CN211897905U - Steering system of a bridge erecting machine - Google Patents

Abstract

The utility model relates to a steering system of a bridge erecting machine, comprising a first steering mechanism and a second steering mechanism, wherein the first steering mechanism comprises a traveling vehicle bottom, the traveling vehicle bottom comprises a beam and a supporting leg, and the left end of the beam A first leg is installed, and a second leg is installed at the right end of the beam; a circular hole is opened in the middle of the beam, and a jacking assembly is installed in the circular hole; the second steering mechanism includes the traveling vehicle bottom, For the jacking assembly and the hydraulic drive assembly, a hydraulic drive assembly is connected to the right side wall of the second leg of the second steering mechanism, and the hydraulic drive assembly includes a hydraulic cylinder and a connecting rod. The front end of the rod is connected to the second leg of the second steering mechanism, and the cylinder body of the hydraulic cylinder is connected with a connecting rod. In the process of turning, it will not cause any damage to the metal structure of the bridge erecting machine, and the operation is simple, and can be applied to the overall steering of the bridge erecting machine, filling the gap of the current bridge erecting machine without steering system.

Description

Steering system of a bridge erecting machine

technical field

The utility model relates to the technical field of building construction, in particular to a steering system of a bridge erecting machine.

Background technique

The bridge erecting machine is one of the most important construction equipment in the construction of various bridges at present. It is mainly used in the hoisting of beam pieces in bridge construction. Therefore, with the completion of the hoisting of beam pieces of each span, it is necessary to move forward one span. There is a turning radius within the design standard range. The center of the previous span and the center of the latter span are not on the same straight line. It is necessary to steer according to the design and the actual position of the bridge pier, and then move forward one span. Because the bridge erecting machine currently in use has no steering If the system needs to be turned during construction, usually after longitudinally shifting the cart track of the equipment, the cart traverse mechanisms on both sides run in opposite directions respectively (if left steering is required, move the right cart traverse mechanism forward. operation, the left trolley traverse mechanism runs backward) to complete the steering. This operation will greatly damage the equipment to the steel structure, which may lead to deformation, and it is a manual operation. Changes will occur, causing the car to derail and fall as a whole.

Utility model content

In order to solve the above problems, the purpose of the present utility model is to provide a steering system of a bridge erecting machine, so as to realize the steering of the bridge erecting machine.

In the embodiment of the present utility model, the following solutions are adopted: a steering system of a bridge erecting machine is provided, including a first steering mechanism and a second steering mechanism, wherein the first steering mechanism includes a traveling vehicle bottom, and the traveling vehicle bottom includes a beam and supporting legs, the left end of the beam is installed with a first leg, the right end of the beam is installed with a second leg, and the bottoms of the first and second legs are installed with walking wheels; A round hole is opened in the middle, and a jacking assembly is installed in the round hole; the jacking assembly includes a drum installed in the round hole of the beam, and a jacking shaft is installed in the drum. A screw blade is installed on the outer wall of the lift shaft, the lower end of the lift is connected with a worm, the worm is connected with a worm wheel, the worm wheel is driven by a motor, the upper end of the lift shaft is provided with a slewing support, the rotating drum is The inner side wall of the machine is provided with a lifting support wheel, the lifting support wheel is matched with the helical blade, and the axial direction of the lifting support wheel and the axial direction of the lifting shaft are perpendicular to each other;

The second steering mechanism includes the bottom of the traveling vehicle, the jacking assembly and the hydraulic drive assembly, the right side wall of the second leg of the second steering mechanism is connected with a hydraulic drive assembly, and the hydraulic drive assembly It includes a hydraulic cylinder and a connecting rod. The front end of the piston rod of the hydraulic cylinder is connected to the second leg of the second steering mechanism. The cylinder body of the hydraulic cylinder is connected with a connecting rod. The bottom of the walking car is erected on the arc-shaped steering track.

In an embodiment of the present invention, a lifting lug groove is formed on the side wall of the second leg of the second steering mechanism, and threaded holes are longitudinally equidistant in the lifting lug groove, and the upper part of the lifting lug and The lower part is symmetrically provided with through holes, the spacing between the two adjacent threaded holes in the lifting lug groove is equal to the spacing between the two through holes of the lifting lug, the bolts are locked into the threaded holes through the through holes, and the lifting lugs are connected to the threaded holes. The piston rod of the hydraulic cylinder is hinged.

In an embodiment of the present utility model, a jack-up support wheel is installed on the left and right parts of the rotating drum, and the wheelbase in the vertical direction of the two lift-up support wheels is equal to 1/2 of the helical blades. The two lifting support wheels are located between two adjacent helical blades; the lifting support wheel is provided with a rotating shaft, and the tail of the rotating shaft is connected with a bearing seat, and the bearing seat is fixed on the rotating shaft. on the connection between the outer side wall of the cylinder and the upper surface of the beam.

In an embodiment of the present invention, a second bearing is connected between the rotating shaft and the bearing seat.

In an embodiment of the present invention, the connecting rod includes a first connecting rod and a second connecting rod, and the first connecting rod is provided with an elongated T-shaped groove located at the left part of the first connecting rod, so the The right part of the second connecting rod is provided with a threaded hole, and the bolt passes through the T-shaped groove and penetrates into the threaded hole to be tightened; the right end of the hydraulic cylinder is hinged with the left end of the second connecting rod.

In an embodiment of the present invention, a top limit electrical switch is installed in the drum.

In an embodiment of the present invention, a first bearing is installed on the top and bottom of the rotating drum, the outer ring of the first bearing is fixedly connected with the rotating drum, and the inner ring of the first bearing is connected with the lifting drum. The shaft is fixedly connected.

Beneficial effects of the present utility model: The utility model provides a steering system for a bridge erecting machine. The outrigger beam of the bridge erecting machine is lifted through the first steering mechanism and the second steering mechanism. It will rotate relative to the beam, and the rotation of the slewing support itself can effectively avoid the torque generated by the support on the beam, so that the metal structure of the bridge erecting machine will not be damaged during the turning process, and the operation is simple and can be applied to the frame The overall steering of the bridge machine fills the gap of the current bridge machine without steering system.

Description of drawings

FIG. 1 is a schematic structural diagram of a second steering mechanism of a steering system of a bridge erecting machine.

FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 1 .

FIG. 3 is a partial enlarged schematic diagram of part B of FIG. 1 .

FIG. 4 is a partial enlarged schematic view of C in FIG. 1 .

FIG. 5 is a partial enlarged schematic diagram of D of FIG. 2 .

FIG. 6 is a schematic structural diagram of a first steering mechanism of a steering system of a bridge erecting machine.

Figure 7 is a simplified schematic diagram of the bridge erecting machine before and after steering and the arc-shaped steering track.

FIG. 8 is a schematic view of the structure of the traveling wheel frame on the arc-shaped steering track.

Detailed ways

The present utility model will be further described below in conjunction with the accompanying drawings.

Please refer to FIG. 1 to FIG. 8 , the present invention provides a steering system for a bridge erecting machine, including a first steering mechanism and a second steering mechanism, the first steering mechanism includes a traveling vehicle bottom, and the traveling vehicle bottom Including a beam 1 and legs, the left end of the beam 1 is installed with a first leg 2, the right end of the beam 1 is installed with a second leg 8, the bottom of the first leg 2, the second leg 8 A traveling wheel 19 is installed; a circular hole is opened in the middle of the beam 1, and a jacking assembly is installed in the circular hole; the jacking assembly includes a rotating drum 20 installed in the circular hole of the beam 1, so A jacking shaft 5 is installed in the rotating drum 20, a screw blade 3 is installed on the outer wall of the jacking shaft 5, a worm 9 is connected to the lower end of the jacking, and the worm 9 is connected with a worm wheel 10. 10 is driven by a motor, the upper end of the lifting shaft is provided with a slewing support 6, the inner side wall of the rotating drum 20 is provided with a lifting support wheel 14, and the lifting support wheel 14 cooperates with the helical blade 3, The axial direction of the lifting support wheel 14 is perpendicular to the axial direction of the lifting shaft 5;

The second steering mechanism includes the bottom of the traveling vehicle, the jacking assembly and the hydraulic drive assembly. A hydraulic drive assembly is connected to the right side wall of the second leg 8 of the second steering mechanism. The assembly includes a hydraulic cylinder 15 and a connecting rod 18, the front end of the piston rod 16 of the hydraulic cylinder 15 is connected to the second leg 8 of the second steering mechanism, and the cylinder body of the hydraulic cylinder 15 is connected with the connecting rod 18 , the connecting rod is fixed on a fixed object, and the hydraulic cylinder is pushed out to drive the second steering mechanism to move so as to realize the steering of the bridge erecting machine. The radius of curvature of the track can be 40m, which is the middle value of the distance between the front and rear outriggers of the common bridge machine (usually 30m-50m).

Please refer to Fig. 1, Fig. 7, Fig. 8. In an embodiment of the present utility model, the tread of the traveling wheel of the system is wider than the top surface of the arc-shaped steering track, and the steering angle of the bridge erection machine is generally relatively small during the steering process. Therefore, The gap between the steering radius of the bridge erecting machine and the radius of the arc steering track can be completely adjusted by the redundancy of the combination between the traveling wheel and the track, which can achieve free rotation.

Please continue to refer to FIG. 1 , in an embodiment of the present invention, a lifting lug groove is formed on the side wall of the second leg 8 of the second steering mechanism, and there are threaded holes longitudinally and equally spaced in the lifting lug groove, The upper and lower parts of the lifting lug 17 are symmetrically provided with through holes, the spacing between two adjacent threaded holes in the lifting lug groove is equal to the spacing between the two through holes of the lifting lug 17, and the bolts pass through the through holes and lock into the thread In the hole, the lifting lug 17 is hinged with the piston rod 16 of the hydraulic cylinder 15. Due to the different heights of the fixed objects on the construction site, it is convenient for the connecting rod to be connected with the fixed object, so as to facilitate the support legs of the hydraulic cylinder and the bottom of the traveling vehicle. Vertically and completely transmit the thrust of the hydraulic cylinder to the bottom of the traveling vehicle.

Please continue to refer to FIG. 2 , in an embodiment of the present invention, the front and rear parts of the lower surfaces of the first leg 2 and the second leg 8 are equipped with the walking wheels 19, which are convenient for mobile use. Even by force.

Please continue to refer to FIG. 1 , FIG. 3 , and FIG. 6 , in an embodiment of the present invention, a lifting support wheel 14 is installed on the left and right parts of the rotating drum 20 , and the two lifting support wheels 14 are vertical The wheelbase in the straight direction is equal to 1/2 of the pitch of the helical blades 3, and the two lifting support wheels 14 are located between the two adjacent helical blades 3; the lifting support wheels 14 are provided with a rotating shaft 21 , the rear of the rotating shaft 21 is connected with a bearing seat 12, and the bearing seat 21 is fixed on the connection between the outer side wall of the rotating drum 20 and the upper surface of the beam 1, so as to ensure the smooth rotation of the lifting support wheel and realize the Smooth lift of the lift shaft.

Please continue to refer to FIG. 1 , FIG. 3 , and FIG. 6 , in an embodiment of the present invention, a second bearing 13 is connected between the rotating shaft 21 and the bearing seat 12 .

Please continue to refer to FIG. 1 , in an embodiment of the present invention, the connecting rod 18 includes a first connecting rod 182 and a second connecting rod 181 , and the first connecting rod 182 is provided with an elongated T-shaped slot located at the The left part of the first connecting rod 182 and the right part of the second connecting rod 181 are provided with threaded holes, and the bolts pass through the T-shaped grooves and penetrate into the threaded holes to be tightened; the right end of the hydraulic cylinder 15 It is hinged with the left end of the second connecting rod 181, so as to facilitate the connection by adjusting the length according to the distance between the fixed object and the hydraulic cylinder on the construction site.

Please continue to refer to FIG. 1 and FIG. 6 , in an embodiment of the present invention, an upper limit electrical switch 7 is installed on the top of the rotating drum 20 to limit the stroke of the jacking shaft.

Please continue to refer to FIG. 1 and FIG. 6. In an embodiment of the present invention, a first bearing 4 is installed on the top and bottom of the rotating drum 20, and the outer ring of the first bearing 4 is fixedly connected with the rotating drum 20. The inner ring of the first bearing 4 is fixedly connected with the jacking shaft 5 to ensure that the jacking shaft rotates evenly.

In an embodiment of the present invention, the motor that drives the worm gear 10 is preferably a deceleration motor, and what the system requires to protect is the mechanical structure. As for how to control the motor, the upper limit electrical switch, the hydraulic cylinder and the circuit structure, all are The existing technology does not require protection.

The utility model has the following working principle:

The first steering mechanism (without hydraulic drive components) is installed in the middle of the beam of the front outriggers of the bridge erecting machine, and the second steering mechanism (with hydraulic drive components) is placed in the middle of the beams of the rear outriggers of the bridge erecting machine. On the ground of the site, two arc-shaped steering tracks with a length of about 2-3m are laid longitudinally (this track is the track of the steering system) and the track of the bridge erecting machine is perpendicular to each other. Adjusting the gauge between the two arc-shaped steering tracks is equivalent to the device The wheel spacing of the walking wheels, frame the walking wheels on the two arc-shaped steering rails, and then connect the hydraulic cylinder on the side of the outrigger of the system to the fixed object or bracket outside the bridge erection machine (adjust the The height of the hydraulic cylinder and the length of the connecting rod can adjust the distance between the device and the fixed object). After all connections are completed, the motors of the front and rear steering mechanisms can be started (the motors are controlled in two directions; the front and rear devices can be simultaneously or Start respectively), the motor drives the worm wheel to rotate, when the motor drives the worm wheel to rotate counterclockwise, the worm wheel then drives the worm to rotate clockwise, due to the effect of the jacking wheel on the helical blade, the worm moves up slowly (the worm runs according to the size of the bridge erecting machine). Set the upper limit electrical switch for the height of the wheel rim, generally set at 30mm-50mm), so that the slewing support lifts the front and rear outrigger beams until the upper limit electrical switch operates. On the track surface, the hydraulic device installed at the rear outrigger is activated (the operation of the hydraulic cylinder is controlled by the three-position four-way solenoid valve), the piston rod of the hydraulic cylinder is pushed out, and the rear end part moves to the left (the front end does not move at this time), When the bridge erecting machine is formed, turn right, otherwise, turn left. After turning the direction, after adjusting the position of the cart track, reversely drive the motors of the front and rear steering mechanisms to make the worm wheel rotate clockwise and drive the worm to rotate counterclockwise. Go down, make the wheels of the cart smoothly stand on the track of the cart, and then remove the front and rear devices to complete all the steering work. The above descriptions are only preferred embodiments of the present invention and should not be construed as limitations to the present application. All equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

Claims (7)

1. A steering system of a bridge erecting machine is characterized in that: comprising a first steering mechanism and a second steering mechanism, the first steering mechanism comprises a traveling vehicle bottom, and the traveling vehicle bottom includes a beam and a supporting leg, and the The left end of the beam is installed with a first leg, the right end of the beam is installed with a second leg, and the bottoms of the first leg and the second leg are installed with walking wheels; the middle of the beam is provided with a circular hole, A jacking assembly is installed in the circular hole; the jacking assembly includes a rotating drum installed in the circular hole of the beam, a jacking shaft is installed in the rotating drum, and an outer wall of the jacking shaft is installed There are helical blades, the lower end of the lift is connected with a worm, the worm is connected with a worm wheel, the worm wheel is driven by a motor, the upper end of the lift shaft is provided with a slewing support, and the inner side wall of the drum is installed with a worm wheel. a jack-up support wheel, the jack-up support wheel is matched with the helical blade, and the axial direction of the jack-up support wheel and the axial direction of the jack-up shaft are perpendicular to each other; The second steering mechanism includes the bottom of the traveling vehicle, the jacking assembly and the hydraulic drive assembly, the right side wall of the second leg of the second steering mechanism is connected with a hydraulic drive assembly, and the hydraulic drive assembly It includes a hydraulic cylinder and a connecting rod. The front end of the piston rod of the hydraulic cylinder is connected to the second leg of the second steering mechanism. The cylinder body of the hydraulic cylinder is connected with a connecting rod. The bottom of the walking car is erected on the arc-shaped steering track. 2 . The steering system of a bridge erecting machine according to claim 1 , wherein a lifting lug groove is formed on the side wall of the second leg of the second steering mechanism, and the longitudinal direction in the lifting lug groove is longitudinal. 3 . There are threaded holes at equal intervals, the upper and lower parts of the lifting lug are symmetrically provided with through holes, the spacing between two adjacent threaded holes in the lifting lug groove is equal to the spacing between the two through holes of the lifting lug, and the bolts pass through. The through hole is locked into the threaded hole, and the lifting lug is hinged with the piston rod of the hydraulic cylinder. 3 . The steering system of a bridge erecting machine according to claim 1 , wherein the left part and the right part in the rotating drum are both provided with a jacking support wheel, and the two jacking support wheels are vertical. 4 . The wheelbase in the direction is equal to 1/2 of the pitch of the helical blades, and the two lifting support wheels are located between two adjacent helical blades; the lifting support wheel is provided with a rotating shaft, and the tail of the rotating shaft A bearing seat is connected, and the bearing seat is fixed on the connection between the outer side wall of the rotating drum and the upper surface of the beam. 4 . The steering system of a bridge erecting machine according to claim 3 , wherein a second bearing is connected between the rotating shaft and the bearing seat. 5 . 5 . The steering system of a bridge erecting machine according to claim 1 , wherein the connecting rod comprises a first connecting rod and a second connecting rod, and an elongated T is formed on the first connecting rod. 6 . The groove is located on the left part of the first connecting rod, the right part of the second connecting rod is provided with a threaded hole, and the bolt passes through the T-shaped groove and penetrates into the threaded hole to be tightened; The right end is hinged with the left end of the second link. 6 . The steering system of a bridge erecting machine according to claim 1 , wherein an upper limit electrical switch is installed on the top of the rotating drum. 7 . 7 . The steering system of a bridge erecting machine according to claim 1 , wherein a first bearing is installed on the top and the bottom of the rotating drum, and the outer ring of the first bearing is fixedly connected to the rotating drum. 8 . , the inner ring of the first bearing is fixedly connected with the jacking shaft.

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