CN215758566U

CN215758566U - Rear supporting leg mechanism of railway bridge girder erection machine

Info

Publication number: CN215758566U
Application number: CN202122231816.3U
Authority: CN
Inventors: 冷志坚; 戴志兵; 钟竹平; 农方涛; 毋文涛; 安进祥
Original assignee: CCCC Second Harbor Engineering Co
Current assignee: CCCC Second Harbor Engineering Co
Priority date: 2021-09-15
Filing date: 2021-09-15
Publication date: 2022-02-08
Anticipated expiration: 2031-09-15

Abstract

The utility model discloses a rear support leg mechanism of a railway bridge girder erection machine, which comprises an O-shaped main body, wherein two ends of a lower cross beam of the O-shaped main body are symmetrically provided with a supporting assembly and a walking assembly, the supporting assembly comprises a jacking oil cylinder for vertically supporting the lower cross beam, the walking assembly is arranged on the outer side of the supporting assembly and comprises a bracket and a walking wheel box which are symmetrically arranged on two sides of the lower cross beam, the walking wheel box is fixed at the bottom of the bracket, and a spherical hinged support is arranged between the walking wheel box and the bracket. Through overlapping supporting component, walking subassembly and bottom end rail side by side at vertical direction, save vertical height space greatly, reduced the height that back landing leg bottom end rail upper cover plate leaves ground, structural arrangement is reasonable to the feed beam height of bridge girder erection machine and fortune roof beam car has effectively been reduced. In addition, the upper parts of the walking wheel boxes are connected with the brackets through spherical hinged supports, so that the walking wheels have stronger adaptability to beam surface flatness, bridge surface curves and longitudinal and transverse slopes, and the walking safety is further improved.

Description

Rear supporting leg mechanism of railway bridge girder erection machine

Technical Field

The utility model relates to the technical field of railway bridge construction equipment, in particular to a rear support leg mechanism of a railway bridge girder erection machine.

Background

The rear supporting leg of the railway bridge girder erection machine is a main bearing supporting leg of the bridge girder erection machine and a driving supporting leg which walks across the bridge girder erection machine, a rear supporting leg walking mechanism and a jacking mechanism of the existing railway bridge girder erection machine are arranged on the lower part of a bottom plate of a lower cross beam of an O-shaped leg side by side, an oil cylinder shrinks and walks on a track during walking, the rear supporting leg walking wheel drives the whole machine to walk across the bridge girder forward, and the walking track is carried manually or is dragged by a simple tool. The structural form of the rear support leg of the existing bridge girder erection machine is analyzed to find that the following defects generally exist:

1) the structural form of the rear support leg of the existing bridge girder erection machine is difficult to meet the transportation requirement of a 40m/1000t box girder, and a travelling wheel is arranged below a lower cross beam of an O-shaped leg, so that the travelling wheel is greatly higher than the feeding height requirement of a 40m/1000t tunnel-passing girder transportation vehicle and is difficult to pass through a tunnel;

2) the pressure of the travelling wheel of the rear supporting leg is large, the travelling wheel box is rigidly connected with the rear supporting leg, the adaptability to the unevenness and the longitudinal and transverse gradients of the bridge deck is poor, the track stroke of one side is often subjected to unbalance loading, and the phenomenon of rail breaking is sometimes caused;

3) the walking track is dragged by a worker through a simple steel wire rope dragging tool, the labor intensity of the worker is high, and the accident that the steel wire rope is broken to hurt people happens occasionally.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a rear support leg mechanism of a railway bridge girder erection machine, which effectively reduces the design height of the bridge girder erection machine, meets the requirement of a girder transporting vehicle on passing a tunnel, improves the adaptability of wheels to a track and improves the safety of rear support leg walking.

In order to solve the technical problem, the rear support leg mechanism of the railway bridge girder erection machine comprises an O-shaped main body, wherein a supporting assembly and a walking assembly are symmetrically arranged at two ends of a lower cross beam of the O-shaped main body, the supporting assembly comprises a jacking oil cylinder for vertically supporting the lower cross beam and an arc-shaped base plate fixed at the bottom end of the jacking oil cylinder, the walking assembly is arranged at the outer side of the supporting assembly and comprises a bracket and a walking wheel box which are symmetrically arranged at two sides of the lower cross beam, the walking wheel box is fixed at the bottom of the bracket, and a spherical hinge support is arranged between the walking wheel box and the bracket.

In above-mentioned back landing leg mechanism, through fixing jacking cylinder inside the bottom end rail, pass through bracket structure symmetry with the walking wheelhouse and fix in the front of bottom end rail, the back, in vertical direction, utilize supporting component, walking component and bottom end rail overlap arrangement side by side, save vertical height space greatly, the height that has reduced back landing leg bottom end rail upper cover plate and leaves ground, the structural arrangement is reasonable, thereby effectively reduced the height of feeding the roof beam of bridge girder erection machine and fortune roof beam car, can satisfy the low-order fortune roof beam car and feed the roof beam demand, be favorable to bridge girder erection machine to carry and cross the tunnel, especially the fortune frame equipment to 40m 1000t case roof beam. In addition, the upper part of the walking wheel box is connected with the bracket through the spherical hinged support, and the walking wheel box and the bracket are allowed to have a certain inclination angle, so that the walking wheel has stronger adaptability to beam surface flatness, bridge surface curves and longitudinal and transverse slopes, and the walking safety is further improved.

As an improvement of the rear leg supporting mechanism, the walking assembly further comprises a walking track and a driving mechanism for driving the walking track to slide, a support is arranged at the end of the bracket in an extending mode, a hanging seat is arranged at the bottom of the support and is vertically arranged, the bottom end of the hanging seat is embedded with the walking track to be in sliding hanging connection, and the walking track is in sliding contact with the bottoms of the wheels of the walking wheel boxes. Through the support with hang the seat, hang the walking track level in the bottom of walking wheel case, when needs remove whole back landing leg, lift up automatically earlier and remove the walking track, put down the walking track again, utilize the walking wheel case to take the back landing leg to remove on the walking track, need not artificial transport or dilatory track, the walking is efficient, effectively reduces workman intensity of labour, can also avoid in addition because the wounded occurence of failure of dragging track wire rope breakage, improves the security that the bridge crane crossed the walking.

As a further improvement of the rear supporting leg mechanism, the driving mechanism comprises a winch and a steel wire rope, the winch is fixed on the upper cover plate of the lower cross beam, the middle part of the steel wire rope is wound on the winch, and two ends of the steel wire rope are respectively led out to be fixedly connected with two ends of the walking track. The steel wire ropes are respectively pulled out and pulled at the two ends of the walking track through the winch, so that the walking track can automatically translate, the supporting action of the jacking oil cylinder is matched, the automatic walking of the rear supporting legs of the bridge girder erection machine is ingeniously realized, and the automation degree and the efficiency are high.

In conclusion, the rear supporting leg mechanism is reasonable in structural arrangement, the beam feeding heights of the bridge girder erection machine and the beam transporting vehicle are effectively reduced, the requirements of a low-position beam transporting vehicle are met, and the rear supporting leg mechanism is beneficial to passing through a tunnel; the traveling wheels have stronger adaptability to the bridge curve and the longitudinal and transverse slopes, and the wheel pressure is small and the stress is uniform; the rear supporting legs are provided with the rails to automatically walk, so that the degree of automation of walking and crossing is high, the efficiency is high, and the walking safety is good.

Drawings

In the drawings:

fig. 1 is a front view of the rear leg of the present invention.

Fig. 2 is a side view of the rear leg of the present invention.

FIG. 3 is a schematic sectional view of A-A in FIG. 2.

In the figure, 1, a lower cross beam; 2. a jacking oil cylinder; 3. an arc-shaped base plate; 4. a bracket; 5. a traveling wheel box; 6. a spherical hinged support; 7. a traveling rail; 8. a support; 9. hanging a seat; 10. a tetrafluoro plate; 11. a winch; 12. a wire rope; 13. a rope end fixing seat; 14. rope clips; 15. an upper guide wheel; 16. a lower guide wheel; 17. a tensioning mechanism.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto.

Further, it should be noted that as used in the following description, the terms "front," "back," "left," "right," "top," "bottom," "upper" and "lower" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

As shown in figure 1, the rear support leg mechanism of the railway bridge girder erection machine comprises an O-shaped main body, wherein a supporting assembly and a walking assembly are symmetrically arranged at two ends of a lower cross beam 1 of the O-shaped main body, the supporting assembly comprises a jacking oil cylinder 2 for vertically supporting the lower cross beam 1 and an arc-shaped base plate 3 fixed at the bottom end of the jacking oil cylinder 2, the walking assembly is arranged at the outer side of the supporting assembly and comprises a bracket 4 and a walking wheel box 5 which are symmetrically arranged at two sides of the lower cross beam 1, the walking wheel box 5 is fixed at the bottom of the bracket 4, and a spherical hinge support 6 is arranged between the walking wheel box 5 and the bracket 4.

During the use, at the inside built-in flange of bottom end rail 1, with the upper portion fixed connection of jacking cylinder 2, the piston rod bottom of jacking cylinder 2 supports subaerial through arc backing plate 3, and the whole O type main part of support that can relax has reduced the required support height of supporting component. Through preceding, the symmetrical level welding box bracket 4 structure in back of lower beam 1, install walking wheel case 5 in the bottom of bracket 4, have overlap portion with lower beam 1 in vertical direction, reduce the required support height of walking subassembly, effectively reduced the height that the upper cover plate of rear leg lower beam 1 leaves the ground. In addition, the walking wheels and the jacking oil cylinders 2 are arranged in a staggered mode, and oil cylinder pipelines can be arranged and maintained more conveniently. Two groups of walking wheels are arranged in front of and behind the lower cross beam 1, so that the track wheel pressure can be obviously reduced, and the walking safety and stability are improved.

The upper part of the walking wheel box 5 is connected with the bracket 4 through a spherical hinged support 6, and the spherical hinged support 6 means that the support does not allow displacement in any direction, but allows a certain rotation angle in any direction. When walking, the walking wheels have stronger adaptability to beam surface flatness, total transverse gradient, curves and the like, and the walking safety is further improved.

As shown in fig. 2 and 3, the walking assembly further includes a walking rail 7 and a driving mechanism for driving the walking rail 7 to slide, the bracket 8 is extended from the end of the bracket 4, the hanging seat 9 is arranged at the bottom of the bracket 8, the hanging seat 9 is vertically arranged, the bottom end of the hanging seat is embedded with the walking rail 7 to be slidably hung, and the walking rail 7 is in sliding contact with the bottom of the wheel of the walking wheel box 5.

Optionally, the walking track 7 is an i-shaped guide rail, the bottom end of the hanging seat 9 is wrapped on the top of the i-shaped guide rail in a sliding mode, and a polytetrafluoroethylene plate 10 is arranged on the sliding contact surface. The tetrafluoro plate 10 is fixedly connected with the hanging seat 9 by using a countersunk head screw, so that the upper and lower contact parts of the hanging seat 9 and the rail are wear-resistant and have small friction coefficient.

The support 8 and the hanging seat 9 form a right-angle-shaped supporting structure which is fixed at the end part of the bracket 4, the walking track 7 is vertically suspended, when the jacking oil cylinder 2 extends and supports, the walking track 7 and the lower cross beam 1 move upwards together to leave the ground, then the walking track 7 is moved through the driving mechanism, the walking track 7 slides forwards on the contact surface of the tetrafluoro plate 10 on the hanging seat 9, and the whole O-shaped supporting main body does not move; after the walking track 7 slides in place, the jacking oil cylinder 2 contracts, the walking track 7 after moving is laid on the bridge floor, the walking wheels are driven to drive the whole O-shaped supporting main body to slide forwards along the guide rails, manual carrying or dragging of the tracks is not needed, and walking efficiency is high.

In fig. 2, the driving mechanism includes a hoist 11 and a wire rope 12, the hoist 11 is fixed on the upper cover plate of the lower beam 1, the middle part of the wire rope 12 is wound on the hoist 11, and two ends of the wire rope are respectively led out and fixedly connected with two ends of the walking rail 7. Optionally, both ends of the traveling rail 7 are provided with rope end fixing seats 13, and the end of the steel wire rope 12 is provided with a rope clamp 14.

Rope end fixing seats 13 are welded at two ends of the traveling track 7, rope sleeves woven by rope clamps 14 at two ends of the steel wire rope 12 penetrate through the shackles and are connected and fixed with the rope end fixing seats 13, the steel wire rope 12 is wound at the center of the winch 11 from the center of the rope, guide wheels symmetrically arranged at two sides are connected with the rope end fixing seats 13 at two ends of the track together after winding a proper number of turns on the winding drum, and a certain tension force is kept when the steel wire rope 12 is wound. The winch 11 is fixed at the central position of the lower cross beam 1 and matched with the steel wire rope 12 to pull the walking track 7, so that the walking track 7 can automatically move, and the structure is ingenious and reasonable in arrangement.

Optionally, the driving mechanism further includes an upper guide wheel 15 and a lower guide wheel 16, the upper guide wheel 15 is fixed at the top of the support 8, the lower guide wheel 16 is fixed at the middle of the hanging seat 9, and the steel wire rope 12 sequentially bypasses the upper guide wheel 15 and the lower guide wheel 16 and is then fixed with the end of the traveling rail 7. The upper guide wheel 15 and the lower guide wheel 16 are arranged up and down to form a fixed pulley group for changing the trend of the steel wire rope 12, so that the space is saved, the included angle between the trend of the end part of the steel wire rope 12 and the walking track 7 is reduced, and the horizontal component force of the force on the steel wire rope 12 acting on the guide rail is larger and more labor-saving when the sliding is driven.

The shaft mounting hole of the lower guide wheel 16 is a long round hole, and the bottom of the lower guide wheel 16 is provided with a tensioning mechanism 17 for tensioning the lower guide wheel 16 downwards. A long round hole is formed in a wallboard of a mounting support of the lower guide wheel 16, and the tensioning degree of the steel wire rope 12 can be conveniently adjusted by using the tensioning mechanism 17, so that the tensioning force of the steel wire rope 12 is kept.

In the use, when the rear landing leg supports, shrink jacking cylinder 2 earlier, lay walking track 7 on the bridge floor, lower beam 1 passes through bracket 4 and acts on walking wheel case 5, and then supports on walking track 7 through preceding, four groups of walking wheels in back, utilizes walking wheel drive can walk the certain distance. When the bridge girder erection machine strides, the walking wheels walk to the foremost ends of the walking rails 7, then the jacking oil cylinders 2 jack up to a proper height, the walking wheels are disengaged from the walking rails 7, and the hanging seats 9 hang the walking rails 7 to be disengaged from the beam surface to a proper height. The winch 11 is started to rotate in the forward direction, the steel wire rope 12 pulls and drives the traveling rail 7 to move forward, when the tail of the traveling rail 7 is close to the rear side hanging seat 9, the winch 11 brakes, the jacking oil cylinder 2 retracts to enable the traveling wheel to fall on the traveling rail 7, the traveling rail 7 falls on the beam surface, and the rear supporting leg traveling motor is started to drive the whole machine to travel forward. When the rear-leg walking wheels walk on the rails, the winding engine 11 is started to reversely rotate and release the rope, the speed of the reverse rotation of the winding engine 11 is consistent with the walking speed of the rear-leg, when the rear-leg walks to the foremost end of the walking rails 7, the position of the steel wire rope 12 on the winding drum is consistent with the position of the steel wire rope when the steel wire rope just starts to pull the walking rails 7 forwards, and a walking cycle is completed.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or that equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a landing leg mechanism behind railway bridging machine, a serial communication port, including O type main part, bottom end rail (1) both ends symmetry of O type main part is provided with supporting component and running gear, supporting component includes vertical support jacking cylinder (2) of bottom end rail (1), and fix arc backing plate (3) of jacking cylinder (2) bottom, the running gear sets up supporting component's the outside sets up including the symmetry bracket (4) and walking wheel case (5) of bottom end rail (1) both sides, walking wheel case (5) are fixed the bottom of bracket (4), and are provided with spherical hinged-support (6) between the two.

2. The rear leg mechanism of the railway bridge girder erection machine according to claim 1, wherein the walking assembly further comprises a walking rail (7) and a driving mechanism for driving the walking rail (7) to slide, a support (8) is arranged at the end of the bracket (4) in an extending manner, a hanging seat (9) is arranged at the bottom of the support (8), the hanging seat (9) is vertically arranged, the bottom end of the hanging seat is in mutual embedding and sliding hanging connection with the walking rail (7), and the walking rail (7) is in sliding contact with the bottom of the wheel of the walking wheel box (5).

3. The rear leg supporting mechanism of the railway bridge girder erection machine according to claim 2, wherein the traveling rail (7) is an I-shaped guide rail, the bottom end of the hanging seat (9) is slidably wrapped on the top of the I-shaped guide rail, and a tetrafluoro plate (10) is arranged on the sliding contact surface.

4. The rear leg mechanism of the railway bridge girder erection machine according to claim 2, wherein the driving mechanism comprises a winch (11) and a steel wire rope (12), the winch (11) is fixed on an upper cover plate of the lower cross beam (1), the middle part of the steel wire rope (12) is wound on the winch (11), and two ends of the steel wire rope are respectively led out and fixedly connected with two ends of the walking track (7).

5. The rear leg mechanism of the railway bridge girder erection machine according to claim 4, wherein both ends of the walking track (7) are provided with rope head fixing seats (13), and the end of the steel wire rope (12) is provided with a rope clamp (14).

6. The rear leg supporting mechanism of the railway bridge girder erection machine according to claim 4, wherein the driving mechanism further comprises an upper guide wheel (15) and a lower guide wheel (16), the upper guide wheel (15) is fixed on the top of the support (8), the lower guide wheel (16) is fixed on the middle part of the hanging seat (9), and the steel wire rope (12) sequentially bypasses the upper guide wheel (15) and the lower guide wheel (16) and is fixed with the end part of the walking track (7).

7. A rear leg supporting mechanism of a railway bridging machine according to claim 6, wherein the shaft mounting hole of the lower guide wheel (16) is a long round hole, and the bottom of the lower guide wheel (16) is provided with a tensioning mechanism (17) for tensioning the lower guide wheel (16) downwards.

8. The rear leg mechanism of the railway bridge girder erection machine according to claim 1, wherein the jacking cylinder (2) is arranged inside the lower cross beam (1), and the top end of the jacking cylinder is fixed by a flange seat.

9. A rear leg supporting mechanism of a railway bridge girder erection machine according to claim 1, wherein the bracket (4) is of a box-type structure and is vertically welded and fixed on the side surface of the lower cross beam (1).

10. The rear leg supporting mechanism of the railway bridge girder erection machine according to claim 9, wherein the upper and lower surfaces of the spherical hinge support (6) are fixedly connected with the bottom surface of the bracket (4) and the top surface of the traveling wheel box (5) through flanges.