SU854306A1 - Device for cutting tops of root crops in soil - Google Patents

Description

(54) DEVICE FOR TRIMMING ROOT CROPS

ON THE CORN

I

FIELD OF THE INVENTION The invention relates to agricultural machinery, in particular, devices for trimming root crops of root crops used in machines for harvesting root vegetables and their leaves.

Known to the booster cutting apparatus, containing the shaft, carrying the topstow casing with a fixed in the lower part of the knife, made a disk and fixed to the casing rigidly 1.

A disadvantage of the prior art apparatus is that it quickly fails when the knife contacts stone or other hard objects, and the replacement of a worn knife is a laborious operation.

The closest to the invention in terms of technical dryness is a device for trimming the tops of root crops at the root, containing, its shaft, a supporting top-to-bottom casing with hinged saber knives 2 in its lower part.

However, the knives of the device also quickly lose their cutting properties or are worn out.

The purpose of the invention is to increase the reliability of the device.

This is achieved by the fact that the device is equipped with a crank-crank mechanism by which the saber-shaped knives are connected to the shaft, and the toothed-out casing is mounted on the shaft freely and is connected with it by an elastic element.

FIG. 1 shows a device for trimming the tops of root crops on the vine, side view; in fig. 2 - the same, top view.

The device contains an inclined drive shaft 1, on the lower end of which Lodilo 2 is rigidly fixed. On the inclined drive shaft 1 there is a loosely mounted toothed-top casing 3, on the lower base of which there is a pair of brackets 4 to which the knives 6 are fixed by means of a hinge 5 .5 The knives 6 have a cutting 7 and an inner 8 part. On the inner part 8 of the knives 6 there is a longitudinal groove B, in which the finger 9 of the carrier 2 is mounted. A topshell 3 is mounted on the drive shaft 1 in the hinge 10 and connected to the drive shaft 1 20 through an elastic element made in the form of a female drive shaft 1 twisted springs 11. Vita spring and its lower part is associated with carrier 2, and the upper -

with a topshield and a casing 3. The spring 11 has a preliminary twist, which is provided during assembly of the device when the topshift casing 3 is rotated and the grooves B of the inner part 8 of the knives 6 are subsequently pushed into the fingers 9 of the carrier 2 and the cutting part 7 of the knives 6 into the stops 12 located on the brackets. 4. The force of the preliminary twisting of the spring 11 is greater than the required effort to cut the tops of the root crops and vegetation, the floor on the surface.

Thus, the carrier 2 with the fingers 9 and the knives 6 fixed with hinges with the longitudinal grooves B for the fingers 9 form the curl-like mechanisms connecting the knives 6 with the shaft 1.

The device works as follows.

The torque is transmitted through the drive shaft 1 and the carrier 2 to the fingers 9, which rotate the knives 6 and through the spring 11 to the topper cover 3. In this case, the rotating cutting parts 7 of the knives 6 cut the tops of the root crops and the plants 3 located on the floor and throw away the cover 3 them to the maschine transporting organs. When a rotating cutting part of the knife 6 encounters a fixed obstacle B, the cutting part 7 stops. The inclined drive shaft 1 with the carrier 2, through the fingers 9 located in the grooves B, continues to move the inner 8 part of the knife 6 in the direction of its rotation. At the same time, the casing 3 with the brackets 4 under the action of the forces of the twisted spring 11 also moves in the same direction, dragging the middle part of the knife 6 mounted in the hinge 5. At the same time, the cutting 7 part of the knives 6 rotates around the hinge 5 and passes by obstacles B, interfering with their rotation (Fig. 2, the position of the

apparatus with folded knives shown dotted). In this position, the Vita spring 11 twists through some additional angle and thereby prevents the occurrence of peak loads in

the cutting apparatus leading to its emergency breakdowns. Since the speed of rotation of the knives of the cutting apparatus is significant, all knives 6 in the folded state have time to pass obstacle B without breakage. The angle of deviation of the knives 6 from the working position depends on the length of its groove B.

Thus, the linkage of the knives with the shaft eliminates their accidental breakdowns, increases the life of the knives

before replacing them, which leads to increased reliability of the device.

Claims (2)

1.Avanesov Yu. B. and others. New beet harvesters. M., “Kolos, 1968, p. 137. 2. Petrov G. D. Potato harvesting machines. M., “Mechanical Engineering, 1972, p. 7173. & figure 2.