RU211913U1 - Double disc spring section of rotary hoe - Google Patents

Abstract

The utility model relates to agricultural engineering, in particular to a device for surface tillage. The double-disk spring section of a rotary hoe consists of two removable rotary disks made in the form of solid metal disks made of sheet metal or by casting, or disks made of teeth expanding radially from the hub, with the shape of the working part of the tooth in the form of a curved blade and a rib rigidity on the reverse side, with a beveled edge at 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 the annular disks with holes for each tooth, as well as for fastening the rotational disks to the hubs located on opposite ends of one axle located horizontally, or to hubs with axles located horizontally at opposite ends on different sides of the unequal bar, with holes located on the same axis with a swivel joint, or with holes shifted upwards relative to the swivel joint located closer to the rear end of the arm unequal slat, oriented in the direction of movement, included in the bracket installed in the lower end part of the spring rack, pivotally fixed in it and able to rotate, while the spring rack is connected with the opposite upper end by means of a clamp and a bolted connection with a beam, which in turn attached to the frame of the tillage implement.

Description

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

Known working body is a two-disk section of a rotary hoe according to the RF patent for utility model No. 187653 (“Two-disk section of a rotary hoe”) published on March 14, 2019, consisting of two removable rotary disks made of teeth, radially expanding from the hub, with the shape of the working part tooth in the form of a curved blade and a stiffening rib on the reverse side, with a beveled edge at 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 ring discs having holes for each tooth, as well as for fastening rotary discs to the hubs with axes located horizontally at opposite ends on different sides of an unequal bar, oriented in the direction of movement, included in the lower bifurcated end part of the curved rack, pivotally fixed in it and able to rotate, while the rack is connected by the opposite end through a swivel joint with mounting bracket to the tiller frame working tool and a spring element located on this bracket and moved forward in the direction of travel, consisting of a coupling screw and a compression spring.

The disadvantage of this model is the low efficiency of work on heavy compacted soils, due to insufficient force of the adjusting spring.

Known is the working body of a rotary harrow-hoe according to the RF patent for utility model No. 157459 (A01B21/02, A01B21/04, published on 12/10/2015), which is a pair of disks on horizontal axes, while the disks of the pair are connected to the trailer frame and are located one ahead of the other, each under his own furrow. The disks are made cast together with the teeth, which are needle-shaped, and the needle disks are mounted on a spring rack. The disadvantages of this technical solution are: work exclusively in difficult conditions; lack of adjustment of the force of impact on the soil, dependence solely on the force of the rack; poor quality of soil cultivation due to insufficient copying of the relief and poor-quality removal of filamentous weeds; low maintainability.

The working body of a tillage machine is known according to the RF patent for utility model No. 170226 (A01B21/04, A01B61/04, published on 12/30/2016), consisting of a pair of cast needle discs located on different sides of the bracket one in front of the other, each under its own furrow. The discs are inserted into the bearing assemblies and fixed at opposite ends of the bracket oriented in the direction of movement. The bracket, in turn, is connected to the frame with the help of a curved rack. The working body additionally contains a protective spring connected through a rotary axis to the frame of the soil-cultivating machine. On the rotary axis, the discs are raised in case of collision with an unevenness (obstacle) of the cultivated soil relief. The disadvantages of this technical solution are: the use of "heavy" cast disks, and, as a result, a decrease in the quality of tillage; low maintainability of disks; the shape of the ends of the needles; using extension springs.

The working body of a tillage machine is known according to the RF patent for utility model No. 135220 (A01B21/04, published on 12/10/2013), which contains a housing with bearing assemblies, a rack and disks mounted with an offset on one housing, curved teeth are fixed on the disk hubs, according to utility model, the axes of the disks are inserted from different sides of the body with an offset relative to the hinge, and the curved teeth of the disks are evenly placed around the circumference on the hubs of the square-shaped disks, while the body is pivotally connected to the rack, made in the form of a flat tape spring. The fastening of 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 by 180°. The disadvantages of this technical solution is the use of a flat band spring to connect the housing to the rack, this type of connection is unreliable, especially in the absence of crop farming. The disadvantages include the lack of adjustment of the force of impact on the soil.

A rotary needle harrow is known according to the RF patent for utility model No. 171976 (A01B21/04, published on 06/23/2017). The rotary needle harrow contains a battery of pairs of discs connected by means of curved spring-loaded rods to a trailed frame made of a square section profile. Wedge-shaped bent teeth with an oblique cut with an oval surface are fixed on each disk. The discs are installed in pairs at the ends of the articulated rocker, 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-armed, and also with the possibility of turning by 180° to transfer the teeth from the "active" state to the "passive" state. The 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 eye is fixed on the rod for rearranging the spring. For rotating discs, bearing units with increased dust protection are used. The disadvantages of this technical solution are the use of an equal-arm design of the rocker arms, the use of a tension spring, inaccurate adjustment of the force of impact on the soil, the rather low reliability of this design, which has not proven itself well in heavy soils, and also the relatively low quality of tillage.

The objective of the claimed utility model is to increase the reliability of the working bodies of the tillage tool, improve the quality of soil cultivation, reduce additional operations to combat weeds.

The problem is solved by the fact that the spring section of the rotary hoe consists of two removable rotary disks, made in the form of solid metal disks made of sheet metal or by casting, or 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 blades and a stiffener on the reverse side, with a beveled edge at 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 the annular disks with holes for each tooth, as well as for fastening the rotational disks to the hubs located at opposite ends of one horizontal axis, or to hubs with axles located horizontally at opposite ends on different sides of an unequal bar, oriented in the direction of movement, included in the bracket installed in the lower end part of the spring rack, pivotally fixed in it and having the ability to the gate, while the spring post with the opposite upper end is connected by means of a clamp and a bolted connection with a beam, which, in turn, is attached to the frame of the tillage tool.

The essence of the proposed technical solution is illustrated by drawings, which schematically show: in Fig. 1, fig. 2, fig. 3 is a general view of a two-disk spring section of a rotary hoe, in Fig. 4, fig. 5 - view of the double-disk spring section of the rotary hoe from the front, in Fig. 6, fig. 7, fig. 8 - rotary disk, Fig.9 - tooth of the rotary disk.

The double-disk spring section of the rotary hoe (Fig.1, Fig.2, Fig. 3) consists of a rotary disk 1 and 2 made in the form of solid metal disks made of sheet metal or by casting (Fig.8), or disks made in the form of a set teeth 6, which expand radially from the hub and are connected on both sides with the help of annular disks 11 by means of bolts 10 (Fig. 6, Fig. 7). The disks are mounted on hubs 4 and 5 located at opposite ends of one horizontal axis 16 (Fig. 5), or on removable horizontal axles with hubs 4 and 5 (Fig. 4) fixed at opposite ends from different sides of an unequal-shelf bar 7 with holes 9 located on the same axis with the swivel 8 (figure 2), or with holes 9 displaced upward relative to the swivel 8, located closer to the rear end of the shoulder unequal strap 7, oriented in the direction of motion. Not equal-shelf bar 7 is included in the bracket 15, installed in the lower end part of the spring rack 3, fixed in it by means of a swivel 8 with the possibility of rotation, while the spring rack 3 is connected with the opposite upper end by means of a clamp 12 and a bolted connection with the bar 14, which in turn attached to the frame of the tillage tool 13.

Rotary disk (Fig. 6, Fig. 7) 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 disk are located in a coplanar radial relation to the inner ends. At the inner end, each tooth (Fig. 9) has a bevel so that all the beveled teeth are in contact with each other and are located radially around a common center. Each of the teeth has holes for fastening to the hub and is replaced in case of failure.

The working part of the tooth (Fig. 9) 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 that causes a sharp ejection of the soil, which ensures the effective destruction of threadlike weeds, the destruction of the soil crust and self-cleaning of the working part of the tooth .

In the process of operation of the double-disk spring section, in the version with holes 9 displaced upwards relative to the swivel joint 8, a force arises between the rotational disks 1 and 2 and the soil, tending to rotate the unequal-shelf bar 7 in a counterclockwise direction. The unequal bar 7 is designed in such a way as to counteract the tendency to rotate during operation. The swivel 8 is located so that most of the downward force is applied to the rear rotational disk 1. The ends of the unequal bar 7 deviate upward from the swivel 8, while the centers of the axes of rotation of the rotational disks 1, 2 are located above the swivel 8. With this design, the horizontal the component of the force created by the rolling resistance works through a small lever and rotates the unequal bar 7 clockwise. A large proportion of the downward 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, excludes the possibility of rotation of the unequal-shelf bar 7 during operation.

The proposed technical solution improves the quality of tillage, effectively destroys weeds and can be used on heavy compacted soils, thanks to the use of a high-strength spring element in the form of a solid spring rack. Each rotary disk during operation has a constant equal downward force. In addition, the design of the proposed technical solution has increased maintainability due to the ability to quickly replace failed teeth, disks or spring racks.

Claims (1)

Double-disk spring section of a rotary hoe, consisting of two removable rotary discs made of teeth expanding radially 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 reverse side, with a beveled edge at 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 holes for each tooth, as well as for fastening rotational disks to hubs with axes located horizontally at opposite ends from different sides of an unequal bar with holes located on the same axis with swivel, oriented in the direction of motion, included in the bracket installed in the lower end part of the spring rack, hinged in it and able to rotate, while the spring rack is connected by the opposite upper end by means of a clamp and a bolted connection with a beam, which in turn attached to ra me soil-cultivating implements.

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