The mechanism of rotation of the platform earthmovers
(57) Abstract:The invention relates to a sealing technique and can be used for sealing oil baths drives rotation of construction and road machinery. The purpose of the invention is to enhance reliability seal oil bath and durability of the sealing element. The seal mechanism of the swing excavator contains the gearbox with the engine mounted on the rotary platform. Leading gear kinematically connected to the fixed ring gear, which is located on the chassis frame on which is fixed an annular shell. The crown of the bottom sheet, the chassis frame and the body form an oil bath, which is oil. Leading gear is located in an oil bath. At the end of the shell is fixed curved sheet with emphasis. Between the sheet and the rotary platform X-shaped sealing element, with the possibility of self-talk and interaction in two planes. It is made of elastic material. The stop serves to prevent displacement of the sealing element from the sheet. 3 C. p. F.-crystals, 3 ill. The invention relates to the mechanisms of rotation of the platform, enclosed in an oil bath, and can be used for g/P> Known sealing mechanism swing excavator, containing the gearbox with the engine mounted on the platform, a pinion gear mounted on the output shaft and kinematically associated with a gear wreath placed on the chassis, an oil bath, formed a ring gear, the ring sides, bottom and top plate and provided with a V-shaped sealing element.This seal design of the rotation mechanism has a high complexity of manufacturing due to the fact that the design contains upper and lower leaf oil bath.Known sealing mechanism swing excavator, containing the gearbox with the engine mounted on the rotary platform, a pinion gear mounted on the output shaft and kinematically associated with a gear wreath placed on the chassis, an oil bath, formed a ring gear, the bottom sheet of the chassis frame, the annular shell and the rotating platform at the end of the annular shell is stationary V-shaped elastic sealing element.In this arrangement, the seal oil bath and sliding during rotation of the turntable is carried out on one the STI, that reduces its durability. Replacement of the sealing element during operation has a high complexity due to the fact that it is fixed to the ring the ring motionless. In addition, since the sealing element is stationary, he is not able to samoustraniajutsia.The invention is directed to improving the reliability of the seal oil bath and durability of the sealing element.This is achieved by the design of the mechanism of rotation of the platform earthmovers, comprising placed on the frame swivel bearing with a ring gear, a rotary platform mounted on it a gear on the output shaft with the gear kinematically connected with a ring gear rotatable support located in a closed housing with an oil bath, is X-shaped in cross-section of the mechanical sealing element of elastic material. This item is installed in pojetom state between the annular surfaces of the platform and frame with self-talk and interaction in two planes during movement of the platform relative to the frame.When the rotation of the turntable is adjust to any misalignment of the X-obraznogo provides improved reliability seal oil bath.The slide and the interaction of X-shaped element with the annular surfaces of the rotary platform and the frame is alternately depending on the magnitude of the friction force arising at the site of contact of the seal ring surfaces, i.e., the slip occurs alternately on the two surfaces. As a result, increases the durability of the sealing element. To prevent displacement of the X-shaped sealing element outside annular surfaces made emphasis in the form of a collar on the outer or inner side of the sealing element. In addition, the sealing element can be made reinforced.The invention is illustrated in the drawing, where Fig. 1 shows the rotation mechanism earthmovers, elevation, and Fig. 2 with the clamp placed on the outer side of the sealing element of Fig. 3 with reinforced sealing element.Position in the drawing indicate:
1 Reducer; 2 engine; 3 rotary platform; 4 gear; 5 - output shaft of the gearbox; 6 swivel bearing with a ring gear; 7 - frame; 8 - annular rings; 9 closed housing with an oil bath; 10 X-shaped sealing element of elastic matatalino element; 13 the annular sealing surface of the platform; 14 the emphasis in the form of a collar placed on the outer side of the sealing element; 15 reinforced sealing element.The mechanism of rotation of the platform earthmovers contains placed on the frame 7 swivel bearing with a ring gear 6, the turntable 3, on which is fixed the gear 1. On the output shaft 5 of the gear 1 gear set 4, kinematically connected with a ring gear 6. On the lower sheet frame 7 is fixed annular shell 8. The fixed ring gear 6, the bottom sheet of the chassis frame 7 and the annular ring 8 to form a closed housing oil bath 9. Leading gear 4 and the gear 6 are placed in the housing with oil bath 9. At the end of the annular shell 8 is fixed a circular sheet with a focus in the form of a collar 12, which forms an annular sealing surface of the frame 11. The emphasis in the form of a collar 12 is located on the ring sheet on the inner side of the sealing element. Between the annular sealing surfaces of the frame 11 and the platform 13 is the end of the X-shaped in cross-section of the sealing element 10 of elastic material in pojetom condition with the possibility of self-talk and interaction in two annular ploskostnoi element 10 outside annular surfaces.In the variant shown in Fig. 2, the emphasis in the form of a collar 14 is made on the annular sheet on the outer side of the sealing element 10.In the variant shown in Fig. 3 shows a reinforced sealing element 15.The seal mechanism of the swing excavator works as follows.When turning on the engine 2 torque transmitted via the output shaft 5 of the gear 1 top gear 4. Gear 4, objetivas on a fixed toothed crown 6, causes the rotation of the platform 3 with the lubrication of the teeth.X-shaped sealing element located between the sealing surfaces of the frame 11 and the platform 13, carries the seal oil bath 9 from leaking oil. This is achieved by the fact that the X-shaped sealing element during the rotation of the platform 3 samoustranyaetsya due to its elastic properties. Slide X-shaped element on the ring surfaces is carried out alternately on the annular surface 11 or 13 depending on the amount of friction between these surfaces. 1. The mechanism of rotation of the platform earthmovers, comprising placed on the frame rotate the gear set, kinematically connected with a ring gear rotatable support located in a closed housing with an oil bath having end sealing element of elastic material, characterized in that the end sealing element is designed X-shaped in cross section and is installed in pojetom state between the annular surfaces of the platform and frame with self-talk and interaction in two planes during movement of the platform relative to the frame, with the annular sealing surface of the rotary support has a stop in the form of a collar.2. The mechanism under item 1, characterized in that the clamp placed inside the X-shaped sealing element.3. The mechanism under item 1, characterized in that the clamp is located on the outer side of the X-shaped sealing element.4. The mechanism under item 1, characterized in that the X-shaped sealing element is designed reinforced.
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