RU187653U1 - Double disc section hoe rotary - Google Patents

Abstract

The utility model relates to agricultural machinery, in particular to a device for surface tillage. The double-disc section of the rotational hoe consists of two removable rotary disks made of teeth radially expanding from the hub, with the shape of the working part of the tooth in the form of a curved blade and a stiffening rib on the back side, with a beveled edge on the inner end of the non-working part of the tooth, with two holes in each tooth for fastening them with bolts on both sides to annular disks having openings for each tooth, and also for fastening rotary disks to hubs with axes horizontally located at opposite ends different sides of the unequal rack, with an upward offset relative to the hinge, located closer to the rear end of the unequal rack, oriented in the direction of movement, included in the lower forked end of the curved rack, pivotally mounted in it and capable of rotation, while the rack connects to the opposite end through swivel with a bracket for attaching to the frame of the tillage implement and a spring element located on this bracket and brought forward about the course of movement, consisting of a coupling screw and compression spring.

Description

The utility model relates to agricultural machinery, in particular to a device for surface tillage.

Known working body of a rotary harrow-hoes according to the patent of the Russian Federation for utility model No. 157459 (АВВ 21/02, АВВ 21/04, published December 10, 2015), which is a pair of discs on the horizontal axes, while the discs of the pair are connected to the trailed frame and located one in front of the other, each under its own furrow. The discs are cast along with the teeth, which are needle-shaped, and the needle discs are mounted on a spring strut. The disadvantages of this technical solution are: work exclusively in difficult conditions; the lack of adjustment of the force of action on the soil, the dependence solely on the effort of the rack; low quality of soil cultivation due to insufficient copying of the relief and poor-quality removal of filamentous weeds; low maintainability.

Known working body of the tillage machine according to the patent of the Russian Federation for utility model No. 170226 (АВВ 21/04, АВВ 61/04, published December 30, 2016) consisting of a pair of cast needle discs located on opposite sides of the bracket one in front of the other, each under its own furrow. The disks are inserted into the bearing units and are fixed at opposite ends of the direction-oriented bracket. The bracket, in turn, is connected to the frame using a curved stand. The working body further comprises a protective spring connected via a rotary axis to the frame of the tillage machine. On the rotary axis, the discs are raised in the event of a collision with an unevenness (obstacle) in the topography of the cultivated soil. The disadvantages of this technical solution are: the use of "heavy" alloy wheels, and, as a result, a decrease in the quality of tillage; low maintainability of disks; the shape of the ends of the needles; use of tension springs.

Known working body of the tillage machine according to the patent of the Russian Federation for utility model No. 135220 (АВВ 21/04, published December 10, 2013), which contains a housing with bearing assemblies, a rack and disks mounted offset on one housing, curved teeth are fixed to the hubs of the disks, according to a utility model, the axis of the disks is inserted from different sides of the case with an offset relative to the hinge, and the curved teeth of the disks are evenly spaced around the circumference on the hubs of the disks of a square shape, while the case is pivotally connected to a rack in the form of a flat tape spring. Mounting the disks of the working body of the tillage machine can be implemented with the possibility of dismantling and reinstalling the disks with their rotation through 180 °. The disadvantages of this technical solution is the use of a flat ribbon spring to connect the housing to the rack, this type of connection is unreliable especially in the absence of an agricultural culture. The disadvantages include the lack of adjustment of the force exerted on the soil.

Known needle-type rotary harrow according to the patent of the Russian Federation for utility model No. 171976 (АВВ 21/04, published 06/23/2017). The needle-type rotary harrow contains a battery of pairs of disks attached by means of curved spring-loaded rods to a trailer frame made of a square section profile. On each disk, wedge-shaped bent teeth are fixed with an oblique cut with an oval surface. The disks are mounted in pairs at the ends of the articulated beam, oriented in the direction of movement of the harrow, and are located one in front of the other, each under its own furrow. The hinged rocker arms are made equal-shouldered, and also with the possibility of a 180 ° turn to transfer the teeth from the “active” state to the “passive” state. Curved rods are made with the possibility of lifting them up to “remove” the corresponding pair of discs from the harrowing process, for which an additional eyelet is fixed on the rod for rearranging the spring. For rotating discs, bearing assemblies with increased dust protection are used. The disadvantages of this technical solution are the use of an equal-arm design of the rocker arm, the use of a tension spring, inaccurate adjustment of the force exerted on the soil, the rather low reliability of this design, which has poorly proven in work on heavy soils, and also the relatively low quality of soil cultivation.

The closest in number of essential features to the proposed utility model is the rotor hoe according to US patent US 3.734.201 dated May 22, 1973, which includes many batteries of pairs of rotary disks located on horizontal axes mounted on opposite ends, from different sides, unequal rocker arm, in upwardly displaced holes relative to articulated joints located closer to the rear ends of the arms of the slats (rocker arm), oriented in the direction of movement. The strips are pivotally fixed in the lower parts of the curved racks and have the ability to rotate. Racks with opposite ends are connected through a shaft or several rotary shafts to the battery from a variety of transversely arranged working bodies with spring elements and mounting brackets to the frame of the tillage implement. The extreme front ends of the uprights extend slightly forward from the shafts and serve as stopping means that are adjacent to the underside of the tiller bar to limit the downward movement of the uprights. The disadvantage of this technical solution is the impossibility of regulating the force exerted on the soil, the unreliability of the springs working on torsion, work only with a certain number of working bodies and, as a result, the inability to process crops with different row spacings.

The objective of the claimed utility model is to increase the reliability of the working bodies of the tillage implement, improve the quality of tillage, and reduce additional operations to control weeds.

The problem is solved in that the rotational hoe section consists of two removable rotary disks made of teeth radially expanding from the hub, with the shape of the working part of the tooth in the form of a curved blade and a stiffener on the back side, with a beveled edge on the inner end of the non-working part of the tooth , with two holes in each tooth for fastening them with bolts on both sides to annular disks having openings for each tooth, as well as for mounting rotary disks to hubs with axes horizontally located on opposite ends on opposite sides of the unequal strip, with an upward shift relative to the hinge located closer to the rear end of the unequal strip, oriented in the direction of movement, entering the lower forked end of the curved rack, pivotally mounted therein and having the ability to rotate, while the rack is opposite the end is connected through a hinge to the bracket mounting to the frame of the tillage implement and the spring element located on this bracket and not rendered during the forward movement, consisting of a clamping screw and a compression spring.

The essence of the proposed technical solution is illustrated by drawings, which schematically show: in FIG. 1 is a general view of a double-disc section of a rotational hoe; FIG. 2 is a side view of a double-disc section of a hoe rotating sideways, in FIG. 3 - rotary disk, in FIG. 4 - a tooth of a rotational disk.

The double-disc section of the rotational hoe (Fig. 1) consists of a rear rotary disc 1 and a front rotary disc 2, made in the form of a plurality of teeth 6, which are radially expanding from the hub and are connected on both sides by means of ring disks 11 by means of bolts 10. Disks mounted on removable horizontal axes with hubs 4 and 5 (Fig. 2), fixed at opposite ends from opposite sides of the unequal strip 7 with upwardly displaced holes 9 relative to the swivel joint 8, located closer to the rear he end of the shoulder strap unequal 7, oriented in the direction of. The unequal flange 7 enters the lower bifurcated end part of the curved stand 3, is rotatably fixed therein with a swivel joint 8, while the curved stand 3 is connected to the opposite end via a swivel joint 12 with a mounting bracket to the frame of the tillage implement 13 and a spring element 14 located on the bracket 13 and moved forward in the direction of travel. The spring element 14 consists of a clamping screw 15 and a compression spring 16, which allows you to adjust the effort of the working body depending on the type of soil.

The rotational disk (Fig. 3) is made in the form of a node in which each tooth 6 is connected by means of a bolt 10 with two annular disks 11 located on both sides of the tooth. The teeth of the rotary disc are located in a coplanar radial relation to the inner ends. At the inner end, each tooth (Fig. 4) has a bevel, so all the teeth with beveled parts are in contact with each other and are located radially around a common center. Each of the teeth has holes for attachment to the hub and is replaced in case of failure.

The working part of the tooth (Fig. 4) has the form of a curved blade with a stiffening rib, which ensures a smooth vertical entry of the tooth into the soil and its exit at an angle causing a sharp ejection of soil, which ensures effective destruction of filamentous weeds, destruction of the soil crust and self-cleaning of the working part of the tooth .

In the process, between the rotary discs 1 and 2 and the soil, a force arises, tending to rotate the unequal bar 7 in the counterclockwise direction. The unequal flange 7 is designed to counteract the tendency to rotate during operation. The swivel joint 8 is arranged so that most of the downward force is applied to the rear rotary disc 1. The ends of the unequal bar 7 deviate upward from the swivel joint 8, while the centers of the axis of rotation of the rotary discs 1, 2 are located above the swivel joint 8. With this design, the horizontal the force component created by the rolling resistance works through a small lever and rotates the unequal bar 7 clockwise. A large proportion of the lowering pressure applied to the rear rotary disk 1 in a static state, together with the location of the rotation axes of the rotary disks 1, 2 above the swivel joint 8, eliminates the possibility of rotation of the unequal strip 7 during operation.

The proposed technical solution allows to improve the quality of soil cultivation, effectively destroys weeds and can be used on various types of soils, due to the ability to fine-tune the effort of the working body - the teeth of the rotary disc due to the implementation of the spring element consisting of a compression screw and compression spring. Each rotary disk during operation has a constant equal downward force due to the use of an unequal flange with offset holes, which increases the reliability of the section as a whole. In addition, the design of the proposed technical solution has increased maintainability due to the possibility of quick replacement of failed teeth.

Claims (1)

Double-disc section of a rotational hoe, consisting of two removable rotary disks made of teeth radially expanding from the hub, with the shape of the working part of the tooth in the form of a curved blade and a stiffening rib on the back side, with a beveled edge on the inner end of the non-working part of the tooth, with two holes in each tooth for fastening them with bolts on both sides to annular disks having openings for each tooth, and also for fastening rotary disks to hubs with axes horizontally located at opposite ends x from different sides of the unequal rack with an upward offset relative to the hinge located closer to the rear end of the unequal rack, oriented in the direction of movement, included in the lower bifurcated end part of the curved rack, pivotally mounted in it and capable of rotation, while the rack connects to the opposite end through a swivel with a bracket to attach to the frame of the tillage implement and a spring element located on this bracket and extended the direction of travel, consisting of a clamping screw and a compression spring.

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