RU187113U1 - Heavy Duty Spring-Tooth Harrow - Google Patents

Abstract

The harrow contains a towing device connected to the frame, transport (working) wheels. A shortened middle beam is rigidly mounted on the rear of the hitch, and rotary bars are connected to the middle beam via articulated joints, forming a U-shaped frame. On both side bars there are articulated wheels. Hydraulic cylinders installed at the junction of the side beam and the wheel are responsible for the function of turning and folding the harrow, thanks to the directional turn of the side bars, the harrow always unfolds in the “right direction” regardless of the field topography, and the flexible coupler system prevents folding of the unit during operation. The working spring sections are mounted on the middle and side bars of the harrow by means of articulated engagement, the lowering and raising of the sections is carried out using the hydraulic cylinders installed on each section, a special locking mechanism actuated by the same hydraulic cylinders is responsible for rigidly fixing the spring sections in the required position sections. The harrow has a transport dimension of 2.5 meters.

Description

The utility model relates to the field of agricultural engineering, in particular to tillage tools for surface tillage, for example, harrowing.

A wide-grip tooth-spring harrow is known, containing a frame made of rectangular pipes in one piece with a towing device, which is supported by two pneumatic wheels mounted on it movably by means of knee-shaped levers, which are fixed on the frame by lanyards connected to it through brackets fixed on the frame motionless. A movable middle rotary beam is mounted on the rear rectangular tube of the frame, which is fixed to it by two hydraulic cylinders through brackets fixed motionless on this middle rotary beam. At the ends of the middle rotary beam mounted swivel joints made in the form of cardan joints, on which lateral rotary bars are mounted, at the opposite ends of which the impellers are mounted by means of parallelogram mechanisms and lanyards, and transport wheels are mounted on the front walls, which are mounted at an angle inward in the direction movement of units. The extreme ends of the side swivel bars are connected by braces made of metal pipes with the front of the frame. In this case, the stretch marks consist of 2 parts: the front ones are short, which are fixed at one end rigidly to the frame, and traps and latches are mounted at the second ends, the mobility of which is limited by the springs mounted on the fingers connecting the latches to the brackets mounted fixedly on the front - the short parts of the stretch marks, and the back - long ones, in which the front ends are movably connected to the U-shaped leads that are mounted movably on the unit frame, their second ends are movably fixed at the extreme ends of the side swivels x bars. The inner ends of the latches, through cables, through compensation springs with limiters are connected to the middle rotary beam, on the middle rotary and lateral rotary bars through the clamps through elastic bars the working sections are fixed, which consist of rectangular frames with movable 3rd or 5th mounted on them - by pipes, on which paired spring teeth are installed in a certain order, brackets are fixedly fixed on the pipes, interconnected movably by a bar, which by means of a EPA is fixed on the rectangular frame of the working sections of the harrow (heavy hydraulic powered tooth harrow BZGT-25 (BZGT-21, BZGT-19, BZGT-15) “VICTORY” www.anitim-oao.ru).

The disadvantages of these wide-grip spring-loaded harrows is that there are no horizontal rotary axes in the braces. This leads to overloads in stretch marks up to their breakdowns. The same thing happens when transporting such units on rough roads, especially when moving through high road embankments, etc. The disadvantage is the lack of latches on the latches, which are necessary for their fixation when performing technological lifting of the harrow sections during turns or turns. In the absence of these clamps, if the machine operator fails to turn off the oil supply to the hydraulic cylinders of the heavy gear spring harrow in time, the compression springs on the cables connecting the middle rotary bar with the latches will compress completely, which will lead to the rotation of the latches and the subsequent disconnection of the stretch marks, resulting in the harrow folding, and the arrangement of the working bodies of the harrow sections in the working position, breakdown of these working bodies is possible.

A wide-grip heavy gear-spring harrow is known, containing a towing device connected to the frame, transport and impellers, a middle rotary beam with working sections is installed behind the rear tube of the frame, to which lateral rotary bars are connected through articulated joints in the form of cardan joints located at its ends. with working sections, the extreme ends of the side swivel beams are connected to the front of the frame by braces consisting of two parts: the front - short, one ends of which are attached to the frame not movably, at their second ends, catchers and latches are mounted, the mobility of which is limited by springs mounted on the fingers connecting the latches with brackets fixedly mounted on the front short ends of the stretch marks, and the rear ones are long, some ends of which are movably connected with U-shaped leads installed movably on the frame, their other ends are movably fixed at the extreme ends of the lateral rotary beams, characterized in that in the rear long parts of the stretch marks next to the vertical axes of the connection of these parts There are horizontal axes for the stretch marks with U-shaped leads, and latches are installed on the fingers of the springs on the latches side, made in the form of corners with recesses, which they engage before the harrowing with finger grooves mounted directly on the brackets mounted on the short parts of the stretch marks.

The disadvantages of this wide-grip heavy gear spring harrow is that the extensions are made in the form of hollow steel pipes, consisting of two parts: front - short and rear - long, which complicates the design of the harrow. Also, there is a high probability of breakage of these stretch marks when working with an uneven field surface, etc. The disadvantage is that the gear-spring sections are rigidly fixed to the side and central bars, and to translate them into working position, it is necessary to turn both the side and central bars. The design flaw is also the mechanism for turning the harrow to the working position, and vice versa, the side rails diverge in opposite directions without any directional force, which in the hilly terrain of the field can lead to the turn of the rails “inward” of the U-shaped structure. A significant structural drawback is the large transport dimension; in the transport position, the unit is four meters wide, which makes it necessary to use the services of escort vehicles when transporting the harrow on public roads.

The purpose of the utility model is to prevent breakdowns of stretch marks in wide-grip heavy gear-spring harrows when driving on uneven roads and in the process of harrowing fields with an uneven surface, as well as changing the mechanism of turning the harrow to the working and transport position, introducing a new system for lowering / raising the working sections to the working position and reducing the size of the unit in the transport position.

The goal is achieved by the proposed design, in which instead of rigid stretch marks from metal pipes, flexible cables are used in the working position, the tension of which is carried out by lowering the stretch marks on the drawbar with its further fixation in the downy position, which does not allow the harrow to fold during operation.

A distinctive feature of the harrow is the new mechanism for turning the harrow to the working position, the side rails diverge in opposite directions under the action of a given applied force, which arises as a result of the hydraulic cylinders mounted on the pivotally mounted swivel wheels, thanks to which the direction of rotation is set, which ensures the deployment of the unit in conditions hilly field.

A design feature is the articulated spring sections, the lowering / raising of which is carried out using the installed hydraulic cylinders for each section, the locking of the sections in the working position is carried out through a series of levers and latches, the operation of which is directly connected with the sectional hydraulic cylinders.

The innovation of the proposed solution is a reduced transport dimension. The central beam is reduced to 2.5 meters. In the folded position, the total size of the harrow is 2.5 meters, which allows the harrow to be transported on public roads without escort vehicles.

Thus, all of the above signs are necessary, new and serve to achieve a positive effect, which allows us to conclude that the proposed technical solution has novelty and significant differences.

The essence of the utility model is illustrated by drawings.

In FIG. 1 shows a wide-grip tooth harrow in the working position, FIG. 2 shows a working section, in FIG. 3 shows the mechanism for securing the section in the working and transport position.

A wide-grip tooth harrow consists of a frame 1 with a tow hitch 2, supported by two pneumatic wheels 3, a middle beam 5 is fixedly mounted in the rear of the frame 1, hinges 6 are mounted on the edges of the middle beam 5, on which side bars 7 are installed, at the ends of which with the ends of the mounted impellers 8 are pivotally mounted that perform the function of turning the harrow by means of rotary hydraulic cylinders 9, the extreme ends of the side rails 7 are connected by flexible braces 10 with a towing device 2 of the frame 1, the braces are stretched and the harrow is fixed by the side rails 7 in the deployed position by lowering the stretch of cables 11 onto the frame 1, which is fixed by the latch 12. On the middle beam 5 and side rails 7, the working sections 13 are mounted by means of a hinge, which consist of a rectangular frame 14 with movable pipes mounted on it 15, on which spring teeth 16 are mounted in a specific order 16. Brackets 17 and 18 are fixed to the pipes 15, by which, by means of the lever 19, the angle of attack of the teeth 16 can be adjusted, a bar with the eye 20, to which the lifting hydraulic cylinder 21 is connected, the other end of the lifting hydraulic cylinder 21 is connected to the eye 27 of the section fixing mechanism 23. The fixing mechanism 23 through the mounting plates 22 is fixedly fixed by step ladders 28 to the side bars 7 and the middle beam 5, the sections 13 are fixed by pressing cylinder 21 to the rod 25 through the lever 26, latching the latch 24.

Wide-angle gear spring harrow works as follows. Before the harrowing begins, the harrow, which is in transport position in the unit with the tractor, is mounted on the edge of the field, after which the unit begins to move backwards at the same time feed the tractor hydraulic oil into the rotary hydraulic cylinders 9 of the harrow, under the action of the force acting from the hydraulic cylinders 9, the side bars 7 with workers sections 13 begin to move apart, turning along the front to a straight line, after which they feed oil again, but already in the lifting hydraulic cylinders 21 of the working sections 13, the sections are lowered, after the section has completely lowered 13 (touching the soil), the hydraulic cylinder 21 continues to press, but already on the eye 27 of the locking mechanism 23 sections 13, the eye under the action of the hydraulic cylinders 21 presses on the rod 25 through the lever 26 and latches the latch 24 of the working section 13, after lowering the sections, stretching the cables 11 lowers onto the frame of the harrow 1 and is fixed by the latch 12, thus pulling the cables 10 and, preventing the folding of the harrow during operation. The unit is ready for operation. To transfer the wide-grip heavy gear-spring harrow to the transport position, the unit is stopped, then, by supplying oil to the hydraulic cylinders 21, the working sections 13 are released from the latches 24 of the locking mechanism 23, after this section, at the same time, I release the stretching of the cables 11 from the clamp 12, thus relaxing Thus, the cables 10, then begin to move the unit forward while supplying oil to the rotary hydraulic cylinders 9 until the side bars 7 are folded until they are parallel to each other. The harrow is ready for transportation.

Literature

1. RU 2488986 C1 MPK А01В 19/00, А01В 25/00 Wide-grip heavy gear-spring harrow / V.A. Geer, S.V. Geer, A.B. Ilyichev - No. 2012108657/13, stated on March 6, 2012.

2. RU 2511945 C1 MPK A01 B 19/00, A01B 23/04, A01B 73/02 Wide-cut tillage unit / V.A. Geer, S.V. Geer - No. 2012155426/13, declared December 19, 2012.

Claims (1)

A wide-grip heavy spring-loaded harrow containing a tow hitch connected to the frame and transport wheels, a middle beam shortened to 2.5 meters is installed on the rear tube of the frame with a hinged section and a locking mechanism for this section in the working position, to which through hinged joints located on at its ends, side bars are connected with articulated sections, the raising and lowering of which is carried out using hydraulic cylinders, transport wheels are installed at the ends of the side bars , Which is controlled during a turn harrows, rotary cylinders, the extreme ends of the bars are connected to the front portion of the flexible extensions, the tension of which in the transport position is carried out by means of locking in the horizontal position, latch cables.

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