The mechanism of swing excavator
(57) Abstract:The invention relates to earth moving equipment, namely drives the swing compact excavators. The mechanism of swing excavator contains a rotation device, the inner race of the bearings which are associated with the platform, the outer cage - frame chassis and a hydraulic motor with an output shaft. One end of the output shaft connected directly to the rotor of the hydraulic motor, and a second end fixedly mounted on the frame of the chassis by means of a toothed coupling. The casing of the hydraulic motor is connected with the platform by means of a lever rigidly connected to the housing, and a leash, pivotally connected with the lever and the platform. An output shaft provided with a channel for supplying a working fluid to the hydraulic mechanisms of the suspension. Simplified design, improved reliability of the device. 1 C. p. F.-ly, 2 Il. The invention relates to earth moving equipment, namely drives the swing compact excavators, and is aimed at simplifying the design of the actuator, increasing its efficiency, reliability and durability.The mechanism of swing excavator, output shaft (see SU 1668580, IPC E 02 F 9/12, 1989).The disadvantages of the known device is the design complexity and low efficiency of the drive, due to power losses in numerous kinematic pairs.Also known mechanism of swing excavator containing the rotation device, the inner race of the bearings which are associated with the platform, the outer cage - frame chassis, the hydraulic motor and the output shaft (see Berkman, I. L., Renew A. C., RAM A. K. Universal shovel construction excavators. -M.: Higher school", 1981, S. 171, Fig.173).This unit is adopted for the prototype.The disadvantages of the prototype are the complexity and low reliability of the drive, as well as its low efficiency.The essence of the invention is that the mechanism of swing excavator containing the rotation device, the inner race of the bearings which are associated with the platform, the outer cage - frame chassis and a hydraulic motor with an output shaft, one end of the output shaft connected directly to the rotor of the hydraulic motor, and a second end fixedly mounted on the frame of the chassis by means of a toothed clutch, if this is the appropriate fields, and leash, pivotally connected with the lever and with the platform. In addition, the drive shaft is provided with a channel for supplying a working fluid to the hydraulic mechanisms of the suspension.Declare a set of essential features allows to obtain the following technical result.The connection of one end of the output shaft directly with the rotor of the hydraulic motor and the fixed fastening the second end of the shaft on the frame of the chassis when the pair of housings hydraulic platform allows you to transfer torque from the hydraulic motor directly to the rotary platform without using a gearbox and a kinematic pair of gear - bagauda gear, which significantly increases the efficiency of the rotation mechanism. When this is achieved the simplicity and compactness of the actuator, its durability and reliability.The coupling of the second end of the output shaft to the frame of the chassis by means of a toothed coupling provides a guaranteed clearance to compensate for the distortions of the output shaft when the bearing wear turntable.Pair housing of the hydraulic motor with the platform via a lever rigidly connected to the housing gidada, arising during the operation of the hydraulic motor, and compensates for the plane-parallel motion of the body of the latter.The supply of the drive shaft with a channel for supplying a working fluid to the hydraulic mechanisms of the chassis eliminates the use of the reservoir for transferring fluid from a rotating platform excavator to its chassis, which also simplifies the design and increases its reliability and durability.In Fig.1 shows the mechanism of the swing excavator, top view; Fig.2 - section a-a in Fig.1.The mechanism of rotation of the platform 1 excavator contains rotation device 2, the inner ring 3 bearing 4 which is associated with the platform 1 and the outer ring 5 with the frame 6 of the chassis of the excavator.As the power element drive rotation of the platform 1 is applied, high-torque rotary-planetary hydraulic motor 7, the rotor 8 is coupled directly to the output shaft 9. The second end of the shaft 9 is still connected with the frame 6 of the chassis with help of gear clutch 10, which allows to compensate for wear of the bearing assemblies. The shaft 9 provided with a channel 11 for supplying a working fluid with a rotating platform 1 to gidravlicheskiy 1 by means of the lever 13, rigidly connected to the housing 12 and the lead 14, pivotally connected with the lever 13 and the platform 1.The mechanism of rotation of the platform 1 is as follows.When the flow of the operating fluid in the hydraulic motor 7, the housing 12 begins to rotate together with the platform 1 around the fixed shaft 9, paired with the rotor 8. Due to the kinematic connection of the housing 12 with the platform 1 through the lever 13 and the lead 14 is provided by the perception of the reactive torque of the hydraulic motor 7 and is compensated by its plane-parallel motion.The proposed mechanism of rotation of the platform has simplicity and compactness with high efficiency, making it highly effective when used in small-sized excavators. 1. The mechanism of swing excavator containing the rotation device, the inner race of the bearings which are associated with the platform, the outer cage - frame chassis and a hydraulic motor with an output shaft, wherein one end of the output shaft connected directly to the rotor of the hydraulic motor, and a second end fixedly mounted on the frame of the chassis by means of a toothed clutch, the housing of the hydraulic motor associated with the platform with the/P> 2. The mechanism under item 1, characterized in that the output shaft is provided with a channel for supplying a working fluid to the hydraulic mechanisms of the suspension.
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