CN218911139U - Landing leg mechanism of bridge girder erection machine - Google Patents

Abstract

The utility model relates to a landing leg mechanism of a bridge girder erection machine, which comprises a lattice type telescopic upright post assembly, a positioning piece detachably mounted on the telescopic upright post assembly and a telescopic driver detachably mounted on the telescopic upright post assembly. The telescopic driver can drive the telescopic upright post assembly to extend and retract, and the locating piece can locate the extension and the retraction of the telescopic upright post assembly. The supporting leg mechanism has the beneficial effects that the supporting leg mechanism can realize large height difference adjustment, is wider in application range, light in structure, better in supporting effect and higher in stability.

Description

Landing leg mechanism of bridge girder erection machine

Technical Field

The utility model relates to the technical field of bridge construction equipment, in particular to a landing leg mechanism of a bridge girder erection machine.

Background

At present, along with the continuous acceleration of urban construction in China and the continuous perfection of traffic in China, various bridge facilities are continuously constructed, and bridge erecting machines are generated, namely equipment for placing prefabricated beam sheets on prefabricated piers, and the main function of the bridge erecting machines is to lift the beam sheets, then convey the beam sheets to positions and then put the beam sheets down, so that the bridge erecting machines belong to the category of cranes.

However, along with the continuous progress of bridge construction in China, the requirements on bridge girder erection machines are continuously improved, the supporting leg mechanisms of the bridge girder erection machines are used as supporting structures of the bridge girder erection machines and are continuously optimized accordingly, the supporting leg mechanisms of the bridge girder erection machines are important component parts of the bridge girder erection machines, the bridge girder erection machines can be effectively lifted or lowered, the supporting leg mechanisms of the existing bridge girder erection machines are mostly suitable for lower piers, and for the ultrahigh supporting legs arranged on higher piers, due to stability, the supporting effect is often poor, and meanwhile, the dead weight of the traditional supporting leg structures is large, so that the construction is inconvenient.

Therefore, there is a need for a leg mechanism of a bridge girder erection machine with wide application range, good supporting effect and light structure.

Disclosure of Invention

First, the technical problem to be solved

In view of the above-mentioned shortcomings and disadvantages of the prior art, the present utility model provides a leg support mechanism of a bridge girder erection machine, which solves the technical problems of narrow application range, poor support effect and heavy weight of the prior art.

(II) technical scheme

In order to achieve the above purpose, the main technical scheme adopted by the utility model comprises the following steps:

the utility model provides a landing leg mechanism of a bridge girder erection machine, which comprises a lattice type telescopic column assembly, a positioning piece detachably arranged on the telescopic column assembly and a telescopic driver detachably arranged on the telescopic column assembly. The telescopic driver can drive the telescopic upright post assembly to extend and retract, and the locating piece can locate the extension and the retraction of the telescopic upright post assembly.

Optionally, the telescopic column assembly comprises a plurality of columns which are sequentially sleeved in a sliding manner up and down, and the column above is sleeved in the column below the telescopic column assembly. In two adjacent stands, telescopic drive can detachably install the lower extreme at the stand that is located the top to drive the stand that is located the top and slide from top to bottom. The locating piece is detachably arranged on the upper portion of the upright post positioned below, and can locate the sliding position of the upright post positioned above.

Optionally, the plurality of posts includes a first post, a second post, and a third post. The second stand column can be sleeved in the first stand column in a vertical sliding mode, and the third stand column can be sleeved in the second stand column in a vertical sliding mode. The telescoping drivers include a first telescoping driver and a second telescoping driver. The first telescopic drive can be detachably mounted below the second upright, and the second telescopic drive can be detachably mounted below the third upright. The positioning piece comprises a first positioning piece and a second positioning piece. The first positioning piece is detachably mounted on the upper portion of the first upright post, and the second positioning piece is detachably mounted on the upper portion of the second upright post.

Optionally, the lengths of the plurality of columns decrease in sequence in a bottom-to-top direction.

Optionally, the plurality of posts are identical in structure and square in cross-sectional shape.

Optionally, the upright post is a cuboid structure formed by a plurality of limbs and a plurality of lacing bars. The limbs evenly encircle and arrange and form the cuboid frame of stand, adjacent the limb passes through a plurality of lacing bars are connected.

Optionally, the lacing bar comprises a transverse lacing bar and a cross lacing bar. The transverse and intersecting lacing bars are arranged alternately along the length of the limb.

Optionally, the limb piece adopts channel steel, I-steel, angle steel or steel pipe.

Optionally, the lacing bar adopts single angle steel.

(III) beneficial effects

The beneficial effects of the utility model are as follows:

according to the supporting leg mechanism of the bridge girder erection machine, through the latticed telescopic upright post assembly, the dead weight is reduced and the stability is improved on the basis of ensuring the supporting effect. The telescopic driver drives the telescopic column assembly to stretch and shrink, the height of the telescopic column assembly is positioned through the positioning piece, the installation position of the telescopic driver can be adjusted according to the telescopic degree of the telescopic column assembly, the telescopic driver with large telescopic stroke is not required to be adopted or customized, the telescopic adjustment of the telescopic column assembly can be realized through the telescopic driver with small telescopic stroke and the positioning piece, the cost can be reduced, the telescopic column assembly cannot be limited by the telescopic stroke of the telescopic driver, the higher stretching height can be achieved, and the large height difference adjustment is realized. Compared with the prior art, the landing leg mechanism can realize large height difference adjustment, is wider in application range, light in structure, better in supporting effect and higher in stability.

Drawings

FIG. 1 is a schematic view of a construction of a bridge girder erection machine according to an embodiment of the present utility model when a leg mechanism is fully extended;

fig. 2 is a schematic structural view of a leg mechanism of a bridge girder erection machine according to an embodiment of the present utility model when the leg mechanism is fully contracted.

[ reference numerals description ]

1: a telescopic column assembly; 11: a first upright; 12: a second upright; 13: a third upright; 14: a limb; 15: a lacing bar;

21: a first telescopic drive; 22: a second telescopic drive;

31: a first positioning member; 32: and a second positioning piece.

Detailed Description

In order that the above-described aspects may be better understood, exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art. Wherein references herein to azimuthal nouns such as "upper", "lower", "left", "right" are made with reference to the orientation of fig. 1.

As shown in fig. 1 and 2, the specific embodiment of the present utility model provides a supporting leg mechanism of a lattice type (a bar system structure formed by connecting section steel, steel pipes or combined section bars), which comprises a telescopic column assembly 1 of a lattice type, a positioning member detachably mounted on the telescopic column assembly 1, and a telescopic driver detachably mounted on the telescopic column assembly 1. The telescopic driver can drive the telescopic column assembly 1 to extend and retract, and the locating piece can locate the extension and retraction of the telescopic column assembly 1.

Specifically, the principle is that the self weight is reduced and the stability is improved on the basis of ensuring the supporting effect through the lattice type telescopic upright post assembly 1. The telescopic column assembly 1 is driven to stretch and shrink through the telescopic driver, the height of the telescopic column assembly 1 is positioned through the positioning piece, the installation position of the telescopic driver can be adjusted according to the telescopic degree of the telescopic column assembly 1, the telescopic driver with large telescopic stroke does not need to be adopted or customized, the telescopic driver with small telescopic stroke is matched with the positioning piece again, and the telescopic adjustment of the telescopic column assembly 1 can be realized, so that the cost can be reduced. Specifically, when the telescopic driver is lifted, the telescopic driver is mounted below the telescopic part of the telescopic column assembly 1, the power output end of the telescopic driver is abutted against the bottom of the telescopic part, the telescopic part is driven to lift to the stroke height of the telescopic driver by the telescopic driver, the telescopic part is positioned by the positioning piece, the power output end of the telescopic driver is retracted again, the mounting position of the telescopic driver is lifted, the power output end of the telescopic driver is abutted against the bottom of the telescopic part, and the operation is repeated, so that the telescopic column assembly 1 is driven to stretch. The telescopic column assembly 1 is driven to shrink through the telescopic driver, the power output end of the telescopic driver is extended to the maximum stroke, the telescopic driver is arranged below the telescopic part, the power output end of the telescopic driver is abutted to the lower part of the telescopic part, the limitation of the positioning piece on the telescopic part is relieved, the telescopic part is driven to descend through the power output end of the telescopic driver, after the stroke height of the telescopic driver is lowered, the telescopic part is positioned through the positioning piece, the installation position of the telescopic driver is lowered to the stroke height, the power output end of the telescopic driver is extended to the bottom of the telescopic part, and the operation is repeated, so that the telescopic column assembly 1 is driven to shrink. From this, flexible stand assembly 1 can not receive the restriction of flexible driver stroke, and then can reach higher extension height, realizes big difference in height and adjusts. Compared with the prior art, the landing leg mechanism can realize large height difference adjustment, is wider in application range, light in structure, better in supporting effect and higher in stability.

Further, as shown in fig. 1 and 2, the telescopic column assembly 1 includes a plurality of columns that are sequentially and slidably sleeved up and down in the up-down direction, and the column located above is sleeved in the column adjacent to the lower column. In two adjacent stands, telescopic drive can detachably install the lower extreme at the stand that is located the top to drive the stand that is located the top and slide from top to bottom. The locating piece is detachably arranged on the upper portion of the upright post positioned below, and can locate the sliding position of the upright post positioned above.

Specifically, the plurality of columns includes a first column 11, a second column 12, and a third column 13, the cross sections (transverse cross sections perpendicular to the vertical direction) of which are sequentially reduced in size, the second column 12 and the third column 13 serve as telescopic parts of the telescopic column assembly 1, the second column 12 is slidably sleeved in the first column 11 up and down, and the third column 13 is slidably sleeved in the second column 12 up and down. The height requirements of the bridge girder erection machine can be met through the first upright 11, the second upright 12 and the third upright 13. The telescopic drives comprise a first telescopic drive 21 and a second telescopic drive 22. The first telescopic driver 21 can be detachably installed below the second upright 12 to drive the second upright 12 to slide up and down along the first upright 11, and the second telescopic driver 22 can be detachably installed below the third upright 13 to drive the third upright 13 to slide up and down along the second upright 12. The positioning members include a first positioning member 31 and a second positioning member 32. The first positioning member 31 is detachably mounted on the upper portion of the first upright 11, and is capable of positioning the position of the second upright 12 that slides up and down, and the second positioning member 32 is detachably mounted on the upper portion of the second upright 12, and is capable of positioning the position of the third upright 13 that slides up and down.

Further, as shown in fig. 1 and 2, the lengths of the first, second and third columns 11, 12 and 13 decrease in order in the bottom-to-top direction. The first telescopic driver 21 and the second telescopic driver 22 are easily installed and removed. The first upright 11, the second upright 12 and the third upright 13 have the same structure, and the cross-sectional shapes of the three are square. Each column is a rectangular parallelepiped structure composed of a plurality of limbs (structures for supporting at the periphery) 14 and a plurality of battens (connecting bars arranged at a certain angle) 15. The plurality of limbs 14 are uniformly arranged around a rectangular parallelepiped frame forming a column, and adjacent limbs 14 are connected by a plurality of battens 15, in this embodiment 4 limbs 14. The lacing 15 includes transverse lacing and cross lacing. The transverse and cross lacing patterns alternate along the length of the limb 14. In this embodiment, the limb 14 is a channel steel, i-steel, angle steel or steel pipe, and the batten 15 is a single angle steel. Thereby, the support stability of the first pillar 11, the second pillar 12, and the third pillar 13 is improved.

Specifically, in this embodiment, the first telescopic driver 21 is a first hydraulic cylinder, the second telescopic driver 22 is a second hydraulic cylinder, the telescopic strokes of the first hydraulic cylinder and the second hydraulic cylinder are the same, and the number of the first hydraulic cylinder and the second hydraulic cylinder is 2-4, so as to ensure the lifting stability of the second upright 12 and the third upright 13. The first hydraulic cylinder can be detachably mounted on the limb 14 of the first upright 11 by means of a first mount at its bottom and the second hydraulic cylinder can be detachably mounted on the limb 14 of the second upright 12 by means of a second mount at its bottom. The first positioning piece 31 is a first positioning pin shaft, the second positioning piece 32 is a second positioning pin shaft, and the number of the first positioning pin shaft and the second positioning pin shaft is 4, so that the stability of the second upright 12 and the third upright 13 in positioning is ensured. Of the four limbs 14 of the first and second uprights 11 and 12, the upper left part of the two limbs 14 on the left and the upper right part of the two limbs 14 on the right are provided with first positioning holes. Of the four limbs 14 of the second and third uprights 12 and 13, the left side of the two limbs 14 on the left side and the right side of the two limbs 14 on the right side are uniformly provided with a plurality of second positioning holes extending along the length thereof according to the telescopic stroke of the first hydraulic cylinder. The first positioning holes can be in communication with each of the second positioning holes. The first positioning pin shaft is inserted into the first positioning hole of the first upright 11 and the corresponding second positioning hole of the second upright 12 to position the second upright 12, and the second positioning pin shaft is inserted into the first positioning hole of the second upright 12 and the corresponding second positioning hole of the third upright 13 to position the third upright 13. When the telescopic upright assembly 1 is completely contracted, the first positioning pin shaft is inserted into the first positioning hole of the first upright 11 and the second positioning hole positioned at the highest position on the second upright 12 to position the second upright 12, and the second positioning pin shaft is inserted into the first positioning hole of the second upright 12 and the second positioning hole positioned at the highest position on the third upright 13 to position the third upright 13.

The working process of the supporting leg mechanism of the bridge girder erection machine provided by the embodiment is divided into three conditions, namely, the first condition: the second upright 12 is raised first and the third upright 13 is raised as required, depending on the target height. If the target height is smaller than the maximum height that the second upright 12 can rise, the first mounting seat of the first hydraulic cylinder is mounted on the limb 14 of the first upright 11, the power output end of the first hydraulic cylinder is abutted against the bottom of the second upright 12, the first positioning pin is removed, the second upright 12 is driven by the first hydraulic cylinder to rise to the maximum travel height of the first hydraulic cylinder, the first positioning hole of the first upright 11 and the corresponding second positioning hole on the second upright 12 are inserted through the first positioning pin, the second upright 12 is positioned, the power output end of the first hydraulic cylinder is completely contracted, the position of the first mounting seat is moved upwards along the first upright 11 to the bottom of the second upright 12, the operation steps are repeated until the top of the second upright 12 reaches the target height, and the second upright 12 is positioned through the first positioning pin. If the target height is larger than the maximum height that the second upright 12 can be lifted, the second upright 12 is lifted to the maximum height, and then the top of the third upright 13 is driven to be lifted to the target height and positioned through the second hydraulic cylinder and the second positioning pin shaft. When the hydraulic cylinder is contracted, the power output end of the second hydraulic cylinder is firstly extended to the maximum stroke, then the second hydraulic cylinder is arranged on the limb piece 14 of the second upright post 12, the power output end of the second hydraulic cylinder is abutted against the bottom of the third upright post 13, the second positioning pin is removed, the third upright post 13 is driven to descend to the position where the second hydraulic cylinder is completely contracted by contraction of the second hydraulic cylinder, the third upright post 13 is positioned by the second positioning pin, the position of the first mounting seat is moved downwards along the first upright post 11, the power output end of the second hydraulic cylinder is extended to the maximum stroke, the power output end of the second hydraulic cylinder is abutted against the bottom of the third upright post 13, and the operation steps are repeated until the third upright post 13 descends to be completely contracted into the second upright post 12, and the third upright post 13 is positioned by the second positioning pin. Likewise, the second upright 12 is lowered and fully retracted into the first upright 11 and positioned by the first hydraulic cylinder and the first positioning pin.

Second kind: according to the target height, the third upright 13 is raised first, and the second upright 12 is raised as required. If the target height is smaller than the maximum height that the third upright 13 can be lifted, the top of the third upright 13 is lifted to the target height and positioned through the second hydraulic cylinder and the second positioning pin shaft. If the target height is larger than the maximum height that the third upright 13 can be lifted, after the third upright 13 is lifted to the maximum height, the top of the second upright 12 is driven to be lifted to the target height and positioned through the first hydraulic cylinder and the first positioning pin shaft. When the first hydraulic cylinder and the first positioning pin shaft are retracted, the second upright post 12 is lowered and fully retracted into the first upright post 11 for positioning. The third upright 13 is then lowered by the second hydraulic cylinder and the second positioning pin, fully retracted into the second upright 12 and positioned.

Third kind: according to the target height, the second upright 12 and the third upright 13 rise synchronously, and the total height of the second upright 12 driven by the first hydraulic cylinder and the total height of the third upright 13 driven by the second hydraulic cylinder are the same, namely half of the target height. When shrinking, the second upright 12 is shrunk by descending, the third upright 13 is shrunk by descending, or the third upright 13 is shrunk by descending, and the second upright 12 is shrunk by descending.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; may be a communication between two elements or an interaction between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature, which may be in direct contact with the first and second features, or in indirect contact with the first and second features via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is level lower than the second feature.

In the description of the present specification, the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., refer to particular features, structures, materials, or characteristics described in connection with the embodiment or example as being included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that alterations, modifications, substitutions and variations may be made in the above embodiments by those skilled in the art within the scope of the utility model.

Claims (9)

1. A landing leg mechanism of a bridge girder erection machine is characterized in that,

comprises a lattice type telescopic upright post assembly (1), a positioning piece detachably arranged on the telescopic upright post assembly (1) and a telescopic driver detachably arranged on the telescopic upright post assembly (1);

the telescopic driver can drive the telescopic upright post assembly (1) to extend and retract, and the locating piece can locate the extension and the retraction of the telescopic upright post assembly (1).

2. The leg mechanism of the bridge girder erection machine according to claim 1, wherein,

the telescopic upright post assembly (1) comprises a plurality of upright posts which are sequentially sleeved in a sliding manner up and down, and the upright posts positioned above are sleeved in the upright posts adjacent to the lower upright posts;

in two adjacent uprights:

the telescopic driver can be detachably arranged at the lower end of the upright post positioned above to drive the upright post positioned above to slide up and down;

the locating piece is detachably arranged on the upper portion of the upright post positioned below, and can locate the sliding position of the upright post positioned above.

3. The leg mechanism of the bridge girder erection machine according to claim 2, wherein,

the plurality of upright posts comprise a first upright post (11), a second upright post (12) and a third upright post (13);

the second upright (12) is sleeved in the first upright (11) in a vertically sliding manner, and the third upright (13) is sleeved in the second upright (12) in a vertically sliding manner;

the telescopic drives comprise a first telescopic drive (21) and a second telescopic drive (22);

the first telescopic driver (21) can be detachably arranged below the second upright (12), and the second telescopic driver (22) can be detachably arranged below the third upright (13);

the positioning pieces comprise a first positioning piece (31) and a second positioning piece (32);

the first positioning piece (31) is detachably arranged on the upper portion of the first upright (11), and the second positioning piece (32) is detachably arranged on the upper portion of the second upright (12).

4. The leg mechanism of the bridge girder erection machine according to claim 2, wherein,

the lengths of the plurality of upright posts are sequentially reduced along the direction from bottom to top.

5. The leg mechanism of the bridge girder erection machine according to claim 2, wherein,

the structures of the upright posts are the same, and the cross section shape is square.

6. The leg mechanism of the bridge girder erection machine according to claim 5, wherein,

the upright post is of a cuboid structure formed by a plurality of limbs (14) and a plurality of lacing bars (15);

the plurality of limbs (14) are uniformly arranged around to form a cuboid frame of the upright post, and the adjacent limbs (14) are connected through the plurality of lacing bars (15).

7. The leg mechanism of the bridge girder erection machine according to claim 6, wherein,

the lacing bar (15) comprises a transverse lacing bar and a crossed lacing bar;

the transverse and cross lacing patterns alternate along the length of the limb (14).

8. The leg mechanism of the bridge girder erection machine according to claim 6, wherein,

the limb piece (14) adopts channel steel, I-steel, angle steel or steel pipe.

9. The leg mechanism of the bridge girder erection machine according to claim 6, wherein,

the lacing bar (15) adopts single angle steel.

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