Transverse telescopic device for supporting leg bearing of bridge erecting machine

Abstract

The utility model discloses a transverse telescopic device for supporting leg bearing of a bridge girder erection machine, which comprises a middle supporting leg supporting cross beam, the middle supporting leg supporting cross beam is arranged at the bottom of a middle supporting leg of a main truss of the bridge girder erection machine, the middle supporting leg supporting cross beam comprises a fixed section and horizontal extending sections, and the horizontal extending sections are arranged on two sides of the fixed section in a sliding mode. The bottoms of the middle supporting legs are connected to the two sides of the top face of the fixed section, a vertical jack is arranged in the middle of the bottom face of the fixed section, and an outer end supporting structure is arranged on the outer side of the bottom face of the horizontal extending section. The problem that the length of a cross beam at supporting legs in an existing bridge girder erection machine cannot be adjusted is solved.

Description

Technical Field

[0001] The utility model relates to the field of bridge erection equipment, in particular to a transverse telescopic device for the support of the legs of a bridge erector. Background Art

[0002] During the construction of existing bridges, a bridge erector is usually used to build the bridge. The bridge erector has a simple structure and is convenient to use. It is usually composed of a main truss, a front leg, a middle leg, a rear leg and a hoisting mechanism. The front leg, the middle leg and the rear leg are respectively arranged at the front, middle and rear parts of the bottom surface of the main truss.

[0003] In the above structure, the main functions of the middle leg are to support and lift the entire bridge erector and drive the bridge erector to move forward through the hole. A cross beam is provided at the bottom of the existing middle leg. However, the existing cross beam is a fixed cross beam and its length cannot be adjusted. Therefore, there is a situation where the middle leg collides with the installed suspender during walking and spanning. Moreover, the lengths of the main girders of each project are different. Therefore, the fixed-length cross beam will result in an unreasonable distribution of the vertical force transmitted by the middle leg. To solve the above problems, it is necessary to improve the cross beam at the existing middle leg. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a transverse telescopic device for the support of the legs of a bridge erector, so as to solve the problem that the cross beam at the middle leg of the existing bridge erector cannot be adjusted in length.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A transverse telescopic device for the support of the legs of a bridge erector includes a middle leg support cross beam. The middle leg support cross beam is arranged at the bottom of the middle leg of the main truss of the bridge erector. The middle leg cross beam includes a fixed section and a horizontally extending section. The horizontally extending section is slidably arranged on both sides of the fixed section. The bottom of the middle leg is connected to both sides of the top surface of the fixed section. A vertical jack is arranged in the middle of the bottom surface of the fixed section. An outer end support structure is arranged on the outer side of the bottom surface of the horizontally extending section.

[0007] The vertical force at the middle support point is transmitted to the middle leg support cross beam through the middle leg. The middle leg support cross beam is transmitted to the main longitudinal beams and the middle longitudinal beam on both sides of the main girder through the vertical jack. The middle leg support cross beam is arranged in a structure form with adjustable length, which avoids the situation of collision between the middle leg and the installed suspender during walking and spanning, and at the same time makes the distribution of the vertical force transmitted by the middle leg to the main girder more reasonable.

[0008] As a further preference of the utility model, an electric roller support is connected between the top of the middle leg and the bottom surface of the main truss of the bridge erector.

[0009] This electric roller support is a prior art and is convenient for the electric sliding of the main truss in the horizontal and transverse directions.

[0010] As a further preference of the present invention, the fixed section is a hollow steel member with a box-shaped cross-section, and the horizontally extending section is a steel member with an H-shaped cross-section. The inner end of the horizontally extending section is inserted into the hollow cavity of the fixed section, and a horizontal hydraulic cylinder is further provided in the hollow cavity of the fixed section. The output shaft of the horizontal hydraulic cylinder is connected to the inner end face of the horizontally extending section.

[0011] The expansion and retraction of the horizontally extending section can be conveniently and quickly controlled through the horizontal hydraulic cylinder.

[0012] As a further preference of the present invention, the outer surface of the fixed section is also evenly provided with reinforcing ribs arranged around its outer wall.

[0013] In this way, the fixed section has stronger compressive capacity, more stable support and is not easily deformed.

[0014] As a further preference of the present invention, evenly arranged ball arrays are provided at the positions of the upper end face and the lower end face close to the outside in the hollow cavity of the fixed section.

[0015] The arranged ball arrays can smoothly complete the sliding of the horizontally extending section, and the friction force is small in this way.

[0016] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0017] 1. The vertical force on the middle fulcrum is transmitted to the middle leg support cross beam through the middle leg, and the middle leg support cross beam is transmitted to the main longitudinal beams and the middle longitudinal beam on both sides of the main beam through the vertical jack. The middle leg support cross beam is set in a structural form with adjustable length, avoiding the situation of hitting the installed suspender when the middle leg walks and crosses, and at the same time making the distribution of the vertical force transmitted by the middle leg to the main beam more reasonable.

[0018] 2. This electric roller support is a prior art and is convenient for the electric sliding of the main truss in the horizontal and transverse directions.

[0019] 3. The expansion and retraction of the horizontally extending section can be conveniently and quickly controlled through the horizontal hydraulic cylinder.

[0020] 4. The fixed section has stronger compressive capacity, more stable support and is not easily deformed.

[0021] 5. The arranged ball arrays can smoothly complete the sliding of the horizontally extending section, and the friction force is small in this way. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the present invention.

[0023] Figure 2 For the present utility model Figure 1 side view

[0024] Figure 3 is the sectional view of the middle support cross beam. Specific embodiments

[0025] To make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Usually, the components of the embodiments of the present utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0027] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0028] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0029] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Specific Embodiment 1:

[0032] Figure 1 、 Figure 2 、 Figure 3 Fig. shows a lateral telescopic device for the leg bearing of a bridge erecting machine, including a middle leg support cross beam 1, the middle leg support cross beam 1 is arranged at the bottom of the middle leg 2 of the main truss of the bridge erecting machine, the middle leg cross beam 1 includes a fixed section 11 and a horizontally extending section 12, the horizontally extending section 12 is slidably arranged on both sides of the fixed section 11, the bottom of the middle leg 2 is connected to both sides of the top surface of the fixed section 11, a vertical jack 3 is arranged in the middle of the bottom surface of the fixed section 11, and an outer end support structure 4 is arranged on the outer side of the bottom surface of the horizontally extending section 12.

[0033] The vertical force at the middle support point is transmitted to the middle leg support cross beam through the middle leg, and the middle leg support cross beam is transmitted to the main longitudinal beams and the middle longitudinal beam on both sides of the main beam through the vertical jack. The middle leg support cross beam is arranged in a structure with adjustable length, which avoids the situation of collision with the installed suspension rods when the middle leg walks and crosses the span, and at the same time makes the distribution of the vertical force transmitted by the middle leg to the main beam more reasonable. Specific Embodiment 2:

[0035] This embodiment further describes the middle leg 2 on the basis of Specific Embodiment 1. The top of the middle leg 2 is connected to the bottom surface of the main truss of the bridge erecting machine through an electric roller support 5.

[0036] This electric roller support is a prior art, which is convenient for the horizontal and lateral electric sliding of the main truss. Specific Embodiment 3:

[0038] This embodiment further describes the middle leg 2 on the basis of Specific Embodiment 1. The fixed section 11 is a hollow steel member with a box-shaped cross section, and the horizontally extending section 12 is a steel member with an H-shaped cross section. The inner end of the horizontally extending section 12 is inserted into the hollow cavity of the fixed section 11, and a horizontal hydraulic cylinder 6 is also arranged in the hollow cavity of the fixed section 11. The output shaft of the horizontal hydraulic cylinder 6 is connected to the inner end face of the horizontally extending section 12.

[0039] The deployment and retraction of the horizontal extension section can be conveniently and quickly controlled by a horizontal hydraulic cylinder. Specific Embodiment 4:

[0041] This embodiment further describes the fixed section 11 on the basis of Specific Embodiment 1. Reinforcing ribs 111 are evenly arranged on the outer surface of the fixed section 11 around its outer wall.

[0042] In this way, the fixed section has stronger compressive capacity, more stable support, and is not easily deformed. Specific Embodiment 5:

[0044] This embodiment further describes the fixed section 11 on the basis of Specific Embodiment 1. Ball arrays 112 are evenly arranged at the positions on the outer sides of the upper end face and the lower end face in the hollow cavity of the fixed section 11.

[0045] The provided ball arrays can smoothly complete the sliding of the horizontal extension section, and the friction is small.

[0046] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A lateral telescopic device for supporting legs of a bridge erecting machine, characterized in that: The invention comprises a middle leg support beam (1), wherein the middle leg support beam (1) is arranged at the bottom of the middle leg (2) of the main truss of the bridge erecting machine, the middle leg support beam (1) comprises a fixed section (11) and a horizontal extension section (12), the horizontal extension section (12) is slidably arranged on both sides of the fixed section (11), the bottom of the middle leg (2) is connected to both sides of the top surface of the fixed section (11), a vertical jack (3) is arranged in the middle of the bottom surface of the fixed section (11), and an outer end support structure (4) is arranged on the outer side of the bottom surface of the horizontal extension section (12).

2. The lateral telescopic device for supporting legs of a bridge erecting machine according to claim 1, characterized in that: The top of the middle support leg (2) is connected to the bottom surface of the main truss of the bridge erecting machine via an electric roller support (5).

3. The lateral telescopic device for supporting legs of a bridge erecting machine according to claim 1, characterized in that: The fixed section (11) is a hollow steel member with a box-shaped cross section, and the horizontal extension section (12) is a steel member with an H-shaped cross section. The inner end of the horizontal extension section (12) is inserted into the hollow cavity of the fixed section (11). A horizontal hydraulic cylinder (6) is also provided in the hollow cavity of the fixed section (11), and the output shaft of the horizontal hydraulic cylinder (6) is connected to the inner end surface of the horizontal extension section (12).

4. The lateral telescopic device for supporting legs of a bridge erecting machine according to claim 3 is characterized in that: The outer surface of the fixing section (11) is also evenly provided with reinforcing ribs (111) arranged around the outer wall thereof.

5. The lateral telescopic device for supporting legs of a bridge erecting machine according to claim 3, characterized in that: Evenly distributed ball arrays (112) are provided at the outer portions of the upper end surface and the lower end surface in the hollow cavity of the fixed section (11).

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