CN218665138U - Amplitude changing device for crane and crane - Google Patents

Abstract

The utility model discloses a become width of cloth device and hoist for hoist, this width of cloth device includes: the first end of the main mast is rotatably connected with the front end of a rotary table of the crane; the pulley assembly comprises a first pulley block and a second pulley block which are arranged at the second end of the main mast; the steel wire rope is wound on the first pulley block and the second pulley block; the truss assembly is arranged at the rear end of the rotary table and extends backwards, and the second pulley block is arranged at the rear end of the truss assembly. The amplitude variation device for the crane and the crane have the advantages of being simple in structure, beneficial to reducing the tensile force borne by the steel wire rope and beneficial to improving the use stability.

Description

Amplitude changing device for crane and crane

Technical Field

The utility model relates to a hoist technical field specifically relates to a become width of cloth device and hoist for hoist.

Background

The main amplitude pulley block of the amplitude variation device of the crane in the prior art is usually installed on a rotary table, when the main mast of the amplitude variation device is long, the installation position makes the force arm of a steel wire rope of the amplitude variation device smaller, so that the steel wire rope is subjected to larger tension, the use multiplying power or the diameter of the steel wire rope needs to be increased for ensuring the use reliability of the amplitude variation device, and the structural strength of the rotary table needs to be enhanced so as to prevent the main amplitude pulley block from falling off.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a become width of cloth device and hoist for hoist, this a become width of cloth device and hoist for hoist have simple structure, are favorable to reducing the pulling force that wire rope receives, are favorable to promoting the advantage of stability in use.

In order to achieve the above object, the present invention provides in a first aspect a luffing device for a crane, comprising:

the first end of the main mast is rotatably connected with the front end of a rotary table of the crane;

the pulley assembly comprises a first pulley block and a second pulley block which are arranged at the second end of the main mast;

the steel wire rope is wound on the first pulley block and the second pulley block;

the truss assembly is arranged at the rear end of the rotary table and extends backwards, and the second pulley block is arranged at the rear end of the truss assembly.

The utility model discloses an embodiment, the truss subassembly includes first truss arm and second truss arm that length is all adjustable, and the front end of first truss arm is articulated with the rear side of revolving stage, and the front end of second truss arm sets up below the front end of first truss arm and is articulated with the rear side of revolving stage with the interval, and the rear end of first truss arm and the rear end of second truss arm are connected, and the second assembly pulley sets up the rear end at first truss arm, second truss arm.

In an embodiment of the present invention, the straight line where the first pulley block and the second pulley block are located is L1, the straight line where the rotation center of the first end of the first pulley block and the main mast is located is L2, and the included angle between L1 and L2 is 90 °.

The utility model discloses an in the embodiment, the truss subassembly still includes a plurality of intermediate junction arms, and the one end and the first truss arm of intermediate junction arm are connected, and the other end and the second truss arm of intermediate junction arm are connected.

In an embodiment of the present invention, the cross-section of the first truss arm, the second truss arm and the intermediate connecting arm is circular ring-shaped, square ring-shaped or rectangular.

The utility model discloses an in the embodiment, the below of truss subassembly is provided with counter weight mechanism.

The utility model discloses an in the embodiment, counter weight mechanism is including setting up the counter weight base and a plurality of detachably setting the balancing weight on the counter weight base in truss subassembly below.

The embodiment of the utility model provides an in, counter weight mechanism still includes the lift that is used for adjusting the height of counter weight base.

The utility model discloses an in the embodiment, the lifter is flexible hydro-cylinder.

The utility model discloses the second aspect provides a hoist, and this hoist includes foretell a change width of cloth device for hoist.

According to the technical scheme, the amplitude changing device comprises the main mast, the pulley assembly, the steel wire rope and the truss assembly, the first pulley block is arranged at one end, far away from the rotary table, of the main mast, the truss assembly is arranged at the rear end of the rotary table and extends backwards, the second pulley block is arranged at the rear end of the truss assembly, under the condition that the moment is certain, compared with the prior art, the force arm corresponding to the steel wire rope is increased when the steel wire rope is stressed due to the structural design, the stress of the steel wire rope is reduced, the use multiplying power of the steel wire rope is not required to be additionally increased in order to guarantee the use reliability of the amplitude changing device, and the diameter or the structural strength of the rotary table are enhanced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments, but do not limit the embodiments. In the drawings:

fig. 1 is a luffing device in an embodiment of the present invention;

fig. 2 is a luffing device in the prior art of the present invention.

Description of the reference numerals

1. Main mast 2 rotary table

3. Pulley assembly 301 first pulley block

302. Second pulley block 4 steel wire rope

5. Truss assembly 501 first truss arm

502. Intermediate connecting arm of second truss arm 503

6. Counterweight mechanism 601 counterweight base

602. Balancing weight 603 lifting piece

7. Pin shaft oil cylinder

Detailed Description

The following describes in detail embodiments of the present invention with reference to the accompanying drawings. It should be understood that the description herein is provided for illustration and explanation of the invention and is not intended to limit the invention.

The embodiment of the utility model provides a novel become width of cloth device for hoist in the embodiment, the width of cloth device in this embodiment is applicable to the non-super-lift operating mode of hoist, as shown in fig. 1, this becomes width of cloth device includes main mast 1, loose pulley assembly 3, wire rope 4 and truss assembly 5, specifically, the first end of main mast 1 and the front end of revolving stage 2 of hoist rotate to be connected, specifically, main mast 1 inclines to set up and its first end and the front end of revolving stage 2 hinge joint for main mast 1 can rotate relative to revolving stage 2, and further, main mast 1 can adopt integral design or split type design in this embodiment; the pulley assembly 3 includes a first pulley block 301 and a second pulley block 302 disposed at the second end of the main mast 1, the steel wire rope 4 is wound around the first pulley block 301 and the second pulley block 302, the amplitude varying device in this embodiment further includes a main amplitude varying mechanism (such as a winding mechanism) for winding the steel wire rope 4, one end of the steel wire rope 4 is connected to the main amplitude varying mechanism, and the other end of the steel wire rope 4 is connected to the main amplitude varying mechanism after passing through the first pulley block 301 and the second pulley block 302, wherein when the steel wire rope 4 passes through the first pulley block 301 and the second pulley block 302, a part of the steel wire rope 4 is wound around the first pulley block 301 and the second pulley block 302, and a force is applied to the main amplitude varying mechanism to pull the steel wire rope 4 to change the inclination angle of the main mast 1 (in this embodiment, the boom angle of the crane may also be changed correspondingly when the inclination angle of the main mast 1 is changed). Under the condition of a certain moment, the larger the corresponding moment arm when the steel wire rope 4 is stressed, the smaller the force applied to the steel wire rope 4, and further, in this embodiment, the length Δ L of the moment arm corresponding to the stressed steel wire rope 4 is equal to the vertical distance between the straight line L4 (the angle between the L4 and the L2 is not 90 °) where the first pulley block 301 and the second pulley block 302 are located and the rotation center of the first end of the main mast 1. In the prior art (as shown in fig. 2, a straight line where a first pulley block 301 and a second pulley block 302 are located is L3, and a force arm length Δ L' corresponding to a steel wire rope 4 is stressed), the second pulley block 302 is directly installed on the turntable 2, in this embodiment, the truss component 5 is disposed at the rear end of the turntable 2 and extends rearward, and the second pulley block 302 is disposed at the rear end of the truss component 5.

In an embodiment of the present invention, the truss assembly 5 includes a first truss arm 501 and a second truss arm 502 with adjustable length, the front end of the first truss arm 501 is hinged to the rear side of the turntable 2, the front end of the second truss arm 502 is disposed under the front end of the first truss arm 501 at intervals and is hinged to the rear side of the turntable 2, specifically, the truss assembly 5 includes a first truss arm 501 disposed horizontally and a second truss arm 502 disposed obliquely, the front end of the first truss arm 501 is hinged to the rear side of the turntable 2, in this embodiment, the front end of the first truss arm 501 is hinged to the rear side of the turntable 2 through a first pin shaft, and the first pin shaft is further provided with a first spring bolt for preventing the first truss arm 501 and the turntable 2 from falling off; the front end of the second truss arm 502 is arranged below the front end of the first truss arm 501 at intervals and is hinged with the rear side of the turntable 2, and similarly, in this embodiment, the front end of the second truss arm 502 is hinged with the rear side of the turntable 2 by a second pin shaft, and the second pin shaft is further provided with a second spring bolt for preventing the second spring bolt from falling off from the second truss arm 502 and the turntable 2; the rear end of the first truss arm 501 is connected with the rear end of the second truss arm 502, and the second pulley block 302 is arranged at the rear ends of the first truss arm 501 and the second truss arm 502, so that the truss assembly 5 not only meets the working performance, but also has the advantages of simple structure and convenience in production, manufacture, installation and disassembly;

further, the first truss arm 501 and the second truss arm 502 are both telescopic arms, and the position of the second pulley block 302 can be changed by changing the telescopic lengths of the first truss arm 501 and the second truss arm 502, so that the length of a corresponding force arm is changed when the steel wire rope 4 is stressed, and the second pulley block 302 can be adjusted to an optimal installation position according to actual working conditions. In this embodiment, flexible arm includes first extensible member and second extensible member, and the one end of second extensible member stretches into the inside of first extensible member and can carry out axial displacement relatively first extensible member, can realize the flexible function of flexible arm through the axial displacement length that changes the second extensible member.

In an embodiment of the present invention, the cross-section of the first truss arm 501, the second truss arm 502 and the intermediate connecting arm 503 is circular ring, square ring or rectangular, that is, in this embodiment, the first truss arm 501, the second truss arm 502 and the intermediate connecting arm 503 can be round tubes, square tubes and laths, which is simple in structure and easy to manufacture.

In an embodiment of the present invention, the amplitude changing device further includes a pin cylinder 7 (the pin cylinder 7 in this embodiment is an integrated pin cylinder 7), the pin cylinder 7 is rotatably disposed at the rear end of the first truss arm 501 and the second truss arm 502, and the second pulley block 302 is disposed on the pin cylinder 7.

The utility model discloses an embodiment, the straight line at first assembly pulley 301 and second assembly pulley 302 place is L1, the straight line at the center of rotation place of the first end of first assembly pulley 301 and mast 1 is L2, contained angle between L1 and the L2 is 90, specifically, when contained angle between L1 and L2 is 90, arm of force length that corresponds when 4 atresss of wire rope reaches the maximum value in this embodiment, this maximum value is the length value of mast 1, 4 atresss of wire rope are minimum under this kind of situation, be favorable to further promoting the use reliability of becoming the width of cloth device.

The utility model discloses an in an embodiment, truss component 5 still includes the intermediate link arm 503 that a plurality of slopes set up, and the one end of intermediate link arm 503 and first truss arm 501 can dismantle through round pin axle or bolt assembly and link together, and the other end of intermediate link arm 503 and second truss arm 502 can dismantle through round pin axle or bolt assembly and link together, and this kind of structural design does benefit to the installation flexibility that strengthens intermediate link arm 503 to and truss component 5's overall structure stability and structural strength.

The utility model discloses an in the embodiment, the below of truss subassembly 5 is provided with counter weight mechanism 6 for promote the antidumping performance and the overall stability of hoist, the equilibrium when reinforcing revolving stage 2 carries out the gyration operation.

The utility model discloses an in the embodiment, counter weight mechanism 6 is including setting up counter weight base 601 and a plurality of detachably setting the balancing weight 602 on counter weight base 601 in truss subassembly 5 below, and the staff of being convenient for increases or reduces the use quantity of balancing weight 602 according to the actual demand to satisfy the actual balanced demand of hoist, make the hoist can adapt to more operating modes, can exert hoisting performance more comprehensively.

In an embodiment of the present invention, the counterweight mechanism 6 further includes a lifting member 603 for adjusting the height of the counterweight base 601. Specifically, the upper end of lifter 603 is connected with the rear end of truss subassembly 5, and counterweight mechanism 6 still includes many connecting links, and the one end and the counterweight base 601 of connecting link are connected, and the other end and the lower extreme of lifter 603 of connecting link are connected, change the flexible length of lifter 603 and can realize counterweight base 601's altitude mixture control, and the staff can adjust counterweight base 601 to suitable height according to actual demand, and the hoist of being convenient for carries out gyration function and walking function.

The utility model discloses an in the embodiment, lifting member 603 is flexible hydro-cylinder, can satisfy the flexible performance, still has simple structure, easily production, assembly, advantage that the cost is lower. Further, the lifting member 603 in this embodiment may also be replaced with other members having a telescopic function according to actual requirements, such as a telescopic cylinder, an electric telescopic cylinder, and the like.

The utility model discloses a novel hoist is provided in another embodiment, this hoist includes the change width of cloth device for hoist of above-mentioned embodiment, and further, this hoist includes but not limited to crawler crane, and revolving stage 2 installs on crawler chassis.

The utility model provides a become width of cloth device and hoist for hoist, become width of cloth device includes the main mast, loose pulley assembly, wire rope and truss subassembly, the one end of revolving stage is kept away from at the main mast to first assembly pulley setting, the truss subassembly sets up at the rear end of revolving stage and backward extension, the second assembly pulley sets up the rear end at the truss subassembly, under the certain circumstances of moment, compare in prior art, the arm of force that corresponds when above-mentioned structural design makes the wire rope atress increases, and then make wire rope's atress reduce, need not additionally to increase wire rope's use multiplying power in order to guarantee to become width of cloth device's use reliability, the diameter or the structural strength who strengthens the revolving stage.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide the technical solution of the present invention with a plurality of simple modifications, including combining each specific technical feature in any suitable manner, and in order to avoid unnecessary repetition, the present invention does not provide additional description for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. A luffing apparatus for a crane, comprising:

the first end of the main mast (1) is rotatably connected with the front end of a rotary table (2) of the crane;

a pulley assembly (3) comprising a first pulley block (301) and a second pulley block (302) arranged at a second end of the main mast (1);

the steel wire rope (4) is wound on the first pulley block (301) and the second pulley block (302);

the truss assembly (5) is arranged at the rear end of the rotary table (2) and extends backwards, and the second pulley block (302) is arranged at the rear end of the truss assembly (5).

2. Luffing device for a crane according to claim 1, wherein the truss assembly (5) comprises a first truss arm (501) and a second truss arm (502) with adjustable length, wherein the front end of the first truss arm (501) is articulated with the rear side of the turret (2), the front end of the second truss arm (502) is arranged at a distance below the front end of the first truss arm (501) and articulated with the rear side of the turret (2), the rear end of the first truss arm (501) is connected with the rear end of the second truss arm (502), and the second pulley block (302) is arranged at the rear ends of the first truss arm (501) and the second truss arm (502).

3. Luffing device for a crane according to claim 2, wherein the line on which the first pulley block (301) and the second pulley block (302) are located is L1, the line on which the first pulley block (301) and the center of rotation of the first end of the main mast (1) are located is L2, and the angle between line L1 and line L2 is 90 °.

4. The luffing apparatus for a crane according to claim 2, wherein the truss assembly (5) further comprises a plurality of intermediate connecting arms (503), one end of the intermediate connecting arms (503) being connected to the first truss arm (501), and the other end of the intermediate connecting arms (503) being connected to the second truss arm (502).

5. Luffing device for a crane according to claim 4, wherein the cross-section of the first truss arm (501), the second truss arm (502) and the intermediate connecting arm (503) is circular, square-ring or rectangular.

6. Luffing device for a crane according to any of claims 1 to 5, wherein a counterweight means (6) is provided below the truss assembly (5).

7. Luffing apparatus for a crane according to claim 6, wherein the counterweight mechanism (6) comprises a counterweight base (601) arranged below the truss assembly (5) and a plurality of counterweight blocks (602) detachably arranged on the counterweight base (601).

8. Luffing device for a crane according to claim 7, wherein the counterweight mechanism (6) further comprises a lifting member (603) for adjusting the height of the counterweight base (601).

9. Luffing device for a crane according to claim 8, wherein the lifting member (603) is a telescopic cylinder.

10. A crane, characterized in that the crane comprises a luffing device for a crane according to any one of claims 1-9.

Images