Ripper point for breaking hard and frozen soils

FIELD: mining industry.

SUBSTANCE: invention can be used in working members of mining and earth-moving machines, particularly, in machines for digging hard and frozen soils. Proposed ripper point for breaking hard and frozen soils has shank with slot for fastening, and wedge-like working part formed by front end surface, two side surfaces and rear surface. Working part of front end surface located in place of intensive wear is reinforced along longitudinal axial line H-H by three of stress concentrators, being round elements projecting over front end working surface and dipped into body of point. Distance L between concentrators in row and distance 1 between rows is equal to triple value of their diameter.

EFFECT: reduced effort to applied to small soil, reduced power consumption for ripping, increased service life of ripper point.

3 dwg

 

The invention relates to the construction, in particular to machines for developing a strong and frozen ground.

Known tooth Ripper (A.S. 1585472, IPC 5 02F 5/32, 9/28, publ. 15.08.1990, bull. No. 30), which includes the cutting edge, the front face with a blind longitudinal groove, side and rear faces. In the longitudinal groove is installed with the possibility of moving the base of the pointed protrusion. A longitudinal groove extends on the surface of the rear face to which is attached by means of screws. Between the rear face of the base of the protrusion and the cap placed elastic element, and between the bottom of the longitudinal groove and the front face of the base of the ledge has a damping element.

The disadvantage of this tooth Ripper is the importance of the effort required for the cleavage of the soil, the high energy intensity of the process of loosening the soil, low service life.

Famous crown Ripper dozer (U.S. Pat. 2088730, IPC 7 02F 9/28, publ. 08.27.1997), comprising a wedge-shaped shank with a groove for fastening and a wedge-shaped working part, which is formed by the front wavy surface, two side surfaces and rear wavy surface located therein along the longitudinal axis of the crown shaped groove. Rear wavy surface of the working part is made convexo-concave, and convex-concave, lying in longitudinal section to once on the back surface of the crown, formed by a pair of arcs of at least two circles of different radius.

The disadvantage of this crown is the importance of the effort required for the cleavage of the soil, the high energy intensity of the process of loosening the soil, low service life.

Closest to the proposed tip Ripper for destruction of solid and frozen soils is the working body of the Ripper (A.S. 1668578, IPC 5 02F 5/32, 9/28, publ. 1991, bull. No. 29), including a base with a recess on its inner face. In the last guide rollers mounted endless belt. To it one of its edges attached in the form of parts of the cylinder hub. Excavation of the Foundation of the closed protective elastic element.

The disadvantage of this working body of the Ripper is a great value for the effort required for the cleavage of the soil, the high energy intensity of the process of loosening the soil, low service life.

The task, which directed the claimed technical solution is the creation of the tip of the Ripper that reduce the effort required for the cleavage of the soil, reducing the energy intensity of the process of loosening the soil, increasing service life.

When carrying out the invention the problem is solved at the expense of achieving a technical result, which is to reduce the need for Scola ground the energy intensity of the process of loosening the soil and increase the service life of the tip of the Ripper for destruction of solid and frozen ground.

This technical result is achieved by the fact that the design of the working body of the tip of the Ripper solid and frozen ground allows the workflow loosening integral, hard and frozen ground to carry out combined method, by formation of cracks and subsequent partial crushing, crushing and partial formation of the dispersed mass, which surrounds all surfaces due to the fact that the working part of the frontal surface, located in the place where the most intensive wear, reinforced along the longitudinal centerline H-H (1) three rows of stress concentrators. The stress concentrators are the elements of round shape, protruding above the frontal surface and embedded in the body of the tip, the distance between hubs in row L and the distance between the rows of l is equal to threefold increased the size of their diameter, and the intensity of the process of crack formation increases sharply at the entrance of the peaks of the stress concentrators in heavy contact with razrehseniem soil.

Increased productivity, reduced energy consumption and longer service life are achieved by replacing the process of loosening a solid working surface process point of loosening system stress concentrators combined method that includes sledovatelnot operations: the formation of cracks in partial crushing, the collapse and partial formation of the dispersed mass.

The invention is illustrated by drawings, where figure 1 presents the tip of the Ripper, a top view; figure 2 presents the tip of the Ripper, a side view along arrow a; figure 3 shows a diagram of the formation of cracks in the contact stress with the ground, on which the O-E and O-F - the rays from a point of contact About; O'-F'-G - rays from a point O', etc.

The tip of the Ripper for destruction of solid and frozen soils contains a shank 1 with a wedge-shaped groove 2, for attachment to a cultivator, splitomicin hole 3, the belt rigidity 4 and a wedge-shaped working portion 5 formed in the front frontal surface 6, the side surfaces and the rear surface 7, and sock 8 with the cutting edge of the anterior frontal surface 6. All surfaces are angled to each other. With the front frontal surface 6, as the most loaded working surface exposed in addition to power loads intensive abrasive wear, reinforced along the longitudinal centerline H-H three rows 9-10-11 stress concentrators 12, representing the elements of a round shape, protruding above the frontal surface and embedded in the body of the handpiece, the arrangement between stress concentrators 12 in row L and the distance between the poisons l is threefold increased the size of their diameter.

The tip of the Ripper for destruction of solid and frozen soils is as follows.

When moving the tip of the Ripper 1 horizontally (arrow V, Fig 3)mounted on the cultivator with a wedge-shaped groove 2, is placed in the shank 1, reinforced belt rigidity 4, and sportowego holes 3 peaks of stress concentrators 12 will be cyclically to get in contact with solid surfaces at the points of intersection of the contour lines along with verticals and to enter into force interaction, accompanied by cleavage of the array of the soil with subsequent partial crushing, crushing and partial formation of the dispersed mass. The stress concentrators 12 of the protruding size above the front frontal surface 6 (the plane of AVSD) (see figure 1), udaliaias into the ground, creating a stress concentration in the soil simultaneously with emerging efforts directed fan-shaped from the horizontal TH, O F, O G and so on (see figure 3) (the direction of movement V of the tip of the Ripper) to perpendicular to it the vertical direction O F, O G, O"H, etc. contributing to the destruction of the soil, which is first compacted layer at the contact points, and then chop off his lines of action of forces with subsequent partial crushing, crushing and partial formation of the dispersed mass, which then wraps around everything working surface 6, 7 and the lateral surface of the wedge-shaped working portion 5 of the tip of the Ripper.

Thus, deformation of the chip, due to the stress and forces directed vertically away from the touch points of stress concentrators with the ground, producing a fan-shaped split ground plane slip TH, O F, O G and so on (see figure 3) to the vertical direction thereto, the direction OF, O G, O"H, etc., reduces the effort required for the cleavage of the elements of the soil, reduces energy consumption of the process of loosening the soil and increases the service life of the tip of the Ripper for destruction of solid and frozen ground.

Use the tip of the Ripper for destruction of solid and frozen ground allows you to: reduce the force required for the cleavage of the elements of the soil; to reduce the energy intensity of the process of loosening the soil; increase the service life of the tip of the Ripper for destruction of solid and frozen ground.

The tip of the Ripper for destruction of solid and frozen soils, comprising a shaft with a groove for fastening and a wedge-shaped working part, which is formed by the anterior frontal surface, two side surfaces and the rear surface, wherein the working part of the frontal surface, located in the place where the most intensive wear, reinforced along the longitudinal centerline H-H three rows of conc the Directors of stress, items round shape, protruding above the frontal surface and embedded in the body of the tip, the distance between hubs in row L and the distance between the rows of l is equal to threefold increased the size of their diameter.



 

Same patents:

FIELD: mining and building, particularly material shifting devices adapted to releasably connect replaceable bit of excavation tooth with transitional extension structure fastened thereto.

SUBSTANCE: replaceable bit is telescopically put on transition extension and removably secured thereto by means of elongated flat connection unit provided with side peripheral part free of constriction. Connection unit extends in longitudinal direction through bit and connection orifices aligned with each other and prevents bit removal from transitional extension by forward movement thereof. Transversal support surface of bit side facing one end of connection unit prevents it outward passage through one bit orifice. Blocking member supported by another connection unit end and engaged with groove in another bit orifice prevents outward connection member passage through bit orifice provided with grooves. Support structure releasably retains the blocking member in closing and opening directions, which prevent blocking member displacement parallel to connection unit length.

EFFECT: simplified working tool replacement.

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FIELD: mechanical engineering; design of excavator dipper teeth.

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FIELD: dredgers or soil-shifting machines for special purposes, particularly to cut chaps in ground.

SUBSTANCE: device comprises at least one cutter brought into rotation and at least one the first cutting member to cut ground during cutter rotation in the first direction. At least one the second cutting member for ground cutting rotated in the second direction opposite to the first one is installed on the cutter. At least one of the cutting members may be shifted from the first ground cutting position to the second diverted position. Executive tool to shift the cutting member between the first and the second positions is also provided.

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FIELD: excavation equipment, particularly small metalwork for digging elements.

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EFFECT: reduced unit size, improved power and working characteristic, as well as wear-resistance characteristics.

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FIELD: mechanical engineering.

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Gas-dynamic ripper // 2244784

FIELD: mining industry; civil engineering.

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EFFECT: increased efficiency.

3 dwg

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Gas-dynamic ripper // 2244784

FIELD: mining industry; civil engineering.

SUBSTANCE: invention can be used in rippers of gas-dynamic action for loosening firm and frozen soils. Proposed gas-dynamic ripper has hollow rod housing installed coaxially and connected mechanically with housing of screw head with exhaust holes, vertically installed gui9de shaft for fastening on frame of base machine on which bracket is installed for longitudinal displacement with fitted-on bushings for connection with shaft, cocks to control delivery of compressed gas and pipelines to deliver compressed gas from supply source to gas distributor made in form of pneumatic accumulator with hollow shank secured on hollow rod housing, and ring housing with three ring channels in its wall rigidly connected with bracket, coaxially installed inner and outer supply pipes, exhaust control valve installed in screw head installed for limited axial displacement inside housing of screw head and interacting with seat for communicating ring clearance between seat and inner supply pipe with exhaust holes in housing of screw head are provided with control space and inner supply pipe arranged in control space, spring to press valve to seat, and piston for forced displacement of gas installed inside hollow rod housing for limited axial displacement. One of ring channels in wall of ring housing communicates through cock with pipeline to deliver compressed gas from supply source, and it communicates through radial channels made in ring housing through inner supply pipe with valve control space to communicate ring clearance between seat and inner supply pipe with exhaust holes in screw head housing. Space of pneumatic accumulator communicates with atmosphere and with supply source through compressed gas supply control cock, pipelines, ring channel with radial channels in wall of ring housing, radial channels and inner space in shank. Ring clearance between seat and inner supply pipe communicates with supply source through compressed gas supply cock, pipelines, ring channel with radial channels in wall of ring housing and outer supply pipe. Housing of pneumatic accumulator is made in form of hollow cylinder with lower and upper flanged parts provided with concentric holes for coaxial fastening of upper flanged part of pneumatic accumulator to flanged part of hollow shank, for coaxial fastening of lower flanged part of pneumatic accumulator to flanged part of hollow rod housing made at a distance from its upper end face equal to height of housing of pneumatic accumulator. Seat installed on upper end face of hollow rod housing for limiting upwards movement of forced gas displacement piston. Spring for limiting downward movement of forced gas displacement piston is installed on upper end face of seat to limit upward movement exhaust control valve. Outer supply pipe is installed in central hole of forced gas displacement piston.

EFFECT: increased efficiency.

3 dwg

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