RU55535U1 - MOWER ROTARY - Google Patents

Abstract

The proposed utility model relates to agricultural engineering, namely to mounted devices of motor units, and can be used for mowing crops, grasses and small single bushes in the conditions of peasant farms, etc., including in conditions of inconvenience on rough terrain . The purpose of the utility model is to improve the quality and productivity of the mowing process by eliminating knife re-sharpening in the field. The rotary mower contains a frame 1, which is a welded construction of pipes, intermediate gears 2 and 3, supporting skis 4, two gears 5 s, mounted on the shafts of the gears using quick-release fasteners 6, disks 7, rotating in different directions. On the disks 7, symmetrically with respect to the axes of rotation, knives 9 with cutting edges 10 are pivotally mounted on the axes of rotation 8. The knives 9 can be made symmetrical with respect to the axes of rotation 8 and, using the spring 11, be in a longitudinal position with the formation of a cutting edge 10 of the knife 9 to extend the radius disk 7 or star-shaped. 4 ill.

Description

The proposed utility model relates to agricultural engineering, namely to mounted devices of motor units, and can be used for mowing crops, grasses and small single bushes in the conditions of peasant farms, etc., including in conditions of inconvenience on rough terrain .

Known cutting apparatus of the rotary type, containing a shaft on which with the help of rings fastened cutting elements are fixed (SU 1402280 A1, 30.06.86.).

This cutting apparatus as a part of the mower does not provide the necessary quality and productivity of the mowing process due to the need for frequent sharpening of knives in the field.

Also known is a cutting apparatus comprising a disk rotor with knives pivotally mounted on it around the circumference by means of rotation axes, each of which is spring-loaded relative to the rotor disk in the plane of its rotation to a stop placed in a sector groove made in the rotor and

located concentrically to the axis of rotation of the knife, and the spring is made with adjustable stiffness (SU 1140703 A1, 05/10/83.).

The presented cutting apparatus as part of a rotary mower does not provide the desired quality and productivity of the mowing process due to the need for frequent sharpening of knives in the field.

The closest in technical essence and the achieved effect is a rotary mower containing a frame, gearboxes with disks mounted on their shafts, rotating in different directions, with knives pivotally mounted using rotation axes with a cutting edge mounted on the disks symmetrically with respect to the rotation axes of the latter, supporting Skis and operator's guard (SU 2213441 C2, 2003.10.10.).

When the plane of the rotors is located in this high-speed mower, the cutting height of the plants decreases at an acute angle to the surface to be treated, but the frequency of knives hitting the stones and the unevenness of the soil increases many times. This leads to a rapid blunting of the cutting edge of the knives, to the lack of the necessary quality and productivity of the mowing process due to the need for frequent sharpening of knives in the field, to high energy consumption.

The purpose of the utility model is to improve the quality and productivity of the mowing process by eliminating knife re-sharpening in the field.

The solution to the problem is achieved by the fact that in a rotary mower containing a frame, gearboxes with disks mounted on their shafts,

rotating in different directions, with knives pivotally mounted by means of rotation axes with a cutting edge mounted symmetrically on the disks relative to the rotational axes of the latter, support skis and operator guards, characterized in that the disks are mounted on the shafts of the gearboxes using quick-release fasteners, and each knife has two cutting edges. The knives can be made symmetrical with respect to the rotation axes and spring-loaded in the longitudinal position to form a blade radius extension or star-shaped with the cutting edge of the knife, each star tip having a cutting edge at least on one side and the knives spring-loaded to form the continuation of the disk radius with the cutting edge.

The proposed rotary mower is illustrated by the drawings shown in figures 1-4.

Figure 1 shows the kinematic diagram of a rotary mower;

figure 2 - one-sided knife with two cutting edges;

figure 3 - double-sided knife with four cutting edges;

figure 4 - star-shaped knife.

The rotary mower (Fig. 1) contains a frame 1, which is a welded pipe structure, intermediate gears 2 and 3, supporting skis 4, two gears 5 with gearboxes mounted on the shafts of the gears using quick-detachable fasteners 6, disks 7, rotating in different directions . On discs 7, symmetrically about the axes

rotation, pivotally mounted on the axis of rotation 8 of the knives 9 with cutting edges 10 (figure 2). The knives 9 can be made symmetrical with respect to the rotation axes 8 and, using the spring 11 (Fig. 3), be in a longitudinal position with the formation of the cutting edge 10 of the knife 9 to extend the radius of the disk 7 or star-shaped (Fig. 4), with each apex of the star having a cutting edge 10 and the knives 9 are fixed by a spring 11 with the formation of the cutting edge 10 of the opposite top of the star continuation of the radius of the disk 7.

The mower operates as follows.

The torque from the power take-off pulley of the motor unit (Fig. 1) is transmitted by a belt drive to the intermediate gear pulley 2, then by gear reducers 2 and 3 to the driven gear gears of the reducers 5. When the motor unit moves forward, the rotating disks 7 with cutting knives 9 mow the vegetation in front of them and dump her in the roll. The hinged fastening on the disks 7 using the rotation axes 8 of the knives 9 causes them to be pulled by centrifugal force when the disks 7 rotate, and when foreign objects get in, deviate without collapsing, after which they will again take their former position (Fig. 2). When the cutting edge 10 is dull on one side of the knives 9, the disks 7 are quickly interchanged with the fastening fasteners 6 and the cutting edges 10 on the other side of the knives 9 begin to work. The service life of the knives 9 is doubled in the field.

If the knives 9 are made symmetrical with respect to the rotation axes 8, then, when the cutting edge 10 is dull on one side of the knives 9, re-hooking the springs 11, (Fig. 3) the peripheral part of the knives 9 changes from the central one and the cutting edges 10 on the other side of the knives 9 begin to work. When they are dull, the disks 7 are quickly interchanged with the help of quick-release fasteners 6 and the cutting edges 10 on the other side of the knives 9 start working. Then, re-hooking the springs 11 so that, returning the peripheral part of the knives 9 to the central position, I start working cutting edges 10 on the other blades 9. The service life of the blades 9 without regrinding field increases fourfold.

If the knives 9 are made star-shaped (Fig. 4), with each apex of the star having cutting edges 10, then with successive re-hooking of the vertices by the spring 11, the cutting edges 10 will sequentially work on one side of the star. When they are dull, the disks 7 are replaced with each other using quick-release fasteners 6 and the cutting edges 10 on the other side of the 9 star knives begin to work. The service life of knives 9 without re-sharpening in the field increases in this case eight times.

As a result of this design, by eliminating the re-sharpening of the cutting edges of the knives in the field, ease of maintenance is achieved, operational reliability is improved, the quality of the cut is improved, and unproductive energy costs are reduced.

Claims (3)

1. A rotary mower containing a frame, gearboxes with disks mounted on their shafts, rotating in different directions, with knives pivotally mounted using rotation axes with a cutting edge mounted on the disks symmetrically with respect to the rotation axes of the latter, supporting skis and intermediate gears, characterized in that the discs are mounted on the shafts of the gearboxes using quick-release fasteners, and each knife has two cutting edges. 2. The rotary mower according to claim 1, characterized in that the knives are made symmetrical with respect to the rotation axes and spring-loaded in a longitudinal position with the formation of a knife edge to extend the radius of the disk. 3. The rotary mower according to claim 1, characterized in that the knives are star-shaped, with each apex of the star having a cutting edge at least on one side, and the knives are spring-loaded to form a continuation of the radius of the disk with the cutting edge of the star's tip.