Tool for surface tillage
SUBSTANCE: tool for surface tillage comprises discs curved along the helix line. The discs are located so that the cutting edges of the adjacent discs are located in the same vertical plane in the direction of movement. The discs are mounted on the hubs mounted on the hexagonal shaft. The hexagonal shaft has support bearings with anti-friction liners. The tool is made sectional. To provide the soil contour following the section coverage should be 120-150 cm. The sections are mounted in two.
EFFECT: soil loosening is provided without removal of lower moist layers.
The invention relates to agricultural machinery, in particular to the disk tools designed for loosening the soil and destroying weeds in preparing the soil for planting.
Know tillage tool that contains a frame, which is attached modules working bodies, each through a separate articulated rods made as mounted for rotation and arranged each at an acute angle to the longitudinal centerline of the gun axes fixed in them ripping or packer work items, each of the rods are connected by springs and brackets placed in her bearing unit with the frame of the gun and the axis of the bearing work items in the work items are made in the form of shells, paired inside with polyhedra by rays adjacent to the edges or the corners of the polyhedra, when this beams with their ends connected to the shells, and in the center of the polyhedra with holes for the connection of work items with the axis, and the working elements in the form of shells, within which are intersecting beams with their ends connected to the shells, when the rays are fixed so that relative to the imaginary center of the shells they form holes in the form of polyhedra corresponding to the dimensions of the axes of the mounting is of work items, while working elements in the form of shells, paired inside with polyhedra by means of curved beams that their ends are connected with the shells, and beams at the intersection are fastened to each other and shells, for example, welding (RU patent No. S, IPC7AV 7/00. AV 35/20).
The disadvantages of this tillage tools include design complexity, low reliability, lack of weed control.
Known disk tillage tool that contains a frame, mounted on her shaft, consistently located on the shaft drives, while it is provided with a flexible floating purifier (black Guillemot), placed in the inter space, and flexible floating purifier made in the form of individual units, movably interconnected, forming a chain, the ends of which are fixed diagonally to the beams of the frame so that its branches were down along the walls of the disks, forming a loop, envelope shaft drive, with disk cleaner is made in the form of a flexible cable (RU patent No. S, IPC7AV 7/00, AV 35/12, AV 35/20).
The disadvantages of this soil are low quality loosening, incomplete eradication of weeds.
Known disc harrow, containing a frame, a battery with a rotational RA is okimi bodies, made in the form of flat disks rigidly mounted on a rotating shaft at an angle to their axis, while working at the bodies on the shafts in the form of flat disks rigidly mounted on the shafts at an angle of 90° to the shaft axis (RU useful model №89920U1, IPC AV 83/00).
The disadvantages of this disc harrows are low quality loosening and partial destruction of weeds and seedlings.
While in the drawing flat discs mounted on shafts not at a 90° angle to the shaft axis.
This disc harrow is accepted by us as the nearest equivalent.
The essence of the claimed invention is as follows.
The problem to which the invention is directed, - improving the quality of tilling, weeding and seedlings, simplifying the design.
The technical result - loosening the soil without removal of the lower soil moisture, moisture retention, increased productivity.
This technical result is achieved in that the tool for surface soil, containing a frame with a rotary working bodies, made in the form of disks rigidly mounted on the rotating shaft, according to the invention is made sectional, and the disks are curved along a helical line with placing the disks on the shaft so that the cutting edges of adjacent disks were placed in the same vertical plosko and in the direction of travel and mounted on the hub, mounted on a hexagonal shaft, which has bearings with antifriction bearings, mounted on the frame guns, the width of the section to ensure a copy of the contours of the ground is set to 120... 150 cm, and to mount the partitions using leashes and towing device fixed to the coupling in two rows.
Given the applicant's analysis of the prior art, including searching by the patent and scientific and technical sources, and identify sources that contain information about the equivalents of the claimed invention, has allowed to establish that the applicant is not detected similar, characterized by all the features of the claimed invention.
Therefore, the claimed invention meets the requirement of "Novelty" under the current law.
The invention is illustrated by drawings.
Figure 1 presents a tool for surface soil, the cross-section of the section of the working bodies.
Figure 2 - the same, top view.
Figure 3 - Assembly of three sections guns for surface tillage.
Tool for surface soil consists of a frame 1 of the sections, where section 2 of the bearings. The bearings installed hexagonal shaft 3, on which is fixed the hub 4 with the working bodies 5. Working bodies 5 are made in the form of discs, cutting edge of which the implementation of the Jena along a helical line. When cutting parts of adjacent disks are placed in the same vertical plane. In buildings 2 set bearing pads 6 of antifriction material that acts as a sliding bearing. To mount the partitions on the frame 1 with holes 7. To ensure a copy of the relief surface of the processed field width of the section shall be equal to 120... 150 see
Download tractor mounted tool is made by placing on the coupler 8 with trailers device 9 required number of sections, placed in two rows. This section first row attached to the towed device 9 with short floods 10, and sections of the second row are secured to the coupler 8 with trailers device 11 long leashes 12.
Tool for surface tillage works as follows.
Before working on the coupler 8 is installed, the required number of sections, which provides a maximum load capacity of the tractor. When moving the machine across the field drives 5 tools for surface tillage cut its cutting edge surface of the soil to a predetermined depth, which can be adjusted by the installation of the goods on the frame 1 of the sections.
Cut the layer of soil moved a lateral edge of the working bodies 5, which provides loosening the soil without blasting the TA and the conservation of soil moisture. When shifting soil torn the roots of the weeds and they perish.
Loosening the soil without removal of the lower moist layer on the surface protects the soil from drying out and improves crop yields.
Tool for surface soil, containing a frame with a rotary working bodies, made in the form of disks rigidly mounted on the rotating shaft, characterized in that the instrument is made sectional, and the disks are curved along a helical line with placing the disks on the shaft so that the cutting edges of adjacent disks were placed in the same vertical plane in the direction of travel and mounted on a hub mounted on a hexagonal shaft, which has bearings with antifriction bearings, mounted on the frame guns, the width of the section to ensure a copy of the relief of the soil is equal to 120...150 cm, and for mounting partitions using leashes and towing device fixed to the coupling in two rows.
SUBSTANCE: invention relates to agriculture, in particular, to gravitational farming and may be used for speed treatment of soil. An outfit comprises rotary working propulsive agents and a platform with a power converter. The platform is arranged as self-propelled with front and rear swinging supports. The platform is installed in front of rotary working propulsive agents or behind them or between them. The platform may be equipped with a device to raise supports closer to working propulsive agents.
EFFECT: structural design will make it possible to ensure outfit operation in loose soil due to the possibility to adjust value of adhesion depending on soil hardness and also to ensure solid surface and piercing deep treatment of soil at high speeds.
4 cl, 3 dwg
SUBSTANCE: invention relates to agricultural machinery. The tool contains a frame and a battery with spherical disks with an active drive of working bodies. The battery with spherical cutout disks is mounted on the tool frame under such attack angle α=18°, for the rear cutting corners ξ of the discs have a negative value ξ =-12° to ensure mutual balancing of the transverse components of forces of P and P1 operating on the disc battery in the process of work.
EFFECT: such constructive implementation enables to provide the treatment of green-manured fallow of any height and fallow lands with the simultaneous incorporation of herbage into the topsoil, which contributes to restoration of soil fertility, and to reduce motive force, increase reliability, and to provide linear motion of electric-power means of a lighter class 1,4 and 2,0.
SUBSTANCE: disk body includes spherical disk. Disk is fixed on axis arranged in bearings in body with cover. Disk body is provided with shock absorber in the form of hub installed in body with damping rings of oval section. Body and hub are arranged so that rings rest on them with their lateral side.
EFFECT: design of disk body has improved operational reliability.
SUBSTANCE: machine comprises bearing system with trailing device, support wheels, control mechanism and four-row disk device. Disk device has stands installed into individual holders of bearing system, with tilling-grinding working elements in the form of disks. Convexity of disks in odd and even rows is directed towards opposite sides. Working elements of two front rows are arranged with uneven cutting edge, and in two subsequent rows - with even cutting edge. Disks of the third and fourth rows are displaced relative disks of the first and second rows for processing of the first and second rows that have not been processed with disks and combs for provision of solid treatment of land soil. Disks with uneven and even cutting edges are installed on horizontal axles with stands with the possibility to control angle of their arrangement to cutting plane and to motion line.
EFFECT: such design makes it possible to improve quality of soil cultivation with simultaneous grinding of long-stalked stubble remains.
2 cl, 7 dwg
SUBSTANCE: method includes treatment of soil with spherical disks installed at attack angle, peripheral part of surface of which is arranged as wavy for provision of smoothly repeating variations of angle of attack of disks to the left and to the right from initial value of angle of attack of disks. Device comprises spherical disks arranged at the angle of attack and having cutting edge. Peripheral part of each spherical disk surface is arranged as wavy. Wave of disk, starting from cutting edge, is made as decreasing to disk centre with transition into sphere.
EFFECT: such technology and structural design make it possible to improve quality of cultivation with reduction of process energy intensity and improve efficiency of tiller disks operation.
2 cl, 3 dwg
SUBSTANCE: harrow includes frame with transverse beams and hydraulic cylinder mounted on it to perform work tool lifting and lowering, support and transport wheels. Spherical disc batteries are mounted on frame and fixated to front and rear sections by backboards, and feature incidence angle adjustment device for discs. Transverse beam features balance device and control rod. Support and transport wheels are mounted on rotation axle made in the form of lever aggregate with common axis. Lever aggregate axis is connected to hydraulic cylinder at one lever side and to support and transport wheels at the other side. Front and rear battery sections are positioned in V-shaped pattern. Battery sections consist of central bar, wing bar, disc incidence angle adjustment device. Rollers are mounted on the frame behind disc batteries, rollers are made in the form of grinding rollers of welded needle structure and mounted in bracket bearings. Grinding roller can be gradually adjusted in height and features spring effort compensator preventing mechanical hardening of soil. Bracket is connected by backboards to beams. One beam is connected to central bar beam of rear section. Disc incidence angle adjustment device includes rotating nut which can freely rotate in flange junction to compensate angle between frame beams and central bar beam of front section, screw, and spherical elements.
EFFECT: enhanced reliability of harrow operation, extended functional capacity.
SUBSTANCE: additional fixture is represented by a plate attached to the outer disk concave side with the help of a vertical support so that to provide for regulation and lock of the plate position height. Inclined to the horizontal plane, the plate forms with the latter acute angles both lengthwise and crosswise. The plate is arranged in such a way that its edge proximal to the disk is higher than the outlying one and the front edge is higher than the rear one. The plate is attached to the lower section of the hub strut. The hub is clearance-fitted onto the trunnion with the help of a radius rod screwed into the hub bracket so that to enable its displacement angle lock. The trunnion axis is parallel to that of the disk rotation. The plate is spring-mounted and equipped with an adjustable element limiting the angle of displacement relative to the trunnion axis.
EFFECT: improvement of tillage quality and energy efficiency.
SUBSTANCE: device contains disk and shellboard. The shellboard is mounted from concave side of disk by means of rack with possibility of change of its height of mounting and inclination to working surface of a disk. The shellboard is supplied by roller with possibility of touchdown with working surface of disk in the bottom part of the back surface. The roller is connected to the rack by means of the cylindrical hinge and a resilient member. Rotation axis of a roller is excentric.
EFFECT: possibility of evasion of falling of soil and plant residues between the disk and the shellboard and improvement quality of tillage.
2 cl, 3 dwg
SUBSTANCE: disker has a frame with several rows of cross bars mounted on it. Vertical posts with axes at the ends are mounted on the bars. Spherical discs are mounted on the axes with provision for rotation about the axes. The discs have incident angle and tilt angle to the vertical and are arranged head-on across the working width. The discs on the bars are mounted in opposite sides and form rows. Each disc of the next row is displaced in the transversely relative the disc on the preceding row. Behind the front rows of bars with spherical discs, bars with corrugated discs are mounted on the frame. The bars are mounted deep in the spherical discs with displacement in the transverse plane for passage through the furrow bottom, formed after passage of the spherical discs.
EFFECT: higher quality of secondary tillage.
SUBSTANCE: combined tillage equipment consists of the frame, tractor hookup, operating elements mounted on the frame in two rows, packing and leveling devices and concave disks on the horizontal axis behind the operating elements. The operating elements of the second row are shifted horizontally against the operating elements of the first row. Each operating element is made in the form of free running tine with the concave disk with its camber facing upwards. The concave disk of the operating element is fixed transversely to the tine; its all round cutting edge is located in horizontal plane. The concave disks are mounted on the horizontal axis pairwise at an angle to each other; besides, the disks in each pair are mounted with their cambers towards centre of symmetry. The centre of symmetry of each pair of disks is located in the same lengthwise-vertical plane with the corresponding tide of the first row operating elements. The packing and leveling device is made in the form of the assembly consisting of packing wheels located one by one. The tides of the operating elements are mounted on the frame via safety guard. The operating elements of the second row are mounted with overlapping of the operating elements of the first row. Each pair of the height adjustable concave disks on the horizontal plane is mounted on the frame. The frontal packing wheel of the assembly is cannulate and the backward one is slatted, moreover it is possible to turn the backward packing wheel through a full 180 degrees. The equipment will allow increasing tillage quality and grain yield.
EFFECT: increase of the tillage quality and grain yield.
6 cl, 3 dwg
SUBSTANCE: device comprises two rotary milling chisel ploughs located vertically symmetrically along the direction of travel of the device, mechanically connected to a common driver. The rotary milling chisel plough is provided with an annular milling chisel plough. The annular milling chisel plough is provided with outer cutting elements, provided along its outer side at the side surfaces alternately on the left and on the right. In front of the cutting element a container for receiving soil is made. The container for receiving soil is simultaneously a cavity of engagement of the gear drive on the outer side of the annular milling chisel plough. The container for receiving soil of the annular milling chisel plough is provided with a recess on its rear surface formed parallel to the plane of the annular milling chisel plough between the bottom of the container for receiving soil and the cutting element of the annular milling chisel plough. The rear surface in the direction of rotation of the pinion tooth is provided with a projection which width is 20-30% of the width of the pinion tooth, which lateral plane is made in one plane with the lateral surface of the tooth, directed towards the central plane of the pinion.
EFFECT: this constructive implementation enables to improve cleaning the container for receiving soil of the annular milling chisel plough and the cutting element of the annular milling chisel plough from the extracted soil, to reduce the tractive resistance and energy consumption, to improve reliability of the device.
2 cl, 2 dwg
SUBSTANCE: invention relates to the agricultural machinery industry, in particular, to devices for subsoil milling. The device comprises two rotary milling chisel ploughs (2). The rotary milling chisel plough (2) is provided with a disc (4) of the milling chisel plough and an annular milling chisel plough (5). Over the milling chisel plough (2) the drive gear (15) of the drive is mounted. The gear (15) is located above the soil surface and is provided with teeth (14) of engagement. The teeth (14) alternately on the left and right interact with containers (12) for receiving ground of the annular milling chisel plough (5). On the container (12) surface rear in the direction of rotation of the annular milling chisel plough (5) the stop (13) is made. The surface of the tooth (14), which is rear in the direction of rotation of the drive gear (15) rests on the stop (13).
EFFECT: constructive implementation enables to reduce the draught resistance and energy consumption, to improve the reliability of the device.
SUBSTANCE: invention relates to the field of agricultural machine building, in particular, to rotary operating tools of soil tillage devices. The operating tool comprises a shaft with rigidly fixed blades. Blades have rectilinear and elliptical cutting edges. The rear edge of each blade is made in the form of the elliptical curve and stretches via the spike of the blade and the rear end of its rectilinear edge. The direction of bulges in the elliptical and rear cutting edges is same, and their length is equal. Blades are fixed in pairs on opposite faces of the shaft with displacement by 90°. The spike of one blade and the rectilinear cutting edge of the other pair of blades are in the same plane perpendicular to the axial line of the shaft.
EFFECT: structural solution makes it possible to evenly till soil and provides for stable operation of a soil tillage device at slopes.
SUBSTANCE: invention relates to the agricultural machinery industry, in particular to milling tillage tools, and can be used for rotary tillage. The working body of soil-cultivating cutter comprises knives and a main shaft with two carriers rigidly attached to it, between which in their holes three milling drums are movably mounted with knives rigidly mounted on them. At the ends of the milling drums on one of the carriers the satellites are rigidly mounted connected by the gear drive with the sun gear located on the main shaft and rigidly mounted to the gear case.
EFFECT: invention enables to mill the soil with lower power.
SUBSTANCE: invention refers to agriculture, in particular, to land reclamation. The method includes deep tillage of soil with soil cultivating tools with passive actuators, rotor-milling treatment of internal soil layers, which is carried out 2-5 years after deep tillage of soil with soil cultivating tools with passive actuators. Soil treatment is carried out in cycles, cycle components include deep tillage of soil with a soil-cultivating tool with passive actuators for depth of 45-50 cm with a pitch of vertical plane circumscribed by the treatment tool in the space of soil continuum, multiple to minimum distance between lines of plants of future agrophytocenosis, for instance, 45 cm, 70 cm, 110 cm. After deep tillage of soil with a soil-cultivating tool with passive actuators in 2-5 years rotor-milling treatment is carried out for internal soil layers in the discrete zone of soil continuum in the layer of 25-50 cm. The width of the treated space of the soil continuum, for instance, 15 cm, 23 cm, 34 cm, is selected so that it makes not more than 1/3 of the distance between lines of deep tillage. The discrete zone of rotor-milling treatment of internal soil layers is placed in the soil continuum symmetrically so that the vertical axis of its symmetry matches the axial plane of symmetry of the vertical discrete zone of the soil continuum, previously arranged in the space of the soil continuum with a treatment tool of the soil-cultivating tool with passive actuators. In 20-30 years the cycle is repeated by means of the specified sequence of soil treatments. Treatment is carried out with displacement in the vertical plane circumscribed with the treatment tool of the soil-cultivating tool with passive actuators in the space of soil continuum by 1/3 of the distance between tillage lines selected when performing the first cycle of soil treatment. Cycles of soil treatment by the soil continuum are closed in 60-90 years and are continued in the same manner.
EFFECT: method makes it possible to stabilise soil profile and a biogeosystem as a whole, to improve quality of soil tillage, to provide for long-term soil reclamation effect and to optimise conditions for development of plant rhizosphere.
SUBSTANCE: device comprises a frame and two rotary slot-cutters. The rotary slot-cutters are mounted on the frame, are located vertically symmetrically along the direction of the device and are mechanically linked to a common drive. Under the drive a subsoil milling device is located. The slot-cutters and the milling device have shafts placed horizontally and perpendicular to the direction of motion of the ripper. The device has a gear pinion of drive of the annular slot-cutter located on the frame above the rotary slot-cutter and provided with outer engagement teeth performed alternately on the left and the right in the direction of rotation of the gear pinion. The rotary slot-cutter is provided with the slot-cutter disc and the annular slot-cutter. On the outer surface of the annular slot-cutter complementary to the outer engagement teeth of the gear pinion the engagement recesses are made. Along the inner surface of the annular slot-cutter alternately on the left and right engagement recesses are made. The slot-cutter disc comprises an idler, support and center drive gears, which engagement teeth are made alternately on the left and right along the outer cylindrical surface of each gear complementary to the engagement recesses on the inner surface of the annular slot-cutter. On the idler, support and center gears and the inside annular slot-cutter a cylindrical bearing surface is made, which diameter of the circle is equal to the diameter of the corresponding circle of the engagement. The annular slot-cutter is provided with cutting elements mounted along its outer cylindrical surface alternately on the left and right in the direction of rotation of the annular slot-cutter. In front of the cutting element on the side surface of the annular slot-cutter a container for ground intake is made which is open towards the side and the outer cylindrical surfaces of the annular slot-cutter. The milling device shaft is made with consoles. The engagement recesses of the gear transmission are made on the side surface of the annular slot-cutter and oriented to the outer side of the annular slot-cutter. The lateral plane of the engagement recesses is made on the same side of the annular slot-cutter as the container for ground intake of the annular slot-cutter relative to the appropriate side surface of the annular slot-cutter to a great 15-20% depth than the lateral plane of the container for ground intake of the annular slot-cutter.
EFFECT: constructive implementation enables to reduce tractive resistance and energy consumption, to increase the reliability of the device.
3 cl, 2 dwg
SUBSTANCE: device comprises two rotary slot cutters located vertically symmetrically along the direction of the device movement, and connected mechanically to a common drive. The device comprises a rotary intrasoil cutter located below the drive. The cutter shafts are located horizontally and perpendicular to the direction of motion of the ripper. The rotary slot cutter is provided with an annular slot cutter. The device has a pinion, idler, support and center gear wheels, the teeth which engagement is made alternately left and right along the cylindrical surface of the engagement on every detail of the engagement on which they mutually rest with the toothed wheel gearing. The annular slot cutter is provided with cutting elements made on his side surfaces alternately on the left and right, forming capacity for receiving soil. The device is equipped with intrasoil rotary cutter which shafts are located horizontally and perpendicular to the direction of the ripper movement. The rotary slot cutter is equipped with the sun pinion mounted on a separate shaft, located on the frame of the device in the bearings horizontally and perpendicular to the direction of the ripper movement. The annular slot cutter is made in the form of an outer planetary gear. The pinion, idler, support and center gear wheels are made planetary to the sun pinion and the annular slot cutter. The shaft of intrasoil rotary cutter of the lower soil layer is mounted to the idler planetary gears of the rotary slot cutter. The shafts of intrasoil rotary cutter of the topsoil are mounted in the support planetary gears of the rotary slot cutter.
EFFECT: constructive implementation enables to improve the quality of soil treatment by layer by layer loosening the soil.
SUBSTANCE: device comprises a shaft of a horizontal internal soil milling appliance with cutters, and the shaft is made with cantilevers. The shaft is arranged perpendicularly to the direction of tiller movement and is mechanically connected to two rotary slot cutters. Slot cutters are arranged vertically symmetrically along the direction of the device movement, cutters have actuators. An odd actuator of a cutter is arranged at the angle of 90° to the cutter plane. A cutting edge of the odd actuator is aligned in parallel to the cutter axis. The odd actuator is arranged at the angle of 60-65° to the cutter plane and is aligned in a direction opposite to the odd actuator. The cutting edge of the even actuator is arranged in the plane parallel to the cutter axis of rotation.
EFFECT: structural design will make it possible to provide for decompaction of inner soil levels and their mixing with each other both in direction of device movement and in transverse direction with high quality, reliability and low energy inputs.
4 cl, 5 dwg
SUBSTANCE: device comprises a rotary slot cutter with a slot cutter disc, a circular slot cutter with an intermediate gear of inner engagement, a master, an alignment and a slave gears of the subsurface tiller drive. The device is equipped with an intermediate gear of a drive, which is installed on the slot cutter disc with engagement and the inner intermediate gear of the circular slot cutter drive and the slave gear of the drive of the subsurface tiller. The circular slot cutter is equipped with external cutting elements and reservoirs to get soil arranged between them. Cogs and dents of engagement of the master, intermediate of inner engagement, intermediate and slave gear of the subsurface tiller drive are arranged in pairs as complementary in turns at the left and right along engagement of each gear. The master, intermediate of inner engagement, intermediate, alignment and slave gears of the tiller's drive are equipped with cylindrical support surfaces. Support surfaces of gears are arranged in the form of sections of the cylindrical surface, along which elements of the circular slot cutter drive are mutually run in. The generatrix of the cylindrical surface is a pitch circle of each gear. Support surfaces are arranged as complementary in turns at the left and right oppositely to the appropriate cog and dent of the gear engagement.
EFFECT: increased efficiency of soil treatment.
SUBSTANCE: device has two rotary gap-cutters arranged vertically symmetrically along the direction of movement of the device and mechanically connected with a common drive. The device has intra-soil rotary miller located below the drive. The miller has shafts placed horizontally and perpendicular to the direction of the ripper. The rotary gap-cutter is equipped with a ring gap-cutter, a driving gear, idle gear and centering gear of the drive, which catching teeth are made alternately on the left and on the right along the catching. On the driving gear, idle gear and centering gear and the ring gap-cutter there is a cylindrical bearing surface, diameter of which circle is equal to the diameter of the corresponding circle of the catching. The ring gap-cutter is equipped with cutting tools located on its side surfaces alternately on the left and on the right. The rotary gap-cutter is equipped with a sun gear mounted on a separate shaft, located on the frame of the device in the bearings horizontally and perpendicularly to the direction of the ripper. The ring gap-cutter is designed as outer planetary gears. The driving gear, idle gear and centering gear are made planetary to the sun gear and the ring gap-cutter.
EFFECT: constructive implementation will improve the reliability of the device operation.
2 cl, 3 dwg
FIELD: agricultural engineering; rotary tillers.
SUBSTANCE: proposed rotary tiller tine consists of two parts-base and point hinge connected to each other. Base is provided with slot to accommodate point. Point is fixed in working position by limiter which is provided with vertical slot for interacting with boss of point made conical as inner surface of limiter slot. Point is additionally fixed in working position by flat-spiral spring secured by one end in slot of base and by other end thrusting against end face of point for displacement. Base of tine is rigidly secured on disk.
EFFECT: simplified design, improved reliability of working process.