CN219058365U

CN219058365U - Anti-deformation arm support, arm support system and crane

Info

Publication number: CN219058365U
Application number: CN202222955229.3U
Authority: CN
Inventors: 周玉龙; 韩雷; 赵江平; 朱发浩
Original assignee: Construction Machinery Branch of XCMG
Current assignee: Construction Machinery Branch of XCMG
Priority date: 2022-11-07
Filing date: 2022-11-07
Publication date: 2023-05-23
Anticipated expiration: 2032-11-07

Abstract

The utility model discloses an anti-deformation arm support, an arm support system and a crane, wherein the anti-deformation arm support comprises two chords and a plurality of web member groups; the two chords are arranged in parallel, and a plurality of web member groups are uniformly distributed between the two chords and are used for connecting and supporting the two chords; the length of the two chord rods is different. According to the utility model, the anti-deformation arm support with the chords with different lengths is arranged, so that the arm support system with the pre-deformation bending is constructed, the anti-deflection of the arm support is counteracted, the whole arm support system reaches a horizontal state, the uniform stress of each main chord is realized, no additional force is generated, and the bearing capacity of the arm support system is further improved.

Description

Anti-deformation arm support, arm support system and crane

Technical Field

The utility model relates to an anti-deformation arm support, an arm support system and a crane, and belongs to the technical field of hoisting of engineering machinery cranes.

Background

In hoisting equipment, the boom system has two functions: firstly, the lifting device is used for lifting an article to have a certain height and amplitude; secondly, the load is born, so that the load is gradually transferred to the whole machine and the ground through the arm support system; therefore, the length of the arm support is a main parameter for determining the operation height and amplitude of the hoisting equipment; therefore, in order to pursue larger lifting height and operation amplitude, the length of the boom system needs to be increased;

after the boom system supported by the luffing pulling plate (inhaul cable) is assembled, the boom is pulled up to a working angle through the luffing capacity of the boom system, as shown in figure 1; in the horizontal arm lifting state, the arm support system is of a long thin bending structure, and the whole arm support of the arm support system, particularly the middle part of the arm support system, can generate downward deflection due to the dead weight (G in fig. 1) of the arm support system; meanwhile, under the action of the axial component force of the arm support generated by the amplitude variation force (F in fig. 1), the initial deformation is further increased, and the secondary deformation is caused, so that the structural stress of the arm support is increased. Further, the longer the arm support length is, the heavier the arm support weight is, and the arm support is at risk of instability; this phenomenon seriously hinders the achievement of the objective of desiring to achieve a greater lifting height and working amplitude by increasing the boom length;

when in lifting, the boom system can generate certain downwarping due to dead weight under the working condition of a long boom, and particularly the downwarping is more serious when the amplitude is larger; meanwhile, under certain working conditions (such as the working condition of the special forehead arm for wind power shown in fig. 3), a certain distance needs to be extended forwards to form a local cantilever structure, and a large bending moment M is formed for a main arm supported below the cantilever structure, and as the lifting weight is increased, the bending moment M is also larger, so that the whole cantilever system is in a reverse bending state, and the bearing capacity of the cantilever is reduced;

the rigidity of the cantilever crane system is generally increased to resist various deformations of the cantilever crane system, so that the weight of the cantilever crane system is increased, and a series of problems such as increased force of a whole machine component, insufficient stability of the whole machine and the like are brought.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide an anti-deformation arm support, an arm support system and a crane.

In order to achieve the above object, in a first aspect, the present utility model provides an anti-deformation arm support, including two chords and a plurality of web members;

the two chords are arranged in parallel, and a plurality of web member groups are uniformly distributed between the two chords and are used for connecting and supporting the two chords;

the length of the two chord rods is different.

Further, the web member group comprises two web members which are arranged in a crossing way, and two openings formed by the crossing of the web member group face to the two chords respectively.

Further, connectors are arranged at two ends of each chord member.

Further, two ends of each chord member are provided with sealing rods, and each sealing rod is connected with each chord member;

the web member group is arranged between the two closed rods.

Further, the two closing rods are arranged in parallel and are perpendicular to the two chords.

The utility model provides an anti-deformation arm support system, which comprises a bottom joint arm, a middle joint arm, a transition joint arm, an arm head and a pulley block which are connected through pin shafts;

the bottom knuckle arm, the middle knuckle arm and the transition knuckle arm comprise a plurality of anti-deformation arm frames according to any one of the first aspect.

Further, the anti-deformation arm frames are sequentially connected and positioned on the section of the arm frame system in the deformation direction.

Further, when the anti-deformation arm frames are connected, the shorter chord rods of the anti-deformation arm frames are positioned at one side close to the deformation direction, and the longer chord rods are positioned at one side far from the deformation direction.

In a third aspect, the utility model provides a crane provided with an anti-deformation boom system according to any of the second aspects.

The utility model has the beneficial effects that:

the utility model provides an anti-deformation cantilever crane system and a crane with the same, wherein the anti-deformation cantilever crane system with chords of different lengths is connected, so that the cantilever crane system with pre-deformation bending is constructed, the pre-deformation bending is generated when the cantilever crane is empty, and the counter-deflection of the cantilever crane is counteracted through the pre-deformation bending when the cantilever crane carries objects, so that the whole cantilever crane system reaches a horizontal state, the stress of each main chord is uniform, no additional force is generated, and the bearing capacity of the cantilever crane system is further improved.

Drawings

FIG. 1 is a schematic illustration of a boom horizontal boom;

FIG. 2 is a schematic illustration of the boom in a boom down state;

FIG. 3 is a reverse flexibility schematic view of wind power goose head working condition lifting load;

FIG. 4 is a front view of an anti-deformation boom, a boom system and an anti-deformation boom in a crane provided by an embodiment of the utility model;

FIG. 5 is a front view of an initial deformation state of an anti-deformation boom, a boom system and a crane in which the initial deformation state of the anti-deformation boom system is an anti-deflection state, provided by the embodiment of the utility model;

FIG. 6 is a front view of an anti-deformation boom, a boom system and a crane with an anti-deformation boom system provided by an embodiment of the utility model;

in the figure: 100. a chord; 200. a web member group; 300. a joint; 400. and a closing rod.

Detailed Description

The utility model is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.

According to the anti-deformation arm support, the arm support system and the crane, the anti-deformation arm support with the chords of different lengths is arranged for connection, the arm support system with the pre-deformation bending is constructed, the pre-deformation bending is generated when the arm support is empty, the counter-deflection of the arm support is counteracted through the pre-deformation bending when the arm support carries objects, the whole arm support system is enabled to reach a horizontal state, the effect that the stress of each main chord is uniform, no additional force is generated is achieved, and the bearing capacity of the arm support system is further improved.

Embodiment one:

the utility model provides an anti-deformation arm support, which is shown in fig. 4, and comprises two chords 100 with unequal lengths, wherein the two chords 100 are arranged in parallel, and because the lengths of the two chords 100 are different, when a plurality of anti-deformation arm supports are used for combining and constructing an anti-deformation arm support system, shorter chords 100 are sequentially connected, longer chords 100 are connected, and because of the different lengths of the chords 100, an anti-deformation arm support system with pre-deformation is constructed, and the downward deflection is counteracted by pre-deformation when carrying objects, so that the whole arm support system reaches a horizontal state, and the main chords 100 are uniformly stressed without generating additional force, thereby improving the bearing capacity of the arm support system.

In the present utility model, when the present utility model is specifically provided, the web member group 200 includes two web members that are disposed in a crossing manner, and two openings formed by the crossing of the two web members face the two chord members 100, respectively.

Meanwhile, in order to facilitate the connection of other anti-deformation arm frames, connectors 300 are arranged at two ends of each chord member 100;

and two ends of the two chords 100 are provided with sealing rods 400, the two sealing rods 400 are respectively connected with the two chords 100, the two sealing rods 400 are arranged in parallel and are perpendicular to the two chords 100, and the web member group 200 is arranged between the two sealing rods 400.

Embodiment two:

based on the anti-deformation arm support according to the first embodiment, the embodiment 2 of the utility model provides an anti-deformation arm support system, which comprises a bottom joint arm, a plurality of middle joint arms with different lengths and different wall thicknesses, a transition joint arm, an arm head and a pulley block, wherein all the arm joints are connected into a whole through a pin shaft, the bottom joint arm, the middle joint arm and the transition joint arm comprise a plurality of anti-deformation arm supports according to any one of the embodiment 1, and the length of the chord member 100 is adjusted through the actually required anti-deformation capability and the requirement of convenience in disassembly and assembly.

The anti-deformation arm frames are sequentially connected and positioned on the section of the arm frame in the anti-deformation direction so as to perform pre-deformation and offset deflection during carrying, so that the whole arm frame system is in a horizontal state, the main rods are uniformly stressed, no additional force is generated, and the carrying capacity of the arm frame system is improved.

Meanwhile, when the anti-deformation arm frames are connected in sequence, when the anti-deformation arm frames are connected, the shorter chord rods 100 of the anti-deformation arm frames are positioned at one side close to the deformation direction, and the longer chord rods 100 are positioned at one side far away from the deformation direction, so that only one pre-deformation of the arm frame system can be ensured.

Example 3:

based on embodiment 2, embodiment 3 of the present utility model provides a crane provided with the anti-deformation boom system according to any one of embodiment 2.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present utility model, and such modifications and variations should also be regarded as being within the scope of the utility model.

Claims

1. An anti-deformation arm support is characterized in that:

comprises two chord members (100) and a plurality of web member groups (200);

the two chords (100) are arranged in parallel, and a plurality of web member groups (200) are uniformly distributed between the two chords (100) and are used for connecting and supporting the two chords (100);

the two chords (100) differ in length.

2. The anti-deformation boom according to claim 1, wherein:

the web member group (200) comprises two web members which are arranged in a crossing way, and two openings formed by the crossing of the web member group (200) face to the two chords (100) respectively.

3. The anti-deformation boom according to claim 1, wherein:

and connectors (300) are arranged at two ends of each chord member (100).

4. The anti-deformation boom according to claim 1, wherein:

both ends of the two chords (100) are provided with sealing rods (400), and each sealing rod (400) is connected with the two chords (100);

the web member group (200) is disposed between two closure members (400).

5. The anti-deformation boom of claim 4, wherein:

the two closing rods (400) are arranged in parallel and are perpendicular to the two chords (100).

6. An anti-deformation cantilever crane system which is characterized in that:

the device comprises a bottom joint arm, a middle joint arm, a transition joint arm, an arm head and a pulley block which are connected through pin shafts;

the bottom knuckle arm, the middle knuckle arm and the transition knuckle arm comprise a plurality of anti-deformation arm frames according to any one of claims 1 to 5.

7. The anti-deformation boom system according to claim 6, wherein:

the anti-deformation arm frames are sequentially connected and are positioned on the section of the arm frame system in the deformation direction.

8. The anti-deformation boom system according to claim 7, wherein:

when the anti-deformation arm frames are connected, the shorter chord rods (100) of the anti-deformation arm frames are positioned at one side close to the deformation direction, and the longer chord rods (100) are positioned at one side far away from the deformation direction.

9. A crane, characterized in that:

-providing an anti-deformation boom system according to any of claims 6 to 8.