Bearing slewing rim
(57) Abstract:Usage: the invention relates to the mechanisms of rotation of the platforms digging and lifting machines, and more particularly to a support and turning circles. The purpose of the invention: prevention point of contact between elements of the support - turntable (DIC) due to the redistribution of load occurs, the longitudinal - transverse deformations of the rail wheels. This is achieved by the PCR, including the top 1 and bottom 2 of the rail wheels with the support surface, the main liners 3 and 4, is provided with an additional liners 5 with two concave cylindrical surfaces 6 and 7, the symmetry axis which are mutually perpendicular and are located in parallel planes. Additional liners 5 are interoperable with their cylindrical surfaces 6 and 7 with liners 3 and 4, which ensures the preservation of a constant contact area regardless of the type of deformation of the rail wheels. Liners on one of the rails community, for example 1, fixed radially. The inserts 4 are provided stops to prevent slipping with additional inserts 5. Liners 3 and 4 and additional liners 5 are from the floor the e on the DIC when the occurrence of longitudinal and transverse strains in two mutually perpendicular planes, from the action of forces in various operations of the operating cycle of the machine. 3 Il. The invention relates to the mechanisms of rotation of the platforms digging and lifting machines, and more particularly to a support and turning circles.Known bearing slewing rim (PCR), including Central axle, skating circles and located between rollers, made in the form of the hub, forming with the non-rotating axle, a pair of slip, and the rim and hub with the rim are connected by an elastic coupling .The lack of known design is the appearance of longitudinal-transverse deformations of the rim when the perception of stress and the appearance point of contact between elements of the defence industry.The closest known designs is the PCR, including upper and lower rail circles with support surfaces and liners, interacting with each other .The disadvantage of this device is the appearance point of contact between elements of the PCR when the longitudinal-transverse deformations of the rail wheels.The purpose of the invention is the prevention point of contact between elements of the PCR due to the redistribution nagruzki, including upper and lower rail circles with support surfaces and liners, fitted with additional inserts with two concave cylindrical bearing surfaces, the axes of symmetry which are perpendicular to each other and are in parallel planes. Additional liners are installed with the possibility of interaction with inserts, and the inserts on one of the rail circles fixed radially.The proposed PCR complies with the requirement of "inventive step", because in the known constructions of the inventive features, aimed at the achievement of the technical result is not revealed.The essence of the invention lies in the fact that extra inserts between the upper and lower rail circles made with a cylindrical support surfaces for interaction with inserts ensures a constant contact area regardless of the type of deformation of the rail wheels. Perform additional inserts with cylindrical support surfaces, the axes of symmetry which are perpendicular to each other, and fastening inserts on one of the rail circles radially help to redistribute the loads acting nah, from the action of forces in various operations of the operating cycle of the machine.The proposed design allows you to create a plan that between the contacting surfaces of the elements of the PCR, an additional degree of freedom. Ensuring constant area of contact between elements of the PCR results in the prevention of point contact and uniform pressure at the contact areas.In Fig. 1 shows the design of the PCR; Fig. 2 - transverse strain; Fig. 3 - longitudinal strain.Bearing slewing rim includes an upper 1 and lower 2 rail wheels with the support surface, the main liners 3 and 4, additional liners 5 installed between the upper 1 and lower 2 rail circles having a concave cylindrical surface 6 and 7. Liners 3 and 4 are interoperable with cylindrical surfaces 6 and 7 additional liners 5 and inserts on one of the rails community, such as liners 3 top rail circle 1 fixed radially. Liners and additional liners are either made of polymeric material or metal with a polymer coating. The inserts 4 are provided stops to prevent descalza the ing part, therefore, it is industrially applicable.The device operates as follows.During operation of the excavator on the PCR act load, causing deformation of both the upper and lower rail circles. These loads are divided into active - from the forces of gravity of the boom and bucket with soil from inertial forces, as well as from efforts in pulling and lifting ropes, and weight - gravity mechanisms and sites of metal, having a constant value. In addition, the deformation of the sections of the base frame, and therefore, the lower rail circle are greatly affected by its bearing on the ground.The level of contact stresses depends on the contact area defined by the shape of the contacting bodies, and the load level on the contact connection. Digging excavator in the rotary platform, and therefore, the upper rail round 1 from the active forces and permanent weight loads occur longitudinal strain, and when the rotation of the bucket to discharge the base frame and, consequently, the lower rail round 2 encounter transverse deformation, since the support frame installed on uneven bottom, copy these irregularities. These deformations are the fact is rotating turntable relative to the reference frame of the excavator, between which is bearing slewing rim. The rotary platform is based through the top rail circle 1 with inserts 3, additional liners 5, which take the load from the turntable and transfer them to the lower rail circle 2, which are the inserts 4, the base frame of the excavator. Deformations are compensated by additional inserts 5, having two concave cylindrical surfaces 6 and 7, which are located in parallel planes and interact with liners 3 and 4 rail circles 1 and 2. Inserts one rail of a circle, for example 1, and are mounted thereon radially. When turning the turntable inserts 3 top rail circle, interacting with the cylindrical surface 6 additional inserts 5, move them together with the upper rail round 1. Additional liners 5 at the same time their cylindrical surfaces 7 are in interaction with inserts 4, which slide on the lower rail circle 2 with the rotation of the excavator.This device provides a constant contact area on the mating cylindrical surfaces of the liners and more the redistribution of loads, existing rail circles in the emergence of spatial deformations of the base frame and turntable.The advantage of the proposed design is that this device improves the reliability function of the turntable and the machine in General because it allows you to compensate for all kinds of deformations that occur on the upper and lower rail circles. Improves machine productivity by reducing downtime repairs associated with the failure of the PCR.Compared with the prototype  this design improves the performance of the excavator-dragline 1.1-1.2 times. Bearing SLEWING rim, including upper and lower rail circles with support surfaces and liners, characterized in that it is provided with extra liners made with two concave cylindrical bearing surfaces, the axes of symmetry which are perpendicular to each other and are in parallel planes, with additional liners are installed with the possibility of interaction with the main liners that on one of the rail circles fixed radially.
FIELD: forestry, in particular, processing apparatuses for tree harvesting machine used in tree felling and bunching equipment.
SUBSTANCE: supporting-rotating apparatus has base and rotary platform between which are positioned three rotating wheels and two intermediate members, said intermediate members being mounted between rotating wheels. Central brake is installed on rotary platform and is cooperating with base through joining link which is connected with its upper end through Hooke's universal joint and central brake to rotary platform and with its lower end through the same Hooke's universal joint to base. Link is adapted for changing its length by means of, for example, splined joint. Intermediate and lower rotary wheels are equipped with brakes. Intermediate rotary wheel brake is mounted on upper intermediate member. Lower rotary wheel brake is mounted on lower intermediate member. Rotary wheels are arranged at an angle with respect to each other. On rotation of rotary platform, rotation mechanism cooperates with one of rotary wheels. During operation on slopes, individual members of apparatus are rotated to thereby level rotary platform until it is rotated and set in horizontal plane.
EFFECT: increased efficiency by employing machine for felling and bunching trees on uneven felling areas and on slopes, reduced labor intensity, and provision for creating comfortable working conditions for operators.
FIELD: mechanical engineering.
SUBSTANCE: invention relates to slewing circles of cranes and other load-lifting machines. Proposed slewing circle consists of fixed and movable upper and lower races interconnected by bolts, and solids of revolution placed in between. Lower movable race is connected with gasket made of high-strength material installed from lower side of race. Said gasket can be sectional, with butts located in non-loaded zones and can be secured by bolts or glue.
EFFECT: increased durability of slewing circle.
FIELD: materials handling facilities.
SUBSTANCE: invention relates to turntables of cranes and other load lifting machines. Proposed turntable consists of fixed and movable upper and lower rings and roller solids of revolution arranged in cress-cross manner and installed in raceways. Ring step formed on raceways by rollers worn along ring is eliminated by sphere of ball solids of revolution installed between roller solids of revolution.
EFFECT: increased service life turntable.
SUBSTANCE: slewing device of mine excavator includes movable carrier ring, fixed support ring, toothed rim with lower attachment flange to housing of excavator undercarriage and taper rollers installed between carrier and support rings on axes of separators with possibility of free rolling between carrier and support rings along conic annular tracks made on rings. At that, axes of separator are fixed in separator housing and inclined relative to rotation axis of movable carrier ring. Toothed rim is equipped with inner projection, and carrier ring is equipped with outer projection with annular tracks. Projection of toothed rim is located above projection of carrier ring, and between projections in the appropriate separator there installed are rolling bodies with possibility of free rolling along annular tracks of projections.
EFFECT: higher reliability of slewing device, without applying any special requirements to properties, quality and technology of materials.
4 cl, 4 dwg
FIELD: machine building.
SUBSTANCE: proposed rim consists of central piece made solid or consisting of, at least, two sectors each representing a box-like welded housing from metal rolled stock. Every sector accommodates, at least, three elastic toothed cassettes each comprising elastic plate from sheet metal with cut teeth and elements ot secure plates on central piece.
EFFECT: longer life, lower weight.
4 cl, 2 dwg
FIELD: oil and gas industry.
SUBSTANCE: heading machine contains actuating device, support lifter, caged platform, electric equipment, control post, feeding mechanism, conveyor and chassis. In pivot mechanism located at chassis and driven by swing hydraulic cylinders spherical roller bearing is installed at bearing axis inside two-sided plain thrust bearing. Plain thrust bearing consists of assemblies (two at each side) segments in circumferential direction; segments are made of wear-resisting steel and are fixed by sunk screws.
EFFECT: decrease in dimensions and increase in service life of heading machine.
SUBSTANCE: proposed device is composed of roller turn table with symmetric circular thrust guides. Lower guide is mounted at running gear lower frame. Upper guide is arranged at turn table lower belt. Rails with support surface are arranged at said circuit thrust guides. Taper rollers with cylindrical pins are arranged between said rails. Rollers are connected with cages, isolating inserts and washers. Lubricators are arranged at centres of axes on outer side of roller turn table. Diameter of thrust guides is comparable with lower frame width. Upper and lower rails are equipped with grooves for plates to be bolted thereto at circular guides. Flanges are made at taper roller inner ends. Edges of rail inner ends and mating flange surface are arc-shaped. Relationship between flange OD and maximum spacing between rail bearing surfaces ≥1.1. Roller pins are elongated relative to said flange and outer ends. Aforesaid cage represents a circular shell arranged inside roller turn table. Axles are pinned to said cage. Gaskets are fitted between roller flange and circular shell. Washers are fitted on axles on outer side of rollers.
EFFECT: uniform distribution of loads, better reparability.
2 cl, 3 dwg
FIELD: construction; mining.
SUBSTANCE: group of inventions relates to mining and construction. Mine excavator comprises rotation and rolling support device for connection of upper and lower mechanisms. Rotation and rolling support device comprises roller device, ring gear wheel and upper roller path, lower roller path and independent side roller path to limit roller device rollers rotation. At that, upper roller path is fixedly attached to upper mechanism main rotary platform lower part, and lower roller path and side roller path are located on ring gear wheel upper part, located below roller device. Ring gear wheel has upper flat part on upper surface of which lower roller path and side roller path are located, annular toothed part and lower flat part fixedly fixed to lower mechanism bearing frame beam. At that circular toothed section is located on ring gear wheel side surface and relatively outside of upper flat part. Side roller path is connected with possibility of disconnection with lower roller path upper flat part upper surface. At that, upper roller path, lower roller path and side roller path are composed of segmented roller tracks, and contact surfaces between adjacent segmented roller tracks are inclined surfaces.
EFFECT: ease of excavator servicing, reduced time and labor input during replacement of worn-out parts.
7 cl, 15 dwg