Supporting leg rotating structure in bridge girder erection machine

Abstract

The utility model belongs to the technical field of gantry crane walking assistance, and provides a supporting leg rotating structure in a bridge girder erection machine, which comprises a supporting plate, an anti-torsion plate and a pushing arm, the supporting plate is divided into a wide end and a narrow end, and the wide end of the supporting plate is provided with a notch matched with the appearance of a stand column sleeve in the middle of a middle supporting leg, so that the wide end of the supporting plate is tightly attached to the outer sleeve wall of the stand column sleeve; the narrow end of the support plate is inclined towards one end of the middle support leg; the anti-torsion plates are distributed on the outer sleeve wall of the stand column sleeve at intervals in the annular direction, and anti-torsion grooves corresponding to the anti-torsion plates are formed in the wide ends of the supporting plates. A traditional mode that a hoist is used for rotating the middle supporting leg is abandoned, the oil cylinder is used as a power source, sufficient power is guaranteed, working efficiency is effectively improved, stable and rapid rotation of the middle supporting leg is guaranteed, meanwhile, the structure of each fulcrum is firm, power output of the oil cylinder is sufficiently supported, the using effect is excellent, and the service life is long. And great convenience is provided for passing of the bridge girder erection machine.

Description

Technical Field

[0001] This utility model belongs to the field of gantry crane travel assistance technology, specifically relating to a leg rotation structure in a bridge erecting machine. Background Technology

[0002] The JQSD1000-ton bridge erecting machine is currently a leading bridge erecting machine in China, with a high degree of automation and high bridge erecting efficiency. The entire bridge erecting machine consists of front outriggers, front auxiliary outriggers, middle outriggers, and rear outriggers. Because the bridge erecting machine travels through mountains and rivers and encounters complex working conditions during the bridge erecting process, and the middle outriggers of the bridge erecting machine are relatively wide and large, they cannot pass through the tunnel entrance according to the normal bridge erecting position. It is necessary to rotate the middle outriggers at a certain angle to pass smoothly.

[0003] Currently, the traditional method is to use a gourd to pull the lug at the top of the middle support leg to rotate it to a certain angle. This method takes a long time to operate, is inefficient, and may result in problems such as not being able to pull it, not pulling it fully, or getting stuck. It is also not convenient to use.

[0004] Therefore, there is a need to provide an improved technical solution for the leg rotation structure in a bridge erecting machine to address the shortcomings of the existing technology. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a leg rotation structure for a bridge erecting machine.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a rotating support leg structure for a bridge erecting machine, comprising: a support plate, an anti-torsion plate, and a push arm. The support plate is divided into a wide end and a narrow end. The wide end of the support plate has a notch adapted to the shape of the column sleeve in the middle of the support leg, so that the wide end of the support plate is tightly fitted with the outer wall of the column sleeve. The narrow end of the support plate is inclined towards one end of the support leg. The anti-torsion plates are distributed circumferentially on the outer wall of the column sleeve. The wide end of the support plate has a notch... The anti-torsion groove corresponding to the anti-torsion plate is inserted into the anti-torsion groove by displacing the support plate along the axial direction of the column sleeve; the push arm is located at the top of the middle support leg, one end of the push arm is hinged to a support, the support is located at the top of the middle support leg, and the narrow end of the support plate is inclined towards the support, the other end of the push arm is inclined towards the narrow end of the support plate and hinged thereto, so that the middle support leg can rotate around the column sleeve as the center by extending the push arm.

[0007] Preferably, the notch is arc-shaped, and the arc length of the notch is not greater than half the circumference of the column sleeve.

[0008] Preferably, the push arm is a hydraulic cylinder.

[0009] Preferably, the push arm and the narrow end of the support plate are hinged together by a hinge frame.

[0010] Preferably, the hinge frame is H-shaped;

[0011] The cylinder head of the push arm and the narrow end of the support plate respectively extend into the two U-shaped openings of the hinge frame and are hinged thereto.

[0012] Preferably, the top of the column sleeve is provided with a circular positioning plate;

[0013] The diameter of the positioning plate is larger than the diameter of the column sleeve;

[0014] The top of the anti-torsion plate is fixed to the portion of the positioning plate that extends beyond the column sleeve.

[0015] Preferably, the support plate has a corner on the side facing the push arm, and reinforcing ribs are respectively provided on the upper and lower surfaces of the support plate corresponding to the corner.

[0016] Preferably, the portion of the positioning plate extending beyond the column sleeve has multiple insertion holes spaced apart along the circumferential direction.

[0017] Preferably, a ring plate of the same diameter is placed on the upper surface of the positioning plate;

[0018] Multiple anti-torsion columns are spaced apart along the circumferential direction on the lower surface of the ring plate.

[0019] Preferably, the anti-torsion column passes through the positioning plate and the support plate in sequence, and each anti-torsion column is located between two adjacent anti-torsion plates.

[0020] Beneficial effects: This utility model abandons the traditional method of using a hoist to rotate the middle support leg, and instead uses a hydraulic cylinder as the power source to ensure sufficient power, effectively improve work efficiency, and ensure that the middle support leg rotates smoothly and quickly. At the same time, the structure of each support point of this utility model is solid and can support the power output of the hydraulic cylinder. The effect is excellent and it provides great convenience for the passage of the bridge erecting machine. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein:

[0022] Figure 1 This is a top view of the present invention;

[0023] Figure 2 for Figure 1 Schematic diagram of the fit between the central support plate and the positioning plate structure;

[0024] Figure 3 This is a schematic diagram of the overall fit between the support plate and the column sleeve of this utility model;

[0025] Figure 4 This is a schematic diagram of the overall support plate structure of this utility model;

[0026] Figure 5 This is a schematic diagram of the overall structure of the hinge frame of this utility model;

[0027] Figure 6 This is a schematic diagram of the overall fit between the ring plate and the anti-torsion column structure of this utility model;

[0028] Figure 7 This is a schematic diagram of the overall structure of the column sleeve of this utility model.

[0029] In the diagram: 1. Support plate; 2. Middle support leg; 201. Column sleeve; 3. Notch; 4. Anti-torsion groove; 5. Positioning plate; 6. Anti-torsion plate; 7. Support; 8. Push arm; 9. Hinge frame; 10. Insertion hole; 11. Ring plate; 12. Anti-torsion column; 13. Reinforcing rib. Detailed Implementation

[0030] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art are within the protection scope of this utility model.

[0031] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected" and "linked" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0032] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0033] This embodiment aims to provide a rotating structure for the middle support leg of a bridge erecting machine, the main function of which is to effectively improve work efficiency and ensure the smooth and rapid rotation of the middle support leg.

[0034] Reference Figure 1-4 and Figure 7 The system includes: a support plate 1, an anti-torsion plate 6, and a push arm 8. The support plate 1 is horizontally installed on one side of the top of the column sleeve 201 in the middle of the middle support leg 2. One end of the support plate 1 facing the column sleeve 201 is the wide end, and the other end is the narrow end. The wide end of the support plate 1 has an arc-shaped notch 3 in the middle that matches the outer wall of the column sleeve 201, and the arc length of the notch 3 is not greater than half the circumference of the column sleeve 201, so that the wide end of the support plate 1 fits tightly with the outer wall of the column sleeve 201. The surface of the wide end of the support plate 1 has multiple anti-torsion grooves 4 distributed at intervals along the arc of the notch 3. The top of the column sleeve 201 is provided with a circular positioning plate 5. The diameter of the support plate 5 is larger than the diameter of the column sleeve 201. Multiple anti-torsion plates 6 are welded circumferentially below the portion of the positioning plate 5 that extends beyond the column sleeve 201. The distance between two adjacent anti-torsion plates 6 is equal to the distance between two adjacent anti-torsion grooves 4. The top of the anti-torsion plate 6 is welded and fixed to the portion of the positioning plate 5 that extends beyond the column sleeve 201. Based on this, in actual operation, the notch 3 is pressed tightly against the outer wall of the column sleeve 201, and the support plate 1 is moved upward along the axial direction of the column sleeve 201. During this period, the anti-torsion groove 4 on the support plate 1 needs to correspond to the anti-torsion plate 6 on the column sleeve 201 so that the anti-torsion plate 6 can be inserted into the corresponding anti-torsion groove 4 after the support plate 1 is moved upward.

[0035] Reference Figure 1-5 The narrow end of the support plate 1 is inclined towards the left end of the middle support leg 2. A hydraulic cylinder support 7 is welded to the top of the left end of the middle support leg 2. The push arm 8 is inclined between the support 7 and the narrow end of the support plate 1. The push arm 8 is a hydraulic cylinder. The two ends of the push arm 8 are hinged to the support 7 and the narrow end of the support plate 1, respectively, so that the left end of the push arm 8 is inclined forward and the right end is inclined backward. The cylinder rod head of the push arm 8 is hinged to the narrow end of the support plate 1 through a hinge frame 9. The hinge frame 9 is H-shaped, which is a pair of parallel plates A limiting plate is welded vertically and centrally between the two sides to form a hinge frame 9, so that the cylinder head of the push arm 8 and the narrow end of the support plate 1 can be inserted into the two U-shaped openings of the hinge frame 9 and hinged thereto. The left side plate of the support plate 1 has a corner so that the limiting plate of the hinge frame 9 can fit tightly with the left side plate of the support plate 1, thereby restricting the rotation of the hinge frame 9 and ensuring that the force output by the push arm 8 can be transmitted to the support plate 1. The middle support leg 2 can rotate around the column sleeve 201 as the center by extending the push arm 8.

[0036] In this embodiment, the narrow end of the support plate 1 is provided with a corner on the left side facing the push arm 8, and reinforcing ribs 13 are respectively provided on the upper and lower surfaces of the support plate 1 to enhance the fracture resistance at the corner.

[0037] In this embodiment, refer to Figure 3 , Figure 4 , Figure 6 and Figure 7On the portion of the positioning plate 5 that extends beyond the column sleeve 201, multiple insertion holes 10 are spaced apart along the circumferential direction. At the same time, a ring plate 11 of the same diameter is placed on the top of the positioning plate 5. Multiple anti-torsion columns 12 are spaced apart along the circumferential direction on the lower surface of the ring plate 11, and the anti-torsion columns 12 are perpendicular to the ring plate 11. Each anti-torsion column 12 is located between two adjacent anti-torsion plates 6. The anti-torsion columns 12 are passed through the insertion holes 10 and inserted into the support plate 1 below, thereby working together with the anti-torsion plates 6 to increase the torsional strength and make the overall support structure more robust.

[0038] During use, the cylinder rod of the hydraulic cylinder can be extended to drive the middle support leg 2 to rotate. When the rotation of the middle support leg 2 reaches its upper limit under the push of the hydraulic cylinder, if it still cannot pass through the tunnel, the cylinder rod can be separated from the support plate 1 first, and then the support plate 1 can be moved down to make the anti-torsion plate 6 separate from the anti-torsion groove 4. Then, the support plate 1 is rotated clockwise to adjust the position of the narrow end of the support plate 1. Finally, the position of the support plate 1 is restored and re-hinged with the cylinder rod. During this period, the length of the cylinder rod may be adjusted according to the change of the position of the narrow end of the support plate 1. Then, the cylinder rod can be extended to continue to drive the middle support leg 2 to rotate, thereby increasing the tilt angle of the middle support leg 2 and ensuring that the entire bridge erecting machine can pass through the tunnel.

[0039] The rotating structure of the middle support leg 2 provided in this embodiment abandons the traditional method of using a hoist to rotate the middle support leg 2. Instead, it uses a hydraulic cylinder as the power source to ensure sufficient power, effectively improve work efficiency, and ensure that the middle support leg 2 rotates smoothly and quickly. At the same time, the structure of each support point is solid and can support the power output of the hydraulic cylinder. The effect is excellent and it provides great convenience for the passage of the bridge erecting machine.

[0040] It is understood that the above description is merely exemplary and the embodiments of this application do not limit the scope of the application.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be within the scope of protection of the pending claims of the present utility model.

Claims

1. A leg rotation structure in a bridge erecting machine, characterized in that, include: The support plate is divided into a wide end and a narrow end. The wide end of the support plate is provided with a notch that is adapted to the shape of the column sleeve in the middle of the support leg, so that the wide end of the support plate fits tightly with the outer wall of the column sleeve. The narrow end of the support plate is inclined toward one end of the support leg. Anti-torsion plates are distributed circumferentially on the outer cylinder wall of the column sleeve. The wide end of the support plate is provided with an anti-torsion groove corresponding to the anti-torsion plate. The anti-torsion plate is inserted into the anti-torsion groove by displacing the support plate along the axial direction of the column sleeve. A push arm is located at the top of the middle support leg. One end of the push arm is hinged to a support, which is located at the top of the middle support leg. The narrow end of the support plate is inclined towards the support. The other end of the push arm is inclined towards the narrow end of the support plate and hinged thereto, so that the middle support leg can rotate around the column sleeve as the center by extending the push arm.

2. The leg rotation structure in a bridge erecting machine according to claim 1, characterized in that, The notch is arc-shaped; The arc length of the notch is no greater than half the circumference of the column sleeve.

3. The leg rotation structure in a bridge erecting machine according to claim 1, characterized in that, The push arm is a hydraulic cylinder.

4. The leg rotation structure in a bridge erecting machine according to claim 3, characterized in that, The push arm and the narrow end of the support plate are hinged together by a hinge frame.

5. The leg rotation structure in a bridge erecting machine according to claim 4, characterized in that, The hinge frame is H-shaped; The cylinder head of the push arm and the narrow end of the support plate extend into the two U-shaped openings of the hinge frame and are hinged thereto.

6. The leg rotation structure in a bridge erecting machine according to claim 1, characterized in that, The support plate has a corner on the side facing the push arm, and reinforcing ribs are respectively provided on the upper and lower surfaces of the support plate corresponding to the corner.

7. The leg rotation structure in a bridge erecting machine according to claim 1, characterized in that, The top of the column sleeve is provided with a circular positioning plate; The diameter of the positioning plate is larger than the diameter of the column sleeve; The top of the anti-torsion plate is fixed to the portion of the positioning plate that extends beyond the column sleeve.

8. The leg rotation structure in a bridge erecting machine according to claim 7, characterized in that, The positioning plate has multiple insertion holes spaced circumferentially on the portion of its surface extending beyond the column sleeve.

9. The leg rotation structure in a bridge erecting machine according to claim 8, characterized in that, A ring plate of the same diameter is placed on the upper surface of the positioning plate; Multiple anti-torsion columns are spaced apart along the circumferential direction on the lower surface of the ring plate.

10. The leg rotation structure in a bridge erecting machine according to claim 9, characterized in that, The anti-torsion column passes through the positioning plate and the support plate in sequence, and each anti-torsion column is located between two adjacent anti-torsion plates.

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