Prefabricated box girder lifting appliance

Abstract

The utility model discloses a prefabricated box girder lifting appliance, and relates to the technical field of prefabricated box girder installation, the prefabricated box girder lifting appliance comprises a main lifting appliance, a steel rope hanging device and two auxiliary lifting appliances, each auxiliary lifting appliance comprises a fixing plate, an extension plate installed on one side of the fixing plate, a screw rod rotationally connected to the extension plate and a first hand wheel installed on the top of the screw rod; a sliding groove is formed in the bottom of the main lifting appliance, a guide rod is fixedly connected into the sliding groove, a double-thread lead screw is rotationally connected into the sliding groove, and a driving assembly used for driving the double-thread lead screw to rotate is installed on the main lifting appliance. And sliding plates are arranged at the tops of the two auxiliary lifting appliances, the two sliding plates are slidably connected to the two ends of a guide rod correspondingly, and the two sliding plates are in threaded connection to the two ends of a double-thread lead screw correspondingly. According to the lifting appliance, the distance between the two auxiliary lifting appliances can be conveniently adjusted.

Description

Technical Field

[0001] The present application relates to the technical field of prefabricated box girder installation, and in particular to a prefabricated box girder hanger. Background Art

[0002] At present, prefabricated box girders are used in bridge projects. The basic structure of prefabricated box girders includes a prefabricated pedestal at the bottom and a box girder top plate at the top. During bridge construction, lifting equipment is required to lift the box girder and place it on the piers.

[0003] Related technology can refer to the Chinese utility model patent with authorization announcement number CN205257769U, which discloses a prefabricated box girder hoist, including a main hoist, and steel rope hanging devices are respectively arranged at the bottom of both ends of the main hoist. Two auxiliary hoists are arranged at the bottom of the main hoist, and the auxiliary hoists are located between the steel rope hanging devices. The auxiliary hoist includes a connecting rod connected to the box girder, and the axial direction of the connecting rod is vertically arranged.

[0004] However, it is inconvenient to adjust the distance between the two auxiliary hangers, so when the position of the mounting holes on the box beam is slightly deviated, it is inconvenient to connect the connecting rod to the box beam. Utility Model Content

[0005] The present application provides a prefabricated box beam hanger, which is convenient for adjusting the distance between two auxiliary hangers, and adopts the following technical solution:

[0006] A prefabricated box girder hanger, comprising a main hanger, a steel rope hanging device and two auxiliary hangers, the auxiliary hanger comprising a fixed plate, an extension plate installed on one side of the fixed plate, a screw rod rotatably connected to the extension plate and a first hand wheel installed on the top of the screw rod, a slide groove is provided at the bottom of the main hanger, a guide rod is fixedly connected in the slide groove and a double-threaded lead screw is rotatably connected, and a driving assembly for driving the double-threaded lead screw to rotate is installed on the main hanger; slide plates are provided on the tops of the two auxiliary hangers, the two slide plates are respectively slidably connected to the two ends of the guide rod, and the two slide plates are respectively threadedly connected to the two ends of the double-threaded lead screw.

[0007] Preferably, the driving assembly includes a vertical shaft rotatably connected to the top wall of the slide groove and a second hand wheel installed on the top of the vertical shaft; a first bevel gear is fixed to the bottom of the vertical shaft, and a second bevel gear is fixed to the side wall of the double-threaded screw, and the first bevel gear is meshed with the second bevel gear.

[0008] Preferably, both end side walls of the slide groove are equipped with supporting mechanisms for supporting the guide rod.

[0009] Preferably, the supporting mechanism includes a through hole opened in the side wall of one end of the slide groove, a vertical rod connected to the through hole along the vertical sliding direction, and a supporting plate fixed to the bottom of the vertical rod; the supporting plate abuts against the bottom of one end of the guide rod; a buffer plate is sleeved on the top of the vertical rod, and a plurality of springs are fixed to the bottom of the buffer plate, and one end of the spring away from the buffer plate is fixed to the top of the main hanger; one end of the vertical rod away from the support plate passes through the buffer plate and is threadedly connected to a limiting nut.

[0010] Preferably, a threaded rod is fixedly connected to the bottom of the vertical rod, a threaded hole is formed on the top of the support plate, and the threaded rod is threadedly connected to the threaded hole.

[0011] Preferably, an extension rod is fixedly connected to the top of the extension plate, a vertical groove for sliding movement of the extension rod is formed at the bottom of the fixed plate, and a limiting member for limiting the extension rod is installed on the side wall of the vertical groove.

[0012] Preferably, the limiting member comprises a limiting bolt threadedly connected to the side wall of the vertical slot, a side of the extension rod close to the limiting bolt is vertically provided with a plurality of insertion holes in sequence, and one end of the limiting bolt is inserted into the insertion hole.

[0013] In summary, this application has the following beneficial effects:

[0014] 1. When the distance between the two auxiliary spreaders needs to be adjusted, the double-threaded lead screw is first driven by the driving assembly to rotate, and the double-threaded lead screw drives the two auxiliary spreaders to move toward or away from each other, so that the distance between the two auxiliary spreaders can be adjusted; In summary, by adopting the above scheme, it is convenient to adjust the distance between the two auxiliary spreaders;

[0015] 2. When the double-threaded lead screw needs to be driven to rotate, the second hand wheel is used to drive the vertical shaft to rotate, the vertical shaft rotation drives the first bevel gear to rotate, the first bevel gear rotation drives the second bevel gear to rotate, and the second bevel gear rotation can drive the double-threaded lead screw to rotate; the drive assembly is provided to facilitate driving the double-threaded lead screw to rotate;

[0016] 3. When the length of the auxiliary hanger is not enough, first release the limit on the extension rod through the limiter, and then move the extension plate to adjust the length of the auxiliary hanger. When the length of the auxiliary hanger is adjusted to a suitable position, limit the extension rod through the limiter, so that the length of the auxiliary hanger can be adjusted, which makes it easier to connect the screw rod to the box beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0018] Figure 2 This is a schematic diagram of the structure of the support mechanism used to display the embodiment of the present application;

[0019] Figure 3 This is a cross-sectional view used to show the threaded rod and the threaded hole in the embodiment of the present application;

[0020] Figure 4 It is a cross-sectional view used to show the internal structure of the fixing plate in the embodiment of the present application.

[0021] Explanation of the reference numerals in the accompanying drawings: 1. Main hoist; 11. Slide; 12. Guide rod; 13. Double-threaded screw; 2. Auxiliary hoist; 21. Fixed plate; 211. Vertical groove; 22. Extension plate; 23. Screw; 24. First hand wheel; 25. Slide plate; 26. Extension rod; 261. Socket; 3. Drive assembly; 31. Vertical shaft; 32. Second hand wheel; 33. First bevel gear; 34. Second bevel gear; 4. Support mechanism; 41. Through hole; 42. Vertical rod; 421. Threaded rod; 43. Support plate; 431. Threaded hole; 44. Buffer plate; 45. Spring; 46. Limit nut; 5. Limit bolt. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-4 This application is described in further detail.

[0023] The same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper", "lower", "bottom" and "top" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0024] The present application discloses a prefabricated box girder hanger, comprising a main hanger 1, a steel rope hanging device and two auxiliary hangers 2, the auxiliary hangers 2 comprising a fixed plate 21, an extension plate 22 installed on one side of the fixed plate 21, a screw rod 23 vertically rotatably connected to the extension plate 22 through a bearing, and a first hand wheel 24 installed on the top of the screw rod 23, a slide groove 11 is provided at the bottom of the main hanger 1, a guide rod 12 is horizontally fixed in the slide groove 11 and a double-threaded lead screw 13 is horizontally rotatably connected through a bearing, and a driving component 3 for driving the double-threaded lead screw 13 to rotate is installed on the main hanger 1; slide plates 25 are provided on the tops of the two auxiliary hangers 2, the two slide plates 25 are respectively slidably connected to the two ends of the guide rod 12, and the two slide plates 25 are respectively threadedly connected to the two ends of the double-threaded lead screw 13. When the distance between the two auxiliary hangers 2 needs to be adjusted, the double-threaded screw 13 is first driven to rotate by the driving assembly 3, and the double-threaded screw 13 rotates to drive the two auxiliary hangers 2 to move toward or away from each other, so that the distance between the two auxiliary hangers 2 can be adjusted; in summary, by adopting the above scheme, it is convenient to adjust the distance between the two auxiliary hangers 2.

[0025] The driving assembly 3 includes a vertical shaft 31 connected to the top wall of the slide slot 11 through a bearing and a second hand wheel 32 installed on the top of the vertical shaft 31; a first bevel gear 33 is fixed to the bottom of the vertical shaft 31, and a second bevel gear 34 is fixed to the side wall of the double-threaded lead screw 13, and the first bevel gear 33 is meshed with the second bevel gear 34. When the double-threaded lead screw 13 needs to be driven to rotate, the vertical shaft 31 is first driven to rotate by the second hand wheel 32, and the rotation of the vertical shaft 31 drives the first bevel gear 33 to rotate, and the rotation of the first bevel gear 33 drives the second bevel gear 34 to rotate, and the rotation of the second bevel gear 34 can drive the double-threaded lead screw 13 to rotate; the driving assembly 3 is provided to facilitate driving the double-threaded lead screw 13 to rotate.

[0026] Support mechanisms 4 for supporting the guide rods 12 are installed on both end side walls of the slide groove 11 .

[0027] The support mechanism 4 includes a through hole 41 vertically opened on the side wall of one end of the slide slot 11, a vertical rod 42 vertically slidably connected to the through hole 41, and a support plate 43 fixed to the bottom of the vertical rod 42; the support plate 43 abuts against the bottom of one end of the guide rod 12; a buffer plate 44 is sleeved on the top of the vertical rod 42, and a plurality of springs 45 are vertically fixed to the bottom of the buffer plate 44, and one end of the spring 45 away from the buffer plate 44 is fixed to the top of the main hanger 1; one end of the vertical rod 42 away from the support plate 43 penetrates the buffer plate 44 and is threadedly connected to a limit nut 46. The support plate 43, the buffer plate 44 and the spring 45 are provided to facilitate supporting the guide rod 12.

[0028] The bottom of the vertical rod 42 is fixed with a threaded rod 421, and the top of the support plate 43 is provided with a threaded hole 431, and the threaded rod 421 is threadedly connected to the threaded hole 431. The threaded rod 421 and the threaded hole 431 are provided to facilitate the connection between the vertical rod 42 and the support plate 43.

[0029] The top of the extension plate 22 is fixed with an extension rod 26, and the bottom of the fixed plate 21 is provided with a vertical slot 211 for the extension rod 26 to slide vertically, and the side wall of the vertical slot 211 is installed with a limiter for limiting the extension rod 26. When the length of the auxiliary hanger 2 is not enough, the limiter is first used to release the limit of the extension rod 26, and then the extension plate 22 is moved to adjust the length of the auxiliary hanger 2. When the length of the auxiliary hanger 2 is adjusted to a suitable position, the limiter is used to limit the extension rod 26, so that the length of the auxiliary hanger 2 can be adjusted, and then the screw rod 23 is connected to the box beam.

[0030] The limiting member includes a limiting bolt 5 threadedly connected to the side wall of the vertical slot 211, and a plurality of insertion holes 261 are vertically provided on one side of the extension rod 26 close to the limiting bolt 5, and one end of the limiting bolt 5 is inserted into the insertion hole 261. The setting of the limiting bolt 5 and the insertion hole 261 facilitates the limiting of the extension rod 26.

[0031] Working principle: when the distance between the two auxiliary hangers 2 needs to be adjusted, first drive the vertical shaft 31 to rotate through the second hand wheel 32, the vertical shaft 31 rotates to drive the first bevel gear 33 to rotate, the first bevel gear 33 rotates to drive the second bevel gear 34 to rotate, the second bevel gear 34 rotates to drive the double-threaded screw 13 to rotate, the double-threaded screw 13 rotates to drive the two auxiliary hangers 2 to move toward or away from each other, so that the distance between the two auxiliary hangers 2 can be adjusted; in summary, by adopting the above scheme, it is convenient to adjust the distance between the two auxiliary hangers 2.

[0032] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A prefabricated box girder hanger, comprising a main hanger (1), a steel rope hanging device and two auxiliary hangers (2), wherein the auxiliary hanger (2) comprises a fixed plate (21), an extension plate (22) mounted on one side of the fixed plate (21), a screw rod (23) rotatably connected to the extension plate (22) and a first hand wheel (24) mounted on the top of the screw rod (23), characterized in that: The bottom of the main hanger (1) is provided with a slide groove (11), a guide rod (12) is fixedly connected to the slide groove (11) and a double-threaded lead screw (13) is rotatably connected thereto, and a driving component (3) for driving the double-threaded lead screw (13) to rotate is installed on the main hanger (1); the tops of the two auxiliary hangers (2) are each provided with a slide plate (25), the two slide plates (25) are respectively slidably connected to the two ends of the guide rod (12), and the two slide plates (25) are respectively threadedly connected to the two ends of the double-threaded lead screw (13).

2. The prefabricated box beam hanger according to claim 1, characterized in that: The driving assembly (3) comprises a vertical shaft (31) rotatably connected to the top wall of the slide groove (11) and a second hand wheel (32) mounted on the top of the vertical shaft (31); a first bevel gear (33) is fixedly connected to the bottom of the vertical shaft (31), and a second bevel gear (34) is sleeved and fixed on the side wall of the double-threaded lead screw (13), and the first bevel gear (33) is meshed with the second bevel gear (34).

3. The prefabricated box beam hanger according to claim 1, characterized in that: An extension rod (26) is fixedly connected to the top of the extension plate (22), a vertical groove (211) for the extension rod (26) to slide is provided at the bottom of the fixed plate (21), and a limiting member for limiting the extension rod (26) is installed on the side wall of the vertical groove (211).

4. The prefabricated box beam hanger according to claim 3, characterized in that: The limiting member comprises a limiting bolt (5) threadedly connected to the side wall of the vertical slot (211); a side of the extension rod (26) close to the limiting bolt (5) is vertically provided with a plurality of insertion holes (261) in sequence; one end of the limiting bolt (5) is inserted into the insertion hole (261).

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