Automatic transposition longitudinal moving device for truss girder bridge girder erection machine

Abstract

The utility model provides an automatic transposition longitudinal moving device for a truss girder bridge girder erection machine, which comprises a truss girder, a supporting leg mechanism, a longitudinal moving oil cylinder, a hanging longitudinal beam and a longitudinal moving trolley, and the longitudinal moving trolley comprises a middle lug seat assembly, a reverse buckling assembly, a connecting shaft, a swinging working block, a limiting bolt and an oil cylinder connecting lug seat; the two sides of the middle lug base assembly are each provided with a left-hand-buckling assembly, and the middle lug base assembly and the two left-hand-buckling assemblies are connected through bolts and then hung on the hanging longitudinal beam. The swing working block is assembled in a middle neutral position of the middle lug base assembly through the connecting shaft, an oil cylinder connecting lug base is arranged on one side of the middle lug base assembly, and the longitudinal moving trolley and the longitudinal moving oil cylinder are connected through the oil cylinder connecting lug base. According to the device, the automatic position changing function of longitudinal moving and pushing of the bridge girder erection machine with the truss structure is achieved, continuous pushing in one direction can be achieved under the condition that pins are not replaced, returning can be achieved without obstacles, and the overall efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge erection machines, and in particular relates to an automatic transposition longitudinal movement device for a truss main beam bridge erection machine. Background Art

[0002] A bridge erection machine is a device that places prefabricated beams on prefabricated bridge piers. A bridge erection machine belongs to the category of cranes because its main function is to lift beams, transport them to the location, and then put them down. But it is very different from cranes in the general sense. It requires harsh conditions and has walking on beams, or longitudinal movement. At present, most bridge erection machines use cylinders for walking-type jacking and longitudinal movement. For bridge erection machines with truss main beams, the hanging longitudinal beam is set in the middle of the lower chord frame. In order to save costs, holes are usually drilled on the web of the hanging longitudinal beam to make it also serve as a longitudinal movement hole plate. The longitudinal movement trolley is suspended on the hanging longitudinal beam and connected to the web of the hanging longitudinal beam by a pin. This connection method requires manual pin replacement after each cylinder stroke, resulting in low work efficiency. If only one working pin is inserted, it is easy to cause deformation of the lower flange plate of the hanging longitudinal beam. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an automatic repositioning and longitudinal shifting device for a truss main beam bridge erecting machine, which effectively solves the problems existing in the prior art with respect to the truss main beam bridge erecting machine, in which the hanging longitudinal beam is arranged in the middle of the lower chord frame. In order to save costs, holes are usually drilled on the web of the hanging longitudinal beam so that it can also be used as a longitudinal shifting hole plate. The longitudinal shifting trolley is suspended on the hanging longitudinal beam and connected to the web of the hanging longitudinal beam by a pin. This connection method requires manual pin replacement after each cylinder stroke, resulting in low work efficiency. If only one working pin is inserted, it is also easy to cause the problem of deformation of the lower flange plate of the hanging longitudinal beam.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic position-changing and longitudinal shifting device for a truss main beam bridge erecting machine, comprising a truss main beam, a leg mechanism, a longitudinal shifting cylinder, a hanging longitudinal beam and a longitudinal shifting trolley; the longitudinal shifting trolley comprises an intermediate ear seat assembly, a reverse buckle assembly, a connecting shaft, a swinging working block, a limit latch and an oil cylinder connecting ear seat; the reverse buckle assemblies are respectively arranged on both sides of the intermediate ear seat assembly, and the intermediate ear seat assembly and the two reverse buckle assemblies are connected by bolts and then suspended on the hanging longitudinal beam; the swinging working block is assembled in the middle gap of the intermediate ear seat assembly through the connecting shaft, and a cylinder connecting ear seat is arranged on one side of the intermediate ear seat assembly, and the longitudinal shifting trolley and the longitudinal shifting cylinder are connected through the oil cylinder connecting ear seat.

[0005] Preferably, the hanging longitudinal beam includes a sliding channel steel, a lower flange reinforcement plate and a limiting protrusion. The lower flange reinforcement plate and the limiting protrusion are positioned and welded at equal intervals on the lower surfaces of the lower flanges of the two sliding channel steels, and the limiting protrusion protrudes from the lower surface of the lower flange reinforcement plate.

[0006] Preferably, the distance between two adjacent limiting protrusions is smaller than the working stroke of the longitudinal movement cylinder.

[0007] Preferably, the intermediate ear seat assembly is provided with a first through hole and a second through hole, a first positioning pin hole and a second positioning pin hole, and the specifications of the first positioning pin hole, the second positioning pin hole and the limit pin correspond to each other; the reverse buckle assembly is provided with a third through hole, the connecting shaft is provided with two third positioning pin holes, and the swing working block is provided with a fourth through hole, and the connecting shaft passes through the first through hole, the third through hole and the fourth through hole.

[0008] Preferably, the buckle assembly includes a connecting shaft end cover and a clamping block, and when the longitudinal movement trolley is hung on the hanging longitudinal beam, the clamping block is engaged with the sliding channel steel.

[0009] Preferably, there is the following relationship between the width dimension a of the second through hole and the width dimension b of the swing working block: a>b.

[0010] Preferably, the swing working block is in an elongated strip shape, and has a larger deadweight below the fourth through hole. Limiting protrusion contact sections are provided on both sides of the top of the swing working block, and an arc surface is provided at the lower part of the limiting protrusion contact section.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides an automatic position-changing and longitudinal shifting device for a truss main beam bridge erecting machine, which arranges lower flange reinforcement plates and limiting protrusions at evenly spaced intervals on the lower flange of the hanging longitudinal beam of the truss main beam of the bridge erecting machine, without affecting the working space of the hanger. On the one hand, it can strengthen the lower flange of the hanging longitudinal beam, and on the other hand, it can provide a force point for the longitudinal shifting trolley. Then, the existing longitudinal shifting trolley is improved and optimized and used for the truss structure bridge erecting machine, realizing the automatic position-changing function of the longitudinal shifting and pushing of the truss structure bridge erecting machine. Without changing the pin, it can be continuously pushed in one direction and can return without obstacle, and the overall efficiency is relatively high.

[0012] The utility model cooperates with the limit protrusion, the swing working block and the limit latch, when the longitudinal movement cylinder is extended to make the swing working block contact with the limit protrusion, the limit latch in the first positioning pin hole limits the turning of the swing working block, so that the swing working block cannot rotate counterclockwise, and the swing working block can only support the limit protrusion. At this time, the forward thrust of the longitudinal movement trolley can be transmitted to the limit protrusion through the swing working block, thereby pushing the hanging longitudinal beam to drive the main girders of the bridge erecting machine to move forward. When the longitudinal movement cylinder is retracted, when the truss main beam is fixed, the longitudinal movement trolley moves backward, and when the swing working block contacts with the limit protrusion, the limit latch in the first positioning pin hole cannot limit the rotation of the swing working block, and the swing working block rotates clockwise, so that when the longitudinal movement cylinder is retracted, the swing working block can smoothly pass through the limit protrusion. After the swing working block passes through the limit protrusion, the swing working block is reset by the self-weight structure of the swing working block, thereby improving the reliability of the device.

[0013] In special circumstances, the limit pin of the device can be placed in the second positioning pin hole. When the longitudinal cylinder is extended or retracted, it can pass through the limit protrusion unimpeded. When the longitudinal cylinder is retracted, the hanging longitudinal beam is pushed to drive the main girders of the bridge erecting machine to move backward, thereby improving the versatility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the utility model in which the longitudinal moving trolley pushes the truss main beam to move when the longitudinal moving oil cylinder is extended;

[0016] Figure 3 It is a structural schematic diagram of the longitudinal movement trolley passing through the limiting protrusion when the longitudinal movement cylinder is contracted in the utility model;

[0017] Figure 4 It is a structural schematic diagram of the hanging longitudinal beam of the utility model;

[0018] Figure 5 The utility model Figure 4 Left view of

[0019] Figure 6 It is a structural schematic diagram of the longitudinal shifting trolley of the utility model;

[0020] Figure 7 The utility model Figure 6 A cross-sectional view of

[0021] Figure 8 It is a schematic diagram of the connection between the intermediate ear seat assembly and the oil cylinder connecting ear seat of the utility model;

[0022] Fig. 9It is a structural schematic diagram of the middle ear seat assembly of the utility model;

[0023] Fig.10 It is a structural schematic diagram of the reverse buckle assembly of the utility model;

[0024] Fig.11 It is a structural schematic diagram of the swing working block of the utility model.

[0025] In the figure: 100, hanging longitudinal beam; 110, sliding channel steel; 120, lower flange reinforcement plate; 130, limiting protrusion; 200, longitudinal movement trolley; 210, intermediate ear seat assembly; 211, first through hole; 212, second through hole; 213, first positioning pin hole; 214, second positioning pin hole; 220, reverse buckle assembly; 221, connecting shaft end cover; 222, clamping block; 223, third through hole; 230, connecting shaft; 231, third positioning pin hole; 240, swing working block; 241, fourth through hole; 242, limiting protrusion contact section; 243, arc surface; 250, limiting pin; 260, cylinder connecting ear seat. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be pointed out that the terms "upper", "lower", "left", "right", "top", "bottom", "inside", "outside" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0028] It should be understood that, in the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect" and "connect" should be understood in a broad sense.

[0029] Example 1

[0030] See attached Figures 1 to 11 The present embodiment provides an automatic transposition and longitudinal shifting device for a truss main beam bridge erecting machine, comprising a truss main beam, a leg mechanism, a longitudinal shifting cylinder, a hanging longitudinal beam 100 and a longitudinal shifting trolley 200.

[0031] The hanging longitudinal beam 100 includes a sliding channel steel 110, a lower flange reinforcement plate 120 and a limiting protrusion 130. The lower flange reinforcement plate 120 and the limiting protrusion 130 are positioned and welded at equal intervals on the lower surface of the lower flange of the two sliding channel steels 110. The limiting protrusion 130 protrudes from the lower surface of the lower flange reinforcement plate 120. The lower flange reinforcement plate 120 can increase the strength of the lower surface of the lower flange of the sliding channel steel 110 without affecting the suspension rod space between the two sliding channel steels 110. The spacing between two adjacent limiting protrusions 130 is smaller than the working stroke of the longitudinal cylinder.

[0032] The longitudinal movement trolley 200 includes an intermediate ear seat assembly 210 , a buckle assembly 220 , a connecting shaft 230 , a swing working block 240 , a limit latch 250 and a cylinder connecting ear seat 260 .

[0033] The middle ear seat assembly 210 is provided with reverse buckle assemblies 220 on both sides respectively. The middle ear seat assembly 210 and the two reverse buckle assemblies 220 are connected by bolts and then hung on the hanging longitudinal beam 100 and can slide along the hanging longitudinal beam 100 .

[0034] The swing working block 240 is assembled in the middle gap of the middle ear seat assembly 210 through the connecting shaft 230. A cylinder connecting ear seat 260 is provided on one side of the middle ear seat assembly 210, and the longitudinal movement trolley 200 and the longitudinal movement cylinder are connected through the cylinder connecting ear seat 260.

[0035] The middle ear seat assembly 210 is provided with a first through hole 211 and a second through hole 212, a first locating pin hole 213 and a second locating pin hole 214, and the specifications of the first locating pin hole 213, the second locating pin hole 214 and the limit pin 250 correspond to each other; the reverse buckle assembly 220 is provided with a third through hole 223, the connecting shaft 230 is provided with two third locating pin holes 231, and the swing working block 240 is provided with a fourth through hole 241. The connecting shaft 230 passes through the first through hole 211, the third through hole 223 and the fourth through hole 241, and a locating pin (not shown in the figure) is installed in the third locating pin hole 231 to realize the connection of the longitudinal movement trolley 200. The first locating pin hole 213, the second locating pin hole 214 and the third locating pin hole 231 are all non-through through holes.

[0036] The buckle assembly 220 includes a connecting shaft end cover 221 and a clamping block 222. When the longitudinal moving trolley 200 is hung on the hanging longitudinal beam 100, the clamping block 222 engages with the sliding channel steel 110, and the connecting shaft end cover 221 protects the connecting shaft 230 to prevent the connecting shaft 230 from being directly hit.

[0037] The width dimension a of the second through hole 212 and the width dimension b of the swinging working block 240 have the following relationship: a>b. The swinging working block 240 is in the shape of an elongated strip, and the weight of the portion below the fourth through hole 241 is relatively large, and it can automatically maintain a vertical state under the action of gravity. The two side surfaces of the top of the swinging working block 240 are provided with a limited position protrusion contact section 242, and the lower part of the limited position protrusion contact section 242 is provided with an arc surface 243, and the weight of the top of the swinging working block 240 is reduced as much as possible by the provision of the arc surface.

[0038] The automatic repositioning and longitudinal shifting device for a truss main beam bridge erecting machine described in this embodiment has the following specific usage process: the intermediate ear seat assembly 210 is connected to the swing working block 240 through the connecting shaft 230, and the intermediate ear seat assembly 210 is further connected to the reverse buckle assemblies 220 on both sides, so that the reverse buckle assembly 220 is hung on the sliding channel steel 110, so that the clamping block 222 is engaged with the sliding channel steel 110, and the cylinder connecting ear seat 260 on one side of the intermediate ear seat assembly 210 is connected to the longitudinal shifting cylinder, and the longitudinal shifting cylinder is connected to the support leg structure (the support leg structure is fixed to the foundation).

[0039] like Figure 2 As shown, if it is necessary to push the main girder of the bridge erection machine forward (right arrow in the figure), the limit pin 250 is inserted into the first positioning pin hole 213 to extend and retract the longitudinal movement cylinder. Since the working stroke of the longitudinal movement cylinder is greater than the spacing between the two adjacent limit protrusions 130, the swing working block 240 must contact the limit protrusion 130. The limit protrusion contact 241 on the side of the swing working block 240 away from the connecting ear seat 260 first contacts the limit protrusion 130. The swing working block 240 tends to rotate counterclockwise, but the limit pin 250 in the first positioning pin hole 213 limits the turning direction of the swing working block 240, so that the swing working block 240 cannot rotate counterclockwise, and the swing working block 240 can only support the limit protrusion 130. At this time, the forward thrust of the longitudinal movement trolley 200 can be transmitted to the limit protrusion 130 through the swing working block 240, thereby pushing the hanging longitudinal beam 100 to drive the main girder of the bridge erection machine to move forward.

[0040] like Figure 3As shown, when the longitudinal shift cylinder contracts and the truss main beam is fixed, the longitudinal shift trolley 200 drives the hanging longitudinal beam 100 to move backward. Since the working stroke of the longitudinal shift cylinder is greater than the spacing between the two adjacent limit protrusions 130, the limit protrusion contact 241 on the side of the swing working block 240 close to the connecting ear seat 260 first contacts the limit protrusion 130. At this time, the limit pin 250 in the first locating pin hole 213 cannot limit the rotation of the swing working block 240, and the swing working block 240 rotates clockwise, and the swing working block 240 can smoothly pass through the limit protrusion 130. When the swing working block 240 completely passes the limit protrusion 130, the swing working block 240 can return to the vertical state under the action of its own weight, thereby improving the reliability of the device. Then the longitudinal shift cylinder pushes forward again, and the longitudinal shift trolley 200 can push the hanging longitudinal beam 100 again to drive the main girder of the bridge erection machine to move forward. There is no need to manually change pins during the whole process, and the work efficiency is high.

[0041] It is not difficult to understand that, under special circumstances, the limit pin 250 of the device can be placed in the second positioning pin hole 213. When the longitudinal cylinder is extended and retracted, it can pass through the limit protrusion without hindrance. When the longitudinal cylinder is retracted, the hanging longitudinal beam 100 is pushed to drive the main girders of the bridge erecting machine to move backward, thereby improving the versatility of the device.

[0042] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. An automatic transposition and longitudinal movement device for a truss main beam bridge erecting machine, comprising a truss main beam, a leg mechanism and a longitudinal movement cylinder, characterized in that: It also includes a hanging longitudinal beam (100) and a longitudinal moving trolley (200); The longitudinal transfer trolley (200) comprises an intermediate ear seat assembly (210), a buckle assembly (220), a connecting shaft (230), a swing working block (240), a limit latch (250) and a cylinder connecting ear seat (260); The reverse buckle components (220) are respectively arranged on both sides of the intermediate ear seat component (210); the intermediate ear seat component (210) and the two reverse buckle components (220) are connected by bolts and then hung on the hanging longitudinal beam (100); The swing working block (240) is assembled in the middle gap of the intermediate ear seat assembly (210) via the connecting shaft (230); a cylinder connecting ear seat (260) is provided on one side of the intermediate ear seat assembly (210); and the longitudinal movement trolley (200) and the longitudinal movement cylinder are connected via the cylinder connecting ear seat (260).

2. The automatic transposition and longitudinal shifting device for a truss main beam bridge erecting machine according to claim 1 is characterized in that: The hanging longitudinal beam (100) comprises a sliding channel steel (110), a lower flange reinforcement plate (120) and a limiting protrusion (130); the lower flange reinforcement plate (120) and the limiting protrusion (130) are positioned and welded at equal intervals on the lower surfaces of the lower flanges of the two sliding channel steels (110); and the limiting protrusion (130) protrudes from the lower surface of the lower flange reinforcement plate (120).

3. The automatic transposition and longitudinal shifting device for a truss main beam bridge erecting machine according to claim 2 is characterized in that: The distance between two adjacent limiting protrusions (130) is smaller than the working stroke of the longitudinal movement cylinder.

4. The automatic transposition and longitudinal shifting device for a truss main beam bridge erecting machine according to claim 2 is characterized in that: The intermediate ear seat assembly (210) is provided with a first through hole (211) and a second through hole (212), a first positioning pin hole (213) and a second positioning pin hole (214), and the specifications of the first positioning pin hole (213), the second positioning pin hole (214) and the limit pin (250) correspond to each other; the reverse buckle assembly (220) is provided with a third through hole (223), the connecting shaft (230) is provided with two third positioning pin holes (231), the swing working block (240) is provided with a fourth through hole (241), and the connecting shaft (230) passes through the first through hole (211), the third through hole (223) and the fourth through hole (241).

5. The automatic transposition and longitudinal shifting device for a truss main beam bridge erecting machine according to claim 2 is characterized in that: The buckle assembly (220) comprises a connecting shaft end cover (221) and a clamping block (222). When the longitudinal movement trolley (200) is hung on the hanging longitudinal beam (100), the clamping block (222) is engaged with the sliding channel steel (110).

6. The automatic transposition and longitudinal shifting device for a truss main beam bridge erecting machine according to claim 4, characterized in that: The width dimension a of the second through hole (212) and the width dimension b of the swing working block (240) are in the following relationship: a>b.

7. The automatic transposition and longitudinal shifting device for a truss main beam bridge erecting machine according to claim 4 is characterized in that: The swing working block (240) is in the shape of an elongated strip, and the deadweight of the portion below the fourth through hole (241) is relatively large. The top two side surfaces of the swing working block (240) are provided with limiting convex contact sections (242), and the lower portion of the limiting convex contact section (242) is provided with an arc surface (243).

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