CN112227221B - Rear supporting leg device of bridge girder erection machine - Google Patents
Rear supporting leg device of bridge girder erection machine Download PDFInfo
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- CN112227221B CN112227221B CN202011228927.2A CN202011228927A CN112227221B CN 112227221 B CN112227221 B CN 112227221B CN 202011228927 A CN202011228927 A CN 202011228927A CN 112227221 B CN112227221 B CN 112227221B
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- support leg
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- 230000005540 biological transmission Effects 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
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- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/06—Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a rear supporting leg device of a bridge girder erection machine, which comprises a rear supporting leg beam, wherein a bottom rotary supporting frame is fixed on the bottom surface of the rear supporting leg beam, a rear supporting leg beam pulley block is arranged on the rear supporting leg beam, a rear supporting leg balancing seat is fixedly connected to a top plate of the rear supporting leg beam pulley block through bolts, and an inner sleeve connecting seat is hinged to the rear supporting leg balancing seat through a balancing shaft; the rear support leg movable change gear is adopted to move along the girder of the bridge girder erection machine, the friction force is small, the effect is good, the bottom rotary support frame can be adjusted to be positioned at the bottom surface of the rear support leg cross beam according to the requirement, the bottom rotary support frame can be ensured to be positioned right above two side wall parts of the box girder, the rear support leg cross beam pulley blocks of the two rear support legs are positioned on the rear support leg cross beam, the distance between the rear support leg cross beam pulley blocks of the two rear support legs can be adjusted and increased, the distance between the two rear support legs can be ensured to be suitable for the box girder connecting block to pass through, the requirement of stress and passing is met, and the effect is good.
Description
Technical field:
The invention relates to the technical field of road bridge equipment, in particular to a rear supporting leg device of a bridge girder erection machine.
The background technology is as follows:
in the existing bridge girder erection machine, the rear supporting leg device moves along the top surface of the side part of the main girder through the polytetrafluoroethylene plate when moving along the main girder, so that the friction force is large, the movement and adjustment are not easy, and the effect is poor;
meanwhile, the bottom of the rear supporting leg device is generally directly and rigidly connected with the bottom rotary supporting frame, the bottom surface of the rear supporting leg of the bottom rotary supporting frame needs to be pressed against the stressed position of the top surface of the box girder of the bridge, namely the top surface of the box girder above the two side wall parts of the box girder, and the middle part of the bridge girder erection machine needs to be ensured to be capable of passing through the box girder connecting block, so that the distance between the two rear supporting legs of the bridge girder erection machine needs to be large enough, and when the distance between the two rear supporting legs is larger than the distance between the two side wall parts of the box girder, the bottom of the rear supporting leg directly presses against the two wing plates at the top of the box girder, and at the moment, the wing plates cannot be stressed completely, so that the wing plates are damaged and the effect is poor.
The invention comprises the following steps:
The invention aims at overcoming the defects of the prior art, and provides a rear supporting leg device of a bridge girder erection machine, which adopts a rear supporting leg moving change gear to move along a girder of the bridge girder erection machine, has small friction force and good effect, can adjust the bottom rotary supporting frame to be positioned at the bottom surface of a rear supporting leg cross beam according to requirements, ensures that the bottom rotary supporting frame can be positioned right above two side wall parts of a box girder, ensures that rear supporting leg cross beam pulley blocks of two rear supporting legs are positioned on the rear supporting leg cross beam, can adjust and enlarge the interval between the rear supporting leg cross beam pulley blocks of the two rear supporting legs, can ensure that the distance between the two rear supporting legs is suitable for the passing of the box girder connecting block, and meets the requirements of stress and passing, and has good effect.
The technical solution of the invention is as follows:
The rear supporting leg device of the bridge girder erection machine comprises a rear supporting leg cross beam, wherein a plurality of bottom rotary supporting frames are fixed on the bottom surface of the rear supporting leg cross beam, a rear supporting leg cross beam pulley block is arranged on the rear supporting leg cross beam, a rear supporting leg balancing seat is fixedly connected to a top plate of the rear supporting leg cross beam pulley block through bolts, an inner sleeve connecting seat is hinged to the rear supporting leg balancing seat through a balancing shaft, an inner sleeve is fixed to the top surface of the inner sleeve connecting seat, the upper portion of the inner sleeve is inserted into an outer sleeve, two inclined supporting arms at the bottom of the rear supporting leg cross beam are fixed to two outer side walls of the outer sleeve, a rear supporting leg main oil cylinder is hinged to the middle part of the bottom surface of a horizontal beam of the rear supporting leg cross beam, a lower connecting seat is fixed to the top surface of the inner sleeve connecting seat, and the bottom end of a push rod of the rear supporting leg main oil cylinder is hinged to the lower connecting seat through a hinge shaft;
The left part and the right part of the top surface of the horizontal beam of the rear support leg support frame are respectively fixed with a rear support leg side support frame, the middle part of the outer side wall of the rear support leg side support frame is fixed with a rear support leg moving gear motor, an output shaft of the rear support leg moving gear motor penetrates through the rear support leg side support frame and is fixed with a rear support leg moving driving gear, a rear support leg moving change gear is hinged on the rear support leg side support frame through a bearing, and a rear support leg driving gear is fixed at the inner end part of the rear support leg moving change gear and meshed with the rear support leg moving driving gear.
The bottom rotating support frame comprises a rear support leg bottom rotating support frame, the rear support leg bottom rotating support frame is fixedly connected to the bottom surface of the rear support leg cross beam through bolts, a rear support leg bottom adjusting block is fixed to the bottom surface of the rear support leg bottom rotating support frame, and a screw rod portion of the rear support leg is in threaded connection with a middle portion of the rear support leg bottom adjusting block.
The rear support leg beam pulley block comprises a rear support leg lower pulley seat, a plurality of lower support plates fixed on the bottom side of the rear support leg lower pulley seat are hinged with rear support leg idler wheels through bearings, and the top surfaces of the rear support leg idler wheels are spaced from the bottom surface of the top plate side of the rear support leg beam.
The bottom surface of the rear landing leg lower pulley seat is pressed against the top surface of the top plate of the rear landing leg cross beam, the middle part of the top plate of the rear landing leg cross beam is provided with a rear landing leg upper moving through groove, the bottom plate of the rear landing leg lower pulley seat is fixedly connected with a rear landing leg positioning pressing plate through a bolt, the bolt of the rear landing leg positioning pressing plate is inserted into the rear landing leg upper moving through groove, and the top surface of the rear landing leg positioning pressing plate is close to the bottom surface of the top plate of the rear landing leg cross beam.
The side part of the top plate of the rear support leg lower pulley seat is provided with a plurality of rear support leg side arc through grooves, and bolts connected between the rear support leg balancing seat and the top plate of the rear support leg lower pulley seat are inserted into the rear support leg side arc through grooves;
The bottom plate of the rear supporting leg balancing seat is hinged with the middle part of the top plate of the rear supporting leg lower pulley seat through a hinge shaft.
A plurality of vertically arranged connecting through holes are formed in the two side walls of the inner sleeve body, a plurality of vertically arranged external connecting through holes are formed in the corresponding two side walls of the outer sleeve body, and the rear supporting leg pin shafts are inserted into the corresponding connecting through holes and the external connecting through holes.
The side walls of the rear supporting leg side supporting frames are hinged with guide wheels through hinge shafts, the girder of the bridge girder erection machine is placed above the horizontal beams of the rear supporting leg supporting frames, and the side edges of the bottom plates of the girder of the bridge girder erection machine are close to the side walls of the corresponding guide wheels.
The bottom surface of the rear supporting leg movable change gear is positioned at the top surface of the top plate edge of the bottom beam of the girder of the bridge girder erection machine.
The top surface of the top plate edge of the bottom beam of the girder bridge girder erection machine is fixedly provided with a wear-resistant guide strip, and the bottom surface of the rear supporting leg movable change gear is close to the top surface of the corresponding wear-resistant guide strip.
A plurality of rear leg beam reinforcing blocks with I-shaped sections are arranged between the two main transverse plates in the middle of the rear leg beam, and two ends of each rear leg beam reinforcing block are welded and fixed on the inner side walls of the two main transverse plates.
The invention has the beneficial effects that:
1. The rear supporting leg movable change gear is adopted to move along the girder of the bridge girder erection machine, the friction force is small, the effect is good,
2. The bottom rotary support frame can be adjusted to be located at the bottom surface position of the rear support leg beam according to needs, the bottom rotary support frame can be located right above two side wall parts of the box girder, the rear support leg beam pulley blocks of the two rear support legs are located on the rear support leg beam, the distance between the rear support leg beam pulley blocks of the two rear support legs can be adjusted and increased, the distance between the two rear support legs can be guaranteed to be suitable for the box girder connecting blocks to pass through, the requirements of stress and passing through are met, and the effect is good.
3. The rear support beam pulley block and the inner sleeve body of the rear support are flexibly connected through the rear support balancing seat, the rear support beam can incline to a certain extent when placed, the inner sleeve body needs to be in a vertical state, meanwhile, the bottom surface of the rear support beam pulley block needs to be guaranteed to be attached to and pressed against the top surface of the rear support beam, the bottom surface of the rear support beam pulley block can be attached to and pressed against the top surface of the rear support beam through the rear support beam pulley block by the rear support balancing seat along a balancing shaft in a rotary movement angle, meanwhile, the inner sleeve body is in a vertical state, and the bottom surface of the rear support beam pulley block is balanced with the rear support beam in stress.
Description of the drawings:
FIG. 1 is a schematic view of a partial structure between the present invention and a girder of a bridge girder erection machine;
FIG. 2 is a schematic view of a partial structure of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 1;
FIG. 4 is a schematic view of a partial structure of the angle change of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 4;
fig. 6 is a partial cross-sectional view of the rear leg lower pulley mount.
The specific embodiment is as follows:
Examples: referring to fig. 1 to 6, a rear leg device of a bridge girder erection machine comprises a rear leg beam 20, wherein a plurality of bottom rotary supporting frames 21 are fixed on the bottom surface of the rear leg beam 20, a rear leg beam pulley block 22 is mounted on the rear leg beam 20, a rear leg equalizing seat 23 is fixedly connected to a top plate of the rear leg beam pulley block 22 through bolts, an inner sleeve connecting seat 24 is hinged to the rear leg equalizing seat 23 through an equalizing shaft, an inner sleeve body 25 is fixed to the top surface of the inner sleeve connecting seat 24, the upper part of the inner sleeve body 25 is inserted and sleeved in an outer sleeve body 26, two inclined supporting arms 271 at the bottom of the rear leg supporting frame 27 are fixed to two outer side walls of the outer sleeve body 26, a rear leg main cylinder 272 is hinged to the middle part of the bottom surface of a horizontal beam of the rear leg supporting frame 27, a lower connecting seat is fixed to the top surface of the inner sleeve connecting seat 24, and the bottom end of a push rod of the rear leg main cylinder 272 is hinged to the lower connecting seat through a hinge shaft, and the inner sleeve body 25 and the outer sleeve body 26 are fixedly connected through a plurality of rear leg pin shafts 201;
The left and right parts of the top surface of the horizontal beam of the rear support leg supporting frame 27 are respectively fixed with a rear support leg side supporting frame 273, the middle part of the outer side wall of the rear support leg side supporting frame 273 is fixed with a rear support leg moving speed reducing motor 274, an output shaft of the rear support leg moving speed reducing motor 274 penetrates through the rear support leg side supporting frame 273 and is fixed with a rear support leg moving driving gear 275, the rear support leg side supporting frame 273 is hinged with a rear support leg moving change gear 276 through a bearing, the inner end part of the rear support leg moving change gear 276 is fixed with a rear support leg driving gear 277, and the rear support leg driving gear 277 is meshed with the rear support leg moving driving gear 275.
Further, the bottom rotating support frame 21 includes a rear leg bottom rotating support frame 211, the rear leg bottom rotating support frame 211 is fixedly connected to the bottom surface of the rear leg cross beam 20 through bolts, a rear leg bottom adjusting block is fixed to the bottom surface of the rear leg bottom rotating support frame 211, and a screw portion of the rear support leg 212 is screwed into a middle screw hole of the rear leg bottom adjusting block.
Further, the rear leg beam pulley block 22 includes a rear leg lower pulley seat 221, a plurality of lower support plates fixed to the bottom edge of the rear leg lower pulley seat 221 are hinged with rear leg rollers 222 through bearings, and the top surface of the rear leg rollers 222 is spaced from the bottom surface of the top plate edge of the rear leg beam 20.
Further, the bottom surface of the lower pulley seat 221 of the rear leg is pressed against the top surface of the top plate of the rear leg cross beam 20, the middle part of the top plate of the rear leg cross beam 20 is provided with an upper moving through groove 202 of the rear leg, the bottom plate of the lower pulley seat 221 of the rear leg is fixedly connected with a positioning pressure plate 229 of the rear leg through bolts, the bolts of the positioning pressure plate 229 of the rear leg are inserted into the upper moving through groove 202 of the rear leg, and the top surface of the positioning pressure plate 229 of the rear leg is close to the bottom surface of the top plate of the rear leg cross beam 20.
Further, a plurality of rear leg side arc through grooves 223 are formed at the side of the top plate of the rear leg lower pulley seat 221, and bolts connected between the rear leg equalizing seat 23 and the top plate of the rear leg lower pulley seat 221 are inserted into the rear leg side arc through grooves 223;
The bottom plate of the rear leg balancing seat 23 is hinged with the middle part of the top plate of the rear leg lower pulley seat 221 through a hinge shaft.
Further, a plurality of vertically arranged connecting through holes are formed on two side walls of the inner sleeve 25, a plurality of vertically arranged external connecting through holes are formed on two corresponding side walls of the outer sleeve 26, and the rear leg pin 201 is inserted into the corresponding connecting through holes and the external connecting through holes.
Further, the inner side walls of the rear leg side supporting frames 273 are hinged with guide wheels 278 through hinge shafts, and the girder bridge girder 1000 is placed above the horizontal beams of the rear leg supporting frames 273, and the side edges of the bottom beams of the girder bridge girder 1000 are close to the side walls of the corresponding guide wheels 278.
Further, the bottom surface of the rear leg movable change gear 276 is located at the top surface of the top plate edge of the bottom beam of the main girder 1000 of the bridge girder erection machine.
Further, the top surface of the top plate edge of the bottom beam of the girder 1000 of the bridge girder erection machine is fixed with a wear-resistant guiding strip 1001, and the bottom surface of the rear leg moving change gear 276 is close to the top surface of the corresponding wear-resistant guiding strip 1001.
Further, a plurality of rear leg beam reinforcing blocks 28 with i-shaped sections are arranged between the two main transverse plates at the middle part of the rear leg beam 20, and two ends of the plurality of rear leg beam reinforcing blocks 28 are welded and fixed on the inner side walls of the two main transverse plates.
Working principle: in use, the present embodiment is hung on the bridge girder 1000 by the rear leg moving change gear 276, when the rear leg needs to be supported, the bottom surface of the rear support leg 212 is pressed against the top surface directly above the side wall portion of the box girder of the bridge body by pushing the push rod of the rear leg main cylinder 272, the height of the bottom surface of the rear support leg 212 can be adjusted by rotating the screw rod portion of the rear support leg 212, wherein after pushing the push rod of the rear leg main cylinder 272, the bottom surface of the rear leg lower pulley seat 221 is pressed against the top surface of the top plate of the rear leg girder 20, then, the nut screwed on the bolt at the rear leg positioning pressure plate 229 is rotated, the top surface of the rear leg positioning pressure plate 229 is pressed against the top plate bottom surface of the rear leg girder 20, and fixing is achieved, wherein when the bottom surface of the rear leg lower pulley seat 221 is pressed against the top surface of the top plate of the rear leg girder 20, the bottom surface of the rear leg girder 25 is pressed against the top plate of the rear leg girder 20 by the hinging action (flexible connection) of the equalizing shaft of the rear leg equalizing seat 23, and the relative rotation adjustment of the rear leg lower pulley seat 221 and the inner sleeve connecting seat 24 can be ensured, and then, the top surface of the rear leg 20 is pressed against the top surface of the rear leg girder 20 is balanced.
When the two rear leg beam pulley blocks 22 in the embodiment need to move, namely, when the two rear legs (the rear legs are composed of the rear leg beam pulley blocks 22, the rear leg equalizing seat 23, the inner sleeve connecting seat 24, the inner sleeve 25, the outer sleeve 26, the rear leg supporting frame 27 and other parts) need to move, nuts screwed on bolts at the positions of the rear leg positioning press plates 229 can be unscrewed, nuts of the bolts connected between the rear leg equalizing seat 23 and the top plate of the rear leg lower pulley seat 221 can be unscrewed, the push rod of the rear leg main oil cylinder 272 is retracted, at this time, the top plate edge of the rear leg beam 20 is pressed against the top surface of the rear leg roller 222, so that the rear leg beam pulley block 22 can move along the rear leg beam 20, meanwhile, the nuts of the bolts connected between the rear leg equalizing seat 23 and the top plate of the rear leg lower pulley seat 221 are unscrewed, a plurality of arc-shaped through grooves 223 at the edge parts of the top plate of the rear leg lower pulley seat 221 can realize that the rear leg equalizing seat 23 horizontally rotates along the top plate of the rear leg lower pulley seat 221 by a certain angle, and the arc-shaped top plate of the rear leg device can not move along the arc-shaped line of the rear leg body; meanwhile, as the push rod of the rear support leg main oil cylinder 272 is retracted, the bottom surface of the rear support leg moving change gear 276 is clung to the top surface of the wear-resistant guide strip 1001, the bottom plate of the bottom beam of the bridge girder erection machine main beam 1000 is not pressed against the upper part of the horizontal beam of the rear support leg supporting frame 273 any more, then, the rear support leg can be moved and conveyed along the bridge girder erection machine main beam 1000 by the operation of the rear support leg moving speed reducing motor 274, the rear support leg moving change gear 276 is adopted for rolling movement, the friction force is small, and the movement is convenient.
Meanwhile, when all the guide wheels 278 can ensure that the rear support leg moving change wheels 276 move along the top surfaces of the wear-resistant guide strips 1001, the bridge girder erection machine 1000 is ensured to be positioned between all the guide wheels 278, so that excessive deviation between the position of the rear support leg support frame 27 and the bridge girder machine 1000 can not be generated when the rear support leg support frame 27 moves, and when the rear support leg moving change wheels 276 move, the bottom surfaces of the rear support leg moving change wheels 276 always press against the top surfaces of the wear-resistant guide strips 1001 to move.
In this embodiment, four bottom rotating support frames 21 are fixed on the bottom surface of the rear leg cross beam 20, the rear leg bottom rotating support frames 211 of the four bottom rotating support frames 21 are fixedly connected to the bottom surface of the rear leg cross beam 20 through bolts, a plurality of connecting screw holes are formed in the bottom surface of the rear leg cross beam 20, and the rear leg bottom rotating support frames 211 are installed in the corresponding connecting screw holes according to requirements, so that the positions of the bottom rotating support frames 21 on the bottom surface of the rear leg cross beam 20 are changed according to requirements, and different installation requirements are met.
Claims (6)
1. Rear landing leg device of bridge girder erection machine, including rear landing leg crossbeam (20), its characterized in that: the bottom surface of the rear support leg cross beam (20) is fixedly provided with a plurality of bottom rotary support frames (21), the rear support leg cross beam (20) is provided with a rear support leg cross beam pulley block (22), a top plate of the rear support leg cross beam pulley block (22) is fixedly connected with a rear support leg balancing seat (23) through bolts, the rear support leg balancing seat (23) is hinged with an inner sleeve connecting seat (24) through a balancing shaft, the top surface of the inner sleeve connecting seat (24) is fixedly provided with an inner sleeve body (25), the upper part of the inner sleeve body (25) is inserted and sleeved in an outer sleeve body (26), two inclined support arms (271) at the bottom of the rear support leg support frame (27) are fixed on two outer side walls of the outer sleeve body (26), the middle part of the bottom surface of a horizontal beam of the rear support leg support frame (27) is hinged with a rear support leg main oil cylinder (272), the top surface of the inner sleeve body connecting seat (24) is fixedly provided with a lower connecting seat, the bottom end of a push rod of the rear support leg main oil cylinder (272) is hinged on the lower connecting seat through a hinging shaft, and the inner sleeve body (25) and the outer sleeve body (26) are fixedly connected through a plurality of rear support pins (201);
Rear support leg side supporting frames (273) are fixed on the left part and the right part of the top surface of the horizontal beam of the rear support leg supporting frame (27), a rear support leg moving speed reducing motor (274) is fixed in the middle of the outer side wall of the rear support leg side supporting frames (273), an output shaft of the rear support leg moving speed reducing motor (274) penetrates through the rear support leg side supporting frames (273) and is fixedly provided with a rear support leg moving driving gear (275), rear support leg moving change gears (276) are hinged on the rear support leg side supporting frames (273) through bearings, rear support leg transmission gears (277) are fixed at the inner end parts of the rear support leg moving change gears (276), and the rear support leg transmission gears (277) are meshed with the rear support leg moving driving gears (275);
The bottom rotary support frame (21) comprises a rear support leg bottom rotary support frame (211), the rear support leg bottom rotary support frame (211) is fixedly connected to the bottom surface of the rear support leg cross beam (20) through bolts, a rear support leg bottom adjusting block is fixed to the bottom surface of the rear support leg bottom rotary support frame (211), and a screw rod part of a rear support leg (212) is in threaded connection with a middle threaded hole of the rear support leg bottom adjusting block;
The rear support leg beam pulley block (22) comprises a rear support leg lower pulley seat (221), a plurality of lower support plates fixed on the bottom surface edge of the rear support leg lower pulley seat (221) are hinged with rear support leg rollers (222) through bearings, and the top surface of each rear support leg roller (222) is spaced from the bottom surface of the top plate edge of the rear support leg beam (20);
The bottom surface of the rear support leg lower pulley seat (221) is pressed against the top surface of the top plate of the rear support leg cross beam (20), the middle part of the top plate of the rear support leg cross beam (20) is provided with a rear support leg upper moving through groove (202), the bottom plate of the rear support leg lower pulley seat (221) is fixedly connected with a rear support leg positioning pressing plate (229) through bolts, the bolts of the rear support leg positioning pressing plate (229) are inserted into the rear support leg upper moving through groove (202), and the top surface of the rear support leg positioning pressing plate (229) is close to the bottom surface of the top plate of the rear support leg cross beam (20);
A plurality of rear leg edge arc through grooves (223) are formed at the edge of the top plate of the rear leg lower pulley seat (221), and bolts connected between the rear leg balancing seat (23) and the top plate of the rear leg lower pulley seat (221) are inserted into the rear leg edge arc through grooves (223);
the bottom plate of the rear supporting leg balancing seat (23) is hinged with the middle part of the top plate of the rear supporting leg lower pulley seat (221) through a hinge shaft.
2. The rear leg assembly of a bridge girder erection machine according to claim 1, wherein: a plurality of vertically arranged connecting through holes are formed in two side walls of the inner sleeve body (25), a plurality of vertically arranged external connecting through holes are formed in two corresponding side walls of the outer sleeve body (26), and the rear supporting leg pin shafts (201) are inserted into the corresponding connecting through holes and the external connecting through holes.
3. The rear leg assembly of a bridge girder erection machine according to claim 1, wherein: the inner side walls of the rear supporting leg side supporting frames (273) are hinged with guide wheels (278) through hinge shafts, a bridge girder erection machine main beam (1000) is placed above the horizontal beams of the rear supporting leg side supporting frames (273), and the side edges of the bottom plates of the bottom beams of the bridge girder erection machine main beam (1000) are close to the side walls of the corresponding guide wheels (278).
4. A rear leg arrangement of a bridge girder erection machine as claimed in claim 3, wherein: the bottom surface of the rear supporting leg movable change gear (276) is positioned at the top surface of the top plate edge of the bottom beam of the main beam (1000) of the bridge girder erection machine.
5. The rear leg assembly of a bridge girder erection machine as claimed in claim 4, wherein: the top surface of the top plate edge of the bottom beam of the girder (1000) of the bridge girder erection machine is fixedly provided with a wear-resistant guide strip (1001), and the bottom surface of the rear supporting leg movable change gear (276) is close to the top surface of the corresponding wear-resistant guide strip (1001).
6. The rear leg assembly of a bridge girder erection machine according to claim 1, wherein: a plurality of rear leg beam reinforcing blocks (28) with I-shaped sections are arranged between the two main transverse plates at the middle part of the rear leg beam (20), and two ends of each rear leg beam reinforcing block (28) are welded and fixed on the inner side walls of the two main transverse plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011228927.2A CN112227221B (en) | 2020-11-06 | 2020-11-06 | Rear supporting leg device of bridge girder erection machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011228927.2A CN112227221B (en) | 2020-11-06 | 2020-11-06 | Rear supporting leg device of bridge girder erection machine |
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| CN112227221A CN112227221A (en) | 2021-01-15 |
| CN112227221B true CN112227221B (en) | 2024-05-10 |
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| CN202011228927.2A Active CN112227221B (en) | 2020-11-06 | 2020-11-06 | Rear supporting leg device of bridge girder erection machine |
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| CN112962459B (en) * | 2021-02-05 | 2022-12-09 | 武汉通联路桥机械技术有限公司 | Integrated bridge girder erection machine for piling, pier mounting and girder erection and bridge construction method |
| CN113651248B (en) * | 2021-06-28 | 2023-11-24 | 中铁第五勘察设计院集团有限公司 | Moving device of cable crane |
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