CN112110353A

CN112110353A - Underframe and crane

Info

Publication number: CN112110353A
Application number: CN202010866292.2A
Authority: CN
Inventors: 钟纪红; 谢江平
Original assignee: Hunan Zhonglian Zhongke Construction Hoisting Machinery Co ltd; Zoomlion Heavy Industry Science and Technology Co Ltd
Current assignee: Hunan Zhonglian Zhongke Construction Hoisting Machinery Co ltd; Zoomlion Heavy Industry Science and Technology Co Ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2020-12-22

Abstract

The invention relates to the technical field of cranes and discloses an underframe and a crane. The chassis includes first girder (1), folding second girder (2) and can dismantle the connection first girder (1) with coupling assembling (3) of second girder (2), second girder (2) are including connecting portion (23), second girder (2) pass through connecting portion (23) rigid coupling first girder (1). The second main beam (2) is foldable, so that the size of the underframe can be reduced when the second main beam does not work, and transportation is facilitated.

Description

Underframe and crane

Technical Field

The invention relates to the technical field of cranes, in particular to an underframe and a crane.

Background

The traditional tower crane underframe generally comprises a whole beam, a half beam, two standard sections, a stay bar, a pull rod and the like. The whole beam and the half beam form a supporting plane at the bottom, and the two standard joints are pulled by the diagonal brace. The underframe of the structure is bulky, can not be folded and is relatively troublesome to transport. And the body mount pad of tower crane welds on whole roof beam and half roof beam, if need switch different tower crane in the construction, then the chassis also needs to be changed, like this, and is more time-consuming, has increased the cost moreover. In order to solve the above problems, it is necessary to develop a new underframe which can be adapted to various tower cranes and is convenient to transport.

Disclosure of Invention

The invention aims to solve the problems that the underframe in the prior art cannot adapt to various tower cranes and is not beneficial to transportation, and provides the underframe which can be folded to facilitate transportation and can be suitable for different tower cranes.

In order to achieve the above object, the present invention provides an underframe, which eliminates a brace rod and a pull rod in a traditional underframe, effectively reduces the height of the underframe, and the underframe is foldable, effectively reduces the transportation width of the underframe, and is provided with an adjustable mounting seat, so that the adjustable mounting seat can be adapted to tower cranes of different models and specifications, and thus, when tower cranes of different models and specifications are replaced, the underframe does not need to be replaced, and only the mounting seat needs to be adjusted, and the standard joint connected above the mounting seat and other parts connected with the standard joint are replaced, thereby improving efficiency and reducing cost. The chassis includes first girder, folding second girder and detachably connects first girder with the coupling assembling of second girder, the second girder include with the connecting portion of first girder cross rigid coupling.

Further, the second main beam comprises a first movable portion and a second movable portion hinged at both ends of the connecting portion and foldable relative to the connecting portion.

Further, the connecting assembly comprises a first pull rod assembly and a second pull rod assembly which are arranged in parallel; two ends of the first pull rod assembly are respectively hinged with the first main beam and the second main beam; two ends of the second pull rod assembly are respectively hinged with the first main beam and the second main beam; and the first pull rod assembly and the second pull rod assembly are positioned on the opposite sides of the intersection point of the first main beam and the second main beam.

Furthermore, two ends of the first pull rod assembly are detachably connected with at least one of the first main beam and the second main beam; and two ends of the second pull rod assembly are detachably connected with at least one of the first main beam and the second main beam.

Further, the base frame includes a plurality of fixing lugs provided on the first main beam and/or the second main beam for fixing the first movable portion and the second movable portion when the second main beam is folded.

Further, the underframe comprises a plurality of mounting seats which are arranged on the first main beam and/or the second main beam and used for connecting standard joints.

Furthermore, a plurality of the installation seats are arranged along the center symmetry of the intersection point of the first main beam and the second main beam, and the positions of the installation seats are adjustable.

Further, the chassis includes a plurality of weights.

Further, the ballast weights are arranged on the first main beam and/or the second main beam around the intersection point of the first main beam and the second main beam in such a way that the length of the ballast weights and the length of the first main beam or the second main beam form an included angle of 45 degrees.

A second aspect of the invention provides a crane comprising an undercarriage as described above and a standard knot mounted on the undercarriage.

Through above-mentioned technical scheme, set up the second girder as collapsible to can reduce the volume of chassis when inoperative, be favorable to the transportation.

Drawings

FIG. 1 is a schematic structural view of a chassis according to an embodiment of the present invention;

FIG. 2 is a front view of the undercarriage of FIG. 1 having a four-sided weight;

fig. 3 is a schematic view of the folding of the base frame of fig. 1 with the weight removed.

Description of the reference numerals

1-a first main beam; 2-a second main beam; 21-a first movable part; 22-a second movable portion; 23-a connecting part; 231-first connecting rod; 232-a second connecting structure; 233-third connecting rod; 3-connecting the components; 31-a first tie rod assembly; 32-a second tie rod assembly; 4-fixing the lug; 5-mounting a base; 6-weight reduction; 7-climbing ladder.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. In the present invention, it is to be understood that the terms "upper", "lower", and the like indicate orientations or positional relationships corresponding to orientations or positional relationships actually used; this is done solely for the purpose of facilitating the description of the invention and simplifying the description, and is not intended to imply that the device or element being referred to must be in a particular orientation, constructed and operative, and is not to be construed as limiting the invention.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In order to achieve the above object, the present invention provides, in one aspect, an underframe comprising a first main beam 1, a foldable second main beam 2, and a connecting assembly 3 detachably connecting the first main beam 1 and the second main beam 2, wherein the second main beam 2 comprises a connecting portion 23 cross-fixedly connected with the first main beam 1. Through setting up second girder 2 as collapsible, can fold second girder 2 when inoperative to reduce the volume of chassis, be favorable to the transportation. In order to reduce the volume of the first main beam 1 and the second main beam 2 as much as possible when the first main beam 1 and the second main beam 2 are folded, a connecting part 23 positioned in the middle of the second main beam 2 and the first main beam 1 are fixedly connected in a crossed manner so as to be beneficial to the folding of the second main beam 2, wherein the length of the connecting part 23 can be slightly less than the sum of the two times of the width of the second main beam 2 and the width of the first main beam 1, so that when the second main beam 2 is folded, foldable parts at two ends of the second main beam 2 can be parallel to the length direction of the first main beam 1, and the size of the underframe in the width direction is reduced as. The first main beam 1 and the second main beam 2 are I-shaped beams with I-shaped sections. Of course, the first main beam 1 and the second main beam 2 may be box beams with polygonal cross sections, and the first main beam 1 and the second main beam 2 may be truss structure beams. In short, it is sufficient if the strength, rigidity, and space requirements are satisfied. The connecting portion 23 may have various configurations, and may have an integral configuration or a separate configuration.

Preferably, the second main beam 2 comprises a first movable portion 21 and a second movable portion 22 hinged at both ends of the connecting portion 23 and foldable with respect to the connecting portion 23. The chassis folding or unfolding is performed by rotating the first and second

movable portions

21 and 22. As shown in fig. 1 and 3, one end of the connecting portion 23 and the first movable portion 21 are hinged at a first hinge point, and the other end of the connecting portion 23, which is away from the first movable portion 21, and the second movable portion 22 are hinged at a second hinge point. When the bracket needs to be opened, the first movable part 21 rotates around the first hinge point; the second movable portion 22 rotates around the second hinge point until the first movable portion 21, the second movable portion 22 and the connecting portion 23 are connected to form a straight beam extending along the length of the connecting portion 23, and then the first movable portion 21 and the second movable portion 22 are defined by the connecting assembly 3 and located at the position of the first main beam 1, wherein two ends of the connecting assembly 3 are respectively hinged to the first main beam 1 and the second main beam 2, as shown in fig. 1.

Preferably, the connecting assembly 3 comprises a first tie rod assembly 31 and a second tie rod assembly 32 arranged in parallel; two ends of the first pull rod assembly 31 are respectively hinged with the first main beam 1 and the second main beam 2; two ends of the second pull rod assembly 32 are respectively hinged with the first main beam 1 and the second main beam 2; and the first pull rod assembly 31 and the second pull rod assembly 32 are positioned at opposite sides of the intersection point of the first main beam 1 and the second main beam 2. As shown in fig. 1, two ends of the first pull rod assembly 31 and the second pull rod assembly 32 are respectively hinged to the first main beam 1 and the second main beam 2; through setting up like this, the rigidity of each connecting piece of chassis, the chassis is reliable and stable be difficult to topple. The connecting assembly 3 can also be provided with a plurality of pairs of first pull rod assemblies 31 or second pull rod assemblies 32 which are arranged in a central symmetry manner and in parallel along the intersection point of the first main beam 1 and the second main beam 2, so as to further improve the supporting capability of the underframe.

Preferably, both ends of the first pull rod assembly 31 are detachably connected with at least one of the first main beam 1 and the second main beam 2; two ends of the second pull rod assembly 32 are detachably connected with at least one of the first main beam 1 and the second main beam 2. With the arrangement, when the underframe needs to be folded, the simultaneous constraint of the connecting assembly 3 on the second main beam 2 and the first main beam 1 is relieved by detaching one end or two ends of the connecting assembly 3, so that the second main beam 2 can be folded.

Preferably, the first and second tie rod assemblies 31 and 32 are identical in structure. In this way, the forces of the first main beam 1 and the second main beam 2 supported by the first tie rod assembly 31 and the second tie rod assembly 32 are balanced. The first tie rod assembly 31 or the second tie rod assembly 32 comprises a plurality of third connecting rods 233 which are arranged in parallel up and down, and a plurality of second connecting rods 232 which are connected between two adjacent third connecting rods 233 and arranged in parallel along the height direction of the underframe; and a first connecting bar 231 connecting diagonal lines of the parallelogram composed of the third connecting bar 233 and the second connecting bar 232. The second connecting rod 232 and the third connecting rod 233 are fixed by the first connecting rod 231, so that the first pull rod assembly 31 and/or the second pull rod assembly 32 formed in this way is light and meets the requirements.

As shown in fig. 3, the connecting assembly 3 includes a first tie rod assembly 31 and a second tie rod assembly 32, which are opposite to each other and have the same structure and are arranged along the crossing center of the first main beam 1 and the second main beam 2. The first tie rod assembly 31 or the second tie rod assembly 32 comprises two third connecting rods 233 which are arranged in parallel up and down, and further comprises a second connecting rod 232 which is connected between the two third connecting rods 233 and arranged in parallel along the height direction of the underframe; and a first connecting bar 231 connecting diagonal lines of the parallelogram composed of the third connecting bar 233 and the second connecting bar 232.

Of course, the third connecting rod 233 may be provided in more, and the second connecting rod 232 may also be provided in more; the first link bar 231 may be provided in plurality in each parallelogram composed of the third link bar 233 and the second link bar 232 in parallel as long as structural stability can be facilitated.

When the second main beam 2 is folded, one end of the connecting component 3 hinged on the second main beam 2 can be detached, and then one end of the detached connecting component 3 is fixed on the first main beam 1. It is of course also possible to detach the connecting assembly 3 from hinging one end of the first main beam 1 and fixing it at the same time to the second main beam 2.

Preferably, the base frame comprises a plurality of fixing lugs 4 provided on the first and/or second

main beam

1, 2 for fixing the first and second

movable portions

21, 22 when the second main beam 2 is folded. As shown in fig. 3, two fixing lugs 4 are arranged at two ends of the first main beam 1 and the second main beam 2, and each end is arranged along two sides of the main beam in the width direction. Thus, the fixing lugs 4 can ensure that the second main beam 2 is fixed with the first main beam 1 and the first main beam 1 is fixed with the connecting component 3 when the second main beam 2 is folded; or the second main beam 2 and the first main beam 1 are fixed, and the connecting assembly 3 and the second main beam 2 are fixed.

Preferably, the underframe comprises a plurality of mounting seats 5 mounted on the first 1 and/or second 2 main beams for connecting standard knots. By providing the mounting seats 5, it is possible to connect different standard knots of e.g. a tower crane, which have different specifications.

Preferably, a plurality of the mounting seats 5 are arranged along the center symmetry of the intersection point of the first main beam 1 and the second main beam 2, and the positions of the mounting seats 5 are adjustable. Thus, the standard section of the tower crane with different specifications can be adapted.

Preferably, the mounting 5 is connected to the chassis by bolts. When the tower crane with different specifications needs to be replaced, the mounting base 5 can be replaced to enable the mounting base 5 to correspond to the section size of the standard section, the connection is simple and reliable, the replacement of the machine can be realized without replacing the underframe, the working efficiency is effectively improved, and the production cost is reduced.

Preferably, the chassis comprises a plurality of weights 6. By arranging the weights 6 into a plurality of blocks, the center of gravity of the underframe and objects carried above the underframe can be conveniently adjusted by adjusting the arrangement of the weights 6.

Preferably, the ballast weight 6 is arranged on the first 1 and/or second 2 main beam around the intersection of the first 1 and second 2 main beam in such a way that the length of the ballast weight 6 and the length of the first 1 or second 2 main beam are angled at 45 °.

The arrangement mode of the ballast weights 6 is that the ballast weights 6 are arranged around the intersection points of the first main beam 1 and the second main beam 2 in a face-to-face mode, or the ballast weights 6 are arranged around the intersection points of the first main beam 1 and the second main beam 2 in four sides, and the ballast weights 6 can be arranged in a single layer or in multiple layers.

In one embodiment, as shown in fig. 1-2, the ballast weights 6 are arranged in four directions around the intersection of the first and second

main beams

1, 2. By arranging the weights 6 in a manner that the weights 6 are placed on two sides, as shown in fig. 1, and then the weights 6 are placed on four sides, as shown in fig. 2, the height of the weight 6 with the same weight is reduced, so that the center of gravity is lowered, and the underframe is more stable.

In fig. 2, a ballast weight 6 is arranged around the intersection of the first 1 and second 2 main beams in such a way that the length of the ballast weight 6 and the length of the first 1 and second 2 main beams form an angle of 45 °; and both ends of the ballast weight 6 are respectively pressed on the first main beam 1 and the second main beam 2 at the same time. With this arrangement, the height reduction of the overall weight 6 is relatively low, which is advantageous for improving the anti-overturning performance of a crane using such an undercarriage. When the weights 6 are placed on four sides, the first weight 6 and the second weight 6 are placed in parallel along the opposite sides of the centers of the first main beam 1 and the second main beam 2, and then the third weight 6 and the fourth weight 6 are placed in the direction perpendicular to the length direction of the first weight 6 and the second weight 6; and both ends of the third ballast weight 6 and the fourth ballast weight 6 are supported at both ends of the first ballast weight 6 and the second ballast weight 6; by analogy, the ballast weights 6 can be set into any block as required, and are arranged like this, so that gaps are formed between the ballast weights 6 on the premise of meeting the anti-overturning performance of the crane using the underframe, and the climbing requirement of operators can be met.

Preferably, a ladder stand 7 is arranged on the first main beam 1 and/or the second main beam 2. The worker can climb the ladder 7.

Preferably, the underframe further comprises cushion blocks arranged at the ends of the two ends of the first main beam 1 and the second main beam 2 and positioned at the bottoms of the main beams. The cushion block can increase the contact area between the underframe and the ground, reduce the local stress of the ground and prevent the ground from sinking due to the fact that the pressure exceeds the allowable pressure. Thereby improving the supporting performance of the base frame.

Preferably, the cushion block is provided with a mounting hole. The underframe is fixed on the ground through the anchor bolts in the mounting holes, so that the underframe is effectively prevented from moving on the ground.

To further illustrate the present invention, the following illustrates the installation and removal of a tower crane utilizing the undercarriage of the present invention.

When the underframe is transported to a designated place for installation of the tower crane, the underframe is unfolded as shown in fig. 1, so that the first main beam 1 is arranged along the X direction and the second main beam 2 is arranged along the Y direction. The first main beam 1 and the second main beam 2 are connected to the ground through cushion blocks arranged at the lower parts of the two ends of the first main beam 1 and the second main beam 2 respectively. At this time, the space is divided into four quadrants by the first main beam 1 and the second main beam 2; the first 1 and second 2 main beams define a distance between each other by means of the connection assembly 3. The connecting assembly 3 comprises a first pull rod assembly 31 and a second pull rod assembly 32 which are arranged in parallel; the first lever assembly 31 is disposed in the second quadrant, and the second lever assembly 32 is disposed in the fourth quadrant. The included angle between the first pull rod assembly 31 and the first main beam 1 and the second main beam 2 is 45 degrees. The included angle between the second pull rod assembly 32 and the first main beam 1 and the second main beam 2 is also 45 degrees. Two ends of the first pull rod assembly 31 are respectively hinged with the first main beam 1 and the first movable portion 21, and two ends of the second pull rod assembly 32 are respectively hinged with the first main beam 1 and the second movable portion 22. Wherein, the connection point of the first pull rod assembly 31 and the first movable part 21 is detachably hinged; the connection point of the second pull rod assembly 32 and the second movable portion 22 is configured to be detachably connected. Firstly, the weight 6 is pressed on two sides as shown in fig. 1, then the weight is pressed on four sides as shown in fig. 2, the weight 6 is placed completely, then two mounting seats 5 which are arranged on the first main beam 1 in a central symmetry mode, a third mounting seat 5 arranged on the first movable part 21 and a fourth mounting seat 5 arranged on the second movable part 22 are adjusted, the four mounting seats 5 are enabled to be equidistant from the intersection point of the first main beam 1 and the second main beam 2, the distance is matched with a standard knot to be mounted, and then the standard knot is mounted on the mounting seat 5. When tower cranes with different specifications need to be replaced, the original standard knot is removed, then the type of the mounting seat 5 is replaced, the mounting seat 5 is adjusted and fixed, and then the new standard knot of the tower crane is mounted on the newly replaced mounting seat 5, so that the replacement of tower cranes with different specifications can be completed.

When the tower crane finishes working and needs to be transported to the next working place. The following operations are required:

a, dismantling the standard knot;

b, removing the weight 6;

c, removing the connection between the cushion block and the foundation;

d, removing the connection between the first pull rod assembly 31 and the first movable part 21, rotating the first pull rod assembly 31 counterclockwise by taking a hinge point of the first pull rod assembly 31 and the first main beam 1 as a center, and fixing one end of the first pull rod assembly 31 departing from the hinge point on a fixing lug 4 at the tail end of the first main beam 1; in the same way, the connection between the second pull rod assembly 32 and the second movable portion 22 is removed, the second pull rod assembly 32 is rotated counterclockwise around the hinge point of the second pull rod assembly 32 and the first main beam 1, and then the end of the second pull rod assembly 32 away from the hinge point is fixed on the fixing lug 4 at the end of the first main beam 1.

The first movable part 21 is rotated clockwise and then is fixedly connected with the fixed lug 4 on the first main beam 1 through the fixed lug 4 on the first movable part 21; the second movable part 22 is rotated clockwise and then fixedly connected with the fixed lug 4 of the first main beam 1 through the fixed lug 4 of the second movable part 22.

And E, the chassis is then transported to a designated location in a folded state as shown in fig. 3.

A second aspect of the invention provides a crane comprising an undercarriage as described above and a standard knot mounted on the undercarriage. The crane has the technical advantages of the underframe, and the detailed description is omitted.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention. Including each of the specific features, are combined in any suitable manner. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims

1. The utility model provides an underframe, its characterized in that, the underframe includes first girder (1), folding second girder (2) and detachably connects first girder (1) with coupling assembling (3) of second girder (2), second girder (2) include with connecting portion (23) of first girder (1) criss-cross rigid coupling.

2. The undercarriage according to claim 1 wherein the second main beam (2) comprises a first mobile portion (21) and a second mobile portion (22) hinged at the two ends of the connecting portion (23) and foldable with respect to the connecting portion (23).

3. The undercarriage of claim 2 wherein the linkage assembly (3) comprises a first tie rod assembly (31) and a second tie rod assembly (32) arranged in parallel; two ends of the first pull rod assembly (31) are respectively hinged with the first main beam (1) and the second main beam (2); two ends of the second pull rod assembly (32) are respectively hinged with the first main beam (1) and the second main beam (2); and the first pull rod assembly (31) and the second pull rod assembly (32) are positioned on opposite sides of the intersection point of the first main beam (1) and the second main beam (2).

4. The undercarriage of claim 3 wherein both ends of the first tie rod assembly (31) are removably connected to at least one of the first (1) and second (2) main beams; two ends of the second pull rod assembly (32) are detachably connected with at least one of the first main beam (1) and the second main beam (2).

5. The undercarriage of claim 4 comprising a plurality of fixing lugs (4) provided on the first (1) and/or second (2) main beams for fixing the first (21) and second (22) movable portions when the second main beam (2) is folded.

6. The undercarriage of claim 1 comprising a plurality of mounting seats (5) for connecting standard knots mounted on the first (1) and/or second (2) main beams.

7. The undercarriage of claim 6 wherein a plurality of said mounting seats (5) are arranged centrally symmetrically along the intersection of said first (1) and second (2) main beams, and wherein the position of said mounting seats (5) is adjustable.

8. Undercarriage according to claim 1, characterized in that it comprises a plurality of weights (6).

9. Undercarriage according to claim 8, characterized in that the ballast weight (6) is arranged on the first (1) and/or second (2) main beam around the intersection of the first (1) and second (2) main beam in such a way that the length of the ballast weight (6) and the length of the first (1) or second (2) main beam are angled at 45 °.

10. A crane, characterized in that it comprises a base frame according to any one of claims 1-9 and a standard knot mounted on the base frame.