RU216530U1 - Hydroficated harrow hitch - Google Patents

Abstract

The utility model relates to agricultural engineering, in particular to a trailed hitch for harrows, and can be used to assemble hydrofed tractor units that perform spring and autumn pre-sowing work, post-sowing work for combing small weeds and caring for fallows. The technical result is to increase the reliability of the device. To achieve the stated technical result, it is proposed to create a harrow hitch, including a drawbar with a towing device, resting on pneumatic transport wheels with its rear part, a central swivel bar connected to the drawbar by two hydraulic cylinders and by means of a swivel joint, trailed swivel side bars with running wheels pivotally attached to the central swivel bar with the help of crosses, chain extensions at the ends of the side bars, which are attached to the front of the sash. In swivel joints, in crosspieces, channels for lubrication are provided and grease fittings are installed. At the same time, in the front part of the rib there is a beam with a locking pin for fixing the trailed side bars in the transport position. Arrows with brackets are installed on the trailer and central bars, on which the BZS-1.0 or BZT-1.0 harrows are suspended in two rows using chains. 3 ill.

Description

Technical field

The claimed utility model relates to agricultural engineering, in particular to a trailed hitch for harrows, and can be used to compile hydraulic tractor units that perform spring and autumn pre-sowing work, post-sowing work for combing small weeds and caring for fallows.

State of the art

A wide-cut tillage unit is known from the prior art (see patent RU 2511945 dated 04/10/2014), including a frame with a towing device, the rear part resting on pneumatic wheels, an average swivel bar fixed by hydraulic cylinders to the frame, side swivel bars with working and transport wheels, U-shaped leashes, extensions, consisting of 2 parts, front - short and rear - long, with fingers, springs, traps and latches, characterized in that fixedly replaceable paired racks or replaceable single long racks with teeth are mounted on the swivel bars. zigzag harrows, fixed with anchor chains, adjustable in length, stretch marks have retainers in the form of corners with cutouts interacting with grooves on the fingers mounted motionless on brackets mounted on the short parts of the stretch marks, and their rear long parts from the attachment side with U-shaped leashes equipped with horizontal axes. The disadvantage of the known device is the complexity of the design, due to the presence of additional side wheels, U-shaped leashes and folding side swivel bars back.

A trailed hitch for surface tillage tools is known (see patent RU 187391 U1 dated 03/04/2019), containing an isosceles triangular carrier frame having parallel end sections protruding beyond its base, based on dual support and transport wheels, each of which is spaced apart along different sides of the parallel end sections. Dual support wheels are placed on one axle, the axle is mounted with the possibility of turning its ends in a vertical plane and consists of two half-axes rigidly fixed to the ends of a flat traverse placed inside boxes installed on parallel end sections of the frame. A hole is made in the center of the sidewall of the traverse, in which the bushing is located, the axis of rotation of the traverse is installed in the bushing, connecting it with the box, the bushing protrudes beyond the side surfaces of the traverse and is fixed to them with ribs, locking recesses are made along the lower side edge of the traverse with bushings placed in it, in which the bolts of fastening the latter to the box are installed. The axis of rotation of the traverse contains a channel for laying lubricant. The disadvantage of the known device is also the complexity of the design.

The closest in technical essence to the claimed device is a soil-cultivating harrow - hitch (see patent RU 192367 U1 dated 09/13/2019), including a frame with a towing device, supported by the rear part on pneumatic wheels, an average swivel beam connected to the frame by hydraulic cylinders, side swivel bars with working and transport wheels and sections of toothed harrows and extensions, the middle swivel hitch bar, connected by a hydraulic cylinder to the frame, is pivotally mounted on the axis of the back side of the frame using two additional levers-stops, while the axis of the rear side of the frame is articulated with the levers-stops equipped with friction split bushings that do not require lubrication. The teeth of the harrow of each section are spring-loaded, mounted on the rotary axes of the section frame and adjustable in inclination angle by means of a mechanism for turning the teeth, made in the form of a lever connected to the drive rail of each axle. Before starting work, the harrow with the tractor is installed at the edge of the field and transferred from the transport position to the working position, for which, by turning the handles of the stoppers, the side bars are disconnected from the frame bracket beam. Further, by moving the tractor forward, the side swivel bars with harrow sections begin to move apart to the sides, turning along the front to a straight line. Then, with the help of a hydraulic cylinder, the middle and side rotary bars are rotated to the horizontal position of the harrow sections. The disadvantage of the known device is the complexity of the design due to the use of additional levers and special bushings that do not require lubrication. This complicates the production and assembly of devices, as it becomes necessary to replace standard parts with new ones. In addition, the design provides only one hydraulic cylinder, which negatively affects the reliability of the structure.

Utility Model Disclosure

The technical result is to increase the reliability of the device.

To achieve the stated technical result, it is proposed to create a harrow hitch, including a drawbar with a towing device, resting on pneumatic transport wheels with its rear part, a central swivel bar connected to the drawbar by two hydraulic cylinders and by means of a swivel joint, trailed swivel side bars with running wheels pivotally attached to the central pivoting bar with the help of crosses, chain braces at the ends of the trailer bars, which are attached to the front of the sash. In swivel joints, in crosspieces, channels for lubrication are provided and grease fittings are installed. At the same time, in the front part of the sash there is a beam with a locking pin for fixing the trailed swivel side bars in the transport position. Arrows with brackets are installed on the trailer and central bars, on which harrows are suspended in two rows using chains.

Brief description of the drawings

In FIG. 1 shows the proposed hitch in the deployed position.

In FIG. 2 shows the hitch in the folded transport position, where a is a side view, b is a top view.

In FIG. 3 shows the location of the channels for laying lubricant.

Implementation of the utility model

The proposed harrowing hitch consists of a drawbar (1) with a towing device (16) resting on the rear of the pneumatic transport wheels (7), a central swivel bar (2) connected to the drawbar by hydraulic cylinders (6) and by means of a swivel joint, trailed swivel side beams (3,4) pivotally attached to the central rotary beam with the help of crosses (5). At the extreme ends of the trailer bars (3,4) the running wheels (8) are mounted. The ends of the trailer bars (3,4) are connected by chain braces (9) to the front part of the drawbar (17) to keep them in the working position. There is a beam (14) with a locking pin (15) in the front part of the drawbar for fixing the trailer bars in the transport position. In swivel joints, in crosspieces, channels for lubrication are provided and grease fittings (18) are installed. Arrows with brackets (13) are installed on the trailer and central bars, on which harrows (12), for example, BZS-1.0 or BZT-1.0, are suspended in two rows using chains (10 and 11).

Harrow hitch works as follows.

Before starting work, the harrow with the tractor is installed at the edge of the field and transferred from the transport position to the working position, for which the trailer bars (3 and 4) are disconnected from the beam (15) of the link (1) and the trailer bars (3 and 4) are moved apart manually or with the help of a tractor. ) with harrow sections to the sides. Then, with the help of hydraulic cylinders (6), the central (2) and trailer bars (3 and 4) are lowered to the horizontal position of the harrow sections.

During the movement of the harrow, its teeth cut into the ground and begin to vibrate, as a result of which the lumps of earth are broken. The chain braces (9) keep the drawbars (3 and 4) deployed and do not allow them to go back.

The teeth of the harrows are arranged so that each of them forms a separate groove on the soil surface with a distance of 50 mm between them.

To lubricate the moving parts, oil is poured into the installed oilers.

The use of pneumatic transport wheels allows the hitch to be moved in the transport position on roads with any surface and ensures minimal impact on the soil surface during operation.

The technical result, namely the increase in the reliability of the device, is achieved due to the fact that the design provides channels for lubrication of moving parts, which will increase the service life of the device, as well as the presence of two hydraulic cylinders, which will increase the reliability of the device.

For ease of transportation, the hitch is delivered disassembled in large units. The main hitch units are all-welded, which are interconnected by quick-release pins, which makes it easy and quick to assemble and disassemble the hitch.

Claims (3)

1. Hydroficated harrow hitch, including a drawbar with a towing device, supported by the rear part on pneumatic transport wheels, a central swivel bar connected to the drawbar by two hydraulic cylinders and by means of a swivel joint, trailed swivel side bars with running wheels pivotally attached to the central swivel bar with with the help of crosses, chain extensions at the ends of the trailer bars, which are attached to the front of the drawer, characterized in that in the swivel joints, in the crosses, channels for lubrication are provided and grease fittings are installed. 2. The harrowing hitch according to claim 1, in which in the front part of the lash there is a beam with a locking pin for fixing the trailed rotary side bars in the transport position. 3. Harrow hitch according to claim 1, in which arrows with brackets are installed on the trailer and central bars, on which harrows are suspended in two rows using chains.

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