 is fixed on the drive shaft by means of a bolt, made stepwise. An adjusting washer is installed between the bolt's step and the shaft end, and an elastic element is installed between its head and disk 1. When the cutting device is operated with an outer plate, the air above the disk is drawn into rotational motion and is thrown away from the disk, ensuring transportation of cut grass. As a result, a vacuum is created in the action area of the shelves, and the air begins to flow from the space above the disk, the internal shelf also draws air into the rotational movement and throws it away from the disk, creating discharge in the duct. Under the disc, a vertical flow of air is directed towards the notch. This thread lifts the laid grass, which is cut by the blades of the cutting unit. 1 hp f-ly, 3 ill. i (L

Description

d

 1eE

FIG. I

/-/four

SL

// 7l V //// 7У // уу 7 //

And I

T 7

at 7

The invention relates to agricultural and municipal engineering, and more specifically to the construction of grass mowing devices.

The purpose of the invention is to improve the quality of grass mowing.

Figure 1 shows the proposed lawn mower, top view | in Fig.2 a section aa in Fig.1; FIG. 3 shows the assembly of the knife body.

The device comprises a cutting apparatus with a knife body in the form of a figured disk 1 and knives.2, hinged to the blades 3, which are high in zid of D-shaped boxes. Blades 3 have two parallel shelves: outer.4 and inner 5 The ends of the U-shaped boxes located closer to the center of the discs are closed with plugs 6. The disk has radial notches 7, and the blades 3 are set relative to the notches 7 so that the bottom the edges of their shelves 4 and 5 are located along the edges of the cutouts

The blade 1 of the mower unit is fixed to the shaft 8 by means of a bolt 9, which is wrapped in a threaded hole drilled along the shaft axis. The bolt 9 is made stepwise, and an adjusting washer 10 is installed between the step of the bolt and the shaft end, and an elastic element 11 is installed between its head and the disk 1, for example, an elastic conical washer.

During operation of the cutting apparatus, rotation from the engine is transmitted to disk 1 and grass stalks, the height of which exceeds the distance from its knives 2 to the surface of the soil, are cut.

In this case, the outer shelf 4, the air above the disk, is drawn into rotational motion and, under the action of centrifugal forces, is thrown away from the disk, ensuring the transportation of cut grass. As a result, in the zone of action of the shelves 4, a vacuum is created and air is supplied to these shelves from the space located above the disk 1. In addition, the internal shelf 5 also causes the air inside the U-shaped box to be rotated and centrifugal. discarded from the disk, creating a vacuum in the box. Since the top of the end box is closed, then

0

five

0

five

0

five

0

five

0

five

The vacuum is transmitted through aphoxy 7 under the disk and under the disk a vertical stream of air is directed towards the notch. The vertical air flow lifts the stems of the laid grass, they enter the zone of action of the knives 2 and are cut off.

When knives of the proposed cutting apparatus meet with obstacles, such as a metal object, the cutting member 1 stops and the shaft 8 continues to rotate with the drive mechanism. After the solid object remains behind the cutting apparatus, under the influence of a frictional force occurring between the end face of the shaft 8 and the knife body 1, the latter is again engaged in a rotary motion.

The expansion of the blades in the form of a U-shaped box with two throwing plates and a closed end, as well as the location of these blades above the chambers in the disk, allows increasing the vacuum created under the notches.

I

The air intake to the internal blades in this case is carried out only from the space located under the disk, as it is separated from the supra-disk space by the box and cap 6. This creates a vertical air flow moving through the cutouts 7. to the plates 5, ensuring lifting more yellow laid stalks and their supply to the blades of the cutting apparatus.

Claims (2)

Invention Formula 1, The mower cutter containing a blade with knives, which is bolted to the end of the drive shaft, the disc provided with radial cuts and blades, characterized in that 5 in order to improve the quality of mowing of laid grass, the blades are made in the form of shaped boxes, parallel shelves which are installed above the cut, and the end of the box, located closer to the center of the disk, is made closed. i 2. The device pop, 1, is distinguished by the fact that, in order to improve reliability of operation, the disk-To-bolt of the shaft end is made stepwise, while an elastic one is installed between the head of the bolt and the disk. th U005344 element, and between the bolt level and the shaft end, an adjusting washer is installed. 1 eight