Horizontal steering device for portal frame

Abstract

The utility model relates to the technical field of expressway engineering, in particular to a horizontal steering device for a portal frame, which comprises two walking beams, the two walking beams are used for being arranged at the lower ends of two supporting legs of the portal frame in a one-to-one correspondence mode, and jacking mechanisms and two walking steering devices are arranged below the two walking beams. The jacking mechanisms are detachably arranged below the middles of the corresponding walking beams, the lower ends of the jacking mechanisms abut against the ground, each walking steering device comprises a walking wheel train and a steering structure, the two walking wheel trains are detachably arranged at the two ends of the corresponding walking beams, the upper ends of the steering structures are connected to the positions, between the two walking wheel trains, of the walking beams, and the lower ends of the steering structures abut against the ground. The lower end of the steering structure abuts against the ground. According to the utility model, the construction site area investment of a precast beam field is reduced, the construction cost is reduced, and the steering efficiency of the gantry crane is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of highway engineering, in particular to a horizontal steering device for a gantry. Background Art

[0002] During the construction of highway bridges, the production, storage and transportation of precast beams require large-scale mechanical equipment for auxiliary lifting. Gantry cranes on the market generally require the use of a precast beam yard with straight-line movement, which can complete the turning from one position to another in an arc. However, turning in place not only requires a larger site, but also requires reversing and re-calibration after the walking position deviates. It is not suitable for most lifting operation environments, has low efficiency, and is affected by the site environment. The construction of some beam yards cannot be carried out according to the normal use conditions of gantry cranes. Therefore, the construction of traditional precast beam yards with straight-line movement cannot meet the project construction needs.

[0003] At present, the commonly used walking device modification construction methods at home and abroad are as follows: use a pin to connect the top of the walking wheel box and the lower crossbeam pin connection. Although the use of a pin shaft insertion connection can increase flexibility and shorten the turning radius, in actual use, the connection position between the walking wheel box and the gantry crane is affected by the inertia of the object when the walking wheel box turns, resulting in the turning radius of the walking wheel box still being too large. In addition, the walking wheel box is mostly installed and fixed by bolts or welding, and the disassembly and assembly of the walking wheel box is relatively laborious. Utility Model Content

[0004] In order to solve the problems in the background technology, the utility model proposes a horizontal steering device for a gantry crane. The utility model reduces the investment in construction site area of ​​a prefabricated beam yard, reduces construction costs, and improves the steering efficiency of the gantry crane.

[0005] To solve the above problems, the present invention adopts the following technical solutions: a horizontal steering device for a gantry, comprising two walking beams, the two walking beams being used to be arranged one-to-one at the lower ends of the two legs of the gantry, a jacking mechanism and two walking steering devices are arranged below the two walking beams, the jacking mechanism is detachably arranged below the middle part of the corresponding walking beam and the lower end is in contact with the ground, the two walking steering devices each include a walking wheel train and a steering structure, the two walking wheel trains are detachably arranged at the two ends of the corresponding walking beams, the upper end of the steering structure is connected to the walking beam between the two walking wheel trains, and the lower end of the steering structure is in contact with the ground.

[0006] Furthermore, the steering structure includes an upper turntable, a lower turntable, a rotating shaft, a steel rail, four fixing pins and four expansion bolts. The rotating shaft is arranged between the upper turntable and the lower turntable. The four fixing pins are arranged circumferentially between the upper turntable and the lower turntable. The upper ends of the four fixing pins are connected to the upper turntable, and the lower ends are connected to the lower turntable. The steel rail is welded on the upper turntable. The four expansion bolts are evenly spaced on the outer ring of the lower turntable and are used to connect the gantry track.

[0007] Furthermore, the upper turntable and the lower turntable are both made of steel, and both have a thickness of 10 mm and a diameter of 500 mm.

[0008] Furthermore, the rotating shaft and the four fixing pins are all round steel, the diameter of the rotating shaft is 28 mm, and the diameter of the four fixing pins is 20 mm.

[0009] Furthermore, the intersection angle between two adjacent fixing pins is 90°.

[0010] Furthermore, the intersection angle between two adjacent expansion bolts is 90°.

[0011] Furthermore, the two walking beams are arranged parallel to each other, and the four walking steering devices provided on the two walking beams are arranged in a rectangular array.

[0012] The beneficial effects of the present invention are as follows: the present invention controls the raising and lowering of the walking beam through the jacking mechanism. After the walking beam is raised, the steering structure supports and rotates the gantry. The steering of the gantry is driven manually or with the help of external force until the four walking wheel systems reach the preset movement direction to complete the 90° steering of the gantry. Compared with the existing technology, the present invention can realize the steering of the gantry in a narrow area, has a wide range of applications, high precision, and greatly improves the efficiency of the gantry crane installation and steering construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 for Figure 1 Side view of;

[0016] Figure 3 for Figure 2 A local enlarged view of point Ⅰ.

[0017] 1. Traveling beam; 2. Support legs; 3. Lifting mechanism; 4. Traveling steering device; 5. Traveling wheel system; 6. Steering structure; 7. Upper turntable; 8. Lower turntable; 9. Rotating shaft; 10. Rail; 11. Fixing pin; 12. Expansion bolt. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] The utility model controls the raising and lowering of the walking beam 1 through the jacking mechanism 3. After the walking beam 1 is raised, the steering structure 6 supports and rotates the gantry. The steering of the gantry is driven manually or with the help of external force until the four walking wheel systems 5 reach the preset movement direction to complete the 90° steering of the gantry. Compared with the existing technology, the utility model can realize the steering of the gantry in a narrow area, has a wide range of applications, high precision, and greatly improves the efficiency of the gantry crane installation and steering construction.

[0020] Specifically, a horizontal steering device for a gantry includes two walking beams 1, and the two walking beams 1 are used to be arranged one-to-one at the lower ends of the two legs 2 of the gantry. A jacking mechanism 3 and two walking steering devices 4 are arranged below the two walking beams 1. The jacking mechanism 3 is detachably arranged below the middle part of the corresponding walking beam 1 and the lower end is in contact with the ground. The two walking steering devices 4 each include a walking wheel train 5 and a steering structure 6. The two walking wheel trains 5 are detachably arranged at the two ends of the corresponding walking beams 1. The upper end of the steering structure 6 is connected to the walking beam 1 between the two walking wheel trains 5, and the lower end of the steering structure 6 is in contact with the ground.

[0021] Furthermore, the steering structure 6 includes an upper turntable 7, a lower turntable 8, a rotating shaft 9, a steel rail 10, four fixing pins 11 and four expansion bolts 12. The rotating shaft 9 is arranged between the upper turntable 7 and the lower turntable 8. The four fixing pins 11 are arranged at circumferential intervals between the upper turntable 7 and the lower turntable 8. The upper ends of the four fixing pins 11 are connected to the upper turntable 7, and the lower ends are connected to the lower turntable 8. The steel rail 10 is welded on the upper turntable 7. The four expansion bolts 12 are evenly spaced on the outer ring of the lower turntable 8 and are used to connect the gantry track.

[0022] Furthermore, the upper turntable 7 and the lower turntable 8 are both made of steel, and the thickness of the upper turntable 7 and the lower turntable 8 are both 10 mm, and the diameter of the upper turntable 7 and the lower turntable 8 are both 500 mm.

[0023] Furthermore, the rotating shaft 9 and the four fixing pins 11 are all made of round steel, the diameter of the rotating shaft 9 is 28 mm, and the diameter of the four fixing pins 11 is 20 mm.

[0024] Furthermore, the intersection angle between two adjacent fixing pins 11 is 90°.

[0025] Furthermore, the intersection angle between two adjacent expansion bolts 12 is 90°.

[0026] Furthermore, the two walking beams 1 are arranged parallel to each other, and the four walking steering devices 4 provided on the two walking beams 1 are arranged in a rectangular array.

[0027] When the utility model is in use, the walking beam 1 is first lifted up by the jacking mechanism 3, so that the four walking wheel systems 5 at the lower ends of the two legs 2 of the gantry are suspended in the air, and the device is rotated 90 degrees manually or with the help of external force until the movement direction of the four walking wheel systems 5 at the lower ends of the two legs 2 reaches the preset direction, and the walking beam 1 is controlled to fall by the jacking mechanism 3, and then the gantry is made to move forward or backward in a straight line along the preset direction by rolling the walking wheel system 5, thereby completing the 90 degree turning of the gantry. Compared with the traditional scheme, the 90 degree turning cost of the gantry of the utility model is low, the operation accuracy and precision are high, and the application range is wide. It can achieve the purpose of turning in narrow areas and improve the turning efficiency.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A horizontal steering device for a gantry, characterized by: The invention comprises two walking beams (1), the two walking beams (1) are used to be arranged at the lower ends of two legs (2) of a gantry frame in a one-to-one correspondence, and a jacking mechanism (3) and two walking steering devices (4) are arranged below the two walking beams (1). The jacking mechanism (3) is detachably arranged below the middle part of the corresponding walking beam (1) and the lower end thereof abuts against the ground. The two walking steering devices (4) each comprise a walking wheel train (5) and a steering structure (6), the two walking wheel trains (5) are detachably arranged at the two ends of the corresponding walking beam (1), the upper end of the steering structure (6) is connected to the walking beam (1) between the two walking wheel trains (5), and the lower end of the steering structure (6) abuts against the ground.

2. A horizontal steering device for a gantry according to claim 1, characterized in that: The steering structure (6) comprises an upper turntable (7), a lower turntable (8), a rotating shaft (9), a steel rail (10), four fixing pins (11) and four expansion bolts (12); the rotating shaft (9) is arranged between the upper turntable (7) and the lower turntable (8); the four fixing pins (11) are arranged at intervals along the circumferential direction between the upper turntable (7) and the lower turntable (8); the upper ends of the four fixing pins (11) are connected to the upper turntable (7), and the lower ends are connected to the lower turntable (8); the steel rail (10) is welded to the upper turntable (7); and the four expansion bolts (12) are evenly spaced and arranged on the outer ring of the lower turntable (8) and are used to connect the gantry rail.

3. The horizontal steering device for a gantry according to claim 2, characterized in that: The upper turntable (7) and the lower turntable (8) are both made of steel, and both have a thickness of 10 mm and a diameter of 500 mm.

4. The horizontal steering device for a gantry according to claim 2, characterized in that: The rotating shaft (9) and the four fixing pins (11) are all made of round steel. The diameter of the rotating shaft (9) is 28 mm, and the diameter of the four fixing pins (11) is 20 mm.

5. The horizontal steering device for a gantry according to claim 2, characterized in that: The intersection angle between two adjacent fixing pins (11) is 90°.

6. The horizontal steering device for a gantry according to claim 2, characterized in that: The intersection angle between two adjacent expansion bolts (12) is 90°.

7. A horizontal steering device for a gantry according to any one of claims 1 to 6, characterized in that: The two walking beams (1) are arranged parallel to each other, and the four walking steering devices (4) arranged on the two walking beams (1) are arranged in a rectangular array.

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