CN109132883B - Crane based on flat special-shaped rotary platform - Google Patents
Crane based on flat special-shaped rotary platform Download PDFInfo
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- CN109132883B CN109132883B CN201811120537.6A CN201811120537A CN109132883B CN 109132883 B CN109132883 B CN 109132883B CN 201811120537 A CN201811120537 A CN 201811120537A CN 109132883 B CN109132883 B CN 109132883B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/16—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
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- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention provides a crane based on a flat special-shaped rotary platform, which comprises a base, a slewing bearing, a rotary platform, a rotary driving device, a suspension arm and a tripod, wherein the rotary platform adopts two parallel rib plate groups; the structural design of the front and rear centering rib plate groups is beneficial to the dispersion of the stress of the rotary platform, the structural stability of the rotary platform can be obviously improved, the rotary platform is provided with a shaft hole, a shaft sleeve is arranged in the shaft hole, a rotary driving device is arranged in the shaft hole, the maintenance and the replacement are convenient, and the tripod adopts two connecting modes of welding and flange connection, so that the assembly and the disassembly are convenient, and the transportation is convenient.
Description
Technical Field
The invention relates to the field of crane equipment, in particular to a crane based on a flat special-shaped rotary platform.
Background
With the gradual exhaustion of landing land resources, the development direction of the resources is expanded to the ocean, the ocean resources will occupy the dominant position of world resources in the future, and become the focus of vigorous competition of various countries, and an advanced ocean crane is required to transport goods and equipment for developing the ocean resources, and the pile leg surrounding type ocean crane is usually installed on the deck of the main body or the hull of the ocean platform around the pile leg, and is widely applied due to the advantages of small occupied platform space, compact structure, large lifting capacity, long lifting radius and the like.
The patent document with the application number of 201610334639.2 and the publication date of 2016.11.09 discloses a pile leg type offshore platform crane, the bottom of a rotating platform of the pile leg type offshore platform crane is provided with a mounting frame, the mounting frame comprises a connecting piece and a bearing piece, the position of the outer peripheral wall of a base corresponding to the mounting frame is provided with a bearing plate, a forward annular roller group is clamped between the top surface of the bearing plate and a slideway on the bottom surface of the rotating platform, a reverse annular roller group is clamped between the bottom surface of the bearing plate and the top surface of the bearing piece, a radial sliding bearing is arranged on the inner side wall of the slideway corresponding to the position of the base, a sliding bearing pair is formed by the radial sliding bearing and the base, the herringbone frame comprises two portal frame components, the two portal frame components are symmetrically arranged relative to the pile leg, each portal frame component comprises a vertical rod and a diagonal rod, the vertical rod is mutually perpendicular to the rotating platform, the top of the diagonal rod is connected with the top of the vertical rod, the structure can reduce the manufacturing cost to a certain extent, but after the mounting frame is arranged at the bottom of the rotating platform, the height of the rotating platform is greatly increased, so that the gravity center of the whole crane is raised, and instability is increased; the rib plate design of the rotary platform is all criss-cross structural arrangement, so that the stress dispersion is not facilitated, and the structural design is only suitable for small-tonnage cranes.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the crane based on the flat special-shaped rotary platform, which is used for optimally designing the prior art, so that the crane has a stable structure, balanced stress and simple and convenient assembly and maintenance.
In order to achieve the above purpose, the technical scheme of the invention is as follows: the crane based on the flat special-shaped rotary platform comprises a base, a rotary support, a rotary platform, a rotary driving device, a suspension arm and a tripod, wherein an outer ring of the rotary support is connected with the top of the base, an inner ring of the rotary support is connected with the bottom of the rotary platform, the rotary driving device is arranged on the rotary platform, the bottom end of the suspension arm is hinged on the rotary platform, the tripod is arranged on the top of the rotary platform, the rotary platform comprises a bottom plate, a fixed flange, a vertical rod seat, a diagonal rod seat, a suspension arm seat, a top plate and a rib plate group, one side of the bottom plate is provided with a chamfer, a pile leg penetrating hole is formed in the bottom plate, and the pile leg penetrating hole is arranged close to one side of the chamfer; the fixed flange is arranged on the bottom surface of the bottom plate and is coaxially arranged with the pile leg penetrating holes; the vertical rod seat, the inclined rod seat and the suspension arm seat are all vertically arranged on the top surface of the bottom plate, and the top ends of the vertical rod seat, the inclined rod seat and the suspension arm seat are all provided with hinge holes; the top ends of the vertical rod seat and the inclined rod seat penetrate through the top plate, and hinge holes on the vertical rod seat and the inclined rod seat protrude out of the top plate; the rib plate groups are arranged between the top plate and the bottom plate, each rib plate group comprises a parallel rib plate group and a centering rib plate group, each centering rib plate group comprises a rear centering rib plate group and a front centering rib plate group, the rib plates between the vertical rod seats and the inclined rod seats on the same side are parallel rib plate groups which are arranged in parallel, the rib plates between the opposite vertical rod seats are rear centering rib plate groups which are arranged in a centering way, and the rib plates between the opposite inclined rod seats are front centering rib plate groups which are arranged in a centering way;
the upper end of the connecting sleeve is connected with the lower end of the upper fixed seat, the lower end of the connecting sleeve is connected with the upper end of the lower fixed seat, and the transmission shaft is arranged in the connecting sleeve; the speed reducer is arranged at the top end of the upper fixing seat, and an output shaft of the speed reducer is connected with the upper end of the transmission shaft; the hydraulic motor is arranged at the top end of the speed reducer, and an output shaft of the hydraulic motor is connected with an input shaft of the speed reducer; the herringbone driving gear is arranged at the bottom end of the output shaft;
the base comprises a body with an inverted cone-shaped annular structure, the bottom end of the body is small, the top end of the body is large, the base flange is arranged on the top surface of the body and is coaxial with the body, more than two bolt holes are formed in the base flange, more than one reinforcing rib which is uniformly distributed along the circumference of the inner wall is arranged on the inner wall of the body, and more than one reinforcing ring which surrounds the circumference of the inner wall and is connected with each reinforcing rib is arranged on the inner wall of the body;
the tripod comprises a first portal and a second portal, the first portal comprises a first vertical rod, a first diagonal rod, a first pulley seat and a first tie rod, the top ends of the first pulley seat and the first diagonal rod are welded together, the top ends of the first vertical rod and the first pulley seat are connected through bolts and nuts, a first tie rod is arranged between the first vertical rod and the first diagonal rod, the first tie rod comprises a first tie rod a section, a first tie rod b section and a first tie rod c section, one end of the first tie rod a section is connected with the first vertical rod, the other end of the first tie rod a section is provided with a flange, the two ends of the first tie rod b section are respectively provided with a flange, one end of the first tie rod c section is connected with the first diagonal rod, one end of the first tie rod b section is connected with one end of the flange, and the other end of the first tie rod b section is connected with one end of the flange; the second door frame comprises a second vertical rod, a second diagonal rod, a second pulley seat and a second pull rod, the second pulley seat and the second diagonal rod are welded together, the second vertical rod and the second pulley seat are connected through bolts and nuts, a second tie rod is arranged between the second vertical rod and the second diagonal rod, the second tie rod comprises a second tie rod a section, a second tie rod b section and a second tie rod c section, one end of the second tie rod a section is connected with the second vertical rod, the other end of the second tie rod a section is provided with a flange, both ends of the second tie rod b section are provided with flanges, one end of the second tie rod c section is connected with the second diagonal rod, the other end of the second tie rod c section is provided with a flange, one end of the second tie rod b section is connected with one end of the second tie rod a section provided with a flange, and the other end of the second tie rod b section is connected with one end of the second tie rod c section provided with a flange; a main cross rod is arranged between the first pulley seat and the second pulley seat, and comprises a main cross rod a section, a main cross rod b section and a main cross rod c section, wherein one end of the main cross rod a section is connected with the first pulley seat, the other end of the main cross rod a section is provided with a flange, both ends of the main cross rod b section are provided with flanges, one end of the main cross rod c section is connected with the second pulley seat, the other end of the main cross rod c section is provided with a flange, one end of the main cross rod b section is connected with one end of the main cross rod a section provided with a flange, and the other end of the main cross rod b section is connected with one end of the main cross rod c section provided with a flange; more than one auxiliary cross bar is arranged between the first vertical bar and the second vertical bar; the novel horizontal pull rod comprises a first diagonal rod, a second diagonal rod, a third horizontal pull rod c and a third horizontal pull rod c, wherein more than one third horizontal pull rod is arranged between the first diagonal rod and the second diagonal rod, the third horizontal pull rod comprises a third horizontal pull rod a section, a third horizontal pull rod b section and a third horizontal pull rod c section, one end of the third horizontal pull rod a section is connected with the first diagonal rod, flanges are arranged at the two ends of the third horizontal pull rod b section, one end of the third horizontal pull rod c section is connected with the second diagonal rod, flanges are arranged at the other end of the third horizontal pull rod c section, one end of the third horizontal pull rod b section is connected with one end of the third horizontal pull rod a section, and one end of the third horizontal pull rod b section is provided with a flange;
the hydraulic motor is adopted as a power source, so that the hydraulic motor adopts a closed structure design, the internal elements cannot be corroded by ocean humid air, and the service life can be effectively prolonged; the rotary driving device is arranged on the rotary platform through the shaft sleeve, and as the rotary driving device can be subjected to strong reaction force of the rotary support during rotation of the crane, the reaction force can act on the rotary platform through the rotary driving device, the part, connected with the rotary platform, of the rotary driving device can be worn out by the long-time operation of the crane, the rotary platform is huge in size and inconvenient to maintain, the shaft sleeve is arranged between the rotary driving device and the rotary platform, the reaction force acting on the rotary driving device can act on the rotary platform through the shaft sleeve again, and therefore the shaft sleeve can be worn out firstly, and if maintenance is needed, only the shaft sleeve needs to be replaced; the transmission shaft is arranged in the shaft sleeve, and the speed reducer can be arranged outside the rotary platform, so that the heat dissipation of the speed reducer is facilitated;
the body of the base adopts an inverted cone-shaped annular structure with a small bottom end and a large top end, so that the base can adapt to a larger-size slewing bearing, the stability of the crane is improved, and the structural strength of the base can be improved due to the arrangement of the reinforcing ribs and the reinforcing rings; meanwhile, the front centering rib plate group is arranged on the rotary platform, the front centering rib plate group can uniformly disperse stress generated when the front centering rib plate group is welded to prevent local deformation, and the pressure born by the suspension arm can be uniformly dispersed to each part connected with the front centering rib plate group through the front centering rib plate group when the crane works; the rear centering rib plate group can uniformly disperse stress generated in the welding process to prevent local deformation, and the pressure applied to the vertical rod of the tripod, the pulling force of goods on the winch and the like can be uniformly dispersed to each part connected with the rear centering rib plate group through the rear centering rib plate group when the crane works, so that the structure of the rotary platform is stable; the two sides of the rotary platform are mainly under the pressure action of the tripod, the rib plates are arranged in parallel, so that the bending strength of the rib plates can be improved, and the rib plates are easy to position and convenient to operate during welding processing, so that working hours are saved, and the efficiency is improved.
In addition, the first pulley seat and the first vertical rod are fastened through bolts and nuts, and the first portal frame can be conveniently detached, so that the first portal frame is convenient to transport and maintain; when the crane works, the pressure born by the first pulley seat is mainly transmitted to the rotary platform through the first inclined rod, so that the strength of connection between the first pulley seat and the first inclined rod can be enhanced through welding connection, the structural stability of the tripod is ensured, the first transverse pull rod, the first vertical rod and the first inclined rod can form a triangular structure, the triangular structure is stable, and the stability of the first portal can be effectively enhanced; the second pulley seat is fastened with the second vertical rod through bolts and nuts, and the arrangement can facilitate the disassembly of the second door frame and the transportation and the maintenance; when the crane works, the pressure born by the second pulley seat is mainly transmitted to the rotary platform through the second inclined rod, so that the strength of connection between the second pulley seat and the second inclined rod can be enhanced through welding connection, and the structural stability of the tripod is ensured; the second transverse pull rod, the second vertical rod and the second diagonal rod can form a triangular structure, the triangular structure is stable, and the stability of the second portal frame can be effectively enhanced; the main cross rod is arranged to connect the first portal and the second portal, and the first portal and the second portal are connected into a whole through the main cross rod, so that the stability is improved; the third tie rod is connected with the first diagonal rod and the second diagonal rod, so that stability between the first portal frame and the second portal frame can be enhanced, and the first diagonal rod and the second diagonal rod are prevented from being bent easily due to overlong length.
Further, a first amplitude winch is arranged at a position, close to the first portal, on the rotary platform; the second derricking winch is arranged at the position of the second portal, the derricking device is arranged at the top end of the boom, a first steel wire rope extends out of the first derricking winch, and the first steel wire rope bypasses the first pulley seat and is connected with the derricking device; the second luffing winch is internally extended with a second steel wire rope, the second steel wire rope bypasses the second pulley seat and is connected with the luffing device, when the luffing jib needs luffing, the first luffing winch and the second luffing winch are started, the first steel wire rope and the second steel wire rope can be simultaneously lengthened or shortened, the luffing jib is lifted or lowered through the luffing device, and the luffing jib can stably run in the luffing process due to the simultaneous action of the first luffing winch and the second luffing winch.
Furthermore, more than three fixing holes are uniformly distributed on the fixing flange around the axis of the fixing flange, counter sunk holes are formed in the upper ends of the fixing holes, and bolts can penetrate through the fixing holes to connect the rotary platform with the rotary support.
Further, a first transverse rib communicated with each rib plate is arranged on the inner side of the rib plate group, a second transverse rib communicated with each rib plate is arranged on the outer side of the rib plate group, and the inner sides of the rib plates are connected in series by the first transverse rib; the outer sides of the rib plates are connected in series through the second transverse ribs, so that the connection between the rib plates is firmer, and the strength of the rotary platform is improved.
Further, an outer side plate is arranged along the outer contours of the top plate and the bottom plate, the suspension arm seat penetrates through the outer side plate, and the hinge hole on the suspension arm seat protrudes out of the outer side plate; the inner side plate is arranged between the top plate and the bottom plate along the edge of the pile leg penetrating hole, and the top plate, the bottom plate and the rib plates are connected into a closed cage type whole through the outer side plate and the inner side plate, so that the strength of the rotary platform is greatly enhanced.
Further, the number of the shaft holes is three, the shaft holes are distributed on the circumference taking the shaft center of the pile leg penetrating hole as the center, the distance between the adjacent shaft holes is equal, two shaft holes are used in normal operation, and one shaft hole is reserved for standby.
Further, the two ends of the hinge holes on the vertical rod seat, the inclined rod seat and the suspension arm seat are respectively provided with a reinforcing ring, and the contact area between the bolt and the hinge holes can be increased by arranging the reinforcing rings, so that the hinge holes are prevented from being deformed.
Furthermore, the outer circumference of the outer ring of the slewing bearing is provided with herringbone teeth which are meshed with the herringbone driving gear; the baffle plate for resisting the herringbone driving gear is arranged at the bottom end of the transmission shaft, the herringbone gear is selected for transmission, and because the straight gear has weak bearing capacity and large impact, vibration and noise, the herringbone gear is not suitable for precise transmission, compared with the straight gear, the helical gear has the advantages of strong bearing capacity, stable transmission, small impact, vibration and noise and the like, but when the helical gear works, the axial force of the shaft can be generated, the generated axial force can act on the bearing of the fixed shaft and the bearing of the slewing bearing, the abrasion of the bearing is accelerated, and because the herringbone gear can be regarded as two helical gears which are symmetrically distributed, the herringbone gear can eliminate the axial force, and the herringbone gear has the advantages of high contact ratio, high bearing capacity and stable work; the baffle can resist the herringbone driving gear and prevent the herringbone driving gear from falling off the transmission shaft.
Further, the upper end of the connecting sleeve is connected with the lower end of the upper fixing seat in a welding mode; the lower end of the connecting sleeve is connected with the upper end of the lower fixing seat in a welding mode, and is connected in a welding mode, so that a connecting piece is not needed, the occupied volume is small, and the connection is reliable.
Further, a tapered roller bearing is arranged between the transmission shaft and the upper fixing seat; a tapered roller bearing is arranged between the transmission shaft and the lower fixing seat; the bearing end cover for sealing and fixing the bearing at the lower end is arranged at the lower end of the lower fixing seat, and the tapered roller bearing can bear larger radial load than the ball bearing and has strong bearing capacity; the bearing end cover can resist the lower end bearing to prevent the lower end bearing from falling out, and a sealing ring can be arranged on the bearing end cover.
Drawings
Fig. 1 is a front view of a crane according to an embodiment of the present invention.
Fig. 2 is a top view of a crane according to an embodiment of the invention.
Fig. 3 is a front view of the base of the present invention.
Fig. 4 is a top view of the base of the present invention.
Fig. 5 is a perspective view of a rotary platform according to the present invention.
Fig. 6 is a schematic view of a structure of the rotary platform according to the present invention with the top plate, the inner side plate and the outer side plate removed.
Fig. 7 is a top view of the rotary table of the present invention with the top plate removed.
Fig. 8 is a schematic structural view of a swing driving device according to the present invention.
Fig. 9 is a plan view of the swing drive device according to the present invention.
Fig. 10 is an enlarged view at a in fig. 8.
Fig. 11 is an enlarged view at B in fig. 8.
Fig. 12 is a schematic structural view of a tripod according to the present invention.
Fig. 13 is a schematic structural view of the first portal in the present invention.
Fig. 14 is a schematic structural view of a second portal in the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
As shown in fig. 1 to 14: a crane based on a flat special-shaped rotary platform comprises a base 1, a rotary support 2, a rotary platform 3, a rotary driving device 4, a suspension arm 5 and a tripod 6, wherein the outer ring of the rotary support 2 is connected with the top of the base 1, the inner ring of the rotary support 2 is connected with the bottom of the rotary platform 3, the rotary driving device 4 is arranged on the rotary platform 3, one end of the suspension arm 5 is hinged on the rotary platform 3, and the tripod 6 is arranged on the top of the rotary platform 3.
The base 1 comprises a body with a reverse conical annular structure, wherein the bottom end of the body is small, the top end of the body is large, the base flange 10 is arranged on the top surface of the body, the base flange 10 and the body are coaxially arranged, more than two bolt holes 11 are formed in the base flange 10, more than one reinforcing rib 12 which is uniformly distributed along the circumference of the inner wall of the body is arranged on the inner wall of the body, and more than one reinforcing ring 13 which is parallel to the upper surface and the lower surface of the body and is connected with each reinforcing rib 12 is arranged in the inner wall of the body.
The rotary platform 3 comprises a bottom plate 31, a fixed flange 32, a vertical rod seat 33, a diagonal rod seat 34, a suspension arm seat 35, a top plate 36 and a rib plate group.
A chamfer is arranged on one side of the bottom plate 31, and a pile leg penetrating hole is formed in the bottom plate 31 and close to one side of the chamfer; the fixed flange 32 is arranged on the bottom surface of the bottom plate 31, the fixed flange 32 and the pile leg penetrating holes are coaxially arranged, more than three fixed holes are uniformly distributed on the fixed flange around the axis of the fixed flange, and countersunk holes are formed in the upper ends of the fixed holes. Through the fixed orifices, the rotary platform can be connected with a rotary support on the crane.
The vertical rod seat 33, the inclined rod seat 34 and the suspension arm seat 35 are vertically arranged on the top surface of the bottom plate 31, the top ends of the vertical rod seat 33, the inclined rod seat 34 and the suspension arm seat 35 are respectively provided with a hinge hole, the axial direction of each hinge hole is parallel to the plane where the bottom plate 31 is positioned, specifically, the hinge holes on the suspension arm seat 35 are arranged on one side of the top end of the suspension arm seat 35, the top ends of the vertical rod seat and the top ends of the inclined rod seat penetrate through the top plate and are protruded out of the top plate, reinforcing rings are arranged at the two ends of the hinge holes, the bottom ends of the vertical rod seat 33, the inclined rod seat 34 and the suspension arm seat 35 are welded on the bottom plate 31, and after the top plate 36 is arranged, the vertical rod seat 33, the inclined rod seat 34 and the suspension arm seat 35 are welded with the top plate 36, so that the structural design can disperse the forces born by the vertical rod seat 33, the inclined rod seat 34 and the suspension arm seat 35, and the structure of the rotary platform is stable; the reinforcing rings are arranged at two ends of the hinge hole, so that the contact area between the bolt and the hinge hole can be increased and the hinge hole is prevented from being deformed by arranging the reinforcing rings.
The rib plate group is arranged between the top plate 36 and the bottom plate 31, the rib plate group comprises a parallel rib plate group 371 and a centering rib plate group 372, the centering rib plate group 372 comprises a rear centering rib plate group 3722 and a front centering rib plate group 3721, the rib plates between the vertical rod seats 33 and the inclined rod seats 34 on the same side are parallel rib plate groups 371 which are arranged in parallel, the rib plates between the opposite vertical rod seats 33 are rear centering rib plate groups 3722 which are arranged in a centering way, and the rib plates between the opposite inclined rod seats 34 are front centering rib plate groups 3721 which are arranged in a centering way; the inner side of the rib plate group is provided with a first transverse rib 38 communicated with each rib plate, and the outer side of the rib plate group is provided with a second transverse rib 39 communicated with each rib plate. In the structure, the front centering rib plate group 3721 can uniformly disperse stress generated in the process of welding the front centering rib plate group 3721 to prevent local deformation, and the pressure born by the suspension arm can be uniformly dispersed to each part connected with the front centering rib plate group 3721 through the front centering rib plate group 3721 when the crane works; the rear centering rib plate group 3722 can uniformly disperse stress generated in the process of welding the rear centering rib plate group 3722 to prevent local deformation, and the pressure born by the vertical rods of the tripod, the pulling force of goods on the winch and the like can be uniformly dispersed to each part connected with the rear centering rib plate group through the rear centering rib plate group 3722 when the crane works, so that the structure of the rotary platform is stable; the two sides of the rotary platform are mainly under the pressure action of the tripod, the parallel arrangement of the parallel rib plate groups 371 finally enables two adjacent rib plates, the bottom plate 31 and the top plate 36 to form a rectangular structure, under the condition that the sectional areas are equal and the heights are equal, the sectional moment of inertia of the rectangular structure is larger than that of a triangle or trapezoid, the structural arrangement can obviously improve the bending strength of the rotary platform, and the rib plates are simple to position during welding processing, the operation is simple and convenient, working hours are saved, and the efficiency is improved. The first transverse ribs 38 connect the inner sides of the rib plates in series; the outer sides of the rib plates are connected in series by the second transverse ribs 39, so that the connection between the rib plates is more stable, and the strength of the rotary platform is improved.
The top plate 36 is provided with three shaft holes 310 penetrating the top plate 36 and the bottom plate 31, the shaft holes 310 are distributed on a circumference centering on the shaft center of the leg hole, and a shaft sleeve 311 is provided in the shaft hole 310. The shaft sleeves are arranged in the shaft holes, so that the rotary driving device can be conveniently installed, and normally, only the rotary driving device is arranged in two shaft holes 310, and one set of rotary driving device can be added in the third shaft hole if the power is insufficient.
An outer side plate 312 is arranged along the outer contours of the top plate 36 and the bottom plate 1, the boom seat 35 penetrates through the outer side plate, and the hinge hole on the boom seat 35 protrudes out of the side plate; an inner side plate 313 is provided between the top plate 36 and the bottom plate 31 along the edge of the leg hole. By arranging the outer side plate 312 and the inner side plate 313, the top plate 36, the bottom plate 31 and the rib plate are connected into a closed cage type integral body, so that the strength of the rotary platform is greatly enhanced.
The rotary driving device 4 comprises a hydraulic motor 41, a speed reducer 42, an upper fixed seat 43, a connecting sleeve 44, a lower fixed seat 45, a transmission shaft 46 and a herringbone driving gear 47, wherein the upper end of the connecting sleeve 44 is welded with the lower end of the upper fixed seat 43, the lower end of the connecting sleeve 44 is welded with the upper end of the lower fixed seat 45, an upper tapered roller bearing 466 is arranged at the upper end of the transmission shaft 46, a lower tapered roller bearing 467 is arranged at the lower end of the transmission shaft 46, the transmission shaft 46 is arranged in the connecting sleeve 44 through the upper tapered roller bearing 466 and the lower tapered roller bearing 467, the speed reducer 42 is arranged at the top end of the upper fixed seat 43, and an output shaft of the speed reducer 42 is connected with the upper end of the transmission shaft 46; the hydraulic motor 41 is arranged at the top end of the speed reducer 42, and an output shaft of the hydraulic motor 41 is connected with an input shaft of the speed reducer 42; the rotary driving device 4 is arranged on the rotary platform 3 through the shaft sleeve 311, the hardness of the shaft sleeve 311 is lower than that of the rotary platform 3, and when the rotary platform 3 rotates, strong reaction force of the rotary support acts on the rotary platform 3 through the rotary driving device 4 and the shaft sleeve 311, and the shaft sleeve 311 deforms firstly because the hardness of the shaft sleeve 311 is lower than that of the rotary platform 3, so that the rotary platform 3 can be protected.
The herringbone driving gear 47 is arranged at the bottom end of the output shaft 46; the outer circumference of the slewing bearing outer ring 21 is provided with herringbone teeth 211, the herringbone teeth 211 are meshed with the herringbone driving gear 47, and a baffle 49 for resisting the herringbone driving gear 47 is arranged at the bottom end of the transmission shaft 46. The herringbone gear can be regarded as two bevel gears which are symmetrically distributed, so that the herringbone gear can eliminate axial force, and has the advantages of high contact ratio, high bearing capacity and stable work.
A bearing end cap 468 for sealing and fixing the lower tapered roller bearing 467 is provided at the lower end of the lower fixing base 45.
The outer circumference of the upper fixing seat 43 is provided with a flange 411, and the flange 411 is provided with more than two bolt holes 412 uniformly distributed along the circumference. Bolts are inserted through the bolt holes 412 to facilitate the installation and removal of the swing drive 4, and to facilitate maintenance and replacement.
The tripod 6 comprises a first portal 61 and a second portal 62, the first portal 61 comprises a first vertical rod 611, a first diagonal rod 612, a first pulley seat 615 and a first tie rod 613, the top ends of the first pulley seat 615 and the first diagonal rod 612 are welded together, the top ends of the first vertical rod 611 and the first pulley seat 615 are connected through bolts and nuts, a first tie rod 613 is arranged between the first vertical rod 611 and the first diagonal rod 612, the first tie rod 613 comprises a section 613a of the first tie rod, a section 613b of the first tie rod and a section 613c of the first tie rod, one end of the section 613a of the first tie rod is connected with the first vertical rod 611, the other end of the section 613a of the first tie rod is provided with a flange, two ends of the section 613b of the first tie rod are provided with flanges, one end of the section 613c of the first tie rod is connected with one end 613a of the first tie rod, and the other end 613b of the first tie rod is provided with a flange, and the other end 613c of the first tie rod is provided with a flange; the second door frame 62 comprises a second vertical rod 621, a second diagonal rod 622, a second pulley seat 625 and a second tie rod 623, wherein the top ends of the second pulley seat 625 and the second diagonal rod 622 are welded together, the top ends of the second vertical rod 621 and the second pulley seat 625 are connected through bolts and nuts, a second tie rod 623 is arranged between the second vertical rod 621 and the second diagonal rod 622, the second tie rod 623 comprises a second tie rod a section 623a, a second tie rod b section 623b and a second tie rod c section 623c, one end of the second tie rod a section 623a is connected with the second vertical rod 621, the other end of the second tie rod a section 623a is provided with a flange, both ends of the second tie rod b section 623b are provided with a flange, one end of the second tie rod c section 623c is provided with a flange, one end of the second tie rod b section 623b is connected with one end of the flange 623a, and the other end of the second tie rod b section 623b is connected with one end of the second tie rod 623c provided with a flange; a main cross rod 63 is arranged between the first pulley seat 615 and the second pulley seat 625, the main cross rod 63 comprises a main cross rod a section 63a, a main cross rod b section 63b and a main cross rod c section 63c, one end of the main cross rod a section 63a is connected with the first pulley seat 615, the other end of the main cross rod a section 63a is provided with a flange, both ends of the main cross rod b section 63b are provided with flanges, one end of the main cross rod c section 63c is connected with the second pulley seat 625, the other end of the main cross rod c section 63c is provided with a flange, one end of the main cross rod b section 63b is connected with one end of the main cross rod a section 63a provided with a flange, and the other end of the main cross rod b section 63b is connected with one end of the main cross rod c section 63c provided with a flange; more than one third tie rod 64 is arranged between the first diagonal member 612 and the second diagonal member 622, the third tie rod 64 comprises a third tie rod a section 64a, a third tie rod b section 64b and a third tie rod c section 64c, one end of the third tie rod a section 64a is connected with the first diagonal member 612, the other end of the third tie rod a section 64a is provided with a flange, both ends of the third tie rod b section 64b are provided with flanges, one end of the third tie rod c section 64c is connected with the second diagonal member 622, the other end of the third tie rod c section 64c is provided with a flange, one end of the third tie rod b section 64b is connected with one end of the third tie rod a section 64a provided with a flange, and the other end of the third tie rod b section 64b is connected with one end of the third tie rod c section 64c provided with a flange; more than one auxiliary cross bar 65 is arranged between the first vertical bar 611 and the second vertical bar 621.
The first pulley seat 615 and the first vertical rod 611 are fastened through bolts and nuts, and the arrangement can facilitate the disassembly of the first portal 61 and the transportation and the maintenance; when the crane works, the pressure born by the first pulley seat 615 is mainly transmitted to the rotary platform 3 through the first inclined rod 612, so that the strength of connection between the first pulley seat 615 and the first inclined rod 612 can be enhanced through welding connection, the structural stability of the tripod is ensured, the first transverse pull rod 613, the first vertical rod 611 and the first inclined rod 612 can form a triangular structure, the triangular structure is stable, and the stability of the first portal 61 can be effectively enhanced; the second pulley seat 625 and the second vertical rod 621 are fastened through bolts and nuts, and the arrangement can facilitate the disassembly of the second door frame 62 and the transportation and the maintenance; when the crane works, the pressure born by the second pulley seat 625 is mainly transmitted to the rotary platform 3 through the second inclined rod 622, so that the strength of connection between the second pulley seat 625 and the second inclined rod 622 can be enhanced through welding connection, and the structural stability of the tripod is ensured; the second transverse pull rod 623, the second vertical rod 621 and the second diagonal rod 622 can form a triangular structure, the triangular structure is stable, and the stability of the second door frame 62 can be effectively enhanced; a main cross bar 63 is arranged to connect the first portal 61 and the second portal 62, and the main cross bar 63 connects the first portal 61 and the second portal 62 into a whole to improve stability; the third tie rod 64 connects the first diagonal rod 612 and the second diagonal rod 622, which can enhance the stability between the first mast 61 and the second mast 62, prevent the first diagonal rod 612 and the second diagonal rod 622 from being easily bent due to the excessively long length, and further solve the problem that the mounting holes between flanges are misplaced and cannot be smoothly mounted even if the length sizes of the tie rod and the main rail are accurate because the first tie rod 613, the second tie rod 623, the main rail 63 and the third tie rod 64 are all composed of three sections of rods, and because the span length between the first mast and the second mast is too large, if the tie rod and the rail adopt one whole rod, the length sizes of the tie rod and the main rail are erroneous when being mounted.
A first amplitude winch 71 is arranged on the rotary platform 3 at a position close to the first portal 61; a second luffing winch 72 is arranged on the rotary platform 3 at a position close to the second portal 62, a luffing device 8 is arranged at the top end of the suspension arm, a first steel wire rope 91 extends out of the first luffing winch 71, and the first steel wire rope 91 bypasses the first pulley seat 615 to be connected with the luffing device 8; a second wire rope 92 extends out of the second luffing winch 72, and the second wire rope 92 bypasses the second pulley seat 625 and is connected with the luffing device 8. According to the structure, when the boom 5 needs to be luffing, the first luffing winch 71 and the second luffing winch 72 are started, the first steel wire rope 91 and the second steel wire rope 92 can be lengthened or shortened simultaneously, the boom 5 is lifted or lowered through the luffing device 8, and the boom 5 can run stably in the luffing process due to the fact that the first luffing winch 71 and the second luffing winch 72 act simultaneously.
Claims (8)
1. The utility model provides a crane based on flat dysmorphism revolving platform, including base, slewing bearing, revolving platform, rotation drive arrangement, davit and tripod, slewing bearing's outer lane links to each other with the top of base, slewing bearing's inner circle links to each other with revolving platform's bottom, and rotation drive arrangement installs on revolving platform, and the bottom of davit articulates on revolving platform, and the tripod is installed at revolving platform's top, is equipped with the shaft hole that runs through revolving platform on revolving platform, its characterized in that: the rotary platform comprises a bottom plate, a fixed flange, a vertical rod seat, a diagonal rod seat, a suspension arm seat, a top plate and a rib plate group, wherein a chamfer is arranged on one side of the bottom plate, a pile leg penetrating hole is formed in the bottom plate, and the pile leg penetrating hole is arranged close to one side of the chamfer; the fixed flange is arranged on the bottom surface of the bottom plate and is coaxially arranged with the pile leg penetrating holes; the vertical rod seat, the inclined rod seat and the suspension arm seat are all vertically arranged on the top surface of the bottom plate, and the top ends of the vertical rod seat, the inclined rod seat and the suspension arm seat are all provided with hinge holes; the top ends of the vertical rod seat and the inclined rod seat penetrate through the top plate, and hinge holes on the vertical rod seat and the inclined rod seat protrude out of the top plate; the rib plate groups are arranged between the top plate and the bottom plate, each rib plate group comprises a parallel rib plate group and a centering rib plate group, each centering rib plate group comprises a rear centering rib plate group and a front centering rib plate group, the rib plates between the vertical rod seats and the inclined rod seats on the same side are parallel rib plate groups which are arranged in parallel, the rib plates between the opposite vertical rod seats are rear centering rib plate groups which are arranged in a centering way, and the rib plates between the opposite inclined rod seats are front centering rib plate groups which are arranged in a centering way; the top plate is provided with a shaft hole penetrating through the top plate and the bottom plate;
the shaft hole is internally provided with a shaft sleeve, the rotary driving device is arranged in the shaft sleeve and comprises a hydraulic motor, a speed reducer, an upper fixing seat, a connecting sleeve, a lower fixing seat, a transmission shaft and a herringbone driving gear, the upper end of the connecting sleeve is connected with the lower end of the upper fixing seat, the lower end of the connecting sleeve is connected with the upper end of the lower fixing seat, and the transmission shaft is arranged in the connecting sleeve; the speed reducer is arranged at the top end of the upper fixing seat, and an output shaft of the speed reducer is connected with the upper end of the transmission shaft; the hydraulic motor is arranged at the top end of the speed reducer, and an output shaft of the hydraulic motor is connected with an input shaft of the speed reducer; the herringbone driving gear is arranged at the bottom end of the output shaft;
the base comprises a body with an inverted cone-shaped annular structure, the bottom end of the body is small, the top end of the body is large, the base flange is arranged on the top surface of the body and is coaxial with the body, more than two bolt holes are formed in the base flange, more than one reinforcing rib which is uniformly distributed along the circumference of the inner wall is arranged on the inner wall of the body, and more than one reinforcing ring which surrounds the circumference of the inner wall and is connected with each reinforcing rib is arranged on the inner wall of the body;
the tripod comprises a first portal and a second portal, the first portal comprises a first vertical rod, a first diagonal rod, a first pulley seat and a first tie rod, the top ends of the first pulley seat and the first diagonal rod are welded together, the top ends of the first vertical rod and the first pulley seat are connected through bolts and nuts, a first tie rod is arranged between the first vertical rod and the first diagonal rod, the first tie rod comprises a first tie rod a section, a first tie rod b section and a first tie rod c section, one end of the first tie rod a section is connected with the first vertical rod, the other end of the first tie rod a section is provided with a flange, the two ends of the first tie rod b section are respectively provided with a flange, one end of the first tie rod c section is connected with the first diagonal rod, one end of the first tie rod b section is connected with one end of the flange, and the other end of the first tie rod b section is connected with one end of the flange; the second door frame comprises a second vertical rod, a second diagonal rod, a second pulley seat and a second pull rod, the second pulley seat and the second diagonal rod are welded together, the second vertical rod and the second pulley seat are connected through bolts and nuts, a second tie rod is arranged between the second vertical rod and the second diagonal rod, the second tie rod comprises a second tie rod a section, a second tie rod b section and a second tie rod c section, one end of the second tie rod a section is connected with the second vertical rod, the other end of the second tie rod a section is provided with a flange, both ends of the second tie rod b section are provided with flanges, one end of the second tie rod c section is connected with the second diagonal rod, the other end of the second tie rod c section is provided with a flange, one end of the second tie rod b section is connected with one end of the second tie rod a section provided with a flange, and the other end of the second tie rod b section is connected with one end of the second tie rod c section provided with a flange; a main cross rod is arranged between the first pulley seat and the second pulley seat, and comprises a main cross rod a section, a main cross rod b section and a main cross rod c section, wherein one end of the main cross rod a section is connected with the first pulley seat, the other end of the main cross rod a section is provided with a flange, both ends of the main cross rod b section are provided with flanges, one end of the main cross rod c section is connected with the second pulley seat, the other end of the main cross rod c section is provided with a flange, one end of the main cross rod b section is connected with one end of the main cross rod a section provided with a flange, and the other end of the main cross rod b section is connected with one end of the main cross rod c section provided with a flange; more than one auxiliary cross bar is arranged between the first vertical bar and the second vertical bar; the novel horizontal pull rod comprises a first diagonal rod, a second diagonal rod, a third horizontal pull rod c and a third horizontal pull rod c, wherein more than one third horizontal pull rod is arranged between the first diagonal rod and the second diagonal rod, the third horizontal pull rod comprises a third horizontal pull rod a section, a third horizontal pull rod b section and a third horizontal pull rod c section, one end of the third horizontal pull rod a section is connected with the first diagonal rod, flanges are arranged at the two ends of the third horizontal pull rod b section, one end of the third horizontal pull rod c section is connected with the second diagonal rod, flanges are arranged at the other end of the third horizontal pull rod c section, one end of the third horizontal pull rod b section is connected with one end of the third horizontal pull rod a section, and one end of the third horizontal pull rod b section is provided with a flange; a first amplitude winch is arranged at a position, close to the first portal, on the rotary platform; the second derricking winch is arranged at the position of the second portal, the derricking device is arranged at the top end of the boom, a first steel wire rope extends out of the first derricking winch, and the first steel wire rope bypasses the first pulley seat and is connected with the derricking device; a second steel wire rope extends out of the second luffing winch, and the second steel wire rope bypasses the second pulley seat to be connected with the luffing device; more than three fixing holes are uniformly distributed on the fixing flange around the axis of the fixing flange, and counter sunk holes are formed in the upper ends of the fixing holes.
2. The flat profile-based rotary platform crane according to claim 1, wherein: the inner side of the rib plate group is provided with a first transverse rib communicated with each rib plate, and the outer side of the rib plate group is provided with a second transverse rib communicated with each rib plate.
3. The flat profile-based rotary platform crane according to claim 1, wherein: an outer side plate is arranged along the outer contours of the top plate and the bottom plate, the suspension arm seat penetrates through the outer side plate, and the hinge hole on the suspension arm seat protrudes out of the outer side plate; an inner side plate is arranged between the top plate and the bottom plate along the edge of the pile leg penetrating hole.
4. The flat profile-based rotary platform crane according to claim 1, wherein: the number of the shaft holes is three, the shaft holes are distributed on the circumference taking the axle center of the pile leg penetrating hole as the center, and the intervals between the adjacent shaft holes are equal.
5. The flat profile-based rotary platform crane according to claim 1, wherein: and reinforcing rings are arranged at two ends of the hinge holes on the vertical rod seat, the inclined rod seat and the suspension arm seat.
6. The flat profile-based rotary platform crane according to claim 1, wherein: the outer circumference of the slewing bearing outer ring is provided with herringbone teeth which are meshed with the herringbone driving gear; the bottom end of the transmission shaft is provided with a baffle plate for resisting the herringbone driving gear.
7. The flat profile-based rotary platform crane according to claim 1, wherein: the upper end of the connecting sleeve is connected with the lower end of the upper fixing seat in a welding mode; the lower end of the connecting sleeve is connected with the upper end of the lower fixing seat in a welding mode.
8. The flat profile-based rotary platform crane according to claim 1, wherein: a tapered roller bearing is arranged between the transmission shaft and the upper fixing seat; a tapered roller bearing is arranged between the transmission shaft and the lower fixing seat; the lower end of the lower fixing seat is provided with a bearing end cover for sealing and fixing a lower end bearing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811120537.6A CN109132883B (en) | 2018-09-26 | 2018-09-26 | Crane based on flat special-shaped rotary platform |
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| CN201811120537.6A CN109132883B (en) | 2018-09-26 | 2018-09-26 | Crane based on flat special-shaped rotary platform |
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| CN109132883B true CN109132883B (en) | 2023-07-21 |
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| CN111115466B (en) * | 2019-12-12 | 2021-05-07 | 江苏鹤钢重工有限公司 | Crane convenient to keep focus |
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| CN109132883A (en) | 2019-01-04 |
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